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

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net.sf.hibernate.type
Class OneToOneType

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

All Implemented Interfaces:

AssociationType, Serializable, Type

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public class OneToOneType

extends EntityType

A one-to-one association to an entity

Author:

Gavin King

See Also:

Serialized Form

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Field Summary

 

Fields inherited from class net.sf.hibernate.type.EntityType

uniqueKeyPropertyName

 

Constructor Summary

OneToOneType(Class persistentClass, ForeignKeyDirection foreignKeyType, String uniqueKeyPropertyName)

 

Method Summary
Object	assemble(Serializable oid, SessionImplementor session, Object owner)           Reconstruct the object from its cached "disassembled" state.
Serializable	disassemble(Object value, SessionImplementor session)           Return a cacheable "disassembled" representation of the object.
int	getColumnSpan(Mapping session)           How many columns are used to persist this type.
ForeignKeyDirection	getForeignKeyDirection()           Get the foreign key directionality of this association
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	isDirty(Object old, Object current, SessionImplementor session)           Should the parent be considered dirty, given both the old and current field or element value?
boolean	isModified(Object old, Object current, SessionImplementor session)           Has the parent object been modified, compared to the current database state?
boolean	isNullable()
boolean	isOneToOne()
void	nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)           Write an instance of the mapped class to a prepared statement.
protected  Object	resolveIdentifier(Serializable id, SessionImplementor session)           Resolve an identifier
int[]	sqlTypes(Mapping session)           Return the SQL type codes for the columns mapped by this type.
boolean	usePrimaryKeyAsForeignKey()           Is the foreign key the primary key of the table?

 

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

copy, deepCopy, equals, equals, fromString, getAssociatedClass, getAssociatedClass, getIdentifier, getIdentifierOrUniqueKeyPropertyName, getIdentifierOrUniqueKeyType, getJoinable, getName, getPersistentClass, getReferencedColumns, getReturnedClass, hashCode, hasNiceEquals, isAssociationType, isEntityType, isMutable, isUniqueKeyReference, nullSafeGet, nullSafeGet, resolveIdentifier, toString

 

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

isComponentType, 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.Type

isComponentType, isObjectType, isPersistentCollectionType

 

Constructor Detail

OneToOneType

public OneToOneType(Class persistentClass,
                    ForeignKeyDirection foreignKeyType,
                    String uniqueKeyPropertyName)

Method Detail

getColumnSpan

public int getColumnSpan(Mapping session)
                  throws MappingException

Description copied from interface: Type

How many columns are used to persist this type.

Throws:

MappingException

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sqlTypes

public int[] sqlTypes(Mapping session)
               throws MappingException

Description copied from interface: Type

Return the SQL type codes for the columns mapped by this type. The codes are defined on java.sql.Types.

Returns:

the typecodes

Throws:

MappingException

See Also:

Types

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nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int index,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException

Description copied from interface: Type

Write an instance of the mapped class to a prepared statement. Implementors should handle possibility of null values. A multi-column type should be written to parameters starting from index.

Parameters:

st -

value - the object to write

index - statement parameter index

session -

Throws:

SQLException

HibernateException

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isOneToOne

public boolean isOneToOne()

Specified by:

isOneToOne in class EntityType

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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 EntityType

Throws:

HibernateException

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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

Overrides:

isModified in class AbstractType

Throws:

HibernateException

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getForeignKeyDirection

public ForeignKeyDirection getForeignKeyDirection()

Description copied from interface: AssociationType

Get the foreign key directionality of this association

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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

Specified by:

hydrate in class EntityType

Throws:

HibernateException

SQLException

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resolveIdentifier

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

Description copied from class: EntityType

Resolve an identifier

Specified by:

resolveIdentifier in class EntityType

Throws:

HibernateException

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isNullable

public boolean isNullable()

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usePrimaryKeyAsForeignKey

public boolean usePrimaryKeyAsForeignKey()

Description copied from interface: AssociationType

Is the foreign key the primary key of the table?

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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

Overrides:

disassemble in class AbstractType

Throws:

HibernateException

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assemble

public Object assemble(Serializable oid,
                       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

Overrides:

assemble in class AbstractType

Throws:

HibernateException

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