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/*
 * Fabric3
 * Copyright (c) 2009-2015 Metaform Systems
 *
 * 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.
 * Portions originally based on Apache Tuscany 2007
 * licensed under the Apache 2.0 license.
 */
package org.fabric3.util.graph;

/**
 * Walks the graph until the specified vertex is reached.
 */

public class TerminatingVisitor implements Visitor {
    private Vertex stopVertex;
    private boolean found;

    /**
     * Constructor.
     *
     * @param vertex vertex to stop at
     */
    public TerminatingVisitor(Vertex vertex) {
        this.stopVertex = vertex;
    }

    /**
     * Returns true if the specified vertex was reached during the traversal.
     *
     * @return true if the specified vertex was reached during the traversal
     */
    public boolean wasFound() {
        return found;
    }

    public boolean visit(Vertex vertex) {
        if (vertex == stopVertex) {
            found = true;
            return false;
        } else {
            return true;
        }
    }

}