experiments/sql/src/main/java/org/apache/gearpump/sql/rel/GearUnionRel.java

/*
 * 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.gearpump.sql.rel;

import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.RelInput;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.SetOp;
import org.apache.calcite.rel.core.Union;
import org.apache.gearpump.streaming.dsl.javaapi.JavaStream;
import org.apache.gearpump.streaming.dsl.javaapi.JavaStreamApp;
import scala.Tuple2;

import java.util.List;

public class GearUnionRel extends Union implements GearRelNode {

  private GearSetOperatorRelBase delegate;

  public GearUnionRel(RelOptCluster cluster, RelTraitSet traits, List<RelNode> inputs, boolean all) {
    super(cluster, traits, inputs, all);
    this.delegate = new GearSetOperatorRelBase(this, GearSetOperatorRelBase.OpType.UNION, inputs, all);
  }

  public GearUnionRel(RelInput input) {
    super(input);
  }

  @Override
  public SetOp copy(RelTraitSet traitSet, List<RelNode> inputs, boolean all) {
    return new GearUnionRel(getCluster(), traitSet, inputs, all);
  }

  @Override
  public JavaStream<Tuple2<String, Integer>> buildGearPipeline(JavaStreamApp app, JavaStream<Tuple2<String, Integer>> javaStream) throws Exception {
    return null;
  }
}