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Diffstat (limited to 'src/main/java/org/apache/commons/lang3/mutable')
10 files changed, 2724 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/lang3/mutable/Mutable.java b/src/main/java/org/apache/commons/lang3/mutable/Mutable.java new file mode 100644 index 000000000..e6c748524 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/Mutable.java @@ -0,0 +1,55 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.commons.lang3.mutable; + +/** + * Provides mutable access to a value. + * <p> + * {@link Mutable} is used as a generic interface to the implementations in this package. + * </p> + * <p> + * A typical use case would be to enable a primitive or string to be passed to a method and allow that method to + * effectively change the value of the primitive/string. Another use case is to store a frequently changing primitive in + * a collection (for example a total in a map) without needing to create new Integer/Long wrapper objects. + * </p> + * + * @param <T> the type to set and get + * @since 2.1 + */ +public interface Mutable<T> { + + /** + * Gets the value of this mutable. + * + * @return the stored value + */ + T getValue(); + + /** + * Sets the value of this mutable. + * + * @param value + * the value to store + * @throws NullPointerException + * if the object is null and null is invalid + * @throws ClassCastException + * if the type is invalid + */ + void setValue(T value); + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableBoolean.java b/src/main/java/org/apache/commons/lang3/mutable/MutableBoolean.java new file mode 100644 index 000000000..68511c33b --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableBoolean.java @@ -0,0 +1,205 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.commons.lang3.mutable; + +import java.io.Serializable; + +import org.apache.commons.lang3.BooleanUtils; + +/** + * A mutable {@code boolean} wrapper. + * <p> + * Note that as MutableBoolean does not extend Boolean, it is not treated by String.format as a Boolean parameter. + * </p> + * + * @see Boolean + * @since 2.2 + */ +public class MutableBoolean implements Mutable<Boolean>, Serializable, Comparable<MutableBoolean> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = -4830728138360036487L; + + /** The mutable value. */ + private boolean value; + + /** + * Constructs a new MutableBoolean with the default value of false. + */ + public MutableBoolean() { + } + + /** + * Constructs a new MutableBoolean with the specified value. + * + * @param value the initial value to store + */ + public MutableBoolean(final boolean value) { + this.value = value; + } + + /** + * Constructs a new MutableBoolean with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableBoolean(final Boolean value) { + this.value = value.booleanValue(); + } + + /** + * Gets the value as a Boolean instance. + * + * @return the value as a Boolean, never null + */ + @Override + public Boolean getValue() { + return Boolean.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final boolean value) { + this.value = value; + } + + /** + * Sets the value to false. + * + * @since 3.3 + */ + public void setFalse() { + this.value = false; + } + + /** + * Sets the value to true. + * + * @since 3.3 + */ + public void setTrue() { + this.value = true; + } + + /** + * Sets the value from any Boolean instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Boolean value) { + this.value = value.booleanValue(); + } + + /** + * Checks if the current value is {@code true}. + * + * @return {@code true} if the current value is {@code true} + * @since 2.5 + */ + public boolean isTrue() { + return value; + } + + /** + * Checks if the current value is {@code false}. + * + * @return {@code true} if the current value is {@code false} + * @since 2.5 + */ + public boolean isFalse() { + return !value; + } + + /** + * Returns the value of this MutableBoolean as a boolean. + * + * @return the boolean value represented by this object. + */ + public boolean booleanValue() { + return value; + } + + /** + * Gets this mutable as an instance of Boolean. + * + * @return a Boolean instance containing the value from this mutable, never null + * @since 2.5 + */ + public Boolean toBoolean() { + return Boolean.valueOf(booleanValue()); + } + + /** + * Compares this object to the specified object. The result is {@code true} if and only if the argument is + * not {@code null} and is an {@link MutableBoolean} object that contains the same + * {@code boolean} value as this object. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj instanceof MutableBoolean) { + return value == ((MutableBoolean) obj).booleanValue(); + } + return false; + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return the hash code returned by {@code Boolean.TRUE} or {@code Boolean.FALSE} + */ + @Override + public int hashCode() { + return value ? Boolean.TRUE.hashCode() : Boolean.FALSE.hashCode(); + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + * where false is less than true + */ + @Override + public int compareTo(final MutableBoolean other) { + return BooleanUtils.