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

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org.hibernate.usertype
Interface UserCollectionType

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public interface UserCollectionType

A custom type for mapping user-written classes that implement PersistentCollection

Author:

Gavin King

See Also:

PersistentCollection

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Method Summary
boolean	contains(Object collection, Object entity)           Optional operation.
Iterator	getElementsIterator(Object collection)           Return an iterator over the elements of this collection - the passed collection instance may or may not be a wrapper
Object	indexOf(Object collection, Object entity)           Optional operation.
Object	instantiate(int anticipatedSize)           Instantiate an empty instance of the "underlying" collection (not a wrapper), but with the given anticipated size (i.e.
PersistentCollection	instantiate(SessionImplementor session, CollectionPersister persister)           Instantiate an uninitialized instance of the collection wrapper
Object	replaceElements(Object original, Object target, CollectionPersister persister, Object owner, Map copyCache, SessionImplementor session)           Replace the elements of a collection with the elements of another collection
PersistentCollection	wrap(SessionImplementor session, Object collection)           Wrap an instance of a collection

 

Method Detail

instantiate

public PersistentCollection instantiate(SessionImplementor session,
                                        CollectionPersister persister)
                                 throws HibernateException

Instantiate an uninitialized instance of the collection wrapper

Throws:

HibernateException

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wrap

public PersistentCollection wrap(SessionImplementor session,
                                 Object collection)

Wrap an instance of a collection

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getElementsIterator

public Iterator getElementsIterator(Object collection)

Return an iterator over the elements of this collection - the passed collection instance may or may not be a wrapper

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contains

public boolean contains(Object collection,
                        Object entity)

Optional operation. Does the collection contain the entity instance?

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indexOf

public Object indexOf(Object collection,
                      Object entity)

Optional operation. Return the index of the entity in the collection.

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replaceElements

public Object replaceElements(Object original,
                              Object target,
                              CollectionPersister persister,
                              Object owner,
                              Map copyCache,
                              SessionImplementor session)
                       throws HibernateException

Replace the elements of a collection with the elements of another collection

Throws:

HibernateException

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instantiate

public Object instantiate(int anticipatedSize)

Instantiate an empty instance of the "underlying" collection (not a wrapper), but with the given anticipated size (i.e. accounting for initial size and perhaps load factor).

Parameters:

anticipatedSize - The anticipated size of the instaniated collection after we are done populating it. Note, may be negative to indicate that we not yet know anything about the anticipated size (i.e., when initializing from a result set row by row).

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