org.hypergraphdb.query
Class LinkCondition

java.lang.Object
  org.hypergraphdb.query.LinkCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

public class LinkCondition
extends java.lang.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

LinkCondition()

LinkCondition(HGHandle[] targets)

Method Summary

boolean	equals(java.lang.Object x)
java.util.HashSet<HGHandle>	getTargetSet()
int	hashCode()
boolean	satisfies(HyperGraph hg, HGHandle handle) Return true if handle points to a link whose target set is a superset of this condition's targetSet.
void	setTargetSet(java.util.HashSet<HGHandle> targetSet)
java.util.HashSet<HGHandle>	targets()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LinkCondition

public LinkCondition()

LinkCondition

public LinkCondition(HGHandle[] targets)

Method Detail

targets

public java.util.HashSet<HGHandle> targets()

getTargetSet

public java.util.HashSet<HGHandle> getTargetSet()

setTargetSet

public void setTargetSet(java.util.HashSet<HGHandle> targetSet)

satisfies

public boolean satisfies(HyperGraph hg,
                         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:

hg - 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 java.lang.Object

equals

public boolean equals(java.lang.Object x)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object