/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.compiler.operators;
import java.util.Collections;
import java.util.List;
import eu.stratosphere.compiler.dag.SingleInputNode;
import eu.stratosphere.compiler.dataproperties.GlobalProperties;
import eu.stratosphere.compiler.dataproperties.LocalProperties;
import eu.stratosphere.compiler.dataproperties.RequestedGlobalProperties;
import eu.stratosphere.compiler.dataproperties.RequestedLocalProperties;
import eu.stratosphere.compiler.plan.Channel;
import eu.stratosphere.compiler.plan.SingleInputPlanNode;
import eu.stratosphere.pact.runtime.task.DriverStrategy;
public class MapDescriptor extends OperatorDescriptorSingle {
@Override
public DriverStrategy getStrategy() {
return DriverStrategy.MAP;
}
@Override
public SingleInputPlanNode instantiate(Channel in, SingleInputNode node) {
return new SingleInputPlanNode(node, "Map ("+node.getPactContract().getName()+")", in, DriverStrategy.MAP);
}
@Override
protected List<RequestedGlobalProperties> createPossibleGlobalProperties() {
return Collections.singletonList(new RequestedGlobalProperties());
}
@Override
protected List<RequestedLocalProperties> createPossibleLocalProperties() {
return Collections.singletonList(new RequestedLocalProperties());
}
@Override
public GlobalProperties computeGlobalProperties(GlobalProperties gProps) {
return gProps;
}
@Override
public LocalProperties computeLocalProperties(LocalProperties lProps) {
return lProps;
}
}