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

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org.hibernate.type
Class AbstractType

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

All Implemented Interfaces:

Serializable, Type

Direct Known Subclasses:

AnyType, BlobType, ClobType, CollectionType, ComponentType, CompositeCustomType, CustomType, EntityType, MetaType, NullableType

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public abstract class AbstractType

extends Object

implements Type

Abstract superclass of the built in Type hierarchy.

Author:

Gavin King

See Also:

Serialized Form

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Constructor Summary

AbstractType()

 

Method Summary
Object	assemble(Serializable cached, SessionImplementor session, Object owner)           Reconstruct the object from its cached "disassembled" state.
void	beforeAssemble(Serializable cached, SessionImplementor session)           Called before assembling a query result set from the query cache, to allow batch fetching of entities missing from the second-level cache.
int	compare(Object x, Object y, EntityMode entityMode)           compare two instances of the type
Serializable	disassemble(Object value, SessionImplementor session, Object owner)           Return a cacheable "disassembled" representation of the object.
int	getHashCode(Object x, EntityMode entityMode)           Get a hashcode, consistent with persistence "equality"
int	getHashCode(Object x, EntityMode entityMode, SessionFactoryImplementor factory)           Get a hashcode, consistent with persistence "equality"
Type	getSemiResolvedType(SessionFactoryImplementor factory)           Get the type of a semi-resolved value.
Object	hydrate(ResultSet rs, String[] names, SessionImplementor session, Object owner)           Retrieve an instance of the mapped class, or the identifier of an entity or collection, from a JDBC resultset.
boolean	isAnyType()           Is this an "any" type.
boolean	isAssociationType()           Return true if the implementation is castable to AssociationType.
boolean	isCollectionType()           Is this type a collection type.
boolean	isComponentType()           Is this type a component type.
boolean	isDirty(Object old, Object current, SessionImplementor session)           Should the parent be considered dirty, given both the old and current field or element value?
boolean	isEntityType()           Is this type an entity type?
boolean	isEqual(Object x, Object y, EntityMode entityMode)           Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.
boolean	isEqual(Object x, Object y, EntityMode entityMode, SessionFactoryImplementor factory)           Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.
boolean	isModified(Object old, Object current, boolean[] checkable, SessionImplementor session)           Has the parent object been modified, compared to the current database state?
boolean	isSame(Object x, Object y, EntityMode entityMode)           Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state - taking a shortcut for entity references.
boolean	isXMLElement()
Object	replace(Object original, Object target, SessionImplementor session, Object owner, Map copyCache, ForeignKeyDirection foreignKeyDirection)           During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging.
protected static void	replaceNode(org.dom4j.Node container, org.dom4j.Element value)
Object	resolve(Object value, SessionImplementor session, Object owner)           Map identifiers to entities or collections.
Object	semiResolve(Object value, SessionImplementor session, Object owner)           Given a hydrated, but unresolved value, return a value that may be used to reconstruct property-ref associations.

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.hibernate.type.Type

deepCopy, fromXMLNode, getColumnSpan, getName, getReturnedClass, isDirty, isMutable, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, replace, setToXMLNode, sqlTypes, toColumnNullness, toLoggableString

 

Constructor Detail

AbstractType

public AbstractType()

Method Detail

isAssociationType

public boolean isAssociationType()

Description copied from interface: Type

Return true if the implementation is castable to AssociationType. This does not necessarily imply that the type actually represents an association.

Specified by:

isAssociationType in interface Type

Returns:

boolean

See Also:

AssociationType

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isCollectionType

public boolean isCollectionType()

Description copied from interface: Type

Is this type a collection type.

Specified by:

isCollectionType in interface Type

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isComponentType

public boolean isComponentType()

Description copied from interface: Type

Is this type a component type. If so, the implementation must be castable to AbstractComponentType. A component type may own collections or associations and hence must provide certain extra functionality.

Specified by:

isComponentType in interface Type

Returns:

boolean

See Also:

AbstractComponentType

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isEntityType

public boolean isEntityType()

Description copied from interface: Type

Is this type an entity type?

Specified by:

isEntityType in interface Type

Returns:

boolean

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isXMLElement

public boolean isXMLElement()

Specified by:

isXMLElement in interface Type

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compare

public int compare(Object x,
                   Object y,
                   EntityMode entityMode)

Description copied from interface: Type

compare two instances of the type

Specified by:

compare in interface Type

Parameters:

entityMode -

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disassemble

public Serializable disassemble(Object value,
                                SessionImplementor session,
                                Object owner)
                         throws HibernateException

Description copied from interface: Type

Return a cacheable "disassembled" representation of the object.

Specified by:

disassemble in interface Type

Parameters:

value - the value to cache

session - the session

owner - optional parent entity object (needed for collections)

Returns:

the disassembled, deep cloned state

Throws:

HibernateException

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assemble

public Object assemble(Serializable cached,
                       SessionImplementor session,
                       Object owner)
                throws HibernateException

Description copied from interface: Type

Reconstruct the object from its cached "disassembled" state.

