/***********************************************************************************************************************
* 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.api.common.operators.util.FieldList;
import eu.stratosphere.compiler.dag.TwoInputNode;
import eu.stratosphere.compiler.dataproperties.LocalProperties;
import eu.stratosphere.compiler.dataproperties.RequestedLocalProperties;
import eu.stratosphere.compiler.plan.Channel;
import eu.stratosphere.compiler.plan.DualInputPlanNode;
import eu.stratosphere.pact.runtime.task.DriverStrategy;
public final class HashJoinBuildSecondProperties extends AbstractJoinDescriptor {
public HashJoinBuildSecondProperties(FieldList keys1, FieldList keys2) {
super(keys1, keys2);
}
@Override
public DriverStrategy getStrategy() {
return DriverStrategy.HYBRIDHASH_BUILD_SECOND;
}
@Override
protected List<LocalPropertiesPair> createPossibleLocalProperties() {
// all properties are possible
return Collections.singletonList(new LocalPropertiesPair(
new RequestedLocalProperties(), new RequestedLocalProperties()));
}
@Override
public boolean areCoFulfilled(RequestedLocalProperties requested1, RequestedLocalProperties requested2,
LocalProperties produced1, LocalProperties produced2)
{
return true;
}
@Override
public DualInputPlanNode instantiate(Channel in1, Channel in2, TwoInputNode node) {
return new DualInputPlanNode(node, "Join("+node.getPactContract().getName()+")", in1, in2, DriverStrategy.HYBRIDHASH_BUILD_SECOND, this.keys1, this.keys2);
}
@Override
public LocalProperties computeLocalProperties(LocalProperties in1, LocalProperties in2) {
return new LocalProperties();
}
}