org.apache.jackrabbit.core

Class ItemManager

java.lang.Object

org.apache.jackrabbit.core.ItemManager

All Implemented Interfaces:

ItemStateListener

public class ItemManager
extends Object
implements ItemStateListener

There's one ItemManager instance per Session instance. It is the factory for Node and Property instances.

The ItemManager's responsibilities are:

• providing access to Item instances by ItemId whereas Node and Item are only providing relative access.
• returning the instance of an existing Node or Property, given its absolute path.
• creating the per-session instance of a Node or Property that doesn't exist yet and needs to be created first.
• guaranteeing that there aren't multiple instances representing the same Node or Property associated with the same Session instance.
• maintaining a cache of the item instances it created.
• respecting access rights of associated Session in all methods.

If the parent Session is an XASession, there is one ItemManager instance per started global transaction.

Field Summary

Fields

Modifier and Type	Field and Description
protected SessionImpl	session
protected SessionContext	sessionContext Component context of the associated session.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ItemManager(SessionContext sessionContext) Creates a new per-session instance ItemManager instance.

Method Summary

Methods

Modifier and Type	Method and Description
ItemImpl	getItem(ItemId id)
ItemImpl	getItem(Path path) Deprecated. As of JSR 283, a Path doesn't anymore uniquely identify an Item, therefore getNode(Path) and getProperty(Path) should be used instead.
NodeImpl	getNode(NodeId id, NodeId parentId) Returns a node with a given id and parent id.
NodeImpl	getNode(Path path)
PropertyImpl	getProperty(Path path)
void	itemDestroyed(ItemId id, ItemData data)
boolean	itemExists(ItemId id) Checks if the item with the given id exists.
boolean	itemExists(Path path) Deprecated. As of JSR 283, a Path doesn't anymore uniquely identify an Item, therefore nodeExists(Path) and propertyExists(Path) should be used instead.
void	itemInvalidated(ItemId id, ItemData data)
boolean	nodeExists(Path path) Checks whether a node exists at the specified path.
boolean	propertyExists(Path path) Checks whether a property exists at the specified path.
void	stateCreated(ItemState created) Called when an ItemState has successfully been created (i.e.
void	stateDestroyed(ItemState destroyed) Called when an ItemState has successfully been removed (i.e.
void	stateDiscarded(ItemState discarded) Called when an ItemState has been discarded (i.e.
void	stateModified(ItemState modified) Called when an ItemState has successfully been modified (i.e.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

sessionContext

protected final SessionContext sessionContext

Component context of the associated session.

session

protected final SessionImpl session

Constructor Detail

ItemManager

protected ItemManager(SessionContext sessionContext)

Creates a new per-session instance ItemManager instance.

Parameters:

sessionContext - component context of the associated session

Method Detail

itemExists

public boolean itemExists(Path path)

Deprecated. As of JSR 283, a Path doesn't anymore uniquely identify an Item, therefore nodeExists(Path) and propertyExists(Path) should be used instead.

Checks whether an item exists at the specified path.

Parameters:

path - path to the item to be checked

Returns:

true if the specified item exists

nodeExists

public boolean nodeExists(Path path)

Checks whether a node exists at the specified path.

Parameters:

path - path to the node to be checked

Returns:

true if a node exists at the specified path

propertyExists

public boolean propertyExists(Path path)

Checks whether a property exists at the specified path.

Parameters:

path - path to the property to be checked

Returns:

true if a property exists at the specified path

itemExists

public boolean itemExists(ItemId id)

Checks if the item with the given id exists.

Parameters:

id - id of the item to be checked

Returns:

true if the specified item exists

getItem

public ItemImpl getItem(Path path)
                 throws javax.jcr.PathNotFoundException,
                        javax.jcr.AccessDeniedException,
                        javax.jcr.RepositoryException

Deprecated. As of JSR 283, a Path doesn't anymore uniquely identify an Item, therefore getNode(Path) and getProperty(Path) should be used instead.

Returns the node at the specified absolute path in the workspace. If no such node exists, then it returns the property at the specified path. If no such property exists a PathNotFoundException is thrown.

Parameters:

path -

Returns:

Throws:

javax.jcr.PathNotFoundException

javax.jcr.AccessDeniedException

javax.jcr.RepositoryException

getNode

public NodeImpl getNode(Path path)
                 throws javax.jcr.PathNotFoundException,
                        javax.jcr.AccessDeniedException,
                        javax.jcr.RepositoryException

Parameters:

path -

Returns:

Throws:

javax.jcr.PathNotFoundException

javax.jcr.AccessDeniedException

javax.jcr.RepositoryException

getProperty

public PropertyImpl getProperty(Path path)
                         throws javax.jcr.PathNotFoundException,
                                javax.jcr.AccessDeniedException,
                                javax.jcr.RepositoryException

Parameters:

path -

Returns:

Throws:

javax.jcr.PathNotFoundException

javax.jcr.AccessDeniedException

javax.jcr.RepositoryException

getItem

public ItemImpl getItem(ItemId id)
                 throws javax.jcr.ItemNotFoundException,
                        javax.jcr.AccessDeniedException,
                        javax.jcr.RepositoryException

Parameters:

id -

Returns:

Throws:

javax.jcr.RepositoryException

javax.jcr.ItemNotFoundException

javax.jcr.AccessDeniedException

getNode

public NodeImpl getNode(NodeId id,
               NodeId parentId)
                 throws javax.jcr.ItemNotFoundException,
                        javax.jcr.AccessDeniedException,
                        javax.jcr.RepositoryException

Returns a node with a given id and parent id. If the indicated node is shareable, there might be multiple nodes associated with the same id, but there'is only one node with the given parent id.

Parameters:

id - node id

parentId - parent node id

Returns:

node

Throws:

javax.jcr.RepositoryException - if an error occurs

javax.jcr.ItemNotFoundException

javax.jcr.AccessDeniedException

itemInvalidated

public void itemInvalidated(ItemId id,
                   ItemData data)

itemDestroyed

public void itemDestroyed(ItemId id,
                 ItemData data)

toString

public String toString()

Overrides:

toString in class Object

stateCreated

public void stateCreated(ItemState created)

Called when an ItemState has successfully been created (i.e. its underlying persistent state was created).

Specified by:

stateCreated in interface ItemStateListener

Parameters:

created - the ItemState that has been 'created'

stateModified

public void stateModified(ItemState modified)

Called when an ItemState has successfully been modified (i.e. its underlying persistent state has changed).

Specified by:

stateModified in interface ItemStateListener

Parameters:

modified - the ItemState that has been 'modified'

stateDestroyed

public void stateDestroyed(ItemState destroyed)

Called when an ItemState has successfully been removed (i.e. its underlying persistent state has been destroyed).

Specified by:

stateDestroyed in interface ItemStateListener

Parameters:

destroyed - the ItemState that has been 'destroyed'

stateDiscarded

public void stateDiscarded(ItemState discarded)

Called when an ItemState has been discarded (i.e. it has been rendered 'invalid').

Specified by:

stateDiscarded in interface ItemStateListener

Parameters:

discarded - the ItemState that has been discarded

See Also:

ItemState.discard()