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

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net.sf.hibernate.type
Class EntityType

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

All Implemented Interfaces:

AssociationType, Serializable, Type

Direct Known Subclasses:

ManyToOneType, OneToOneType

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public abstract class EntityType

extends AbstractType

implements AssociationType

A reference to an entity class

Author:

Gavin King

See Also:

Serialized Form

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Field Summary
protected  String	uniqueKeyPropertyName

 

Constructor Summary
protected	EntityType(Class persistentClass, String uniqueKeyPropertyName)

 

Method Summary
Object	copy(Object original, Object target, SessionImplementor session, Object owner, Map copiedAlready)
Object	deepCopy(Object value)           Return a deep copy of the persistent state, stopping at entities and at collections.
boolean	equals(Object object)
boolean	equals(Object x, Object y)           Compare two instances of the class mapped by this type for persistence "equality", ie.
Object	fromString(String xml)           Parse the XML representation of an instance.
Class	getAssociatedClass()
Class	getAssociatedClass(SessionFactoryImplementor factory)
protected  Object	getIdentifier(Object value, SessionImplementor session)
String	getIdentifierOrUniqueKeyPropertyName(SessionFactoryImplementor factory)
Type	getIdentifierOrUniqueKeyType(SessionFactoryImplementor factory)
Joinable	getJoinable(SessionFactoryImplementor factory)           Get the "persister" for this association - a class or collection persister
String	getName()           Returns the abbreviated name of the type.
Class	getPersistentClass()           Deprecated. use getAssociationClass()
String[]	getReferencedColumns(SessionFactoryImplementor factory)           Get the columns referenced by this association.
Class	getReturnedClass()           This returns the wrong class for an entity with a proxy.
int	hashCode()
boolean	hasNiceEquals()           Does this type implement a well-behaved equals() method.
abstract  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	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	isMutable()           Are objects of this type mutable.
abstract  boolean	isOneToOne()
boolean	isUniqueKeyReference()
Object	nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)           Retrieve an instance of the mapped class from a JDBC resultset.
Object	nullSafeGet(ResultSet rs, String name, SessionImplementor session, Object owner)           Retrieve an instance of the mapped class from a JDBC resultset.
Object	resolveIdentifier(Object value, SessionImplementor session, Object owner)           Resolve an identifier or unique key value
protected abstract  Object	resolveIdentifier(Serializable id, SessionImplementor session)           Resolve an identifier
String	toString(Object value, SessionFactoryImplementor factory)           A representation of the value to be embedded in an XML element.

 

Methods inherited from class net.sf.hibernate.type.AbstractType

assemble, disassemble, isComponentType, isModified, isObjectType, isPersistentCollectionType

 

Methods inherited from class java.lang.Object

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

 

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

getForeignKeyDirection, usePrimaryKeyAsForeignKey

 

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

assemble, disassemble, getColumnSpan, isComponentType, isModified, isObjectType, isPersistentCollectionType, nullSafeSet, sqlTypes

 

Field Detail

uniqueKeyPropertyName

protected final String uniqueKeyPropertyName

Constructor Detail

EntityType

protected EntityType(Class persistentClass,
                     String uniqueKeyPropertyName)

Method Detail

isEntityType

public final boolean isEntityType()

Description copied from interface: Type

Is this type an entity type?

Specified by:

isEntityType in interface Type

Overrides:

isEntityType in class AbstractType

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getAssociatedClass

public final Class getAssociatedClass()

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equals

public final boolean equals(Object x,
                            Object y)

Description copied from interface: Type

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

Specified by:

equals in interface Type

Parameters:

x -

y -

Returns:

boolean

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nullSafeGet

public Object nullSafeGet(ResultSet rs,
                          String name,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException

Description copied from interface: Type

Retrieve an instance of the mapped class from a JDBC resultset. Implementations should handle possibility of null values. This method might be called if the type is known to be a single-column type.

Specified by:

nullSafeGet in interface Type

Parameters:

rs -

name - the column name

session -

owner - the parent entity

Returns:

Object

Throws:

SQLException

HibernateException

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getReturnedClass

public final Class getReturnedClass()

This returns the wrong class for an entity with a proxy. Theoretically it should return the proxy class, but it doesn't.

