org.sosy_lab.cpachecker.cfa.blocks.Block.java Source code

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Here is the source code for org.sosy_lab.cpachecker.cfa.blocks.Block.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.cfa.blocks;

import java.util.Collections;
import java.util.Set;

import org.sosy_lab.cpachecker.cfa.model.CFANode;

import com.google.common.collect.ImmutableSet;

/**
 * Represents a block as described in the BAM paper.
 */
public class Block {

    private final ImmutableSet<ReferencedVariable> referencedVariables;
    private final ImmutableSet<CFANode> callNodes;
    private final ImmutableSet<CFANode> returnNodes;
    private final ImmutableSet<CFANode> nodes;

    public Block(Set<ReferencedVariable> pReferencedVariables, Set<CFANode> pCallNodes, Set<CFANode> pReturnNodes,
            Set<CFANode> allNodes) {

        referencedVariables = ImmutableSet.copyOf(pReferencedVariables);
        callNodes = ImmutableSet.copyOf(pCallNodes);
        returnNodes = ImmutableSet.copyOf(pReturnNodes);
        nodes = ImmutableSet.copyOf(allNodes);
    }

    public Set<CFANode> getCallNodes() {
        return Collections.unmodifiableSet(callNodes);
    }

    public CFANode getCallNode() {
        assert callNodes.size() == 1;
        return callNodes.iterator().next();
    }

    public Set<ReferencedVariable> getReferencedVariables() {
        return referencedVariables;
    }

    public Set<CFANode> getNodes() {
        return nodes;
    }

    public boolean isReturnNode(CFANode pNode) {
        return returnNodes.contains(pNode);
    }

    public Set<CFANode> getReturnNodes() {
        return returnNodes;
    }

    public boolean isCallNode(CFANode pNode) {
        return callNodes.contains(pNode);
    }

    @Override
    public String toString() {
        return "Block " + "(CallNodes: " + callNodes + ") " + "(Nodes: "
                + (nodes.size() < 10 ? nodes : "[#=" + nodes.size() + "]") + ") " + "(ReturnNodes: " + returnNodes
                + ")";
    }
}