Package org.hibernate.collection

Class PersistentElementHolder

java.lang.Object

org.hibernate.collection.AbstractPersistentCollection

org.hibernate.collection.PersistentElementHolder

All Implemented Interfaces:

Serializable, PersistentCollection

public class PersistentElementHolder
extends AbstractPersistentCollection

A persistent wrapper for an XML element

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.collection.AbstractPersistentCollection

AbstractPersistentCollection.DelayedOperation

Field Summary

Fields

Modifier and Type	Field	Description
protected org.dom4j.Element	element

Fields inherited from class org.hibernate.collection.AbstractPersistentCollection

UNKNOWN

Constructor Summary

Constructors

Constructor	Description
PersistentElementHolder(SessionImplementor session, org.dom4j.Element element)
PersistentElementHolder(SessionImplementor session, CollectionPersister persister, Serializable key)

Method Summary

Modifier and Type	Method	Description
void	beforeInitialize(CollectionPersister persister, int anticipatedSize)	Called before any elements are read into the collection, allowing appropriate initializations to occur.
Serializable	disassemble(CollectionPersister persister)	Disassemble the collection, ready for the cache
boolean	empty()	Is the initialized collection empty?
Iterator	entries(CollectionPersister persister)	Iterate all collection entries, during update of the database
boolean	entryExists(Object entry, int i)	Does an element exist at this entry in the collection?
boolean	equalsSnapshot(CollectionPersister persister)	Does the current state exactly match the snapshot?
Iterator	getDeletes(CollectionPersister persister, boolean indexIsFormula)	Get all the elements that need deleting
Object	getElement(Object entry)	Get the value of the given collection entry
Object	getIndex(Object entry, int i, CollectionPersister persister)	Get the index of the given collection entry
Collection	getOrphans(Serializable snapshot, String entityName)	get all "orphaned" elements
Serializable	getSnapshot(CollectionPersister persister)	Return a new snapshot of the current state of the collection
Object	getSnapshotElement(Object entry, int i)	Get the snapshot value of the given collection entry
Object	getValue()	return the user-visible collection (or array) instance
void	initializeFromCache(CollectionPersister persister, Serializable disassembled, Object owner)	Read the state of the collection from a disassembled cached value
boolean	isDirectlyAccessible()	Could the application possibly have a direct reference to the underlying collection implementation?
boolean	isSnapshotEmpty(Serializable snapshot)	Is the snapshot empty?
boolean	isWrapper(Object collection)	Is this the wrapper for the given underlying collection instance?
boolean	needsInserting(Object entry, int i, Type elementType)	Do we need to insert this element?
boolean	needsUpdating(Object entry, int i, Type elementType)	Do we need to update this element?
Object	readFrom(ResultSet rs, CollectionPersister persister, CollectionAliases descriptor, Object owner)	Read a row from the JDBC result set

Methods inherited from class org.hibernate.collection.AbstractPersistentCollection

afterInitialize, afterRowInsert, beginRead, clearDirty, dirty, endRead, forceInitialization, getCachedSize, getIdentifier, getKey, getOrphans, getOwner, getQueuedOrphans, getRole, getSession, getSnapshot, getStoredSnapshot, hasQueuedOperations, initialize, isClearQueueEnabled, isDirty, isOperationQueueEnabled, isPutQueueEnabled, isRowUpdatePossible, isUnreferenced, needsRecreate, performQueuedOperations, postAction, preInsert, queuedAdditionIterator, queueOperation, read, readElementByIndex, readElementExistence, readIndexExistence, readSize, setCurrentSession, setDirectlyAccessible, setInitialized, setOwner, setSnapshot, unsetSession, wasInitialized, write

Methods inherited from class java.lang.Object

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

Field Details

element

protected org.dom4j.Element element

Constructor Details

PersistentElementHolder

public PersistentElementHolder(SessionImplementor session,
 org.dom4j.Element element)

PersistentElementHolder

public PersistentElementHolder(SessionImplementor session,
 CollectionPersister persister,
 Serializable key)
                        throws HibernateException

Throws:

HibernateException

Method Details

getSnapshot

public Serializable getSnapshot(CollectionPersister persister)
                         throws HibernateException

