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PersistentArrayHolder (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.collection
Class PersistentArrayHolder

java.lang.Object
  org.hibernate.collection.AbstractPersistentCollection
      org.hibernate.collection.PersistentArrayHolder

All Implemented Interfaces:

PersistentCollection, Serializable

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public class PersistentArrayHolder

extends AbstractPersistentCollection

A persistent wrapper for an array. Lazy initialization is NOT supported. Use of Hibernate arrays is not really recommended.

Author:

Gavin King

See Also:

Serialized Form

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Nested Class Summary

 

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

AbstractPersistentCollection.DelayedOperation

 

Field Summary
protected  Object	array

 

Fields inherited from class org.hibernate.collection.AbstractPersistentCollection

UNKNOWN

 

Constructor Summary

PersistentArrayHolder(SessionImplementor session, CollectionPersister persister)

PersistentArrayHolder(SessionImplementor session, Object array)

 

Method Summary
void	beforeInitialize(CollectionPersister persister, int anticipatedSize)           Called before any elements are read into the collection, allowing appropriate initializations to occur.
void	beginRead()           Called just before reading any rows from the JDBC result set
Serializable	disassemble(CollectionPersister persister)           Disassemble the collection, ready for the cache
Iterator	elements()
boolean	empty()           Is the initialized collection empty?
boolean	endRead()           Called after reading all rows from the JDBC result set
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?
Object	getArray()
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 elemType)           Do we need to insert this element?
boolean	needsUpdating(Object entry, int i, Type elemType)           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, clearDirty, dirty, 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 Detail

array

protected Object array

Constructor Detail

PersistentArrayHolder

public PersistentArrayHolder(SessionImplementor session,
                             Object array)

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PersistentArrayHolder

public PersistentArrayHolder(SessionImplementor session,
                             CollectionPersister persister)
                      throws HibernateException

Method Detail

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

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isSnapshotEmpty

public boolean isSnapshotEmpty(Serializable snapshot)

Description copied from interface: PersistentCollection

Is the snapshot empty?

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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

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getArray

public Object getArray()

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isWrapper

public boolean isWrapper(Object collection)

Description copied from interface: PersistentCollection

Is this the wrapper for the given underlying collection instance?

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equalsSnapshot

public boolean equalsSnapshot(CollectionPersister persister)
                       throws HibernateException

Description copied from interface: PersistentCollection

Does the current state exactly match the snapshot?

Throws:

HibernateException

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elements

public Iterator elements()

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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

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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

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entries

public Iterator entries(CollectionPersister persister)

Description copied from interface: PersistentCollection

Iterate all collection entries, during update of the database

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beginRead

public void beginRead()

Description copied from class: AbstractPersistentCollection

Called just before reading any rows from the JDBC result set

Specified by:

beginRead in interface PersistentCollection

Overrides:

beginRead in class AbstractPersistentCollection

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endRead

public boolean endRead()

Description copied from class: AbstractPersistentCollection

Called after reading all rows from the JDBC result set

Specified by:

endRead in interface PersistentCollection

Overrides:

endRead in class AbstractPersistentCollection

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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.

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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

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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

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disassemble

public Serializable disassemble(CollectionPersister persister)
                         throws HibernateException

Description copied from interface: PersistentCollection

Disassemble the collection, ready for the cache

Throws:

HibernateException

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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

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getDeletes

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

Description copied from interface: PersistentCollection

Get all the elements that need deleting

Throws:

HibernateException

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needsInserting

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

Description copied from interface: PersistentCollection

Do we need to insert this element?

Throws:

HibernateException

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needsUpdating

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

Description copied from interface: PersistentCollection

Do we need to update this element?

Throws:

HibernateException

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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...

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getElement

public Object getElement(Object entry)

Description copied from interface: PersistentCollection

Get the value of the given collection entry

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getSnapshotElement

public Object getSnapshotElement(Object entry,
                                 int i)

Description copied from interface: PersistentCollection

Get the snapshot value of the given collection entry

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entryExists

public boolean entryExists(Object entry,
                           int i)

Description copied from interface: PersistentCollection

Does an element exist at this entry in the collection?

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