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableByte.java b/src/main/java/org/apache/commons/lang3/mutable/MutableByte.java new file mode 100644 index 000000000..94d973805 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableByte.java @@ -0,0 +1,381 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +import org.apache.commons.lang3.math.NumberUtils; + +/** + * A mutable {@code byte} wrapper. + * <p> + * Note that as MutableByte does not extend Byte, it is not treated by String.format as a Byte parameter. + * </p> + * + * @see Byte + * @since 2.1 + */ +public class MutableByte extends Number implements Comparable<MutableByte>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = -1585823265L; + + /** The mutable value. */ + private byte value; + + /** + * Constructs a new MutableByte with the default value of zero. + */ + public MutableByte() { + } + + /** + * Constructs a new MutableByte with the specified value. + * + * @param value the initial value to store + */ + public MutableByte(final byte value) { + this.value = value; + } + + /** + * Constructs a new MutableByte with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableByte(final Number value) { + this.value = value.byteValue(); + } + + /** + * Constructs a new MutableByte parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into a byte + * @since 2.5 + */ + public MutableByte(final String value) { + this.value = Byte.parseByte(value); + } + + /** + * Gets the value as a Byte instance. + * + * @return the value as a Byte, never null + */ + @Override + public Byte getValue() { + return Byte.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final byte value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.byteValue(); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public byte getAndIncrement() { + final byte last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public byte incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public byte getAndDecrement() { + final byte last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public byte decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @since 2.2 + */ + public void add(final byte operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.byteValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @since 2.2 + */ + public void subtract(final byte operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.byteValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public byte addAndGet(final byte operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public byte addAndGet(final Number operand) { + this.value += operand.byteValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public byte getAndAdd(final byte operand) { + final byte last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public byte getAndAdd(final Number operand) { + final byte last = value; + this.value += operand.byteValue(); + return last; + } + + // shortValue relies on Number implementation + /** + * Returns the value of this MutableByte as a byte. + * + * @return the numeric value represented by this object after conversion to type byte. + */ + @Override + public byte byteValue() { + return value; + } + + /** + * Returns the value of this MutableByte as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return value; + } + + /** + * Returns the value of this MutableByte as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return value; + } + + /** + * Returns the value of this MutableByte as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return value; + } + + /** + * Returns the value of this MutableByte as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Byte. + * + * @return a Byte instance containing the value from this mutable + */ + public Byte toByte() { + return Byte.valueOf(byteValue()); + } + + /** + * Compares this object to the specified object. The result is {@code true} if and only if the argument is + * not {@code null} and is a {@link MutableByte} object that contains the same {@code byte} value + * as this object. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj instanceof MutableByte) { + return value == ((MutableByte) obj).byteValue(); + } + return false; + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + return value; + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableByte other) { + return NumberUtils.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableDouble.java b/src/main/java/org/apache/commons/lang3/mutable/MutableDouble.java new file mode 100644 index 000000000..3f0d0e6bb --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableDouble.java @@ -0,0 +1,407 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +/** + * A mutable {@code double} wrapper. + * <p> + * Note that as MutableDouble does not extend Double, it is not treated by String.format as a Double parameter. + * </p> + * + * @see Double + * @since 2.1 + */ +public class MutableDouble extends Number implements Comparable<MutableDouble>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = 1587163916L; + + /** The mutable value. */ + private double value; + + /** + * Constructs a new MutableDouble with the default value of zero. + */ + public MutableDouble() { + } + + /** + * Constructs a new MutableDouble with the specified value. + * + * @param value the initial value to store + */ + public MutableDouble(final double value) { + this.value = value; + } + + /** + * Constructs a new MutableDouble with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableDouble(final Number value) { + this.value = value.doubleValue(); + } + + /** + * Constructs a new MutableDouble parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into a double + * @since 2.5 + */ + public MutableDouble(final String value) { + this.value = Double.parseDouble(value); + } + + /** + * Gets the value as a Double instance. + * + * @return the value as a Double, never null + */ + @Override + public Double getValue() { + return Double.