View Javadoc
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 import java.io.*; 57 import org.apache.bcel.Constants; 58 59 /*** 60 * Abstract super class for Fieldref and Methodref constants. 61 * 62 * @version $Id: ConstantCP.java,v 1.2 2002/03/11 16:16:35 mdahm Exp $ 63 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 64 * @see ConstantFieldref 65 * @see ConstantMethodref 66 * @see ConstantInterfaceMethodref 67 */ 68 public abstract class ConstantCP extends Constant { 69 /*** References to the constants containing the class and the field signature 70 */ 71 protected int class_index, name_and_type_index; 72 73 /*** 74 * Initialize from another object. 75 */ 76 public ConstantCP(ConstantCP c) { 77 this(c.getTag(), c.getClassIndex(), c.getNameAndTypeIndex()); 78 } 79 80 /*** 81 * Initialize instance from file data. 82 * 83 * @param tag Constant type tag 84 * @param file Input stream 85 * @throws IOException 86 */ 87 ConstantCP(byte tag, DataInputStream file) throws IOException 88 { 89 this(tag, file.readUnsignedShort(), file.readUnsignedShort()); 90 } 91 92 /*** 93 * @param class_index Reference to the class containing the field 94 * @param name_and_type_index and the field signature 95 */ 96 protected ConstantCP(byte tag, int class_index, 97 int name_and_type_index) { 98 super(tag); 99 this.class_index = class_index; 100 this.name_and_type_index = name_and_type_index; 101 } 102 103 /*** 104 * Dump constant field reference to file stream in binary format. 105 * 106 * @param file Output file stream 107 * @throws IOException 108 */ 109 public final void dump(DataOutputStream file) throws IOException 110 { 111 file.writeByte(tag); 112 file.writeShort(class_index); 113 file.writeShort(name_and_type_index); 114 } 115 116 /*** 117 * @return Reference (index) to class this field or method belongs to. 118 */ 119 public final int getClassIndex() { return class_index; } 120 121 /*** 122 * @return Reference (index) to signature of the field. 123 */ 124 public final int getNameAndTypeIndex() { return name_and_type_index; } 125 126 /*** 127 * @param class_index points to Constant_class 128 */ 129 public final void setClassIndex(int class_index) { 130 this.class_index = class_index; 131 } 132 133 /*** 134 * @return Class this field belongs to. 135 */ 136 public String getClass(ConstantPool cp) { 137 return cp.constantToString(class_index, Constants.CONSTANT_Class); 138 } 139 140 /*** 141 * @param name_and_type_index points to Constant_NameAndType 142 */ 143 public final void setNameAndTypeIndex(int name_and_type_index) { 144 this.name_and_type_index = name_and_type_index; 145 } 146 147 /*** 148 * @return String representation. 149 */ 150 public final String toString() { 151 return super.toString() + "(class_index = " + class_index + 152 ", name_and_type_index = " + name_and_type_index + ")"; 153 } 154 }

This page was automatically generated by Maven