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

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/*
 * 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;

/**
 * This delegator passes all the {@link AbstractDomain} operators to the {@link
 * LatticeAbstractState}. Thus, we can keep the CPA algorithm generic without having to cast types
 * in the domain specific code. Abstract domains defined with {@link LatticeAbstractState} should be
 * passed as {@link DelegateAbstractDomain}s to the CPA algorithm.
 *
 * @author Dmitry Ivanov
 */
public class DelegateAbstractDomain
    implements AbstractDomain {

  // implementations for AbstractDomain

  @Override
  public AbstractState join(AbstractState abstractState1, AbstractState abstractState2) {
    return ((LatticeAbstractStateT) abstractState1).join((LatticeAbstractStateT) abstractState2);
  }

  @Override
  public boolean isLessOrEqual(AbstractState abstractState1, AbstractState abstractState2) {
    return ((LatticeAbstractStateT) abstractState1)
        .isLessOrEqual((LatticeAbstractStateT) abstractState2);
  }
}