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final double value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.doubleValue(); + } + + /** + * Checks whether the double value is the special NaN value. + * + * @return true if NaN + */ + public boolean isNaN() { + return Double.isNaN(value); + } + + /** + * Checks whether the double value is infinite. + * + * @return true if infinite + */ + public boolean isInfinite() { + return Double.isInfinite(value); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public double getAndIncrement() { + final double last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public double incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public double getAndDecrement() { + final double last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public double decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add + * @since 2.2 + */ + public void add(final double operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.doubleValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @since 2.2 + */ + public void subtract(final double operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.doubleValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public double addAndGet(final double operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public double addAndGet(final Number operand) { + this.value += operand.doubleValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public double getAndAdd(final double operand) { + final double last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public double getAndAdd(final Number operand) { + final double last = value; + this.value += operand.doubleValue(); + return last; + } + + // shortValue and byteValue rely on Number implementation + /** + * Returns the value of this MutableDouble as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return (int) value; + } + + /** + * Returns the value of this MutableDouble as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return (long) value; + } + + /** + * Returns the value of this MutableDouble as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return (float) value; + } + + /** + * Returns the value of this MutableDouble as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Double. + * + * @return a Double instance containing the value from this mutable, never null + */ + public Double toDouble() { + return Double.valueOf(doubleValue()); + } + + /** + * Compares this object against the specified object. The result is {@code true} if and only if the argument + * is not {@code null} and is a {@link Double} object that represents a double that has the identical + * bit pattern to the bit pattern of the double represented by this object. For this purpose, two + * {@code double} values are considered to be the same if and only if the method + * {@link Double#doubleToLongBits(double)}returns the same long value when applied to each. + * <p> + * Note that in most cases, for two instances of class {@link Double},{@code d1} and {@code d2}, + * the value of {@code d1.equals(d2)} is {@code true} if and only if <blockquote> + * + * <pre> + * d1.doubleValue() == d2.doubleValue() + * </pre> + * + * </blockquote> + * <p> + * also has the value {@code true}. However, there are two exceptions: + * <ul> + * <li>If {@code d1} and {@code d2} both represent {@code Double.NaN}, then the + * {@code equals} method returns {@code true}, even though {@code Double.NaN==Double.NaN} has + * the value {@code false}. + * <li>If {@code d1} represents {@code +0.0} while {@code d2} represents {@code -0.0}, + * or vice versa, the {@code equal} test has the value {@code false}, even though + * {@code +0.0==-0.0} has the value {@code true}. This allows hashtables to operate properly. + * </ul> + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + return obj instanceof MutableDouble + && Double.doubleToLongBits(((MutableDouble) obj).value) == Double.doubleToLongBits(value); + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + final long bits = Double.doubleToLongBits(value); + return (int) (bits ^ bits >>> 32); + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableDouble other) { + return Double.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableFloat.java b/src/main/java/org/apache/commons/lang3/mutable/MutableFloat.java new file mode 100644 index 000000000..d1aa9f802 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableFloat.java @@ -0,0 +1,408 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +/** + * A mutable {@code float} wrapper. + * <p> + * Note that as MutableFloat does not extend Float, it is not treated by String.format as a Float parameter. + * </p> + * + * @see Float + * @since 2.1 + */ +public class MutableFloat extends Number implements Comparable<MutableFloat>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = 5787169186L; + + /** The mutable value. */ + private float value; + + /** + * Constructs a new MutableFloat with the default value of zero. + */ + public MutableFloat() { + } + + /** + * Constructs a new MutableFloat with the specified value. + * + * @param value the initial value to store + */ + public MutableFloat(final float value) { + this.value = value; + } + + /** + * Constructs a new MutableFloat with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableFloat(final Number value) { + this.value = value.floatValue(); + } + + /** + * Constructs a new MutableFloat parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into a float + * @since 2.5 + */ + public MutableFloat(final String value) { + this.value = Float.parseFloat(value); + } + + /** + * Gets the value as a Float instance. + * + * @return the value as a Float, never null + */ + @Override + public Float getValue() { + return Float.