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1 package org.apache.bcel.generic; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 import org.apache.bcel.Constants; 57 58 /*** 59 * Denotes array type, such as int[][] 60 * 61 * @version $Id: ArrayType.java,v 1.1.1.1 2001/10/29 20:00:06 jvanzyl Exp $ 62 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 63 */ 64 public final class ArrayType extends ReferenceType { 65 private int dimensions; 66 private Type basic_type; 67 68 /*** 69 * Convenience constructor for array type, e.g. int[] 70 * 71 * @param type array type, e.g. T_INT 72 */ 73 public ArrayType(byte type, int dimensions) { 74 this(BasicType.getType(type), dimensions); 75 } 76 77 /*** 78 * Convenience constructor for reference array type, e.g. Object[] 79 * 80 * @param class_name complete name of class (java.lang.String, e.g.) 81 */ 82 public ArrayType(String class_name, int dimensions) { 83 this(new ObjectType(class_name), dimensions); 84 } 85 86 /*** 87 * Constructor for array of given type 88 * 89 * @param type type of array (may be an array itself) 90 */ 91 public ArrayType(Type type, int dimensions) { 92 super(Constants.T_ARRAY, "<dummy>"); 93 94 if((dimensions < 1) || (dimensions > Constants.MAX_BYTE)) 95 throw new ClassGenException("Invalid number of dimensions: " + dimensions); 96 97 switch(type.getType()) { 98 case Constants.T_ARRAY: 99 ArrayType array = (ArrayType)type; 100 this.dimensions = dimensions + array.dimensions; 101 basic_type = array.basic_type; 102 break; 103 104 case Constants.T_VOID: 105 throw new ClassGenException("Invalid type: void[]"); 106 107 default: // Basic type or reference 108 this.dimensions = dimensions; 109 basic_type = type; 110 break; 111 } 112 113 StringBuffer buf = new StringBuffer(); 114 for(int i=0; i < this.dimensions; i++) 115 buf.append('['); 116 117 buf.append(basic_type.getSignature()); 118 119 signature = buf.toString(); 120 } 121 122 /*** 123 * @return basic type of array, i.e., for int[][][] the basic type is int 124 */ 125 public Type getBasicType() { 126 return basic_type; 127 } 128 129 /*** 130 * @return element type of array, i.e., for int[][][] the element type is int[][] 131 */ 132 public Type getElementType() { 133 if(dimensions == 1) 134 return basic_type; 135 else 136 return new ArrayType(basic_type, dimensions - 1); 137 } 138 139 /*** @return number of dimensions of array 140 */ 141 public int getDimensions() { return dimensions; } 142 143 /*** @return a hash code value for the object. 144 */ 145 public int hashcode() { return basic_type.hashCode() ^ dimensions; } 146 147 /*** @return true if both type objects refer to the same array type. 148 */ 149 public boolean equals(Object type) { 150 if(type instanceof ArrayType) { 151 ArrayType array = (ArrayType)type; 152 return (array.dimensions == dimensions) && array.basic_type.equals(basic_type); 153 } else 154 return false; 155 } 156 }

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