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Xsts Analysis subproject in the Theta model checking framework

There is a newer version: 6.5.2

/*
 *  Copyright 2024 Budapest University of Technology and Economics
 *
 *  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 hu.bme.mit.theta.xsts.analysis;

import hu.bme.mit.theta.analysis.Prec;
import hu.bme.mit.theta.analysis.TransFunc;
import hu.bme.mit.theta.analysis.expr.ExprState;

import java.util.ArrayList;
import java.util.Collection;

import static com.google.common.base.Preconditions.checkNotNull;

public final class XstsTransFunc implements
        TransFunc, XstsAction, P> {

    private final TransFunc transFunc;

    private XstsTransFunc(final TransFunc transFunc) {
        this.transFunc = checkNotNull(transFunc);
    }

    public static  XstsTransFunc create(
            final TransFunc transFunc) {
        return new XstsTransFunc<>(transFunc);
    }

    @Override
    public Collection> getSuccStates(final XstsState state,
                                                            final XstsAction action, final P prec) {

        checkNotNull(state);
        checkNotNull(action);
        checkNotNull(prec);

        final Collection> succStates = new ArrayList<>();
        final S subState = state.getState();
        final boolean succWasLastEnv = !state.lastActionWasEnv();

        final Collection subSuccStates = transFunc.getSuccStates(subState, action,
                prec);
        for (final S subSuccState : subSuccStates) {
            final XstsState succState = XstsState.of(subSuccState, succWasLastEnv, true);
            succStates.add(succState);
        }
        return succStates;
    }
}