TreeTraverseCallback.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.kie.workbench.common.stunner.core.graph.processing.traverse.tree;

import org.kie.workbench.common.stunner.core.graph.Edge;
import org.kie.workbench.common.stunner.core.graph.Graph;
import org.kie.workbench.common.stunner.core.graph.Node;

public interface TreeTraverseCallback<G extends Graph, N extends Node, E extends Edge> {

    void startGraphTraversal(final G graph);

    boolean startNodeTraversal(final N node);

    boolean startEdgeTraversal(final E edge);

    void endNodeTraversal(final N node);

    void endEdgeTraversal(final E edge);

    void endGraphTraversal();
}