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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.util;

import proguard.classfile.*;
import proguard.classfile.attribute.Attribute;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.constant.Constant;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.visitor.*;
import proguard.resources.file.ResourceFile;
import proguard.resources.file.visitor.ResourceFileVisitor;

/** This interface defines visitor methods for the main Processable implementations. */
public interface ProcessableVisitor
    extends ClassVisitor, MemberVisitor, AttributeVisitor, ResourceFileVisitor, ConstantVisitor {
  /**
   * Visits any Processable instance. The more specific default implementations of this interface
   * delegate to this method.
   */
  default void visitAnyProcessable(Processable processable) {
    throw new UnsupportedOperationException(
        this.getClass().getName() + " does not support " + processable.getClass().getName());
  }

  // Implementations for ClassVisitor.

  default void visitAnyClass(Clazz clazz) {
    visitAnyProcessable(clazz);
  }

  // Implementations for MemberVisitor.

  default void visitAnyMember(Clazz clazz, Member member) {
    visitAnyProcessable(member);
  }

  // Implementations for AttributeVisitor.

  default void visitAnyAttribute(Clazz clazz, Attribute attribute) {
    visitAnyProcessable(attribute);
  }

  // Implementations for ResourceFileVisitor.

  default void visitAnyResourceFile(ResourceFile resourceFile) {
    visitAnyProcessable(resourceFile);
  }

  // Implementations for ConstantVisitor.

  default void visitAnyConstant(Clazz clazz, Constant constant) {
    visitAnyProcessable(constant);
  }
}