org.mulgara.mrg
Class GraphImpl

java.lang.Object
  org.mulgara.mrg.AbstractGraphExt
      org.mulgara.mrg.AbstractGraph
          org.mulgara.mrg.GraphImpl

All Implemented Interfaces:

AppendableGraph, Graph, GraphExt, WritableGraph

public class GraphImpl
extends AbstractGraph

A hashmap based RDF graph. This gives constant time lookups for basic operations, though without full indexing it can give linear time on some operations.

Field Summary

Fields inherited from interface org.mulgara.mrg.Graph

X

Constructor Summary

GraphImpl()
Default constructor for an empty graph.

GraphImpl(Collection<Triple> triples)
Builds a graph with a collection of triples.

Method Summary

protected <X> Collection<X>	createCollection() Use a HashSet for efficient lookups.
protected <X,Y> Map<X,Y>	createMap() Use hashmaps for efficient lookups.

Methods inherited from class org.mulgara.mrg.AbstractGraph

delete, delete, doesResourceExist, exportN3, exportN3, exportXML, exportXML, getObjects, getPredicates, getProperties, getRawProperties, getRdfList, getSubjects, getSubjects, getTriples, getValue, getValues, insert, insert, isAsserted, isAsserted, isEmpty, match, matchSubgraph, mergeInto, size, unionInto

Methods inherited from class org.mulgara.mrg.AbstractGraphExt

doesResourceExist, doesResourceExist, getProperties, getProperties, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValues, getValues, getValues, getValues, getValues, getValues, getValues, getValues, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mulgara.mrg.GraphExt

doesResourceExist, doesResourceExist, getProperties, getProperties, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getRdfList, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getSubjects, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValue, getValues, getValues, getValues, getValues, getValues, getValues, getValues, getValues, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, isAsserted, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchSubgraphX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX, matchX

Constructor Detail

GraphImpl

public GraphImpl()

Default constructor for an empty graph.

GraphImpl

public GraphImpl(Collection<Triple> triples)

Builds a graph with a collection of triples.

Parameters:

triples - The initial triples for the graph.

Method Detail

createMap

protected <X,Y> Map<X,Y> createMap()

Use hashmaps for efficient lookups.

Specified by:

createMap in class AbstractGraph

Returns:

an instance of a HashMap.

createCollection

protected <X> Collection<X> createCollection()

Use a HashSet for efficient lookups.

Specified by:

createCollection in class AbstractGraph

Returns:

an instance of a HashSet.