org.apache.jackrabbit.core
Class ItemManager

java.lang.Object
  org.apache.jackrabbit.core.ItemManager

All Implemented Interfaces:

ItemLifeCycleListener, ItemStateListener, Dumpable

public class ItemManager
extends Object
implements ItemLifeCycleListener, Dumpable, ItemStateListener

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

The ItemManager's responsabilities 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

protected SessionImpl

session

Constructor Summary

protected

ItemManager(SessionItemStateManager itemStateProvider, HierarchyManager hierMgr, SessionImpl session, NodeDefinition rootNodeDef, NodeId rootNodeId) Creates a new per-session instance ItemManager instance.

Method Summary

protected VersionHistoryImpl	createVersionHistoryInstance(NodeId id, NodeState state, NodeDefinition def, ItemLifeCycleListener[] listeners) Create a version history instance.
protected VersionImpl	createVersionInstance(NodeId id, NodeState state, NodeDefinition def, ItemLifeCycleListener[] listeners) Create a version instance.
void	dump(PrintStream ps) Dumps the state of this instance in a human readable format for diagnostic purposes.
ItemImpl	getItem(ItemId id)
ItemImpl	getItem(ItemState state) Returns the item instance for the given item state.
ItemImpl	getItem(Path path)
void	itemCreated(ItemImpl item) Called when an ItemImpl instance has been created.
void	itemDestroyed(ItemId id, ItemImpl item) Called when an ItemImpl instance has been destroyed (i.e.
boolean	itemExists(ItemId id) Checks if the item with the given id exists.
boolean	itemExists(Path path) Checks if the item with the given path exists.
void	itemInvalidated(ItemId id, ItemImpl item) Called when an ItemImpl instance has been invalidated (i.e.
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.

Methods inherited from class java.lang.Object

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

Field Detail

session

protected final SessionImpl session

Constructor Detail

ItemManager

protected ItemManager(SessionItemStateManager itemStateProvider,
                      HierarchyManager hierMgr,
                      SessionImpl session,
                      NodeDefinition rootNodeDef,
                      NodeId rootNodeId)

Creates a new per-session instance ItemManager instance.

Parameters:

itemStateProvider - the item state provider associated with the new instance

session - the session associated with the new instance

rootNodeDef - the definition of the root node

rootNodeId - the id of the root node

Method Detail

itemExists

public boolean itemExists(Path path)

Checks if the item with the given path exists.

Parameters:

path - path to the item to be checked

Returns:

true if the specified item exists

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 PathNotFoundException,
                        AccessDeniedException,
                        RepositoryException

Parameters:

path -

Returns:

Throws:

PathNotFoundException

AccessDeniedException

RepositoryException

getItem

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

Parameters:

id -

Returns:

Throws:

RepositoryException

ItemNotFoundException

AccessDeniedException

getItem

public ItemImpl getItem(ItemState state)
                 throws ItemNotFoundException,
                        AccessDeniedException,
                        RepositoryException

Returns the item instance for the given item state.

Parameters:

state - the item state

Returns:

the item instance for the given item state.

Throws:

RepositoryException

ItemNotFoundException

AccessDeniedException

createVersionInstance

protected VersionImpl createVersionInstance(NodeId id,
                                            NodeState state,
                                            NodeDefinition def,
                                            ItemLifeCycleListener[] listeners)
                                     throws RepositoryException

Create a version instance.

Parameters:

id - node id

state - node state

def - node definition

listeners - listeners

Returns:

version instance

Throws:

RepositoryException - if an error occurs

createVersionHistoryInstance

protected VersionHistoryImpl createVersionHistoryInstance(NodeId id,
                                                          NodeState state,
                                                          NodeDefinition def,
                                                          ItemLifeCycleListener[] listeners)
                                                   throws RepositoryException

Create a version history instance.

Parameters:

id - node id

state - node state

def - node definition

listeners - listeners

Returns:

version instance

Throws:

RepositoryException - if an error occurs

itemCreated

public void itemCreated(ItemImpl item)

Called when an ItemImpl instance has been created.

Specified by:

itemCreated in interface ItemLifeCycleListener

Parameters:

item - the instance which has been created

itemInvalidated

public void itemInvalidated(ItemId id,
                            ItemImpl item)

Called when an ItemImpl instance has been invalidated (i.e. it has been temporarily rendered 'invalid').

Note that most Item, Node and Property methods will throw an InvalidItemStateException when called on an 'invalidated' item.

Specified by:

itemInvalidated in interface ItemLifeCycleListener

Parameters:

id - the id of the instance that has been discarded

item - the instance which has been discarded

itemDestroyed

public void itemDestroyed(ItemId id,
                          ItemImpl item)

Called when an ItemImpl instance has been destroyed (i.e. it has been permanently rendered 'invalid').

Note that most Item, Node and Property methods will throw an InvalidItemStateException when called on a 'destroyed' item.

Specified by:

itemDestroyed in interface ItemLifeCycleListener

Parameters:

id - the id of the instance that has been destroyed

item - the instance which has been destroyed

dump

public void dump(PrintStream ps)

Dumps the state of this instance in a human readable format for diagnostic purposes.

Specified by:

dump in interface Dumpable

Parameters:

ps - stream to dump state to

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()