org.modeshape.jcr.query.process
Class ProjectComponent

java.lang.Object
  org.modeshape.jcr.query.process.ProcessingComponent
      org.modeshape.jcr.query.process.DelegatingComponent
          org.modeshape.jcr.query.process.ProjectComponent

public class ProjectComponent
extends DelegatingComponent

A ProcessingComponent implementation that performs a PROJECT operation to reduce the columns that appear in the results.

Nested Class Summary

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

ProcessingComponent.DynamicOperation

Constructor Summary

ProjectComponent(ProcessingComponent delegate, List<Column> columns)

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.jcr.query.process.DelegatingComponent

close, delegate

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

createDynamicOperation, createSortComparator, emptyTuples, getColumns, getContext, getLocationIndexes, problems

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectComponent

public ProjectComponent(ProcessingComponent delegate,
                        List<Column> columns)

Method Detail

execute

public List<Object[]> execute()

Description copied from class: ProcessingComponent

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