org.hypergraphdb.query
Class OrderedLinkCondition

java.lang.Object
  org.hypergraphdb.query.OrderedLinkCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

public class OrderedLinkCondition
extends java.lang.Object
implements HGQueryCondition, HGAtomPredicate

A OrderedLinkCondition constraints the query result set to ordered links pointing to a target set of atoms. The target set is specified when the condition is constructed through an array of HGHandles. This array must have the targets in the desired order. Note that the targetSet parameter of this condition need only be a subset of the examined links' target sets. Thus a link with an ordered target set of (a,b,c,d) would be satisfied by an OrderedLinkCondition constructed with the target set (b,d) for example. If same arity is desired, the ArityCondition should be used in conjunction with this one.

Author:

Borislav Iordanov

Constructor Summary

OrderedLinkCondition()

OrderedLinkCondition(HGHandle[] targetSet)

Method Summary

boolean	equals(java.lang.Object x)
HGHandle[]	getTargets()
int	hashCode()
boolean	satisfies(HyperGraph hg, HGHandle handle) Check whether a given Object satisfies this query condition.
void	setTarget(int pos, HGHandle newTarget)
void	setTargets(HGHandle[] targetSet)
HGHandle[]	targets()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OrderedLinkCondition

public OrderedLinkCondition()

OrderedLinkCondition

public OrderedLinkCondition(HGHandle[] targetSet)

Method Detail

targets

public HGHandle[] targets()

getTargets

public HGHandle[] getTargets()

setTargets

public void setTargets(HGHandle[] targetSet)

setTarget

public void setTarget(int pos,
                      HGHandle newTarget)

satisfies

public boolean satisfies(HyperGraph hg,
                         HGHandle handle)

Description copied from interface: HGAtomPredicate

Check whether a given Object satisfies this query condition.

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.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

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