1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 package com.sun.org.apache.bcel.internal.generic; 22 23 import com.sun.org.apache.bcel.internal.Const; 24 25 /** 26 * Denotes array type, such as int[][] 27 * 28 */ 29 public final class ArrayType extends ReferenceType { 30 31 private int dimensions; 32 private Type basic_type; 33 34 35 /** 36 * Convenience constructor for array type, e.g. int[] 37 * 38 * @param type array type, e.g. T_INT 39 */ 40 public ArrayType(final byte type, final int dimensions) { 41 this(BasicType.getType(type), dimensions); 42 } 43 44 45 /** 46 * Convenience constructor for reference array type, e.g. Object[] 47 * 48 * @param class_name complete name of class (java.lang.String, e.g.) 49 */ 50 public ArrayType(final String class_name, final int dimensions) { 51 this(ObjectType.getInstance(class_name), dimensions); 52 } 53 54 55 /** 56 * Constructor for array of given type 57 * 58 * @param type type of array (may be an array itself) 59 */ 60 public ArrayType(final Type type, final int dimensions) { 61 super(Const.T_ARRAY, "<dummy>"); 62 if ((dimensions < 1) || (dimensions > Const.MAX_BYTE)) { 63 throw new ClassGenException("Invalid number of dimensions: " + dimensions); 64 } 65 switch (type.getType()) { 66 case Const.T_ARRAY: 67 final ArrayType array = (ArrayType) type; 68 this.dimensions = dimensions + array.dimensions; 69 basic_type = array.basic_type; 70 break; 71 case Const.T_VOID: 72 throw new ClassGenException("Invalid type: void[]"); 73 default: // Basic type or reference 74 this.dimensions = dimensions; 75 basic_type = type; 76 break; 77 } 78 final StringBuilder buf = new StringBuilder(); 79 for (int i = 0; i < this.dimensions; i++) { 80 buf.append('['); 81 } 82 buf.append(basic_type.getSignature()); 83 super.setSignature(buf.toString()); 84 } 85 86 87 /** 88 * @return basic type of array, i.e., for int[][][] the basic type is int 89 */ 90 public Type getBasicType() { 91 return basic_type; 92 } 93 94 95 /** 96 * @return element type of array, i.e., for int[][][] the element type is int[][] 97 */ 98 public Type getElementType() { 99 if (dimensions == 1) { 100 return basic_type; 101 } 102 return new ArrayType(basic_type, dimensions - 1); 103 } 104 105 106 /** @return number of dimensions of array 107 */ 108 public int getDimensions() { 109 return dimensions; 110 } 111 112 113 /** @return a hash code value for the object. 114 */ 115 @Override 116 public int hashCode() { 117 return basic_type.hashCode() ^ dimensions; 118 } 119 120 121 /** @return true if both type objects refer to the same array type. 122 */ 123 @Override 124 public boolean equals( final Object _type ) { 125 if (_type instanceof ArrayType) { 126 final ArrayType array = (ArrayType) _type; 127 return (array.dimensions == dimensions) && array.basic_type.equals(basic_type); 128 } 129 return false; 130 } 131 }