Module org.apache.jena.arq

Package org.apache.jena.sparql.core

Class DatasetGraphReadOnly

java.lang.Object

org.apache.jena.sparql.core.DatasetGraphWrapper

org.apache.jena.sparql.core.DatasetGraphReadOnly

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, DatasetGraph, Transactional

Direct Known Subclasses:

DatasetGraphFilteredView, DynamicDatasets.DynamicDatasetGraph

public class DatasetGraphReadOnly
extends DatasetGraphWrapper

Read-only view of a DatasetGraph. Assumes the dataset underneath isn't changing.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.jena.sparql.core.Transactional

Transactional.Promote

Constructor Summary

Constructors

Constructor	Description
DatasetGraphReadOnly(DatasetGraph dsg)
DatasetGraphReadOnly(DatasetGraph dsg, Context cxt)

Method Summary

Modifier and Type	Method	Description
void	begin(ReadWrite mode)	Start either a READ or WRITE transaction.
void	close()	Close the dataset
Graph	getDefaultGraph()	Get the default graph as a Jena Graph
Graph	getGraph(Node graphNode)	Get the graph named by graphNode : returns null when there is no such graph.

Methods inherited from class org.apache.jena.sparql.core.DatasetGraphWrapper

abort, add, add, addGraph, begin, begin, clear, commit, contains, contains, containsGraph, delete, delete, deleteAny, end, find, find, find, findNG, getBase, getBaseForQuery, getContext, getLock, getUnionGraph, getWrapped, isEmpty, isInTransaction, listGraphNodes, prefixes, promote, promote, removeGraph, setDefaultGraph, size, supportsTransactionAbort, supportsTransactions, sync, toString, transactionMode, transactionType, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.sparql.core.DatasetGraph

addAll, stream, stream

Methods inherited from interface org.apache.jena.sparql.core.Transactional

calc, calculate, calculateRead, calculateWrite, exec, execute, executeRead, executeWrite

Constructor Details

DatasetGraphReadOnly

public DatasetGraphReadOnly(DatasetGraph dsg)

DatasetGraphReadOnly

public DatasetGraphReadOnly(DatasetGraph dsg,
 Context cxt)

Method Details

getDefaultGraph

public Graph getDefaultGraph()

Description copied from interface: DatasetGraph

Get the default graph as a Jena Graph

Specified by:

getDefaultGraph in interface DatasetGraph

Overrides:

getDefaultGraph in class DatasetGraphWrapper

begin

public void begin(ReadWrite mode)

Description copied from interface: Transactional

Start either a READ or WRITE transaction.

Specified by:

begin in interface Transactional

Overrides:

begin in class DatasetGraphWrapper

getGraph

public Graph getGraph(Node graphNode)

Description copied from interface: DatasetGraph

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

Specified by:

getGraph in interface DatasetGraph

Overrides:

getGraph in class DatasetGraphWrapper

close

public void close()

Description copied from interface: DatasetGraph

Close the dataset

Specified by:

close in interface org.apache.jena.atlas.lib.Closeable

Specified by:

close in interface DatasetGraph

Overrides:

close in class DatasetGraphWrapper