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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.bcel.generic;
import org.apache.bcel.Const;
/**
* Denotes array type, such as int[][]
*
* @version $Id$
*/
public final class ArrayType extends ReferenceType {
private int dimensions;
private Type basic_type;
/**
* Convenience constructor for array type, e.g. int[]
*
* @param type array type, e.g. T_INT
*/
public ArrayType(final byte type, final int dimensions) {
this(BasicType.getType(type), dimensions);
}
/**
* Convenience constructor for reference array type, e.g. Object[]
*
* @param class_name complete name of class (java.lang.String, e.g.)
*/
public ArrayType(final String class_name, final int dimensions) {
this(ObjectType.getInstance(class_name), dimensions);
}
/**
* Constructor for array of given type
*
* @param type type of array (may be an array itself)
*/
public ArrayType(final Type type, final int dimensions) {
super(Const.T_ARRAY, "<dummy>");
if ((dimensions < 1) || (dimensions > Const.MAX_BYTE)) {
throw new ClassGenException("Invalid number of dimensions: " + dimensions);
}
switch (type.getType()) {
case Const.T_ARRAY:
final ArrayType array = (ArrayType) type;
this.dimensions = dimensions + array.dimensions;
basic_type = array.basic_type;
break;
case Const.T_VOID:
throw new ClassGenException("Invalid type: void[]");
default: // Basic type or reference
this.dimensions = dimensions;
basic_type = type;
break;
}
final StringBuilder buf = new StringBuilder();
for (int i = 0; i < this.dimensions; i++) {
buf.append('[');
}
buf.append(basic_type.getSignature());
super.setSignature(buf.toString());
}
/**
* @return basic type of array, i.e., for int[][][] the basic type is int
*/
public Type getBasicType() {
return basic_type;
}
/**
* @return element type of array, i.e., for int[][][] the element type is int[][]
*/
public Type getElementType() {
if (dimensions == 1) {
return basic_type;
}
return new ArrayType(basic_type, dimensions - 1);
}
/** @return number of dimensions of array
*/
public int getDimensions() {
return dimensions;
}
/** @return a hash code value for the object.
*/
@Override
public int hashCode() {
return basic_type.hashCode() ^ dimensions;
}
/** @return true if both type objects refer to the same array type.
*/
@Override
public boolean equals( final Object _type ) {
if (_type instanceof ArrayType) {
final ArrayType array = (ArrayType) _type;
return (array.dimensions == dimensions) && array.basic_type.equals(basic_type);
}
return false;
}
}
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