Module org.apache.jena.dboe.storage

Package org.apache.jena.dboe.storage.system

Class DatasetGraphStorage

java.lang.Object

org.apache.jena.sparql.core.DatasetGraphBase

org.apache.jena.sparql.core.DatasetGraphBaseFind

org.apache.jena.dboe.storage.system.DatasetGraphStorage

All Implemented Interfaces:

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

Direct Known Subclasses:

SimpleDB.DatasetGraphSimpleDB

public class DatasetGraphStorage
extends DatasetGraphBaseFind
implements DatabaseRDF

Alternative: DatasetGraph over RDFStorage, using DatasetGraphBaseFind Collapses DatasetGraphTriplesQuads into this adapter class.

   DatasetGraph
     DatasetGraphBase
       DatasetGraphBaseFind
         DatasetGraphStorage
    

A DatasetGraph base class for triples+quads storage. The machinery is really the splitting between default and named graphs. This happens in two classes, DatasetGraphBaseFind (for find splitting) and DatasetGraphTriplesQuads add/delete splitting (it inherits DatasetGraphBaseFind).

Because storage is usually decomposing quads and triples, the default behaviour is to work in s/p/o and g/s/p/o.

Nested Class Summary

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

Transactional.Promote

Constructor Summary

Constructors

Constructor	Description
DatasetGraphStorage(StorageRDF storage, StoragePrefixes prefixes, Transactional transactional)

Method Summary

Modifier and Type	Method	Description
void	abort()
void	add(Node g, Node s, Node p, Node o)
void	add(Quad quad)
void	addGraph(Node graphName, Graph graph)
void	begin()
void	begin(ReadWrite mode)
void	begin(TxnType txnType)
void	commit()
void	delete(Node g, Node s, Node p, Node o)
void	delete(Quad quad)
void	end()
StorageRDF	getData()
Graph	getDefaultGraph()
Graph	getGraph(Node graphNode)
StoragePrefixes	getStoragePrefixes()
Transactional	getTransactional()
Graph	getUnionGraph()
boolean	isInTransaction()
Iterator<Node>	listGraphNodes()	Provide a general implementation of "listGraphNodes".
PrefixMap	prefixes()
boolean	promote(Transactional.Promote mode)
void	removeGraph(Node graphName)
long	size()
boolean	supportsTransactionAbort()
boolean	supportsTransactions()
String	toString()
ReadWrite	transactionMode()
TxnType	transactionType()

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

find, findInUnionGraph, findNG, findQuadsInUnionGraph

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

clear, close, contains, contains, containsGraph, deleteAny, deleteAny, find, find, getContext, getLock, isEmpty, setDefaultGraph

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, promote

Constructor Details

DatasetGraphStorage

public DatasetGraphStorage(StorageRDF storage,
 StoragePrefixes prefixes,
 Transactional transactional)

Method Details

begin

public void begin()

Specified by:

begin in interface Transactional

begin

public void begin(TxnType txnType)

Specified by:

begin in interface Transactional

begin

public void begin(ReadWrite mode)

Specified by:

begin in interface Transactional

promote

public boolean promote(Transactional.Promote mode)

Specified by:

promote in interface Transactional

commit

public void commit()

Specified by:

commit in interface Transactional

abort

public void abort()

Specified by:

abort in interface Transactional

isInTransaction

public boolean isInTransaction()

Specified by:

isInTransaction in interface Transactional

end

public void end()

Specified by:

end in interface Transactional

transactionMode

public ReadWrite transactionMode()

Specified by:

transactionMode in interface Transactional

transactionType

public TxnType transactionType()

Specified by:

transactionType in interface Transactional

supportsTransactions

public boolean supportsTransactions()

Specified by:

supportsTransactions in interface DatasetGraph

supportsTransactionAbort

public boolean supportsTransactionAbort()

Specified by:

supportsTransactionAbort in interface DatasetGraph

getData

public StorageRDF getData()

Specified by:

getData in interface DatabaseRDF

Returns:

the triples/quads storage.

getStoragePrefixes

public StoragePrefixes getStoragePrefixes()

Specified by:

getStoragePrefixes in interface DatabaseRDF

Returns:

the prefixes storage.

getTransactional

public Transactional getTransactional()

Specified by:

getTransactional in interface DatabaseRDF

Returns:

the Transactional for this database.

prefixes

public PrefixMap prefixes()

Specified by:

prefixes in interface DatasetGraph

listGraphNodes

public Iterator<Node> listGraphNodes()

Provide a general implementation of "listGraphNodes". Implementations may wish to override and do this operation in a more efficient manner.

Specified by:

listGraphNodes in interface DatasetGraph

getDefaultGraph

public Graph getDefaultGraph()

Specified by:

getDefaultGraph in interface DatasetGraph

Specified by:

getDefaultGraph in class DatasetGraphBase

getUnionGraph

public Graph getUnionGraph()

Specified by:

getUnionGraph in interface DatasetGraph

Overrides:

getUnionGraph in class DatasetGraphBase

getGraph

public Graph getGraph(Node graphNode)

Specified by:

getGraph in interface DatasetGraph

Specified by:

getGraph in class DatasetGraphBase

add

public void add(Quad quad)

Specified by:

add in interface DatasetGraph

Overrides:

add in class DatasetGraphBase

delete

public void delete(Quad quad)

Specified by:

delete in interface DatasetGraph

Overrides:

delete in class DatasetGraphBase

add

public void add(Node g,
 Node s,
 Node p,
 Node o)

Specified by:

add in interface DatasetGraph

Overrides:

add in class DatasetGraphBase

delete

public void delete(Node g,
 Node s,
 Node p,
 Node o)

Specified by:

delete in interface DatasetGraph

Overrides:

delete in class DatasetGraphBase

addGraph

public void addGraph(Node graphName,
 Graph graph)

Specified by:

addGraph in interface DatasetGraph

Specified by:

addGraph in class DatasetGraphBase

removeGraph

public void removeGraph(Node graphName)

Specified by:

removeGraph in interface DatasetGraph

Specified by:

removeGraph in class DatasetGraphBase

size

public long size()

Specified by:

size in interface DatasetGraph

Overrides:

size in class DatasetGraphBase

toString

public String toString()

Overrides:

toString in class DatasetGraphBase