org.hibernate.type

Class OneToOneType

java.lang.Object

org.hibernate.type.AbstractType

org.hibernate.type.EntityType

org.hibernate.type.OneToOneType

All Implemented Interfaces:

Serializable, AssociationType, Type

Direct Known Subclasses:

SpecialOneToOneType

public class OneToOneType
extends EntityType

A one-to-one association to an entity

Author:

Gavin King

See Also:

Serialized Form

Field Summary

Fields inherited from class org.hibernate.type.EntityType

isEmbeddedInXML, uniqueKeyPropertyName

Fields inherited from class org.hibernate.type.AbstractType

LEGACY_DEFAULT_SIZE, LEGACY_DICTATED_SIZE

Constructor Summary

Constructors

Constructor and Description
OneToOneType(TypeFactory.TypeScope scope, String referencedEntityName, ForeignKeyDirection foreignKeyType, String uniqueKeyPropertyName, boolean lazy, boolean unwrapProxy, boolean isEmbeddedInXML, String entityName, String propertyName)

Method Summary

Methods

Modifier and Type	Method and Description
Object	assemble(Serializable oid, SessionImplementor session, Object owner) Reconstruct the object from its disassembled state.
Size[]	defaultSizes(Mapping mapping) Defines the column sizes to use according to this type if the user did not explicitly say (and if no Type.dictatedSizes(org.hibernate.engine.spi.Mapping) were given).
Size[]	dictatedSizes(Mapping mapping) Return the column sizes dictated by this type.
Serializable	disassemble(Object value, SessionImplementor session, Object owner) Return a 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
String	getPropertyName()
Object	hydrate(ResultSet rs, String[] names, SessionImplementor session, Object owner) Extract a value from the JDBC result set.
boolean	isAlwaysDirtyChecked() We don't need to dirty check one-to-one because of how assemble/disassemble is implemented and because a one-to-one association is never dirty
boolean	isDirty(Object old, Object current, boolean[] checkable, SessionImplementor session) Should the parent be considered dirty, given both the old and current value?
boolean	isDirty(Object old, Object current, SessionImplementor session) Should the parent be considered dirty, given both the old and current value?
boolean	isModified(Object old, Object current, boolean[] checkable, SessionImplementor session) Has the value been modified compared to the current database state? The difference between this and the Type.isDirty(java.lang.Object, java.lang.Object, org.hibernate.engine.spi.SessionImplementor) methods is that here we need to account for "partially" built values.
boolean	isNull(Object owner, SessionImplementor session)
protected boolean	isNullable()
boolean	isOneToOne() Is the association modeled here defined as a 1-1 in the database (physical model)?
void	nullSafeSet(PreparedStatement st, Object value, int index, boolean[] settable, SessionImplementor session) Bind a value represented by an instance of the mapped class to the JDBC prepared statement, ignoring some columns as dictated by the 'settable' parameter.
void	nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session) Bind a value represented by an instance of the mapped class to the JDBC prepared statement.
int[]	sqlTypes(Mapping session) Return the JDBC types codes (per Types) for the columns mapped by this type.
boolean[]	toColumnNullness(Object value, Mapping mapping) Given an instance of the type, return an array of boolean, indicating which mapped columns would be null.
boolean	useLHSPrimaryKey() Is the primary key of the owning entity table to be used in the join?

Methods inherited from class org.hibernate.type.EntityType

compare, deepCopy, fromXMLNode, getAssociatedEntityName, getAssociatedEntityName, getAssociatedJoinable, getHashCode, getIdentifier, getIdentifierOrUniqueKeyPropertyName, getIdentifierOrUniqueKeyType, getLHSPropertyName, getName, getOnCondition, getReturnedClass, getRHSUniqueKeyPropertyName, getSemiResolvedType, isAssociationType, isEmbeddedInXML, isEntityType, isEqual, isLogicalOneToOne, isMutable, isNotEmbedded, isReferenceToPrimaryKey, isSame, isXMLElement, loadByUniqueKey, nullSafeGet, nullSafeGet, replace, resolve, resolveIdentifier, scope, setToXMLNode, toLoggableString, toString

Methods inherited from class org.hibernate.type.AbstractType

beforeAssemble, getHashCode, isAnyType, isCollectionType, isComponentType, isEqual, replace, replaceNode, semiResolve

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.type.Type

beforeAssemble, getHashCode, isAnyType, isCollectionType, isComponentType, isEqual, replace, semiResolve

Constructor Detail

OneToOneType

public OneToOneType(TypeFactory.TypeScope scope,
            String referencedEntityName,
            ForeignKeyDirection foreignKeyType,
            String uniqueKeyPropertyName,
            boolean lazy,
            boolean unwrapProxy,
            boolean isEmbeddedInXML,
            String entityName,
            String propertyName)

Method Detail

getPropertyName

public String getPropertyName()

Overrides:

getPropertyName in class EntityType

isNull

public boolean isNull(Object owner,
             SessionImplementor session)

Overrides:

isNull in class EntityType

getColumnSpan

public int getColumnSpan(Mapping session)
                  throws MappingException

Description copied from interface: Type

How many columns are used to persist this type. Always the same as sqlTypes(mapping).length

Parameters:

session - The mapping object :/

Returns:

The number of columns

Throws:

MappingException - Generally indicates an issue accessing the passed mapping object.

sqlTypes

public int[] sqlTypes(Mapping session)
               throws MappingException

Description copied from interface: Type

Return the JDBC types codes (per Types) for the columns mapped by this type.

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Parameters:

session - The mapping object :/

Returns:

The JDBC type codes.

Throws:

MappingException - Generally indicates an issue accessing the passed mapping object.

dictatedSizes

public Size[] dictatedSizes(Mapping mapping)
                     throws MappingException

Description copied from interface: Type

Return the column sizes dictated by this type. For example, the mapping for a char/Character would have a dictated length limit of 1; for a string-based UUID would have a size limit of 36; etc.

