org.sosy_lab.cpachecker.core.reachedset.UnmodifiableReachedSetView.java Source code

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Here is the source code for org.sosy_lab.cpachecker.core.reachedset.UnmodifiableReachedSetView.java

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/*
 *  CPAchecker is a tool for configurable software verification.
 *  This file is part of CPAchecker.
 *
 *  Copyright (C) 2007-2014  Dirk Beyer
 *  All rights reserved.
 *
 *  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.
 *
 *
 *  CPAchecker web page:
 *    http://cpachecker.sosy-lab.org
 */
package org.sosy_lab.cpachecker.core.reachedset;

import java.util.Collection;
import java.util.Iterator;

import org.sosy_lab.cpachecker.cfa.model.CFANode;
import org.sosy_lab.cpachecker.core.interfaces.AbstractState;
import org.sosy_lab.cpachecker.core.interfaces.Precision;

import com.google.common.base.Function;
import com.google.common.collect.Collections2;
import com.google.common.collect.Iterators;

/**
 * Live view of an unmodifiable reached state set, where states
 * and precision are transformed by mapping functions.
 */
public class UnmodifiableReachedSetView implements UnmodifiableReachedSet {
    private final UnmodifiableReachedSet underlying;
    private final Function<? super AbstractState, AbstractState> mapStateFunction;
    private final Function<? super Precision, Precision> mapPrecisionFunction;

    public UnmodifiableReachedSetView(UnmodifiableReachedSet pUnderlyingSet,
            Function<? super AbstractState, AbstractState> pMapStateFunction,
            Function<? super Precision, Precision> pMapPrecisionFunction) {
        assert pUnderlyingSet != null;
        assert pMapStateFunction != null;
        assert pMapPrecisionFunction != null;

        underlying = pUnderlyingSet;
        mapStateFunction = pMapStateFunction;
        mapPrecisionFunction = pMapPrecisionFunction;
    }

    @Override
    public AbstractState getFirstState() {
        return mapStateFunction.apply(underlying.getFirstState());
    }

    @Override
    public AbstractState getLastState() {
        return mapStateFunction.apply(underlying.getLastState());
    }

    @Override
    public Precision getPrecision(AbstractState pState) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("Unwrapping prevents reverse mapping");
    }

    @Override
    public Collection<AbstractState> asCollection() {
        return Collections2.transform(underlying.asCollection(), mapStateFunction);
    }

    @Override
    public Collection<AbstractState> getReached(AbstractState pState) throws UnsupportedOperationException {
        throw new UnsupportedOperationException("Unwrapping may prevent to know the location");
    }

    @Override
    public Collection<AbstractState> getReached(CFANode pLocation) {
        return Collections2.transform(underlying.getReached(pLocation), mapStateFunction);
    }

    @Override
    public Collection<Precision> getPrecisions() {
        return Collections2.transform(underlying.getPrecisions(), mapPrecisionFunction);
    }

    @Override
    public Collection<AbstractState> getWaitlist() {
        return Collections2.transform(underlying.getWaitlist(), mapStateFunction);
    }

    @Override
    public int getWaitlistSize() {
        return underlying.getWaitlistSize();
    }

    @Override
    public boolean hasWaitingState() {
        return underlying.hasWaitingState();
    }

    @Override
    public Iterator<AbstractState> iterator() {
        return Iterators.transform(underlying.iterator(), mapStateFunction);
    }

    @Override
    public boolean contains(AbstractState pState) {
        throw new UnsupportedOperationException("Unwrapping may prevent to check contains");
    }

    @Override
    public boolean isEmpty() {
        return underlying.isEmpty();
    }

    @Override
    public int size() {
        return underlying.size();
    }

}