org.modeshape.graph.query.process
Class SortValuesComponent

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

public class SortValuesComponent
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.graph.query.process.ProcessingComponent

ProcessingComponent.DynamicOperation

Constructor Summary

SortValuesComponent(ProcessingComponent delegate, List<Ordering> orderings, Map<SelectorName,SelectorName> sourceNamesByAlias)

Method Summary

protected Comparator<Object[]>	createSortComparator(QueryContext context, QueryResults.Columns columns, List<Ordering> orderings, Map<SelectorName,SelectorName> sourceNamesByAlias)
protected Comparator<Object[]>	createSortComparator(QueryContext context, QueryResults.Columns columns, Ordering ordering, Map<SelectorName,SelectorName> sourceNamesByAlias)
List<Object[]>	execute() Execute this stage of processing and return the resulting tuples that each conform to the columns.
Comparator<Object[]>	getSortingComparator()

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

SortValuesComponent

public SortValuesComponent(ProcessingComponent delegate,
                           List<Ordering> orderings,
                           Map<SelectorName,SelectorName> sourceNamesByAlias)

Method Detail

getSortingComparator

public Comparator<Object[]> getSortingComparator()

Returns:

sortingComparator

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()

createSortComparator

protected Comparator<Object[]> createSortComparator(QueryContext context,
                                                    QueryResults.Columns columns,
                                                    List<Ordering> orderings,
                                                    Map<SelectorName,SelectorName> sourceNamesByAlias)

createSortComparator

protected Comparator<Object[]> createSortComparator(QueryContext context,
                                                    QueryResults.Columns columns,
                                                    Ordering ordering,
                                                    Map<SelectorName,SelectorName> sourceNamesByAlias)