1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 Eric Lafortune (eric (at) 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.editor; 22 23 import proguard.classfile.*; 24 import proguard.classfile.attribute.annotation.*; 25 import proguard.classfile.attribute.annotation.visitor.AnnotationVisitor; 26 import proguard.classfile.util.SimplifiedVisitor; 27 28 /** 29 * This AnnotationVisitor adds all annotations that it visits to the given 30 * target annotation element value, target annotation attribute, or target 31 * parameter annotation attribute. 32 * 33 * @author Eric Lafortune 34 */ 35 public class AnnotationAdder 36 extends SimplifiedVisitor 37 implements AnnotationVisitor 38 { 39 private static final ElementValue[] EMPTY_ELEMENT_VALUES = new ElementValue[0]; 40 41 42 private final ProgramClass targetClass; 43 private final AnnotationElementValue targetAnnotationElementValue; 44 private final AnnotationsAttributeEditor annotationsAttributeEditor; 45 private final ParameterAnnotationsAttributeEditor parameterAnnotationsAttributeEditor; 46 47 private final ConstantAdder constantAdder; 48 49 50 /** 51 * Creates a new AnnotationAdder that will copy annotations into the given 52 * target annotation element value. 53 */ 54 public AnnotationAdder(ProgramClass targetClass, 55 AnnotationElementValue targetAnnotationElementValue) 56 { 57 this.targetClass = targetClass; 58 this.targetAnnotationElementValue = targetAnnotationElementValue; 59 this.annotationsAttributeEditor = null; 60 this.parameterAnnotationsAttributeEditor = null; 61 62 constantAdder = new ConstantAdder(targetClass); 63 } 64 65 66 /** 67 * Creates a new AnnotationAdder that will copy annotations into the given 68 * target annotations attribute. 69 */ 70 public AnnotationAdder(ProgramClass targetClass, 71 AnnotationsAttribute targetAnnotationsAttribute) 72 { 73 this.targetClass = targetClass; 74 this.targetAnnotationElementValue = null; 75 this.annotationsAttributeEditor = new AnnotationsAttributeEditor(targetAnnotationsAttribute); 76 this.parameterAnnotationsAttributeEditor = null; 77 78 constantAdder = new ConstantAdder(targetClass); 79 } 80 81 82 /** 83 * Creates a new AnnotationAdder that will copy annotations into the given 84 * target parameter annotations attribute. 85 */ 86 public AnnotationAdder(ProgramClass targetClass, 87 ParameterAnnotationsAttribute targetParameterAnnotationsAttribute) 88 { 89 this.targetClass = targetClass; 90 this.targetAnnotationElementValue = null; 91 this.annotationsAttributeEditor = null; 92 this.parameterAnnotationsAttributeEditor = new ParameterAnnotationsAttributeEditor(targetParameterAnnotationsAttribute); 93 94 constantAdder = new ConstantAdder(targetClass); 95 } 96 97 98 // Implementations for AnnotationVisitor. 99 100 public void visitAnnotation(Clazz clazz, Annotation annotation) 101 { 102 Annotation newAnnotation = 103 new Annotation(constantAdder.addConstant(clazz, annotation.u2typeIndex), 104 0, 105 annotation.u2elementValuesCount > 0 ? 106 new ElementValue[annotation.u2elementValuesCount] : 107 EMPTY_ELEMENT_VALUES); 108 109 // TODO: Clone array. 110 newAnnotation.referencedClasses = annotation.referencedClasses; 111 112 // Add the element values. 113 annotation.elementValuesAccept(clazz, 114 new ElementValueAdder(targetClass, 115 newAnnotation, 116 false)); 117 118 // What's the target? 119 if (targetAnnotationElementValue != null) 120 { 121 // Simply set the completed annotation. 122 targetAnnotationElementValue.annotationValue = newAnnotation; 123 } 124 else 125 { 126 // Add the completed annotation. 127 annotationsAttributeEditor.addAnnotation(newAnnotation); 128 } 129 } 130 131 132 public void visitAnnotation(Clazz clazz, Method method, int parameterIndex, Annotation annotation) 133 { 134 Annotation newAnnotation = 135 new Annotation(constantAdder.addConstant(clazz, annotation.u2typeIndex), 136 0, 137 annotation.u2elementValuesCount > 0 ? 138 new ElementValue[annotation.u2elementValuesCount] : 139 EMPTY_ELEMENT_VALUES); 140 141 // TODO: Clone array. 142 newAnnotation.referencedClasses = annotation.referencedClasses; 143 144 // Add the element values. 145 annotation.elementValuesAccept(clazz, 146 new ElementValueAdder(targetClass, 147 newAnnotation, 148 false)); 149 150 // Add the completed annotation. 151 parameterAnnotationsAttributeEditor.addAnnotation(parameterIndex, newAnnotation); 152 } 153 }