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AbstractType (Hibernate API Documentation) - Hibernate 2.1.8 正式版 API 英文文档

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net.sf.hibernate.type
Class AbstractType

java.lang.Object
  net.sf.hibernate.type.AbstractType

All Implemented Interfaces:

Serializable, Type

Direct Known Subclasses:

ComponentType, CompositeCustomType, CustomType, DynamicComponentType, EntityType, MetaType, NullableType, ObjectType, PersistentCollectionType

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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.
Object	copy(Object original, Object target, SessionImplementor session, Object owner, Map copiedAlready)
Serializable	disassemble(Object value, SessionImplementor session)           Return a cacheable "disassembled" representation of the object.
boolean	equals(Object object)
int	hashCode()
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	isAssociationType()           Return true if the implementation is castable to AssociationType.
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	isModified(Object old, Object current, SessionImplementor session)           Has the parent object been modified, compared to the current database state?
boolean	isObjectType()           Is this an "object" type.
boolean	isPersistentCollectionType()           Is this type a collection type.
Object	resolveIdentifier(Object value, SessionImplementor session, Object owner)           Map identifiers to entities or collections.

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface net.sf.hibernate.type.Type

deepCopy, equals, fromString, getColumnSpan, getName, getReturnedClass, hasNiceEquals, isMutable, nullSafeGet, nullSafeGet, nullSafeSet, sqlTypes, toString

 

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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isPersistentCollectionType

public boolean isPersistentCollectionType()

Description copied from interface: Type

Is this type a collection type.

Specified by:

isPersistentCollectionType 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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disassemble

public Serializable disassemble(Object value,
                                SessionImplementor session)
                         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

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:

SQLException

HibernateException

See Also:

Type.resolveIdentifier(Object, SessionImplementor, Object)

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resolveIdentifier

public Object resolveIdentifier(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:

resolveIdentifier 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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isObjectType

public boolean isObjectType()

Description copied from interface: Type

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

Specified by:

isObjectType in interface Type

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isModified

public boolean isModified(Object old,
                          Object current,
                          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

session -

Returns:

true if the field has been modified

Throws:

HibernateException

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copy

public Object copy(Object original,
                   Object target,
                   SessionImplementor session,
                   Object owner,
                   Map copiedAlready)
            throws HibernateException

Specified by:

copy in interface Type

Throws:

HibernateException

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equals

public boolean equals(Object object)

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hashCode

public int hashCode()

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