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Parameters:

mapping - The mapping object :/

Returns:

The dictated sizes.

Throws:

MappingException - Generally indicates an issue accessing the passed mapping object.

defaultSizes

public Size[] defaultSizes(Mapping mapping)
                    throws MappingException

Description copied from interface: Type

Defines the column sizes to use according to this type if the user did not explicitly say (and if no Type.dictatedSizes(org.hibernate.engine.spi.Mapping) were given).

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Parameters:

mapping - The mapping object :/

Returns:

The default sizes.

Throws:

MappingException - Generally indicates an issue accessing the passed mapping object.

toColumnNullness

public boolean[] toColumnNullness(Object value,
                         Mapping mapping)

Description copied from interface: Type

Given an instance of the type, return an array of boolean, indicating which mapped columns would be null.

Parameters:

value - an instance of the type

mapping - The mapping abstraction

Returns:

array indicating column nullness for a value instance

nullSafeSet

public void nullSafeSet(PreparedStatement st,
               Object value,
               int index,
               boolean[] settable,
               SessionImplementor session)

Description copied from interface: Type

Bind a value represented by an instance of the mapped class to the JDBC prepared statement, ignoring some columns as dictated by the 'settable' parameter. Implementors should handle the possibility of null values. A multi-column type should bind parameters starting from index.

Parameters:

st - The JDBC prepared statement to which to bind

value - the object to write

index - starting parameter bind index

settable - an array indicating which columns to bind/ignore

session - The originating session

nullSafeSet

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

Description copied from interface: Type

Bind a value represented by an instance of the mapped class to the JDBC prepared statement. Implementors should handle possibility of null values. A multi-column type should bind parameters starting from index.

Parameters:

st - The JDBC prepared statement to which to bind

value - the object to write

index - starting parameter bind index

session - The originating session

isOneToOne

public boolean isOneToOne()

Description copied from class: EntityType

Is the association modeled here defined as a 1-1 in the database (physical model)?

Specified by:

isOneToOne in class EntityType

Returns:

True if a 1-1 in the database; false otherwise.

isDirty

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

Description copied from interface: Type

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

Specified by:

isDirty in interface Type

Overrides:

isDirty in class AbstractType

Parameters:

old - the old value

current - the current value

session - The session from which the request originated.

Returns:

true if the field is dirty

isDirty

public boolean isDirty(Object old,
              Object current,
              boolean[] checkable,
              SessionImplementor session)

Description copied from interface: Type

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

Parameters:

old - the old value

current - the current value

checkable - An array of booleans indicating which columns making up the value are actually checkable

session - The session from which the request originated.

Returns:

true if the field is dirty

isModified

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

Description copied from interface: Type

Has the value been modified compared to the current database state? The difference between this and the Type.isDirty(java.lang.Object, java.lang.Object, org.hibernate.engine.spi.SessionImplementor) methods is that here we need to account for "partially" built values. This is really only an issue with association types. For most type implementations it is enough to simply delegate to Type.isDirty(java.lang.Object, java.lang.Object, org.hibernate.engine.spi.SessionImplementor) here/

Specified by:

isModified in interface Type

Overrides:

isModified in class AbstractType

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 - The session from which the request originated.

Returns:

true if the field has been modified

getForeignKeyDirection

public ForeignKeyDirection getForeignKeyDirection()

Description copied from interface: AssociationType

Get the foreign key directionality of this association

hydrate

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

Description copied from interface: Type

Extract a value from the JDBC result set. This is useful for 2-phase property initialization - the second phase is a call to Type.resolve(java.lang.Object, org.hibernate.engine.spi.SessionImplementor, java.lang.Object) This hydrated value will be either:

• in the case of an entity or collection type, the key
• otherwise, the value itself

Specified by:

hydrate in interface Type

Overrides:

hydrate in class AbstractType

Parameters:

rs - The JDBC result set

names - the column names making up this type value (use to read from result set)

session - The originating session

owner - the parent entity

Returns:

An entity or collection key, or an actual value.

Throws:

HibernateException - An error from Hibernate

SQLException - An error from the JDBC driver

See Also:

Type.resolve(java.lang.Object, org.hibernate.engine.spi.SessionImplementor, java.lang.Object)

isNullable

protected boolean isNullable()

Specified by:

isNullable in class EntityType

useLHSPrimaryKey

public boolean useLHSPrimaryKey()

Description copied from interface: AssociationType

Is the primary key of the owning entity table to be used in the join?

disassemble

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

Description copied from interface: Type

Return a disassembled representation of the object. This is the value Hibernate will use in second level caching, so care should be taken to break values down to their simplest forms; for entities especially, this means breaking them down into their constituent parts.

Specified by:

disassemble in interface Type

Overrides:

disassemble in class AbstractType

Parameters:

value - the value to cache

session - the originating session

owner - optional parent entity object (needed for collections)

Returns:

the disassembled, deep cloned state

Throws:

HibernateException - An error from Hibernate

assemble

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

Description copied from interface: Type

Reconstruct the object from its disassembled state. This method is the reciprocal of Type.disassemble(java.lang.Object, org.hibernate.engine.spi.SessionImplementor, java.lang.Object)

Specified by:

assemble in interface Type

Overrides:

assemble in class AbstractType

Parameters:

oid - the disassembled state from the cache

session - the originating session

owner - the parent entity object

Returns:

the (re)assembled object

Throws:

HibernateException - An error from Hibernate

isAlwaysDirtyChecked

public boolean isAlwaysDirtyChecked()

We don't need to dirty check one-to-one because of how assemble/disassemble is implemented and because a one-to-one association is never dirty