xdi2.core.impl.keyvalue

Class KeyValueGraph

java.lang.Object

xdi2.core.impl.AbstractGraph

xdi2.core.impl.keyvalue.KeyValueGraph

All Implemented Interfaces:

Serializable, Comparable<Graph>, Graph

public class KeyValueGraph
extends AbstractGraph
implements Graph

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
void	beginTransaction() Starts a new transaction.
void	close() Closes the graph.
void	commitTransaction() Commits the changes made by the transaction.
KeyValueStore	getKeyValueStore() Returns the key/value store this graph is based on.
ContextNode	getRootContextNode(boolean subgraph) Gets the local root context node of this graph.
boolean	getSupportGetContextNodes()
boolean	getSupportGetRelations()
void	rollbackTransaction() Rolls back the changes made by the transaction.
boolean	supportsTransactions() Check if this graph supports transactions.

Methods inherited from class xdi2.core.impl.AbstractGraph

clear, compareTo, containsStatement, equals, getAllStatementCount, getAllStatements, getDeepContextNode, getDeepContextNode, getDeepLiteralNode, getDeepLiteralNode, getDeepNode, getDeepNode, getDeepRelation, getDeepRelation, getDeepRelations, getGraphFactory, getIdentifier, getRootContextNode, getStatement, hashCode, isEmpty, setDeepContextNode, setDeepLiteralNode, setDeepNode, setDeepRelation, setDeepRelation, setStatement, toString, toString, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface xdi2.core.Graph

clear, containsStatement, getAllStatementCount, getAllStatements, getDeepContextNode, getDeepContextNode, getDeepLiteralNode, getDeepLiteralNode, getDeepNode, getDeepNode, getDeepRelation, getDeepRelation, getDeepRelations, getGraphFactory, getIdentifier, getRootContextNode, getStatement, isEmpty, setDeepContextNode, setDeepLiteralNode, setDeepNode, setDeepRelation, setDeepRelation, setStatement, toString, toString, toString

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

getRootContextNode

public ContextNode getRootContextNode(boolean subgraph)

Description copied from interface: Graph

Gets the local root context node of this graph.

Specified by:

getRootContextNode in interface Graph

Parameters:

subgraph - This is simply a hint to the implementation whether child context nodes will subsequently be requested. Implementations may or may not actually use this parameter.

Returns:

The graph's local root context node.

close

public void close()

Description copied from interface: Graph

Closes the graph. This should be called when work on the graph is done.

Specified by:

close in interface Graph

supportsTransactions

public boolean supportsTransactions()

Description copied from interface: Graph

Check if this graph supports transactions.

Specified by:

supportsTransactions in interface Graph

Overrides:

supportsTransactions in class AbstractGraph

beginTransaction

public void beginTransaction()

Description copied from interface: Graph

Starts a new transaction.

Specified by:

beginTransaction in interface Graph

Overrides:

beginTransaction in class AbstractGraph

commitTransaction

public void commitTransaction()

Description copied from interface: Graph

Commits the changes made by the transaction.

Specified by:

commitTransaction in interface Graph

Overrides:

commitTransaction in class AbstractGraph

rollbackTransaction

public void rollbackTransaction()

Description copied from interface: Graph

Rolls back the changes made by the transaction.

Specified by:

rollbackTransaction in interface Graph

Overrides:

rollbackTransaction in class AbstractGraph

getKeyValueStore

public KeyValueStore getKeyValueStore()

Returns the key/value store this graph is based on. WARNING: Do not alter the contents of the store using this method, or your XDI graph may get corrupted.

Returns:

The key/value store backing this graph.

getSupportGetContextNodes

public boolean getSupportGetContextNodes()

Returns:

True, if this key/value graph supports enumerating contexts.

getSupportGetRelations

public boolean getSupportGetRelations()

Returns:

True, if this key/value graph supports enumerating relations.