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final float value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.floatValue(); + } + + /** + * Checks whether the float value is the special NaN value. + * + * @return true if NaN + */ + public boolean isNaN() { + return Float.isNaN(value); + } + + /** + * Checks whether the float value is infinite. + * + * @return true if infinite + */ + public boolean isInfinite() { + return Float.isInfinite(value); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public float getAndIncrement() { + final float last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public float incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public float getAndDecrement() { + final float last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public float decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @since 2.2 + */ + public void add(final float operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.floatValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract + * @since 2.2 + */ + public void subtract(final float operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.floatValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public float addAndGet(final float operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public float addAndGet(final Number operand) { + this.value += operand.floatValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public float getAndAdd(final float operand) { + final float last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public float getAndAdd(final Number operand) { + final float last = value; + this.value += operand.floatValue(); + return last; + } + + // shortValue and byteValue rely on Number implementation + /** + * Returns the value of this MutableFloat as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return (int) value; + } + + /** + * Returns the value of this MutableFloat as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return (long) value; + } + + /** + * Returns the value of this MutableFloat as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return value; + } + + /** + * Returns the value of this MutableFloat as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Float. + * + * @return a Float instance containing the value from this mutable, never null + */ + public Float toFloat() { + return Float.valueOf(floatValue()); + } + + /** + * Compares this object against some other object. The result is {@code true} if and only if the argument is + * not {@code null} and is a {@link Float} object that represents a {@code float} that has the + * identical bit pattern to the bit pattern of the {@code float} represented by this object. For this + * purpose, two float values are considered to be the same if and only if the method + * {@link Float#floatToIntBits(float)}returns the same int value when applied to each. + * <p> + * Note that in most cases, for two instances of class {@link Float},{@code f1} and {@code f2}, + * the value of {@code f1.equals(f2)} is {@code true} if and only if <blockquote> + * + * <pre> + * f1.floatValue() == f2.floatValue() + * </pre> + * + * </blockquote> + * <p> + * also has the value {@code true}. However, there are two exceptions: + * <ul> + * <li>If {@code f1} and {@code f2} both represent {@code Float.NaN}, then the + * {@code equals} method returns {@code true}, even though {@code Float.NaN==Float.NaN} has + * the value {@code false}. + * <li>If {@code f1} represents {@code +0.0f} while {@code f2} represents {@code -0.0f}, + * or vice versa, the {@code equal} test has the value {@code false}, even though + * {@code 0.0f==-0.0f} has the value {@code true}. + * </ul> + * This definition allows hashtables to operate properly. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + * @see Float#floatToIntBits(float) + */ + @Override + public boolean equals(final Object obj) { + return obj instanceof MutableFloat + && Float.floatToIntBits(((MutableFloat) obj).value) == Float.floatToIntBits(value); + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + return Float.floatToIntBits(value); + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableFloat other) { + return Float.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableInt.java b/src/main/java/org/apache/commons/lang3/mutable/MutableInt.java new file mode 100644 index 000000000..99e78b972 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableInt.java @@ -0,0 +1,371 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +import org.apache.commons.lang3.math.NumberUtils; + +/** + * A mutable {@code int} wrapper. + * <p> + * Note that as MutableInt does not extend Integer, it is not treated by String.format as an Integer parameter. + * </p> + * + * @see Integer + * @since 2.1 + */ +public class MutableInt extends Number implements Comparable<MutableInt>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = 512176391864L; + + /** The mutable value. */ + private int value; + + /** + * Constructs a new MutableInt with the default value of zero. + */ + public MutableInt() { + } + + /** + * Constructs a new MutableInt with the specified value. + * + * @param value the initial value to store + */ + public MutableInt(final int value) { + this.value = value; + } + + /** + * Constructs a new MutableInt with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableInt(final Number value) { + this.value = value.intValue(); + } + + /** + * Constructs a new MutableInt parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into an int + * @since 2.5 + */ + public MutableInt(final String value) { + this.value = Integer.parseInt(value); + } + + /** + * Gets the value as a Integer instance. + * + * @return the value as a Integer, never null + */ + @Override + public Integer getValue() { + return Integer.