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      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2014 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.attribute.annotation.visitor;
     22 
     23 import proguard.classfile.*;
     24 import proguard.classfile.attribute.*;
     25 import proguard.classfile.attribute.annotation.*;
     26 import proguard.classfile.attribute.visitor.AttributeVisitor;
     27 import proguard.classfile.util.SimplifiedVisitor;
     28 
     29 /**
     30  * This AttributeVisitor and AnnotationVisitor lets a given ElementValueVisitor
     31  * visit all ElementValue objects of the attributes or annotations that it
     32  * visits.
     33  *
     34  * @author Eric Lafortune
     35  */
     36 public class AllElementValueVisitor
     37 extends      SimplifiedVisitor
     38 implements   AttributeVisitor,
     39              AnnotationVisitor,
     40              ElementValueVisitor
     41 {
     42     private final boolean             deep;
     43     private final ElementValueVisitor elementValueVisitor;
     44 
     45 
     46     /**
     47      * Creates a new AllElementValueVisitor.
     48      * @param elementValueVisitor the AllElementValueVisitor to which visits
     49      *                            will be delegated.
     50      */
     51     public AllElementValueVisitor(ElementValueVisitor elementValueVisitor)
     52     {
     53         this(false, elementValueVisitor);
     54     }
     55 
     56 
     57     /**
     58      * Creates a new AllElementValueVisitor.
     59      * @param deep                specifies whether the element values
     60      *                            further down the hierarchy should be
     61      *                            visited too.
     62      * @param elementValueVisitor the AllElementValueVisitor to which visits
     63      *                            will be delegated.
     64      */
     65     public AllElementValueVisitor(boolean             deep,
     66                                   ElementValueVisitor elementValueVisitor)
     67     {
     68         this.deep                = deep;
     69         this.elementValueVisitor = elementValueVisitor;
     70     }
     71 
     72 
     73     // Implementations for AttributeVisitor.
     74 
     75     public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
     76 
     77 
     78     public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute)
     79     {
     80         // Visit the annotations.
     81         runtimeVisibleAnnotationsAttribute.annotationsAccept(clazz, this);
     82     }
     83 
     84 
     85     public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute)
     86     {
     87         // Visit the annotations.
     88         runtimeVisibleAnnotationsAttribute.annotationsAccept(clazz, field, this);
     89     }
     90 
     91 
     92     public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute)
     93     {
     94         // Visit the annotations.
     95         runtimeVisibleAnnotationsAttribute.annotationsAccept(clazz, method, this);
     96     }
     97 
     98 
     99     public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute)
    100     {
    101         // Visit the annotations.
    102         runtimeInvisibleAnnotationsAttribute.annotationsAccept(clazz, this);
    103     }
    104 
    105 
    106     public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute)
    107     {
    108         // Visit the annotations.
    109         runtimeInvisibleAnnotationsAttribute.annotationsAccept(clazz, field, this);
    110     }
    111 
    112 
    113     public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute)
    114     {
    115         // Visit the annotations.
    116         runtimeInvisibleAnnotationsAttribute.annotationsAccept(clazz, method, this);
    117     }
    118 
    119 
    120     public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
    121     {
    122         // Visit the annotations.
    123         parameterAnnotationsAttribute.annotationsAccept(clazz, method, this);
    124     }
    125 
    126 
    127     public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute)
    128     {
    129         // Visit the default element value.
    130         annotationDefaultAttribute.defaultValueAccept(clazz, this);
    131     }
    132 
    133 
    134     // Implementations for AnnotationVisitor.
    135 
    136     public void visitAnnotation(Clazz clazz, Annotation annotation)
    137     {
    138         annotation.elementValuesAccept(clazz, this);
    139     }
    140 
    141 
    142     public void visitAnnotation(Clazz clazz, Field field, Annotation annotation)
    143     {
    144         annotation.elementValuesAccept(clazz, this);
    145     }
    146 
    147 
    148     public void visitAnnotation(Clazz clazz, Method method, Annotation annotation)
    149     {
    150         annotation.elementValuesAccept(clazz, this);
    151     }
    152 
    153 
    154     public void visitAnnotation(Clazz clazz, Method method, int parameterIndex, Annotation annotation)
    155     {
    156         annotation.elementValuesAccept(clazz, this);
    157     }
    158 
    159 
    160     public void visitAnnotation(Clazz clazz, Method method, CodeAttribute codeAttribute, Annotation annotation)
    161     {
    162         annotation.elementValuesAccept(clazz, this);
    163     }
    164 
    165 
    166     // Implementations for ElementValueVisitor.
    167 
    168     public void visitConstantElementValue(Clazz clazz, Annotation annotation, ConstantElementValue constantElementValue)
    169     {
    170         elementValueVisitor.visitConstantElementValue(clazz, annotation, constantElementValue);
    171     }
    172 
    173 
    174     public void visitEnumConstantElementValue(Clazz clazz, Annotation annotation, EnumConstantElementValue enumConstantElementValue)
    175     {
    176         elementValueVisitor.visitEnumConstantElementValue(clazz, annotation, enumConstantElementValue);
    177     }
    178 
    179 
    180     public void visitClassElementValue(Clazz clazz, Annotation annotation, ClassElementValue classElementValue)
    181     {
    182         elementValueVisitor.visitClassElementValue(clazz, annotation, classElementValue);
    183     }
    184 
    185 
    186     public void visitAnnotationElementValue(Clazz clazz, Annotation annotation, AnnotationElementValue annotationElementValue)
    187     {
    188         elementValueVisitor.visitAnnotationElementValue(clazz, annotation, annotationElementValue);
    189 
    190         if (deep)
    191         {
    192             annotationElementValue.annotationAccept(clazz, this);
    193         }
    194     }
    195 
    196 
    197     public void visitArrayElementValue(Clazz clazz, Annotation annotation, ArrayElementValue arrayElementValue)
    198     {
    199         elementValueVisitor.visitArrayElementValue(clazz, annotation, arrayElementValue);
    200 
    201         if (deep)
    202         {
    203             arrayElementValue.elementValuesAccept(clazz, annotation, elementValueVisitor);
    204         }
    205     }
    206 }
    207