/***********************************************************************************************************************
* 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.dag;
import java.util.Collections;
import java.util.List;
import eu.stratosphere.api.common.operators.base.BulkIterationBase.PartialSolutionPlaceHolder;
import eu.stratosphere.compiler.DataStatistics;
import eu.stratosphere.compiler.dataproperties.GlobalProperties;
import eu.stratosphere.compiler.dataproperties.LocalProperties;
import eu.stratosphere.compiler.plan.BulkPartialSolutionPlanNode;
import eu.stratosphere.compiler.plan.Channel;
import eu.stratosphere.compiler.plan.PlanNode;
/**
* The optimizer's internal representation of the partial solution that is input to a bulk iteration.
*/
public class BulkPartialSolutionNode extends AbstractPartialSolutionNode {
private final BulkIterationNode iterationNode;
public BulkPartialSolutionNode(PartialSolutionPlaceHolder<?> psph, BulkIterationNode iterationNode) {
super(psph);
this.iterationNode = iterationNode;
}
// --------------------------------------------------------------------------------------------
public void setCandidateProperties(GlobalProperties gProps, LocalProperties lProps, Channel initialInput) {
if (this.cachedPlans != null) {
throw new IllegalStateException();
} else {
this.cachedPlans = Collections.<PlanNode>singletonList(new BulkPartialSolutionPlanNode(this, "BulkPartialSolution("+this.getPactContract().getName()+")", gProps, lProps, initialInput));
}
}
public BulkPartialSolutionPlanNode getCurrentPartialSolutionPlanNode() {
if (this.cachedPlans != null) {
return (BulkPartialSolutionPlanNode) this.cachedPlans.get(0);
} else {
throw new IllegalStateException();
}
}
public BulkIterationNode getIterationNode() {
return this.iterationNode;
}
@Override
public void computeOutputEstimates(DataStatistics statistics) {
copyEstimates(this.iterationNode.getPredecessorNode());
}
// --------------------------------------------------------------------------------------------
/**
* Gets the contract object for this data source node.
*
* @return The contract.
*/
@Override
public PartialSolutionPlaceHolder<?> getPactContract() {
return (PartialSolutionPlaceHolder<?>) super.getPactContract();
}
@Override
public String getName() {
return "Bulk Partial Solution";
}
@Override
public void computeUnclosedBranchStack() {
if (this.openBranches != null) {
return;
}
OptimizerNode inputToIteration = this.iterationNode.getPredecessorNode();
addClosedBranches(inputToIteration.closedBranchingNodes);
List<UnclosedBranchDescriptor> fromInput = inputToIteration.getBranchesForParent(this.iterationNode.getIncomingConnection());
this.openBranches = (fromInput == null || fromInput.isEmpty()) ? Collections.<UnclosedBranchDescriptor>emptyList() : fromInput;
}
}