org.nsdl.mptstore.query.component
Class MappableTriplePattern

java.lang.Object
  org.nsdl.mptstore.query.component.MappableTriplePattern

All Implemented Interfaces:

TriplePattern

public class MappableTriplePattern
extends java.lang.Object
implements TriplePattern

Represents a pattern that defines matching triples.

A triple pattern contains three MappableNodePatterns representing the subject, predicate, and object of a triple.

In addition to representing a particular triple pattern, a TriplePattern may be bound to a apecific table (logically, the one that maps to its predicate). When bound to a table, the TriplePattern may be used for selecting triples from its table or for joining triple selection results with other TriplePatterns.

Author:

birkland

Constructor Summary

MappableTriplePattern(MappableNodePattern<SubjectNode> s, MappableNodePattern<PredicateNode> p, MappableNodePattern<ObjectNode> o)
Construct a mappable triple pattern with the given component patterns.

MappableTriplePattern(TriplePattern pattern)
Construct a mappable triple pattern using the existing triple pattern.

Method Summary

void	bindTo(MPTable t) Bind this triple pattern to the given table.
java.util.Set<MappableNodePattern<? extends Node>>	getNodes() Get the subject and object node patterns in a set.
MappableNodePattern<ObjectNode>	getObject() Get the object pattern.
MappableNodePattern<PredicateNode>	getPredicate() Get the predicate pattern.
MappableNodePattern<SubjectNode>	getSubject() Get the subject pattern.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MappableTriplePattern

public MappableTriplePattern(MappableNodePattern<SubjectNode> s,
                             MappableNodePattern<PredicateNode> p,
                             MappableNodePattern<ObjectNode> o)

Construct a mappable triple pattern with the given component patterns.

Parameters:

s - the subject pattern.

p - the predicate pattern.

o - the object pattern.

MappableTriplePattern

public MappableTriplePattern(TriplePattern pattern)

Construct a mappable triple pattern using the existing triple pattern.

Parameters:

pattern - the existing triple pattern.

Method Detail

getSubject

public MappableNodePattern<SubjectNode> getSubject()

Get the subject pattern.

Specified by:

getSubject in interface TriplePattern

Returns:

the subject pattern.

getPredicate

public MappableNodePattern<PredicateNode> getPredicate()

Get the predicate pattern.

Specified by:

getPredicate in interface TriplePattern

Returns:

the predicate pattern.

getObject

public MappableNodePattern<ObjectNode> getObject()

Get the object pattern.

Specified by:

getObject in interface TriplePattern

Returns:

the object pattern.

bindTo

public void bindTo(MPTable t)

Bind this triple pattern to the given table.

Parameters:

t - the table to bind to.

getNodes

public java.util.Set<MappableNodePattern<? extends Node>> getNodes()

Get the subject and object node patterns in a set.

Returns:

a set containing the subject and object node patterns.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object