org.openanzo.common.rdb.query
Class NodeConverter

java.lang.Object
  org.openanzo.common.rdb.query.NodeConverter

public class NodeConverter
extends java.lang.Object

Convert between Glitter and Anzo node types

Author:

Matthew Roy ( mroy@cambridgesemantics.com )

Constructor Summary

NodeConverter(CompositeNodeLayout nodeLayout)
Create a new NodeConverter

Method Summary

void	clearCache() Clear the node and bnode caches
org.openrdf.model.Value	convert(TriplePatternComponent glitterNode, boolean blankNodesAsVariables, java.util.Map<java.lang.Long,org.openrdf.model.Value> alreadyStored) Convert the Glitter node into its corresponding Anzo value
IRdbTerm	getGlitterNode(long id) Convert a node ID into the corresponding Glitter IRdbTerm
Triple	getGlitterTriple(long s, long p, long o) Get a new Glitter triple for the given IDs

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeConverter

public NodeConverter(CompositeNodeLayout nodeLayout)

Create a new NodeConverter

Parameters:

nodeLayout - source of data

Method Detail

convert

public org.openrdf.model.Value convert(TriplePatternComponent glitterNode,
                                       boolean blankNodesAsVariables,
                                       java.util.Map<java.lang.Long,org.openrdf.model.Value> alreadyStored)

Convert the Glitter node into its corresponding Anzo value

Parameters:

glitterNode - Glitter node to convert

blankNodesAsVariables - should blank nodes be converted to variables, or URIs

alreadyStored - map of existing IDs to their Anzo Value

Returns:

converted Anzo Value

getGlitterNode

public IRdbTerm getGlitterNode(long id)

Convert a node ID into the corresponding Glitter IRdbTerm

Parameters:

id - of node

Returns:

converted IRdbTerm for node

getGlitterTriple

public Triple getGlitterTriple(long s,
                               long p,
                               long o)
                        throws GlitterException

Get a new Glitter triple for the given IDs

Parameters:

s - ID of subject node

p - ID of predicate node

o - ID of object node

Returns:

new Glitter triple

Throws:

GlitterException

clearCache

public void clearCache()

Clear the node and bnode caches