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

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org.hibernate.type
Class MapType

java.lang.Object
  org.hibernate.type.AbstractType
      org.hibernate.type.CollectionType
          org.hibernate.type.MapType

All Implemented Interfaces:

AssociationType, Serializable, Type

Direct Known Subclasses:

OrderedMapType, SortedMapType

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public class MapType

extends CollectionType

See Also:

Serialized Form

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Field Summary

 

Fields inherited from class org.hibernate.type.CollectionType

UNFETCHED_COLLECTION

 

Constructor Summary

MapType(String role, String propertyRef, boolean isEmbeddedInXML)

 

Method Summary
Iterator	getElementsIterator(Object collection)           Get an iterator over the element set of the collection in POJO mode
Class	getReturnedClass()           The class returned by nullSafeGet() methods.
Object	indexOf(Object collection, Object element)
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, Serializable key)           Instantiate an uninitialized collection wrapper or holder.
Object	replaceElements(Object original, Object target, 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 the naked collection instance in a wrapper, or instantiate a holder.

 

Methods inherited from class org.hibernate.type.CollectionType

assemble, compare, contains, deepCopy, disassemble, fromXMLNode, getAssociatedEntityName, getAssociatedJoinable, getCollection, getColumnSpan, getElementsIterator, getElementType, getForeignKeyDirection, getHashCode, getKeyOfOwner, getLHSPropertyName, getName, getOnCondition, getRHSUniqueKeyPropertyName, getRole, hasHolder, hydrate, initializeImmediately, instantiateResult, isAlwaysDirtyChecked, isArrayType, isAssociationType, isCollectionType, isDirty, isDirty, isEmbeddedInXML, isEqual, isModified, isMutable, isXMLElement, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, renderLoggableString, replace, resolve, semiResolve, setToXMLNode, sqlTypes, toColumnNullness, toLoggableString, toString, useLHSPrimaryKey

 

Methods inherited from class org.hibernate.type.AbstractType

beforeAssemble, getHashCode, getSemiResolvedType, isAnyType, isComponentType, isEntityType, isEqual, isSame, replace, replaceNode

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.hibernate.type.Type

beforeAssemble, getHashCode, getSemiResolvedType, isAnyType, isComponentType, isEntityType, isEqual, isSame, replace

 

Constructor Detail

MapType

public MapType(String role,
               String propertyRef,
               boolean isEmbeddedInXML)

Method Detail

instantiate

public PersistentCollection instantiate(SessionImplementor session,
                                        CollectionPersister persister,
                                        Serializable key)

Description copied from class: CollectionType

Instantiate an uninitialized collection wrapper or holder. Callers MUST add the holder to the persistence context!

Specified by:

instantiate in class CollectionType

Parameters:

session - The session from which the request is originating.

persister - The underlying collection persister (metadata)

key - The owner key.

Returns:

The instantiated collection.

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getReturnedClass

public Class getReturnedClass()

Description copied from interface: Type

The class returned by nullSafeGet() methods. This is used to establish the class of an array of this type.

Returns:

Class

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getElementsIterator

public Iterator getElementsIterator(Object collection)

Description copied from class: CollectionType

Get an iterator over the element set of the collection in POJO mode

Overrides:

getElementsIterator in class CollectionType

Parameters:

collection - The collection to be iterated

Returns:

The iterator.

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wrap

public PersistentCollection wrap(SessionImplementor session,
                                 Object collection)

Description copied from class: CollectionType

Wrap the naked collection instance in a wrapper, or instantiate a holder. Callers MUST add the holder to the persistence context!

Specified by:

wrap in class CollectionType

Parameters:

session - The session from which the request is originating.

collection - The bare collection to be wrapped.

Returns:

The wrapped collection.

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instantiate

public Object instantiate(int anticipatedSize)

Description copied from class: CollectionType

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

Specified by:

instantiate in class CollectionType

Parameters:

anticipatedSize - The anticipated size of the instaniated collection after we are done populating it.

Returns:

A newly instantiated collection to be wrapped.

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replaceElements

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

Description copied from class: CollectionType

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

Overrides:

replaceElements in class CollectionType

Parameters:

original - The 'source' of the replacement elements (where we copy from)

target - The target of the replacement elements (where we copy to)

owner - The owner of the collection being merged

copyCache - The map of elements already replaced.

session - The session from which the merge event originated.

Returns:

The merged collection.

Throws:

HibernateException

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indexOf

public Object indexOf(Object collection,
                      Object element)

Overrides:

indexOf in class CollectionType

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