/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2011 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.visitor;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.annotation.*;
import proguard.classfile.attribute.annotation.visitor.*;
import proguard.classfile.attribute.visitor.*;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This ClassVisitor, MemberVisitor, ConstantVisitor, AttributeVisitor, etc.
* lets a given ClassVisitor visit all the referenced classes of the elements
* that it visits. Only downstream elements are considered (in order to avoid
* loops and repeated visits).
*
* @author Eric Lafortune
*/
public class ReferencedClassVisitor
extends SimplifiedVisitor
implements ClassVisitor,
MemberVisitor,
ConstantVisitor,
AttributeVisitor,
LocalVariableInfoVisitor,
LocalVariableTypeInfoVisitor,
AnnotationVisitor,
ElementValueVisitor
{
private final ClassVisitor classVisitor;
public ReferencedClassVisitor(ClassVisitor classVisitor)
{
this.classVisitor = classVisitor;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Visit the constant pool entries.
programClass.constantPoolEntriesAccept(this);
// Visit the fields and methods.
programClass.fieldsAccept(this);
programClass.methodsAccept(this);
// Visit the attributes.
programClass.attributesAccept(this);
}
public void visitLibraryClass(LibraryClass libraryClass)
{
// Visit the superclass and interfaces.
libraryClass.superClassAccept(classVisitor);
libraryClass.interfacesAccept(classVisitor);
// Visit the fields and methods.
libraryClass.fieldsAccept(this);
libraryClass.methodsAccept(this);
}
// Implementations for MemberVisitor.
public void visitProgramMember(ProgramClass programClass, ProgramMember programMember)
{
// Let the visitor visit the classes referenced in the descriptor string.
programMember.referencedClassesAccept(classVisitor);
// Visit the attributes.
programMember.attributesAccept(programClass, this);
}
public void visitLibraryMember(LibraryClass programClass, LibraryMember libraryMember)
{
// Let the visitor visit the classes referenced in the descriptor string.
libraryMember.referencedClassesAccept(classVisitor);
}
// Implementations for ConstantVisitor.
public void visitAnyConstant(Clazz clazz, Constant constant) {}
public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
{
// Let the visitor visit the class referenced in the string constant.
stringConstant.referencedClassAccept(classVisitor);
}
public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant)
{
// Let the visitor visit the class referenced in the reference constant.
refConstant.referencedClassAccept(classVisitor);
}
public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
{
// Let the visitor visit the class referenced in the reference constant.
invokeDynamicConstant.referencedClassesAccept(classVisitor);
}
public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
{
// Let the visitor visit the class referenced in the class constant.
classConstant.referencedClassAccept(classVisitor);
}
// Implementations for AttributeVisitor.
public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
public void visitEnclosingMethodAttribute(Clazz clazz, EnclosingMethodAttribute enclosingMethodAttribute)
{
// Let the visitor visit the class of the enclosing method.
enclosingMethodAttribute.referencedClassAccept(classVisitor);
}
public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
{
// Visit the attributes of the code attribute.
codeAttribute.attributesAccept(clazz, method, this);
}
public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
{
// Visit the local variables.
localVariableTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this);
}
public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
{
// Visit the local variable types.
localVariableTypeTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this);
}
public void visitSignatureAttribute(Clazz clazz, SignatureAttribute signatureAttribute)
{
// Let the visitor visit the classes referenced in the signature string.
signatureAttribute.referencedClassesAccept(classVisitor);
}
public void visitAnyAnnotationsAttribute(Clazz clazz, AnnotationsAttribute annotationsAttribute)
{
// Visit the annotations.
annotationsAttribute.annotationsAccept(clazz, this);
}
public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
{
// Visit the parameter annotations.
parameterAnnotationsAttribute.annotationsAccept(clazz, method, this);
}
public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute)
{
// Visit the default element value.
annotationDefaultAttribute.defaultValueAccept(clazz, this);
}
// Implementations for LocalVariableInfoVisitor.
public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)
{
// Let the visitor visit the class referenced in the local variable.
localVariableInfo.referencedClassAccept(classVisitor);
}
// Implementations for LocalVariableTypeInfoVisitor.
public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
{
// Let the visitor visit the classes referenced in the local variable type.
localVariableTypeInfo.referencedClassesAccept(classVisitor);
}
// Implementations for AnnotationVisitor.
public void visitAnnotation(Clazz clazz, Annotation annotation)
{
// Let the visitor visit the classes referenced in the annotation.
annotation.referencedClassesAccept(classVisitor);
// Visit the element values.
annotation.elementValuesAccept(clazz, this);
}
// Implementations for ElementValueVisitor.
public void visitAnyElementValue(Clazz clazz, Annotation annotation, ElementValue elementValue) {}
public void visitEnumConstantElementValue(Clazz clazz, Annotation annotation, EnumConstantElementValue enumConstantElementValue)
{
// Let the visitor visit the classes referenced in the constant element value.
enumConstantElementValue.referencedClassesAccept(classVisitor);
}
public void visitClassElementValue(Clazz clazz, Annotation annotation, ClassElementValue classElementValue)
{
// Let the visitor visit the classes referenced in the class element value.
classElementValue.referencedClassesAccept(classVisitor);
}
public void visitArrayElementValue(Clazz clazz, Annotation annotation, ArrayElementValue arrayElementValue)
{
// Visit the element values.
arrayElementValue.elementValuesAccept(clazz, annotation, this);
}
}