Description copied from interface: PersistentCollection

Return a new snapshot of the current state of the collection

Throws:

HibernateException

getOrphans

public Collection getOrphans(Serializable snapshot,
 String entityName)
                      throws HibernateException

Description copied from class: AbstractPersistentCollection

get all "orphaned" elements

Specified by:

getOrphans in interface PersistentCollection

Specified by:

getOrphans in class AbstractPersistentCollection

Throws:

HibernateException

isWrapper

public boolean isWrapper(Object collection)

Description copied from interface: PersistentCollection

Is this the wrapper for the given underlying collection instance?

equalsSnapshot

public boolean equalsSnapshot(CollectionPersister persister)
                       throws HibernateException

Description copied from interface: PersistentCollection

Does the current state exactly match the snapshot?

Throws:

HibernateException

isSnapshotEmpty

public boolean isSnapshotEmpty(Serializable snapshot)

Description copied from interface: PersistentCollection

Is the snapshot empty?

empty

public boolean empty()

Description copied from class: AbstractPersistentCollection

Is the initialized collection empty?

Specified by:

empty in interface PersistentCollection

Specified by:

empty in class AbstractPersistentCollection

readFrom

public Object readFrom(ResultSet rs,
 CollectionPersister persister,
 CollectionAliases descriptor,
 Object owner)
                throws HibernateException,
SQLException

Description copied from interface: PersistentCollection

Read a row from the JDBC result set

Throws:

HibernateException

SQLException

entries

public Iterator entries(CollectionPersister persister)

Description copied from interface: PersistentCollection

Iterate all collection entries, during update of the database

beforeInitialize

public void beforeInitialize(CollectionPersister persister,
 int anticipatedSize)

Description copied from interface: PersistentCollection

Called before any elements are read into the collection, allowing appropriate initializations to occur.

Parameters:

persister - The underlying collection persister.

anticipatedSize - The anticipated size of the collection after initilization is complete.

isDirectlyAccessible

public boolean isDirectlyAccessible()

Description copied from class: AbstractPersistentCollection

Could the application possibly have a direct reference to the underlying collection implementation?

Specified by:

isDirectlyAccessible in interface PersistentCollection

Overrides:

isDirectlyAccessible in class AbstractPersistentCollection

initializeFromCache

public void initializeFromCache(CollectionPersister persister,
 Serializable disassembled,
 Object owner)
                         throws HibernateException

Description copied from interface: PersistentCollection

Read the state of the collection from a disassembled cached value

Throws:

HibernateException

disassemble

public Serializable disassemble(CollectionPersister persister)
                         throws HibernateException

Description copied from interface: PersistentCollection

Disassemble the collection, ready for the cache

Throws:

HibernateException

getValue

public Object getValue()

Description copied from class: AbstractPersistentCollection

return the user-visible collection (or array) instance

Specified by:

getValue in interface PersistentCollection

Overrides:

getValue in class AbstractPersistentCollection

getDeletes

public Iterator getDeletes(CollectionPersister persister,
 boolean indexIsFormula)
                    throws HibernateException

Description copied from interface: PersistentCollection

Get all the elements that need deleting

Throws:

HibernateException

needsInserting

public boolean needsInserting(Object entry,
 int i,
 Type elementType)
                       throws HibernateException

Description copied from interface: PersistentCollection

Do we need to insert this element?

Throws:

HibernateException

needsUpdating

public boolean needsUpdating(Object entry,
 int i,
 Type elementType)
                      throws HibernateException

Description copied from interface: PersistentCollection

Do we need to update this element?

Throws:

HibernateException

getIndex

public Object getIndex(Object entry,
 int i,
 CollectionPersister persister)

Description copied from interface: PersistentCollection

Get the index of the given collection entry

Parameters:

persister - it was more elegant before we added this...

getElement

public Object getElement(Object entry)

Description copied from interface: PersistentCollection

Get the value of the given collection entry

getSnapshotElement

public Object getSnapshotElement(Object entry,
 int i)

Description copied from interface: PersistentCollection

Get the snapshot value of the given collection entry

entryExists

public boolean entryExists(Object entry,
 int i)

Description copied from interface: PersistentCollection

Does an element exist at this entry in the collection?