org.jrdf.graph.local.index.graphhandler
Class GraphHandler012

java.lang.Object
  org.jrdf.graph.local.index.graphhandler.AbstractGraphHandler
      org.jrdf.graph.local.index.graphhandler.GraphHandler012

All Implemented Interfaces:

GraphHandler

public class GraphHandler012
extends AbstractGraphHandler

Handles operations on 012 index.

Version:

$Revision: 1815 $

Author:

Andrew Newman

Field Summary

Fields inherited from class org.jrdf.graph.local.index.graphhandler.AbstractGraphHandler

nodePool

Constructor Summary

GraphHandler012(LongIndex[] indexes, NodePool newNodePool)

Method Summary

Triple	createTriple(Long... nodes) Creates the globalized nodes based on the internal representation of the nodes.
Iterator<Map.Entry<Long,Map<Long,Set<Long>>>>	getEntries() Returns an iterator over an internal representation of the graph in the fixed order based on the underlying index.
Map<Long,Set<Long>>	getSubIndex(Long first) Returns the map of long to set of longs for the given entry of the index.
void	remove(Long... nodes) Removes a triple from the other indexes of the graph.
boolean	removeSubIndex(Long first) Removes the given entry of long to set of longs with the given entry.

Methods inherited from class org.jrdf.graph.local.index.graphhandler.AbstractGraphHandler

dumpIndex, reconstructIndices

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphHandler012

public GraphHandler012(LongIndex[] indexes,
                       NodePool newNodePool)

Method Detail

getSubIndex

public Map<Long,Set<Long>> getSubIndex(Long first)

Description copied from interface: GraphHandler

Returns the map of long to set of longs for the given entry of the index. For example, a given subject id is given and it returns a map of predicates to objects.

Parameters:

first - the entry set to find.

Returns:

a map containing the list of longs to set of longs.

removeSubIndex

public boolean removeSubIndex(Long first)

Description copied from interface: GraphHandler

Removes the given entry of long to set of longs with the given entry. For example, a given subject id is given and it will remove all the associated predicate and objects for that subject.

Parameters:

first - the entry set to remove.

Returns:

true if the entry set was non-null.

getEntries

public Iterator<Map.Entry<Long,Map<Long,Set<Long>>>> getEntries()

Description copied from interface: GraphHandler

Returns an iterator over an internal representation of the graph in the fixed order based on the underlying index.

Returns:

an iterator over an internal representation of the graph in the fixed order based on the underlying index.

createTriple

public Triple createTriple(Long... nodes)

Description copied from interface: GraphHandler

Creates the globalized nodes based on the internal representation of the nodes. This may move to the NodePool interface.

Parameters:

nodes - an array of three triple values to create.

Returns:

an array of three nodes.

remove

public void remove(Long... nodes)
            throws GraphException

Description copied from interface: GraphHandler

Removes a triple from the other indexes of the graph. For example, if this is the 012 GraphHandler it will remove the 120 and 201.

Parameters:

nodes - the array of nodes to remove.

Throws:

GraphException - if the nodes do not exist.