org.modeshape.graph.query.process
Class DistinctComponent

java.lang.Object
  org.modeshape.graph.query.process.ProcessingComponent
      org.modeshape.graph.query.process.DelegatingComponent
          org.modeshape.graph.query.process.DistinctComponent

public class DistinctComponent
extends DelegatingComponent

A ProcessingComponent implementation that removes duplicates. The results from the delegate component do not need to be sorted; in fact, if the delegate component is a SortValuesComponent, then use DistinctOfSortedComponent instead of this class.

Nested Class Summary

Nested classes/interfaces inherited from class org.modeshape.graph.query.process.ProcessingComponent

ProcessingComponent.DynamicOperation

Constructor Summary

DistinctComponent(ProcessingComponent delegate)

Method Summary

List<Object[]>

execute() Execute this stage of processing and return the resulting tuples that each conform to the columns.

Methods inherited from class org.modeshape.graph.query.process.DelegatingComponent

close, delegate

Methods inherited from class org.modeshape.graph.query.process.ProcessingComponent

createDynamicOperation, createSortComparator, emptyTuples, getColumns, getContext, problems

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DistinctComponent

public DistinctComponent(ProcessingComponent delegate)

Method Detail

execute

public List<Object[]> execute()

Execute this stage of processing and return the resulting tuples that each conform to the columns.

Specified by:

execute in class ProcessingComponent

Returns:

the list of tuples, where each tuple corresonds to the columns; never null

See Also:

ProcessingComponent.execute()