org.jboss.dna.graph.query.process
Class DistinctComponent

java.lang.Object
  org.jboss.dna.graph.query.process.ProcessingComponent
      org.jboss.dna.graph.query.process.DelegatingComponent
          org.jboss.dna.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.

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.jboss.dna.graph.query.process.DelegatingComponent

close

Methods inherited from class org.jboss.dna.graph.query.process.ProcessingComponent

getColumns, getContext

Methods inherited from class java.lang.Object

equals, 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()