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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 java.util.Map;

public interface MapAbstractState>
    extends Map,
        LatticeAbstractState> {

  // implementations for LatticeAbstractState

  @Override
  default MapAbstractState join(
      MapAbstractState abstractState) {
    if (this == abstractState) {
      return this;
    }
    MapAbstractState joinResult = abstractState.copy();
    // compute the join for the domain intersection
    forEach(
        (keyL, valueL) ->
            joinResult.compute(
                keyL, (keyR, valueR) -> valueR == null ? valueL : valueL.join(valueR)));
    if (equals(joinResult)) {
      return this;
    }
    if (abstractState.equals(joinResult)) {
      return abstractState;
    }
    return joinResult;
  }

  @Override
  default boolean isLessOrEqual(MapAbstractState abstractState) {
    if (!abstractState.keySet().containsAll(keySet())) {
      return false;
    }
    return entrySet().stream()
        .allMatch(entry -> entry.getValue().isLessOrEqual(abstractState.get(entry.getKey())));
  }

  // overloads for AbstractState

  @Override
  MapAbstractState copy();
}