/*
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.edgent.oplet.core;

import org.apache.edgent.oplet.OpletContext;

/**
 * Union oplet, merges multiple input ports
 * into a single output port.
 * 
 * Processing for each input is identical
 * and just submits the tuple to the single output.
 * 
 * @param <T> Tuple type
 */
public final class Union<T> extends FanIn<T, T> {

    @Override
    public void start() {
    }

    
    @Override
    public void initialize(OpletContext<T, T> context) {
      super.initialize(context);
      
      // forward every tuple to the output port
      setReceiver((tuple, iportIndex) -> tuple);
    }

    @Override
    public void close() {
    }
}