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MutableType (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.type
Class MutableType

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

All Implemented Interfaces:

Serializable, Type

Direct Known Subclasses:

AbstractBynaryType, AbstractCharArrayType, CalendarDateType, CalendarType, DateType, SerializableType, TimestampType, TimeType

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public abstract class MutableType

extends NullableType

Superclass for mutable nullable types

Author:

Gavin King

See Also:

Serialized Form

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Constructor Summary

MutableType()

 

Method Summary
Object	deepCopy(Object value, EntityMode entityMode, SessionFactoryImplementor factory)           Return a deep copy of the persistent state, stopping at entities and at collections.
protected abstract  Object	deepCopyNotNull(Object value)
boolean	isMutable()           Are objects of this type mutable.
Object	replace(Object original, Object target, SessionImplementor session, Object owner, Map copyCache)           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.

 

Methods inherited from class org.hibernate.type.NullableType

fromStringValue, fromXMLNode, fromXMLString, get, getColumnSpan, isDirty, isEqual, isEqual, nullSafeGet, nullSafeGet, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, nullSafeSet, nullSafeToString, set, setToXMLNode, sqlType, sqlTypes, toColumnNullness, toLoggableString, toString, toXMLString

 

Methods inherited from class org.hibernate.type.AbstractType

assemble, beforeAssemble, compare, disassemble, getHashCode, getHashCode, getSemiResolvedType, hydrate, isAnyType, isAssociationType, isCollectionType, isComponentType, isDirty, isEntityType, isEqual, isModified, isSame, isXMLElement, replace, replaceNode, resolve, semiResolve

 

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

getName, getReturnedClass

 

Constructor Detail

MutableType

public MutableType()

Method Detail

isMutable

public final boolean isMutable()

Description copied from interface: Type

Are objects of this type mutable. (With respect to the referencing object ... entities and collections are considered immutable because they manage their own internal state.)

Returns:

boolean

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deepCopyNotNull

protected abstract Object deepCopyNotNull(Object value)
                                   throws HibernateException

Throws:

HibernateException

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deepCopy

public final Object deepCopy(Object value,
                             EntityMode entityMode,
                             SessionFactoryImplementor factory)
                      throws HibernateException

Description copied from interface: Type

Return a deep copy of the persistent state, stopping at entities and at collections.

Parameters:

value - generally a collection element or entity field

entityMode -

factory -

Returns:

Object a copy

Throws:

HibernateException

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replace

public Object replace(Object original,
                      Object target,
                      SessionImplementor session,
                      Object owner,
                      Map copyCache)
               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.

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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