Module org.apache.jena.core

Package org.apache.jena.mem

Class GraphMemBase

java.lang.Object

org.apache.jena.graph.impl.GraphBase

org.apache.jena.mem.GraphMemBase

All Implemented Interfaces:

Graph, GraphWithPerform

Direct Known Subclasses:

GraphMem

public abstract class GraphMemBase
extends GraphBase

GraphMemBase - a common base class for GraphMem and SmallGraphMem. Any GraphMemBase maintains a reference count, set to one when it is created, and incremented by the method openAgain(). When the graph is closed, the count is decrememented, and when it reaches 0, the tables are trashed and GraphBase.close() called. Thus in normal use one close is enough, but GraphMakers using GraphMems can arrange to re-use the same named graph.

Field Summary

Fields

Modifier and Type	Field	Description
final TripleStore	store	This Graph's TripleStore.

Fields inherited from class org.apache.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface org.apache.jena.graph.Graph

emptyGraph

Constructor Summary

Constructors

Constructor	Description
GraphMemBase()	initialise a GraphMemBase with its count set to 1.

Method Summary

Modifier and Type	Method	Description
void	close()	Close this graph; if it is now fully closed, destroy its resources and run the GraphBase close.
GraphMemBase	openAgain()	Note a re-opening of this graph by incrementing the count.

Methods inherited from class org.apache.jena.graph.impl.GraphBase

add, clear, contains, contains, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getCapabilities, getEventManager, getPrefixMapping, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, performAdd, performDelete, remove, size, toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.graph.Graph

add, delete, find, stream, stream

Field Details

store

public final TripleStore store

This Graph's TripleStore. Visible for read-only purposes only.

Constructor Details

GraphMemBase

public GraphMemBase()

initialise a GraphMemBase with its count set to 1.

Method Details

openAgain

public GraphMemBase openAgain()

Note a re-opening of this graph by incrementing the count. Answer this Graph.

close

public void close()

Close this graph; if it is now fully closed, destroy its resources and run the GraphBase close.

Specified by:

close in interface Graph

Overrides:

close in class GraphBase