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final int value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.intValue(); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public int getAndIncrement() { + final int last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public int incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public int getAndDecrement() { + final int last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public int decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @since 2.2 + */ + public void add(final int operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.intValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @since 2.2 + */ + public void subtract(final int operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.intValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public int addAndGet(final int operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public int addAndGet(final Number operand) { + this.value += operand.intValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public int getAndAdd(final int operand) { + final int last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public int getAndAdd(final Number operand) { + final int last = value; + this.value += operand.intValue(); + return last; + } + + // shortValue and byteValue rely on Number implementation + /** + * Returns the value of this MutableInt as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return value; + } + + /** + * Returns the value of this MutableInt as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return value; + } + + /** + * Returns the value of this MutableInt as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return value; + } + + /** + * Returns the value of this MutableInt as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Integer. + * + * @return an Integer instance containing the value from this mutable, never null + */ + public Integer toInteger() { + return Integer.valueOf(intValue()); + } + + /** + * Compares this object to the specified object. The result is {@code true} if and only if the argument is + * not {@code null} and is a {@link MutableInt} object that contains the same {@code int} value + * as this object. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj instanceof MutableInt) { + return value == ((MutableInt) obj).intValue(); + } + return false; + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + return value; + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableInt other) { + return NumberUtils.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableLong.java b/src/main/java/org/apache/commons/lang3/mutable/MutableLong.java new file mode 100644 index 000000000..651c6994f --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableLong.java @@ -0,0 +1,371 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +import org.apache.commons.lang3.math.NumberUtils; + +/** + * A mutable {@code long} wrapper. + * <p> + * Note that as MutableLong does not extend Long, it is not treated by String.format as a Long parameter. + * </p> + * + * @see Long + * @since 2.1 + */ +public class MutableLong extends Number implements Comparable<MutableLong>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = 62986528375L; + + /** The mutable value. */ + private long value; + + /** + * Constructs a new MutableLong with the default value of zero. + */ + public MutableLong() { + } + + /** + * Constructs a new MutableLong with the specified value. + * + * @param value the initial value to store + */ + public MutableLong(final long value) { + this.value = value; + } + + /** + * Constructs a new MutableLong with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableLong(final Number value) { + this.value = value.longValue(); + } + + /** + * Constructs a new MutableLong parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into a long + * @since 2.5 + */ + public MutableLong(final String value) { + this.value = Long.parseLong(value); + } + + /** + * Gets the value as a Long instance. + * + * @return the value as a Long, never null + */ + @Override + public Long getValue() { + return Long.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final long value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.longValue(); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public long getAndIncrement() { + final long last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public long incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public long getAndDecrement() { + final long last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public long decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @since 2.2 + */ + public void add(final long operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.longValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @since 2.2 + */ + public void subtract(final long operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.longValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public long addAndGet(final long operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public long addAndGet(final Number operand) { + this.value += operand.longValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public long getAndAdd(final long operand) { + final long last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public long getAndAdd(final Number operand) { + final long last = value; + this.value += operand.longValue(); + return last; + } + + // shortValue and byteValue rely on Number implementation + /** + * Returns the value of this MutableLong as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return (int) value; + } + + /** + * Returns the value of this MutableLong as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return value; + } + + /** + * Returns the value of this MutableLong as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return value; + } + + /** + * Returns the value of this MutableLong as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Long. + * + * @return a Long instance containing the value from this mutable, never null + */ + public Long toLong() { + return Long.valueOf(longValue()); + } + + /** + * Compares this object to the specified object. The result is {@code true} if and only if the argument + * is not {@code null} and is a {@link MutableLong} object that contains the same {@code long} + * value as this object. