com.hp.hpl.jena.sparql.core

Class DatasetGraphMap

java.lang.Object

com.hp.hpl.jena.sparql.core.DatasetGraphBase

com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind

com.hp.hpl.jena.sparql.core.DatasetGraphCollection

com.hp.hpl.jena.sparql.core.DatasetGraphMap

All Implemented Interfaces:

DatasetGraph, Closeable

Direct Known Subclasses:

DatasetGraphMaker

public class DatasetGraphMap
extends DatasetGraphCollection

Implementation of a DatasetGraph as an extensible set of graphs. Subclasses need to manage any implicit graph creation.

Constructor Summary

Constructors

Constructor and Description
DatasetGraphMap(DatasetGraph dsg) Create a new DatasetGraph that initially shares the graphs of the givem DatasetGraph.
DatasetGraphMap(Graph defaultGraph)

Method Summary

Methods

Modifier and Type	Method and Description
void	addGraph(Node graphName, Graph graph) Add the given graph to the dataset.
void	close() Close the dataset
boolean	containsGraph(Node graphNode)
Graph	getDefaultGraph() Get the default graph as a Jena Graph
Graph	getGraph(Node graphNode) Get the graph named by graphNode : returns null on no graph NB Whether a dataset contains a graph if there are no triples is not defined - see the specifc implementation.
Iterator<Node>	listGraphNodes() Iterate over all names of named graphs
void	removeGraph(Node graphName) Remove all data associated with the named graph
void	setDefaultGraph(Graph g) Set the default graph.
long	size() Get the size (number of named graphs) - may be -1 for unknown

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphCollection

add, delete

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind

find, findNG

Methods inherited from class com.hp.hpl.jena.sparql.core.DatasetGraphBase

add, contains, contains, delete, deleteAny, find, find, getContext, getLock, isEmpty, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DatasetGraphMap

public DatasetGraphMap(Graph defaultGraph)

DatasetGraphMap

public DatasetGraphMap(DatasetGraph dsg)

Create a new DatasetGraph that initially shares the graphs of the givem DatasetGraph. Adding/removing graphs will only affect this object, not the argument DatasetGraph but changed to shared graphs are seenby both objects.

Method Detail

containsGraph

public boolean containsGraph(Node graphNode)

Specified by:

containsGraph in interface DatasetGraph

Overrides:

containsGraph in class DatasetGraphBase

getDefaultGraph

public Graph getDefaultGraph()

Description copied from interface: DatasetGraph

Get the default graph as a Jena Graph

Specified by:

getDefaultGraph in interface DatasetGraph

Specified by:

getDefaultGraph in class DatasetGraphBase

getGraph

public Graph getGraph(Node graphNode)

Description copied from interface: DatasetGraph

Get the graph named by graphNode : returns null on no graph NB Whether a dataset contains a graph if there are no triples is not defined - see the specifc implementation. Some datasets are "open" - they have all graphs even if no triples,

Specified by:

getGraph in interface DatasetGraph

Specified by:

getGraph in class DatasetGraphBase

addGraph

public void addGraph(Node graphName,
            Graph graph)

Description copied from interface: DatasetGraph

Add the given graph to the dataset. Replaces any existing data for the named graph; to add data, get the graph and add triples to it, or add quads to the dataset. Do not assume that the same Java object is returned by DatasetGraph.getGraph(com.hp.hpl.jena.graph.Node)

Specified by:

addGraph in interface DatasetGraph

Overrides:

addGraph in class DatasetGraphBase

removeGraph

public void removeGraph(Node graphName)

Description copied from interface: DatasetGraph

Remove all data associated with the named graph

Specified by:

removeGraph in interface DatasetGraph

Overrides:

removeGraph in class DatasetGraphBase

setDefaultGraph

public void setDefaultGraph(Graph g)

Description copied from interface: DatasetGraph

Set the default graph. Set the active graph if it was null. This replaces the contents default graph, not merge data into it. Do not assume that the same object is returned by DatasetGraph.getDefaultGraph()

Specified by:

setDefaultGraph in interface DatasetGraph

Overrides:

setDefaultGraph in class DatasetGraphBase

listGraphNodes

public Iterator<Node> listGraphNodes()

Description copied from interface: DatasetGraph

Iterate over all names of named graphs

Specified by:

listGraphNodes in interface DatasetGraph

Specified by:

listGraphNodes in class DatasetGraphCollection

size

public long size()

Description copied from interface: DatasetGraph

Get the size (number of named graphs) - may be -1 for unknown

Specified by:

size in interface DatasetGraph

Overrides:

size in class DatasetGraphBase

close

public void close()

Description copied from interface: DatasetGraph

Close the dataset

Specified by:

close in interface DatasetGraph

Specified by:

close in interface Closeable

Overrides:

close in class DatasetGraphBase