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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.*;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.util.ArrayUtil;

/**
 * This {@link ConstantVisitor} delegates all visits to each {@link ConstantVisitor} in a given
 * list.
 *
 * @author Johan Leys
 */
public class MultiConstantVisitor implements ConstantVisitor {
  private ConstantVisitor[] constantVisitors;
  private int constantVisitorCount;

  public MultiConstantVisitor() {
    this.constantVisitors = new ConstantVisitor[16];
  }

  public MultiConstantVisitor(ConstantVisitor... constantVisitors) {
    this.constantVisitors = constantVisitors;
    this.constantVisitorCount = this.constantVisitors.length;
  }

  public void addClassVisitor(ConstantVisitor constantVisitor) {
    constantVisitors = ArrayUtil.add(constantVisitors, constantVisitorCount++, constantVisitor);
  }

  // Implementations for ConstantVisitor.

  public void visitAnyConstant(Clazz clazz, Constant constant) {
    for (int index = 0; index < constantVisitorCount; index++) {
      constant.accept(clazz, constantVisitors[index]);
    }
  }
}