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj instanceof MutableLong) { + return value == ((MutableLong) obj).longValue(); + } + return false; + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + return (int) (value ^ (value >>> 32)); + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableLong other) { + return NumberUtils.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableObject.java b/src/main/java/org/apache/commons/lang3/mutable/MutableObject.java new file mode 100644 index 000000000..7c371f783 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableObject.java @@ -0,0 +1,121 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.commons.lang3.mutable; + +import java.io.Serializable; +import java.util.Objects; + +/** + * A mutable {@link Object} wrapper. + * + * @param <T> the type to set and get + * @since 2.1 + */ +public class MutableObject<T> implements Mutable<T>, Serializable { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = 86241875189L; + + /** The mutable value. */ + private T value; + + /** + * Constructs a new MutableObject with the default value of {@code null}. + */ + public MutableObject() { + } + + /** + * Constructs a new MutableObject with the specified value. + * + * @param value the initial value to store + */ + public MutableObject(final T value) { + this.value = value; + } + + /** + * Gets the value. + * + * @return the value, may be null + */ + @Override + public T getValue() { + return this.value; + } + + /** + * Sets the value. + * + * @param value the value to set + */ + @Override + public void setValue(final T value) { + this.value = value; + } + + /** + * Compares this object against the specified object. The result is {@code true} if and only if the argument + * is not {@code null} and is a {@link MutableObject} object that contains the same {@link T} + * value as this object. + * + * @param obj the object to compare with, {@code null} returns {@code false} + * @return {@code true} if the objects are the same; + * {@code true} if the objects have equivalent {@code value} fields; + * {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj == null) { + return false; + } + if (this == obj) { + return true; + } + if (this.getClass() == obj.getClass()) { + final MutableObject<?> that = (MutableObject<?>) obj; + return this.value.equals(that.value); + } + return false; + } + + /** + * Returns the value's hash code or {@code 0} if the value is {@code null}. + * + * @return the value's hash code or {@code 0} if the value is {@code null}. + */ + @Override + public int hashCode() { + return Objects.hashCode(value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return Objects.toString(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/MutableShort.java b/src/main/java/org/apache/commons/lang3/mutable/MutableShort.java new file mode 100644 index 000000000..4378ad190 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/MutableShort.java @@ -0,0 +1,381 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3.mutable; + +import org.apache.commons.lang3.math.NumberUtils; + +/** + * A mutable {@code short} wrapper. + * <p> + * Note that as MutableShort does not extend Short, it is not treated by String.format as a Short parameter. + * </p> + * + * @see Short + * @since 2.1 + */ +public class MutableShort extends Number implements Comparable<MutableShort>, Mutable<Number> { + + /** + * Required for serialization support. + * + * @see java.io.Serializable + */ + private static final long serialVersionUID = -2135791679L; + + /** The mutable value. */ + private short value; + + /** + * Constructs a new MutableShort with the default value of zero. + */ + public MutableShort() { + } + + /** + * Constructs a new MutableShort with the specified value. + * + * @param value the initial value to store + */ + public MutableShort(final short value) { + this.value = value; + } + + /** + * Constructs a new MutableShort with the specified value. + * + * @param value the initial value to store, not null + * @throws NullPointerException if the object is null + */ + public MutableShort(final Number value) { + this.value = value.shortValue(); + } + + /** + * Constructs a new MutableShort parsing the given string. + * + * @param value the string to parse, not null + * @throws NumberFormatException if the string cannot be parsed into a short + * @since 2.5 + */ + public MutableShort(final String value) { + this.value = Short.parseShort(value); + } + + /** + * Gets the value as a Short instance. + * + * @return the value as a Short, never null + */ + @Override + public Short getValue() { + return Short.valueOf(this.value); + } + + /** + * Sets the value. + * + * @param value the value to set + */ + public void setValue(final short value) { + this.value = value; + } + + /** + * Sets the value from any Number instance. + * + * @param value the value to set, not null + * @throws NullPointerException if the object is null + */ + @Override + public void setValue(final Number value) { + this.value = value.shortValue(); + } + + /** + * Increments the value. + * + * @since 2.2 + */ + public void increment() { + value++; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the increment operation. This method is not thread safe. + * + * @return the value associated with the instance before it was incremented + * @since 3.5 + */ + public short getAndIncrement() { + final short last = value; + value++; + return last; + } + + /** + * Increments this instance's value by 1; this method returns the value associated with the instance + * immediately after the increment operation. This method is not thread safe. + * + * @return the value associated with the instance after it is incremented + * @since 3.5 + */ + public short incrementAndGet() { + value++; + return value; + } + + /** + * Decrements the value. + * + * @since 2.2 + */ + public void