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1 package org.apache.bcel.classfile; 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 57 import org.apache.bcel.Constants; 58 import java.io.*; 59 60 /*** 61 * This class is derived from <em>Attribute</em> and denotes that this class 62 * is an Inner class of another. 63 * to the source file of this class. 64 * It is instantiated from the <em>Attribute.readAttribute()</em> method. 65 * 66 * @version $Id: InnerClasses.java,v 1.2 2002/03/11 16:16:35 mdahm Exp $ 67 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 68 * @see Attribute 69 */ 70 public final class InnerClasses extends Attribute { 71 private InnerClass[] inner_classes; 72 private int number_of_classes; 73 74 /*** 75 * Initialize from another object. Note that both objects use the same 76 * references (shallow copy). Use clone() for a physical copy. 77 */ 78 public InnerClasses(InnerClasses c) { 79 this(c.getNameIndex(), c.getLength(), c.getInnerClasses(), 80 c.getConstantPool()); 81 } 82 83 /*** 84 * @param name_index Index in constant pool to CONSTANT_Utf8 85 * @param length Content length in bytes 86 * @param inner_classes array of inner classes attributes 87 * @param constant_pool Array of constants 88 * @param sourcefile_index Index in constant pool to CONSTANT_Utf8 89 */ 90 public InnerClasses(int name_index, int length, 91 InnerClass[] inner_classes, 92 ConstantPool constant_pool) 93 { 94 super(Constants.ATTR_INNER_CLASSES, name_index, length, constant_pool); 95 setInnerClasses(inner_classes); 96 } 97 98 /*** 99 * Construct object from file stream. 100 * 101 * @param name_index Index in constant pool to CONSTANT_Utf8 102 * @param length Content length in bytes 103 * @param file Input stream 104 * @param constant_pool Array of constants 105 * @throws IOException 106 */ 107 InnerClasses(int name_index, int length, DataInputStream file, 108 ConstantPool constant_pool) throws IOException 109 { 110 this(name_index, length, (InnerClass[])null, constant_pool); 111 112 number_of_classes = file.readUnsignedShort(); 113 inner_classes = new InnerClass[number_of_classes]; 114 115 for(int i=0; i < number_of_classes; i++) 116 inner_classes[i] = new InnerClass(file); 117 } 118 /*** 119 * Called by objects that are traversing the nodes of the tree implicitely 120 * defined by the contents of a Java class. I.e., the hierarchy of methods, 121 * fields, attributes, etc. spawns a tree of objects. 122 * 123 * @param v Visitor object 124 */ 125 public void accept(Visitor v) { 126 v.visitInnerClasses(this); 127 } 128 /*** 129 * Dump source file attribute to file stream in binary format. 130 * 131 * @param file Output file stream 132 * @throws IOException 133 */ 134 public final void dump(DataOutputStream file) throws IOException 135 { 136 super.dump(file); 137 file.writeShort(number_of_classes); 138 139 for(int i=0; i < number_of_classes; i++) 140 inner_classes[i].dump(file); 141 } 142 143 /*** 144 * @return array of inner class "records" 145 */ 146 public final InnerClass[] getInnerClasses() { return inner_classes; } 147 148 /*** 149 * @param inner_classes. 150 */ 151 public final void setInnerClasses(InnerClass[] inner_classes) { 152 this.inner_classes = inner_classes; 153 number_of_classes = (inner_classes == null)? 0 : inner_classes.length; 154 } 155 156 /*** 157 * @return String representation. 158 */ 159 public final String toString() { 160 StringBuffer buf = new StringBuffer(); 161 162 for(int i=0; i < number_of_classes; i++) 163 buf.append(inner_classes[i].toString(constant_pool) + "\n"); 164 165 return buf.toString(); 166 } 167 168 /*** 169 * @return deep copy of this attribute 170 */ 171 public Attribute copy(ConstantPool constant_pool) { 172 InnerClasses c = (InnerClasses)clone(); 173 174 c.inner_classes = new InnerClass[number_of_classes]; 175 for(int i=0; i < number_of_classes; i++) 176 c.inner_classes[i] = inner_classes[i].copy(); 177 178 c.constant_pool = constant_pool; 179 return c; 180 } 181 }

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