org.hypergraphdb.query
Class AtomProjectionCondition

java.lang.Object
  org.hypergraphdb.query.AtomProjectionCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

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

An AtomProjectionCondition will yield all atoms that are projections along a certain dimension of a given base atom set. The base atom set is specified as a HGQueryCondition.

The satisfies will work, but it is not intended to be used frequently (e.g. in a loop) since it will execute the condition defined for the base atom set each

Author:

Borislav Iordanov

Constructor Summary

AtomProjectionCondition(java.lang.String[] dimensionPath, HGQueryCondition baseSetCondition)

AtomProjectionCondition(java.lang.String dimensionPath, HGQueryCondition baseSetCondition)

Method Summary

HGQueryCondition	getBaseSetCondition()
java.lang.String[]	getDimensionPath()
boolean	satisfies(HyperGraph graph, HGHandle handle) Check whether a given Object satisfies this query condition.

Methods inherited from class java.lang.Object

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

Constructor Detail

AtomProjectionCondition

public AtomProjectionCondition(java.lang.String dimensionPath,
                               HGQueryCondition baseSetCondition)

AtomProjectionCondition

public AtomProjectionCondition(java.lang.String[] dimensionPath,
                               HGQueryCondition baseSetCondition)

Method Detail

getDimensionPath

public java.lang.String[] getDimensionPath()

getBaseSetCondition

public HGQueryCondition getBaseSetCondition()

satisfies

public boolean satisfies(HyperGraph graph,
                         HGHandle handle)

Description copied from interface: HGAtomPredicate

Check whether a given Object satisfies this query condition.

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.