org.apache.flink.optimizer.dag.SolutionSetNode Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.flink.optimizer.dag;
import java.util.Collections;
import java.util.List;
import org.apache.flink.api.common.operators.base.DeltaIterationBase.SolutionSetPlaceHolder;
import org.apache.flink.optimizer.DataStatistics;
import org.apache.flink.optimizer.dataproperties.GlobalProperties;
import org.apache.flink.optimizer.dataproperties.LocalProperties;
import org.apache.flink.optimizer.plan.Channel;
import org.apache.flink.optimizer.plan.PlanNode;
import org.apache.flink.optimizer.plan.SolutionSetPlanNode;
/**
* The optimizer's internal representation of the solution set of a workset iteration.
*/
public class SolutionSetNode extends AbstractPartialSolutionNode {
private final WorksetIterationNode iterationNode;
public SolutionSetNode(SolutionSetPlaceHolder psph, WorksetIterationNode iterationNode) {
super(psph);
this.iterationNode = iterationNode;
}
// --------------------------------------------------------------------------------------------
public void setCandidateProperties(GlobalProperties gProps, LocalProperties lProps, Channel initialInput) {
this.cachedPlans = Collections.singletonList(new SolutionSetPlanNode(this, "SolutionSet("+this.getOperator().getName()+")", gProps, lProps, initialInput));
}
public SolutionSetPlanNode getCurrentSolutionSetPlanNode() {
if (this.cachedPlans != null) {
return (SolutionSetPlanNode) this.cachedPlans.get(0);
} else {
throw new IllegalStateException();
}
}
public WorksetIterationNode getIterationNode() {
return this.iterationNode;
}
@Override
public void computeOutputEstimates(DataStatistics statistics) {
copyEstimates(this.iterationNode.getInitialSolutionSetPredecessorNode());
}
// --------------------------------------------------------------------------------------------
/**
* Gets the contract object for this data source node.
*
* @return The contract.
*/
@Override
public SolutionSetPlaceHolder getOperator() {
return (SolutionSetPlaceHolder) super.getOperator();
}
@Override
public String getOperatorName() {
return "Solution Set";
}
@Override
public void computeUnclosedBranchStack() {
if (this.openBranches != null) {
return;
}
DagConnection solutionSetInput = this.iterationNode.getFirstIncomingConnection();
OptimizerNode solutionSetSource = solutionSetInput.getSource();
addClosedBranches(solutionSetSource.closedBranchingNodes);
List fromInput = solutionSetSource.getBranchesForParent(solutionSetInput);
this.openBranches = (fromInput == null || fromInput.isEmpty()) ? Collections.emptyList() : fromInput;
}
}