1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.classfile.constant; 22 23 import proguard.classfile.*; 24 import proguard.classfile.constant.visitor.*; 25 import proguard.classfile.visitor.ClassVisitor; 26 27 /** 28 * This Constant represents an invoke dynamic constant in the constant pool. 29 * 30 * @author Eric Lafortune 31 */ 32 public class InvokeDynamicConstant extends Constant 33 { 34 public int u2bootstrapMethodAttributeIndex; 35 public int u2nameAndTypeIndex; 36 37 /** 38 * An extra field pointing to the Clazz objects referenced in the 39 * descriptor string. This field is filled out by the <code>{@link 40 * proguard.classfile.util.ClassReferenceInitializer ClassReferenceInitializer}</code>. 41 * References to primitive types are ignored. 42 */ 43 public Clazz[] referencedClasses; 44 45 46 /** 47 * Creates an uninitialized InvokeDynamicConstant. 48 */ InvokeDynamicConstant()49 public InvokeDynamicConstant() 50 { 51 } 52 53 54 /** 55 * Creates a new InvokeDynamicConstant with the given bootstrap method 56 * and name-and-type indices. 57 * @param u2bootstrapMethodAttributeIndex the index of the bootstrap method 58 * entry in the bootstrap methods 59 * attribute. 60 * @param u2nameAndTypeIndex the index of the name and type 61 * entry in the constant pool. 62 * @param referencedClasses the classes referenced by the 63 * type. 64 */ InvokeDynamicConstant(int u2bootstrapMethodAttributeIndex, int u2nameAndTypeIndex, Clazz[] referencedClasses)65 public InvokeDynamicConstant(int u2bootstrapMethodAttributeIndex, 66 int u2nameAndTypeIndex, 67 Clazz[] referencedClasses) 68 { 69 this.u2bootstrapMethodAttributeIndex = u2bootstrapMethodAttributeIndex; 70 this.u2nameAndTypeIndex = u2nameAndTypeIndex; 71 this.referencedClasses = referencedClasses; 72 } 73 74 75 /** 76 * Returns the index of the bootstrap method in the bootstrap methods 77 * attribute of the class. 78 */ getBootstrapMethodAttributeIndex()79 public int getBootstrapMethodAttributeIndex() 80 { 81 return u2bootstrapMethodAttributeIndex; 82 } 83 84 /** 85 * Returns the name-and-type index. 86 */ getNameAndTypeIndex()87 public int getNameAndTypeIndex() 88 { 89 return u2nameAndTypeIndex; 90 } 91 92 /** 93 * Returns the method name. 94 */ getName(Clazz clazz)95 public String getName(Clazz clazz) 96 { 97 return clazz.getName(u2nameAndTypeIndex); 98 } 99 100 /** 101 * Returns the method type. 102 */ getType(Clazz clazz)103 public String getType(Clazz clazz) 104 { 105 return clazz.getType(u2nameAndTypeIndex); 106 } 107 108 109 /** 110 * Lets the Clazz objects referenced in the descriptor string 111 * accept the given visitor. 112 */ referencedClassesAccept(ClassVisitor classVisitor)113 public void referencedClassesAccept(ClassVisitor classVisitor) 114 { 115 if (referencedClasses != null) 116 { 117 for (int index = 0; index < referencedClasses.length; index++) 118 { 119 if (referencedClasses[index] != null) 120 { 121 referencedClasses[index].accept(classVisitor); 122 } 123 } 124 } 125 } 126 127 128 /** 129 * Lets the bootstrap method handle constant accept the given visitor. 130 */ bootstrapMethodHandleAccept(Clazz clazz, ConstantVisitor constantVisitor)131 public void bootstrapMethodHandleAccept(Clazz clazz, ConstantVisitor constantVisitor) 132 { 133 new BootstrapMethodHandleTraveler(constantVisitor).visitInvokeDynamicConstant(clazz, this); 134 } 135 136 137 // Implementations for Constant. 138 getTag()139 public int getTag() 140 { 141 return ClassConstants.CONSTANT_InvokeDynamic; 142 } 143 accept(Clazz clazz, ConstantVisitor constantVisitor)144 public void accept(Clazz clazz, ConstantVisitor constantVisitor) 145 { 146 constantVisitor.visitInvokeDynamicConstant(clazz, this); 147 } 148 } 149