org.openanzo.common.ldap.container.map
Class BlankNodeIndex

java.lang.Object
  org.openanzo.common.ldap.container.map.BlankNodeIndex

public class BlankNodeIndex
extends java.lang.Object

Keeps track of blank nodes during query execution. The blank nodes are indexed by two multi-value keys: Key to blank node from information about statements...

• ...directed away from the blank node: {Ldap DN, Ldap attribute, predicate-URI}
• ...directed toward the blank node: {Ldap DN, extension-predicate-URI}.

Also provides reverse lookup so a Ldap DN can be found for a given blank node.

Author:

Joe Betz

Field Summary

java.util.Map<org.openanzo.common.ldap.container.map.BlankNodeIndex.AttributeNodeKey,org.openanzo.common.ldap.container.map.BlankNodeIndex.BlankNodeKey>	attributeNodeBindings
org.apache.commons.collections15.BidiMap<org.openanzo.common.ldap.container.map.BlankNodeIndex.BlankNodeKey,BlankNodeManager.BlankNode>	blankNodeBindings
BlankNodeManager	manager

Constructor Summary

BlankNodeIndex()

Method Summary

java.lang.String	getDn(BlankNodeManager.BlankNode blankNode) Returns the Ldap DN this blank node extends from, or null if the blank node is not set.
BlankNodeManager.BlankNode	getOrCreateBlankNode(java.lang.String dn, AttributeBinding binding) Gets the blank node corresponding to the provided Ldap DN and attribute binding.
BlankNodeManager.BlankNode	getOrCreateBlankNode(java.lang.String dn, java.net.URI uri) Gets the blank node corresponding to the provided Ldap DN and predicate URI connecting the root object to the blank node.

Methods inherited from class java.lang.Object

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

Field Detail

blankNodeBindings

public final org.apache.commons.collections15.BidiMap<org.openanzo.common.ldap.container.map.BlankNodeIndex.BlankNodeKey,BlankNodeManager.BlankNode> blankNodeBindings

attributeNodeBindings

public final java.util.Map<org.openanzo.common.ldap.container.map.BlankNodeIndex.AttributeNodeKey,org.openanzo.common.ldap.container.map.BlankNodeIndex.BlankNodeKey> attributeNodeBindings

manager

public BlankNodeManager manager

Constructor Detail

BlankNodeIndex

public BlankNodeIndex()

Method Detail

getOrCreateBlankNode

public BlankNodeManager.BlankNode getOrCreateBlankNode(java.lang.String dn,
                                                       AttributeBinding binding)

Gets the blank node corresponding to the provided Ldap DN and attribute binding. If the blank node does not yet exist, create a new one and return it.

Parameters:

dn - Ldap DN

binding - attribute binding

Returns:

a blank node

getDn

public java.lang.String getDn(BlankNodeManager.BlankNode blankNode)

Returns the Ldap DN this blank node extends from, or null if the blank node is not set.

Parameters:

blankNode -

Returns:

Ldap DN

getOrCreateBlankNode

public BlankNodeManager.BlankNode getOrCreateBlankNode(java.lang.String dn,
                                                       java.net.URI uri)

Gets the blank node corresponding to the provided Ldap DN and predicate URI connecting the root object to the blank node. If the blank node does not yet exist, create a new one and return it.

Parameters:

dn - Ldap DN

uri - URI

Returns:

a blank node