org.hypergraphdb.query.impl

Class IntersectionQuery<T>

java.lang.Object

org.hypergraphdb.HGQuery<T>

org.hypergraphdb.query.impl.IntersectionQuery<T>

All Implemented Interfaces:

Iterable<HGQuery<T>>, HGGraphHolder

public class IntersectionQuery<T>
extends HGQuery<T>
implements Iterable<HGQuery<T>>

An IntersectionQuery combines the results of two underlying queries and produces a result set containing only elements that appear in both of the input result sets.

Author:

Borislav Iordanov

Nested Class Summary

Nested classes/interfaces inherited from class org.hypergraphdb.HGQuery

HGQuery.hg

Field Summary

Fields inherited from class org.hypergraphdb.HGQuery

ctx, graph

Constructor Summary

Constructors

Constructor and Description
IntersectionQuery(HGQuery<T> left, HGQuery<T> right, RSCombiner<T> combiner) Construct an intersection of two queries.

Method Summary

Methods

Modifier and Type	Method and Description
HGSearchResult<T>	execute() Execute the query and return the result set.
RSCombiner<T>	getCombiner()
HGQuery<T>	getLeft()
HGQuery<T>	getRight()
Iterator<HGQuery<T>>	iterator()
void	setCombiner(RSCombiner<T> combiner)
void	setLeft(HGQuery<T> left)
void	setRight(HGQuery<T> right)

Methods inherited from class org.hypergraphdb.HGQuery

compile, findAll, findInSet, findOne, getHyperGraph, initialValue, initialVar, make, make, NOP, setHyperGraph, var, var

Methods inherited from class java.lang.Object

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

Constructor Detail

IntersectionQuery

public IntersectionQuery(HGQuery<T> left,
                 HGQuery<T> right,
                 RSCombiner<T> combiner)

Construct an intersection of two queries.

Parameters:

left - One of the two queries. May not be null.

right - The other of the two queries. May not be null.

Method Detail

execute

public HGSearchResult<T> execute()

Description copied from class: HGQuery

Execute the query and return the result set. Note that queries are lazily executed so that results are actually obtained when one iterates (using the next and prev of the returned object).

Specified by:

execute in class HGQuery<T>

getLeft

public HGQuery<T> getLeft()

setLeft

public void setLeft(HGQuery<T> left)

getRight

public HGQuery<T> getRight()

setRight

public void setRight(HGQuery<T> right)

getCombiner

public RSCombiner<T> getCombiner()

setCombiner

public void setCombiner(RSCombiner<T> combiner)

iterator

public Iterator<HGQuery<T>> iterator()

Specified by:

iterator in interface Iterable<HGQuery<T>>