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

There is a newer version: 9.1.6

/*
 * 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.visitor;

import proguard.classfile.*;

/**
 * This interface specifies the methods for a visitor of {@link ProgramMember} instances and {@link
 * LibraryMember} instances.
 *
 * @author Eric Lafortune
 */
public interface MemberVisitor {
  /**
   * Visits any Member instance. The more specific default implementations of this interface
   * delegate to this method.
   */
  default void visitAnyMember(Clazz clazz, Member member) {
    throw new UnsupportedOperationException(
        this.getClass().getName() + " does not support " + member.getClass().getName());
  }

  default void visitProgramMember(ProgramClass programClass, ProgramMember programMember) {
    visitAnyMember(programClass, programMember);
  }

  default void visitProgramField(ProgramClass programClass, ProgramField programField) {
    visitProgramMember(programClass, programField);
  }

  default void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) {
    visitProgramMember(programClass, programMethod);
  }

  default void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember) {
    visitAnyMember(libraryClass, libraryMember);
  }

  default void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField) {
    visitLibraryMember(libraryClass, libraryField);
  }

  default void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) {
    visitLibraryMember(libraryClass, libraryMethod);
  }
}