/***********************************************************************************************************************
* 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.ArrayList;
import java.util.Collections;
import java.util.List;
import eu.stratosphere.compiler.dag.TwoInputNode;
import eu.stratosphere.compiler.dataproperties.GlobalProperties;
import eu.stratosphere.compiler.dataproperties.LocalProperties;
import eu.stratosphere.compiler.dataproperties.PartitioningProperty;
import eu.stratosphere.compiler.dataproperties.RequestedGlobalProperties;
import eu.stratosphere.compiler.dataproperties.RequestedLocalProperties;
import eu.stratosphere.compiler.plan.Channel;
import eu.stratosphere.compiler.plan.DualInputPlanNode;
public abstract class CartesianProductDescriptor extends OperatorDescriptorDual {
private final boolean allowBroadcastFirst;
private final boolean allowBroadcastSecond;
protected CartesianProductDescriptor(boolean allowBroadcastFirst, boolean allowBroadcastSecond) {
if (!(allowBroadcastFirst | allowBroadcastSecond)) {
throw new IllegalArgumentException();
}
this.allowBroadcastFirst = allowBroadcastFirst;
this.allowBroadcastSecond = allowBroadcastSecond;
}
@Override
protected List<GlobalPropertiesPair> createPossibleGlobalProperties() {
ArrayList<GlobalPropertiesPair> pairs = new ArrayList<GlobalPropertiesPair>();
if (this.allowBroadcastFirst) {
// replicate first
RequestedGlobalProperties replicated1 = new RequestedGlobalProperties();
replicated1.setFullyReplicated();
RequestedGlobalProperties any2 = new RequestedGlobalProperties();
pairs.add(new GlobalPropertiesPair(replicated1, any2));
}
if (this.allowBroadcastSecond) {
// replicate second
RequestedGlobalProperties any1 = new RequestedGlobalProperties();
RequestedGlobalProperties replicated2 = new RequestedGlobalProperties();
replicated2.setFullyReplicated();
pairs.add(new GlobalPropertiesPair(any1, replicated2));
}
return pairs;
}
@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, "Cross("+node.getPactContract().getName()+")", in1, in2, getStrategy());
}
@Override
public GlobalProperties computeGlobalProperties(GlobalProperties in1, GlobalProperties in2) {
GlobalProperties gp = GlobalProperties.combine(in1, in2);
if (gp.getUniqueFieldCombination() != null && gp.getUniqueFieldCombination().size() > 0 &&
gp.getPartitioning() == PartitioningProperty.RANDOM)
{
gp.setAnyPartitioning(gp.getUniqueFieldCombination().iterator().next().toFieldList());
}
gp.clearUniqueFieldCombinations();
return gp;
}
}