org.apache.flink.table.planner.plan.nodes.exec.visitor.ExecNodeVisitorImpl Maven / Gradle / Ivy

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.flink.table.planner.plan.nodes.exec.visitor;

import org.apache.flink.table.planner.plan.nodes.exec.ExecNode;

/**
 * Implement of {@link ExecNodeVisitor}. An exec node may be visited multiple times if it's the
 * input of multiple nodes.
 */
public class ExecNodeVisitorImpl implements ExecNodeVisitor {

    public void visit(ExecNode node) {
        visitInputs(node);
    }

    protected void visitInputs(ExecNode node) {
        node.getInputEdges().forEach(n -> n.getSource().accept(this));
    }
}