/*
 * 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.wayang.core.test;

import org.apache.wayang.core.optimizer.OptimizationContext;
import org.apache.wayang.core.plan.executionplan.Channel;
import org.apache.wayang.core.plan.wayangplan.OutputSlot;
import org.apache.wayang.core.platform.ChannelDescriptor;
import org.apache.wayang.core.platform.ChannelInstance;
import org.apache.wayang.core.platform.Executor;

/**
 * Dummy {@link Channel}.
 */
public class DummyReusableChannel extends Channel {

    public static final ChannelDescriptor DESCRIPTOR = new ChannelDescriptor(
            DummyReusableChannel.class,
            true,
            true
    );

    public DummyReusableChannel(ChannelDescriptor descriptor, OutputSlot<?> producerSlot) {
        super(descriptor, producerSlot);
        assert DESCRIPTOR == descriptor;
    }

    public DummyReusableChannel(DummyReusableChannel dummyReusableChannel) {
        super(dummyReusableChannel);
    }

    @Override
    public Channel copy() {
        return new DummyReusableChannel(this);
    }

    @Override
    public ChannelInstance createInstance(Executor executor,
                                          OptimizationContext.OperatorContext producerOperatorContext,
                                          int producerOutputIndex) {
        throw new UnsupportedOperationException();
    }
}
