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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) 2002-2022 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.analysis.cpa.defaults;

import proguard.analysis.cpa.interfaces.AbstractDomain;
import proguard.analysis.cpa.interfaces.AbstractState;
import proguard.analysis.cpa.interfaces.MergeOperator;
import proguard.analysis.cpa.interfaces.Precision;

/**
 * This {@link MergeOperator} applies the join operator to its arguments.
 *
 * @author Dmitry Ivanov
 */
public final class MergeJoinOperator implements MergeOperator {
  private final AbstractDomain abstractDomain;

  /**
   * Create a merge operator from an abstract domain defining the join operator.
   *
   * @param abstractDomain abstract domain
   */
  public MergeJoinOperator(AbstractDomain abstractDomain) {
    this.abstractDomain = abstractDomain;
  }

  // implementations for MergeOperator

  @Override
  public AbstractState merge(
      AbstractState abstractState1, AbstractState abstractState2, Precision precision) {
    return abstractDomain.join(abstractState1, abstractState2);
  }
}