Specified by:

getReturnedClass in interface Type

Returns:

Class

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getIdentifier

protected final Object getIdentifier(Object value,
                                     SessionImplementor session)
                              throws HibernateException

Throws:

HibernateException

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toString

public String toString(Object value,
                       SessionFactoryImplementor factory)
                throws HibernateException

Description copied from interface: Type

A representation of the value to be embedded in an XML element.

Specified by:

toString in interface Type

Parameters:

value -

factory -

Returns:

String

Throws:

HibernateException

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fromString

public Object fromString(String xml)
                  throws HibernateException

Description copied from interface: Type

Parse the XML representation of an instance.

Specified by:

fromString in interface Type

Parameters:

xml -

Returns:

an instance of the type

Throws:

HibernateException

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getName

public String getName()

Description copied from interface: Type

Returns the abbreviated name of the type.

Specified by:

getName in interface Type

Returns:

String the Hibernate type name

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deepCopy

public Object deepCopy(Object value)

Description copied from interface: Type

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

Specified by:

deepCopy in interface Type

Parameters:

value - generally a collection element or entity field

Returns:

Object a copy

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isMutable

public 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.)

Specified by:

isMutable in interface Type

Returns:

boolean

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isOneToOne

public abstract boolean isOneToOne()

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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

Overrides:

copy in class AbstractType

Throws:

HibernateException

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hasNiceEquals

public boolean hasNiceEquals()

Description copied from interface: Type

Does this type implement a well-behaved equals() method. (ie. one that is consistent with Type.equals().) Strictly, if this method returns true then x.equals(y) implies Type.equals(x, y) and also Type.equals(x, y) implies that probably x.equals(y)

Specified by:

hasNiceEquals in interface Type

See Also:

Object.equals(java.lang.Object), Type.equals(java.lang.Object, java.lang.Object)

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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

Overrides:

isAssociationType in class AbstractType

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nullSafeGet

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

Description copied from interface: Type

Retrieve an instance of the mapped class from a JDBC resultset. Implementors should handle possibility of null values.

Specified by:

nullSafeGet in interface Type

Parameters:

rs -

names - the column names

session -

owner - the parent entity

Returns:

Object

Throws:

HibernateException

SQLException

See Also:

alternative, 2-phase property initialization

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hydrate

public abstract 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

Overrides:

hydrate in class AbstractType

Throws:

HibernateException

SQLException

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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

Overrides:

isDirty in class AbstractType

Throws:

HibernateException

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isUniqueKeyReference

public boolean isUniqueKeyReference()

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getJoinable

public Joinable getJoinable(SessionFactoryImplementor factory)
                     throws MappingException

Description copied from interface: AssociationType

Get the "persister" for this association - a class or collection persister

Specified by:

getJoinable in interface AssociationType

Throws:

MappingException

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getReferencedColumns

public String[] getReferencedColumns(SessionFactoryImplementor factory)
                              throws MappingException

Description copied from interface: AssociationType

Get the columns referenced by this association.

Specified by:

getReferencedColumns in interface AssociationType

Throws:

MappingException

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getIdentifierOrUniqueKeyType

public final Type getIdentifierOrUniqueKeyType(SessionFactoryImplementor factory)
                                        throws MappingException

Throws:

MappingException

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getIdentifierOrUniqueKeyPropertyName

public final String getIdentifierOrUniqueKeyPropertyName(SessionFactoryImplementor factory)
                                                  throws MappingException

Throws:

MappingException

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resolveIdentifier

protected abstract Object resolveIdentifier(Serializable id,
                                            SessionImplementor session)
                                     throws HibernateException

Resolve an identifier

Throws:

HibernateException

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resolveIdentifier

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

Resolve an identifier or unique key value

Specified by:

resolveIdentifier in interface Type

Overrides:

resolveIdentifier in class AbstractType

Throws:

HibernateException

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getAssociatedClass

public Class getAssociatedClass(SessionFactoryImplementor factory)

Specified by:

getAssociatedClass in interface AssociationType

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getPersistentClass

public Class getPersistentClass()

Deprecated. use getAssociationClass()

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equals

public boolean equals(Object object)

Overrides:

equals in class AbstractType

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hashCode

public int hashCode()

Overrides:

hashCode in class AbstractType

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