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+/*
+ * 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);
+ }
+
+}