proguard.classfile.editor.NamedAttributeDeleter Maven / Gradle / Ivy

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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.7

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package proguard.classfile.editor;

import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.visitor.*;


/**
 * This {@link ClassVisitor} deletes attributes with a given name in the program
 * classes, fields, methods, or code attributes that it visits.
 *
 * @author Eric Lafortune
 */
public class NamedAttributeDeleter
implements   ClassVisitor,
             MemberVisitor,
             AttributeVisitor
{
    private final String attributeName;


    public NamedAttributeDeleter(String attributeName)
    {
        this.attributeName = attributeName;
    }


    // Implementations for ClassVisitor.

    @Override
    public void visitAnyClass(Clazz clazz) { }


    @Override
    public void visitProgramClass(ProgramClass programClass)
    {
        new AttributesEditor(programClass, false).deleteAttribute(attributeName);
    }


    // Implementations for MemberVisitor.

    public void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember) {}


    public void visitProgramMember(ProgramClass programClass, ProgramMember programMember)
    {
        new AttributesEditor(programClass, programMember, false).deleteAttribute(attributeName);
    }


    // Implementations for AttributeVisitor.

    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}


    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
    {
        new AttributesEditor((ProgramClass)clazz, (ProgramMember)method, codeAttribute, false).deleteAttribute(attributeName);
    }
}