Module org.apache.jena.tdb

Package org.apache.jena.tdb1.store.nodetable

Class NodeTableCache

java.lang.Object

org.apache.jena.tdb1.store.nodetable.NodeTableCache

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, NodeTable

public class NodeTableCache
extends Object
implements NodeTable

Cache wrapper around a NodeTable. Assumes all access goes through this wrapper. Read-cache - write caching is done via the object file used by the base NodeTable.

Method Summary

Modifier and Type	Method	Description
Iterator<org.apache.jena.atlas.lib.Pair<NodeId,org.apache.jena.graph.Node>>	all()	Iterate over all nodes (not necessarily fast).
NodeId	allocOffset()	The offset needed to predicate allocation difference between persistent tables - internal function
void	close()
boolean	containsNode(org.apache.jena.graph.Node node)	Test whether the node table contains an entry for node
boolean	containsNodeId(NodeId nodeId)	Test whether the node table contains an entry for node
static NodeTable	create(NodeTable nodeTable, int nodeToIdCacheSize, int idToNodeCacheSize, int nodeMissesCacheSize)
static NodeTable	create(NodeTable nodeTable, StoreParams params)
NodeId	getAllocateNodeId(org.apache.jena.graph.Node node)	Find the NodeId for a node, allocating a new NodeId if the Node does not yet have a NodeId
org.apache.jena.graph.Node	getNodeForNodeId(NodeId id)	Get the Node for this NodeId, or null if none
NodeId	getNodeIdForNode(org.apache.jena.graph.Node node)	Find the NodeId for a node, or return NodeId.NodeDoesNotExist
boolean	isEmpty()	Anything there?
void	sync()
String	toString()
final NodeTable	wrapped()	Return a NodeTable if this instance wraps another, else return null

Methods inherited from class java.lang.Object

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

Method Details

create

public static NodeTable create(NodeTable nodeTable,
 StoreParams params)

create

public static NodeTable create(NodeTable nodeTable,
 int nodeToIdCacheSize,
 int idToNodeCacheSize,
 int nodeMissesCacheSize)

wrapped

public final NodeTable wrapped()

Description copied from interface: NodeTable

Return a NodeTable if this instance wraps another, else return null

Specified by:

wrapped in interface NodeTable

getNodeForNodeId

public org.apache.jena.graph.Node getNodeForNodeId(NodeId id)

Get the Node for this NodeId, or null if none

Specified by:

getNodeForNodeId in interface NodeTable

getNodeIdForNode

public NodeId getNodeIdForNode(org.apache.jena.graph.Node node)

Find the NodeId for a node, or return NodeId.NodeDoesNotExist

Specified by:

getNodeIdForNode in interface NodeTable

getAllocateNodeId

public NodeId getAllocateNodeId(org.apache.jena.graph.Node node)

Find the NodeId for a node, allocating a new NodeId if the Node does not yet have a NodeId

Specified by:

getAllocateNodeId in interface NodeTable

containsNode

public boolean containsNode(org.apache.jena.graph.Node node)

Description copied from interface: NodeTable

Test whether the node table contains an entry for node

Specified by:

containsNode in interface NodeTable

containsNodeId

public boolean containsNodeId(NodeId nodeId)

Description copied from interface: NodeTable

Test whether the node table contains an entry for node

Specified by:

containsNodeId in interface NodeTable

allocOffset

public NodeId allocOffset()

Description copied from interface: NodeTable

The offset needed to predicate allocation difference between persistent tables - internal function

Specified by:

allocOffset in interface NodeTable

isEmpty

public boolean isEmpty()

Description copied from interface: NodeTable

Anything there?

Specified by:

isEmpty in interface NodeTable

close

public void close()

Specified by:

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

sync

public void sync()

Specified by:

sync in interface org.apache.jena.atlas.lib.Sync

all

public Iterator<org.apache.jena.atlas.lib.Pair<NodeId,org.apache.jena.graph.Node>> all()

Description copied from interface: NodeTable

Iterate over all nodes (not necessarily fast). Does not include inlined NodeIds

Specified by:

all in interface NodeTable

toString

public String toString()

Overrides:

toString in class Object