Specified by:

assemble in interface Type

Parameters:

cached - the disassembled state from the cache

session - the session

owner - the parent entity object

Returns:

the the object

Throws:

HibernateException

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isDirty

public boolean isDirty(Object old,
                       Object current,
                       SessionImplementor session)
                throws HibernateException

Description copied from interface: Type

Should the parent be considered dirty, given both the old and current field or element value?

Specified by:

isDirty in interface Type

Parameters:

old - the old value

current - the current value

session -

Returns:

true if the field is dirty

Throws:

HibernateException

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hydrate

public Object hydrate(ResultSet rs,
                      String[] names,
                      SessionImplementor session,
                      Object owner)
               throws HibernateException,
                      SQLException

Description copied from interface: Type

Retrieve an instance of the mapped class, or the identifier of an entity or collection, from a JDBC resultset. This is useful for 2-phase property initialization - the second phase is a call to resolveIdentifier().

Specified by:

hydrate in interface Type

Parameters:

rs -

names - the column names

session - the session

owner - the parent entity

Returns:

Object an identifier or actual value

Throws:

HibernateException

SQLException

See Also:

Type.resolve(Object, SessionImplementor, Object)

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resolve

public Object resolve(Object value,
                      SessionImplementor session,
                      Object owner)
               throws HibernateException

Description copied from interface: Type

Map identifiers to entities or collections. This is the second phase of 2-phase property initialization.

Specified by:

resolve in interface Type

Parameters:

value - an identifier or value returned by hydrate()

owner - the parent entity

session - the session

Returns:

the given value, or the value associated with the identifier

Throws:

HibernateException

See Also:

Type.hydrate(ResultSet, String[], SessionImplementor, Object)

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semiResolve

public Object semiResolve(Object value,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException

Description copied from interface: Type

Given a hydrated, but unresolved value, return a value that may be used to reconstruct property-ref associations.

Specified by:

semiResolve in interface Type

Throws:

HibernateException

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isAnyType

public boolean isAnyType()

Description copied from interface: Type

Is this an "any" type. i.e. a reference to a persistent entity that is not modelled as a (foreign key) association.

Specified by:

isAnyType in interface Type

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isModified

public boolean isModified(Object old,
                          Object current,
                          boolean[] checkable,
                          SessionImplementor session)
                   throws HibernateException

Description copied from interface: Type

Has the parent object been modified, compared to the current database state?

Specified by:

isModified in interface Type

Parameters:

old - the database state, in a "hydrated" form, with identifiers unresolved

current - the current state of the object

checkable - which columns are actually updatable

session -

Returns:

true if the field has been modified

Throws:

HibernateException

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isSame

public boolean isSame(Object x,
                      Object y,
                      EntityMode entityMode)
               throws HibernateException

Description copied from interface: Type

Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state - taking a shortcut for entity references.

Specified by:

isSame in interface Type

Parameters:

x -

y -

entityMode -

Returns:

boolean

Throws:

HibernateException

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isEqual

public boolean isEqual(Object x,
                       Object y,
                       EntityMode entityMode)

Description copied from interface: Type

Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.

Specified by:

isEqual in interface Type

Parameters:

x -

y -

entityMode -

Returns:

boolean

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getHashCode

public int getHashCode(Object x,
                       EntityMode entityMode)

Description copied from interface: Type

Get a hashcode, consistent with persistence "equality"

Specified by:

getHashCode in interface Type

Parameters:

x -

entityMode -

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isEqual

public boolean isEqual(Object x,
                       Object y,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)

Description copied from interface: Type

Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.

Specified by:

isEqual in interface Type

Parameters:

x -

y -

entityMode -

Returns:

boolean

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getHashCode

public int getHashCode(Object x,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)

Description copied from interface: Type

Get a hashcode, consistent with persistence "equality"

Specified by:

getHashCode in interface Type

Parameters:

x -

entityMode -

factory -

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replaceNode

protected static void replaceNode(org.dom4j.Node container,
                                  org.dom4j.Element value)

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getSemiResolvedType

public Type getSemiResolvedType(SessionFactoryImplementor factory)

Description copied from interface: Type

Get the type of a semi-resolved value.

Specified by:

getSemiResolvedType in interface Type

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replace

public Object replace(Object original,
                      Object target,
                      SessionImplementor session,
                      Object owner,
                      Map copyCache,
                      ForeignKeyDirection foreignKeyDirection)
               throws HibernateException

Description copied from interface: Type

During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging. For immutable objects, or null values, it is safe to simply return the first parameter. For mutable objects, it is safe to return a copy of the first parameter. For objects with component values, it might make sense to recursively replace component values.

Specified by:

replace in interface Type

Parameters:

original - the value from the detached entity being merged

target - the value in the managed entity

Returns:

the value to be merged

Throws:

HibernateException

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beforeAssemble

public void beforeAssemble(Serializable cached,
                           SessionImplementor session)

Description copied from interface: Type

Called before assembling a query result set from the query cache, to allow batch fetching of entities missing from the second-level cache.

Specified by:

beforeAssemble in interface Type

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Overview  Package   Class  Use  Tree  Deprecated  Index  Help
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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