decrement() { + value--; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately prior to the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance before it was decremented + * @since 3.5 + */ + public short getAndDecrement() { + final short last = value; + value--; + return last; + } + + /** + * Decrements this instance's value by 1; this method returns the value associated with the instance + * immediately after the decrement operation. This method is not thread safe. + * + * @return the value associated with the instance after it is decremented + * @since 3.5 + */ + public short decrementAndGet() { + value--; + return value; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @since 2.2 + */ + public void add(final short operand) { + this.value += operand; + } + + /** + * Adds a value to the value of this instance. + * + * @param operand the value to add, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void add(final Number operand) { + this.value += operand.shortValue(); + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @since 2.2 + */ + public void subtract(final short operand) { + this.value -= operand; + } + + /** + * Subtracts a value from the value of this instance. + * + * @param operand the value to subtract, not null + * @throws NullPointerException if the object is null + * @since 2.2 + */ + public void subtract(final Number operand) { + this.value -= operand.shortValue(); + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public short addAndGet(final short operand) { + this.value += operand; + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately after the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance after adding the operand + * @since 3.5 + */ + public short addAndGet(final Number operand) { + this.value += operand.shortValue(); + return value; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public short getAndAdd(final short operand) { + final short last = value; + this.value += operand; + return last; + } + + /** + * Increments this instance's value by {@code operand}; this method returns the value associated with the instance + * immediately prior to the addition operation. This method is not thread safe. + * + * @param operand the quantity to add, not null + * @throws NullPointerException if {@code operand} is null + * @return the value associated with this instance immediately before the operand was added + * @since 3.5 + */ + public short getAndAdd(final Number operand) { + final short last = value; + this.value += operand.shortValue(); + return last; + } + + // byteValue relies on Number implementation + /** + * Returns the value of this MutableShort as a short. + * + * @return the numeric value represented by this object after conversion to type short. + */ + @Override + public short shortValue() { + return value; + } + + /** + * Returns the value of this MutableShort as an int. + * + * @return the numeric value represented by this object after conversion to type int. + */ + @Override + public int intValue() { + return value; + } + + /** + * Returns the value of this MutableShort as a long. + * + * @return the numeric value represented by this object after conversion to type long. + */ + @Override + public long longValue() { + return value; + } + + /** + * Returns the value of this MutableShort as a float. + * + * @return the numeric value represented by this object after conversion to type float. + */ + @Override + public float floatValue() { + return value; + } + + /** + * Returns the value of this MutableShort as a double. + * + * @return the numeric value represented by this object after conversion to type double. + */ + @Override + public double doubleValue() { + return value; + } + + /** + * Gets this mutable as an instance of Short. + * + * @return a Short instance containing the value from this mutable, never null + */ + public Short toShort() { + return Short.valueOf(shortValue()); + } + + /** + * Compares this object to the specified object. The result is {@code true} if and only if the argument + * is not {@code null} and is a {@link MutableShort} object that contains the same {@code short} + * value as this object. + * + * @param obj the object to compare with, null returns false + * @return {@code true} if the objects are the same; {@code false} otherwise. + */ + @Override + public boolean equals(final Object obj) { + if (obj instanceof MutableShort) { + return value == ((MutableShort) obj).shortValue(); + } + return false; + } + + /** + * Returns a suitable hash code for this mutable. + * + * @return a suitable hash code + */ + @Override + public int hashCode() { + return value; + } + + /** + * Compares this mutable to another in ascending order. + * + * @param other the other mutable to compare to, not null + * @return negative if this is less, zero if equal, positive if greater + */ + @Override + public int compareTo(final MutableShort other) { + return NumberUtils.compare(this.value, other.value); + } + + /** + * Returns the String value of this mutable. + * + * @return the mutable value as a string + */ + @Override + public String toString() { + return String.valueOf(value); + } + +} diff --git a/src/main/java/org/apache/commons/lang3/mutable/package-info.java b/src/main/java/org/apache/commons/lang3/mutable/package-info.java new file mode 100644 index 000000000..1b5aaec70 --- /dev/null +++ b/src/main/java/org/apache/commons/lang3/mutable/package-info.java @@ -0,0 +1,24 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/** + * Provides typed mutable wrappers to primitive values and Object. + * These wrappers are similar to the wrappers provided by the Java API, but allow the wrapped value to be changed without needing to create a separate wrapper object. + * These classes are not thread-safe. + * + * @since 2.1 + */ +package org.apache.commons.lang3.mutable; |