org.openanzo.glitter.query.planning
Class OdoTripleNode

java.lang.Object
  org.openanzo.glitter.query.planning.OdoTripleNode

All Implemented Interfaces:

java.lang.Comparable<OdoTripleNode>

public class OdoTripleNode
extends java.lang.Object
implements java.lang.Comparable<OdoTripleNode>

An OdoTripleNode wraps a TriplePatternNode and allows for stateful comparison of two such nodes based on the number of free variables in each triple pattern.

Author:

lee

Constructor Summary

OdoTripleNode(TriplePatternNode t)
Constructor.

Method Summary

boolean	checkMatch(Variable variable)
int	compareTo(OdoTripleNode otherNode)
int	getMatchedVariableCount()
TriplePatternNode	getTriple()
int	getUnMatchedVariableCount()
int	getVarCount()
java.util.Collection<Variable>	getVariables()

Methods inherited from class java.lang.Object

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

Constructor Detail

OdoTripleNode

public OdoTripleNode(TriplePatternNode t)

Constructor.

Parameters:

t -

Method Detail

getTriple

public TriplePatternNode getTriple()

Returns:

The TriplePatternNode corresponding to this object.

getVarCount

public int getVarCount()

Returns:

The number of variables in this triple pattern

getVariables

public java.util.Collection<Variable> getVariables()

Returns:

The variables in this triple pattern

getMatchedVariableCount

public int getMatchedVariableCount()

Returns:

The number of variables that have been matched via calls to checkMatch(Variable)

getUnMatchedVariableCount

public int getUnMatchedVariableCount()

Returns:

The number of variables in this triple pattern not yet matched via calls to checkMatch(Variable)

checkMatch

public boolean checkMatch(Variable variable)

Parameters:

variable -

Returns:

true, if the given variable occurs in this triple pattern; false, otherwise

compareTo

public int compareTo(OdoTripleNode otherNode)

Specified by:

compareTo in interface java.lang.Comparable<OdoTripleNode>