org.hypergraphdb.query

Class LinkCondition

java.lang.Object

org.hypergraphdb.query.LinkCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

public class LinkCondition
extends Object
implements HGQueryCondition, HGAtomPredicate

A LinkCondition constraints the query result set to links pointing to a target set of atoms. The target set is specified when the condition is constructed through an array of HGHandles.

Author:

Borislav Iordanov

Constructor Summary

Constructors

Constructor and Description
LinkCondition()
LinkCondition(Collection<HGHandle> targets)
LinkCondition(HGHandle... targets)
LinkCondition(HGLink link)
LinkCondition(Ref<HGHandle>... targets)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(HGHandle h)
boolean	equals(Object x)
Set<Ref<HGHandle>>	getTargetSet()
int	hashCode()
boolean	satisfies(HyperGraph graph, HGHandle handle) Return true if handle points to a link whose target set is a superset of this condition's targetSet.
void	setTargetSet(Set<Ref<HGHandle>> targetSet)
Set<Ref<HGHandle>>	targets()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LinkCondition

public LinkCondition()

LinkCondition

public LinkCondition(HGLink link)

LinkCondition

public LinkCondition(HGHandle... targets)

LinkCondition

public LinkCondition(Ref<HGHandle>... targets)

LinkCondition

public LinkCondition(Collection<HGHandle> targets)

Method Detail

contains

public boolean contains(HGHandle h)

targets

public Set<Ref<HGHandle>> targets()

getTargetSet

public Set<Ref<HGHandle>> getTargetSet()

setTargetSet

public void setTargetSet(Set<Ref<HGHandle>> targetSet)

satisfies

public boolean satisfies(HyperGraph graph,
                HGHandle handle)

Return true if handle points to a link whose target set is a superset of this condition's targetSet.

Specified by:

satisfies in interface HGAtomPredicate

Parameters:

graph - The HyperGraph instance.

handle - The atom on which to test the query condition.

Returns:

true if the passed in parameter satisfies the condition and false otherwise.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object x)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object