Package 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

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.hibernate.type.EntityType

uniqueKeyPropertyName

Constructor Summary

Constructors

Constructor	Description
OneToOneType(OneToOneType original, String superTypeEntityName)
OneToOneType(TypeConfiguration typeConfiguration, String referencedEntityName, ForeignKeyDirection foreignKeyType, boolean referenceToPrimaryKey, String uniqueKeyPropertyName, boolean lazy, boolean unwrapProxy, String entityName, String propertyName, boolean constrained)

Method Summary

Modifier and Type	Method	Description
Object	assemble(Serializable oid, SharedSessionContractImplementor session, Object owner)	Reconstruct the object from its disassembled state.
Serializable	disassemble(Object value, SessionFactoryImplementor sessionFactory)	Return a disassembled representation of the object.
Serializable	disassemble(Object value, SharedSessionContractImplementor session, Object owner)	Return a disassembled representation of the object.
int	getColumnSpan(MappingContext session)	How many columns are used to persist this type?
ForeignKeyDirection	getForeignKeyDirection()	Get the foreign key directionality of this association
String	getPropertyName()
int[]	getSqlTypeCodes(MappingContext mappingContext)	Return the JDBC types codes as defined by Types or SqlTypes for the columns mapped by this type.
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, SharedSessionContractImplementor session)	Should the parent be considered dirty, given both the old and current value?
boolean	isDirty(Object old, Object current, SharedSessionContractImplementor session)	Should the parent be considered dirty, given both the old and current value?
boolean	isModified(Object old, Object current, boolean[] checkable, SharedSessionContractImplementor 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.SharedSessionContractImplementor) methods is that here we need to account for "partially" built values.
boolean	isNull(Object owner, SharedSessionContractImplementor session)
boolean	isNullable()	The nullability of the property.
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, SharedSessionContractImplementor session)	Bind a value represented by an instance of the mapped class to the given JDBC PreparedStatement, ignoring some columns as dictated by the settable parameter.
boolean[]	toColumnNullness(Object value, MappingContext mapping)	Given an instance of the type, return an array of boolean values 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, compare, deepCopy, getAssociatedEntityName, getAssociatedEntityName, getAssociatedEntityPersister, getAssociatedJoinable, getHashCode, getIdentifier, getIdentifier, getIdentifierOrUniqueKeyPropertyName, getIdentifierOrUniqueKeyPropertyName, getIdentifierOrUniqueKeyType, getIdentifierOrUniqueKeyType, getLHSPropertyName, getName, getReturnedClass, getRHSUniqueKeyPropertyName, isAssociationType, isEager, isEntityType, isEqual, isLogicalOneToOne, isMutable, isReferenceToIdentifierProperty, isReferenceToPrimaryKey, isSame, loadByUniqueKey, nullSafeSet, replace, requireIdentifierOrUniqueKeyType, resolve, resolveIdentifier, resolveIdentifier, scope, toLoggableString, toString

Methods inherited from class org.hibernate.type.AbstractType

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

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, getColumnSpan, getHashCode, getReturnedClassName, getSqlTypeCodes, getTypeForEqualsHashCode, isAnyType, isCollectionType, isComponentType, isEqual, replace, toColumnNullness

Constructor Details

OneToOneType

public OneToOneType(TypeConfiguration typeConfiguration,
 String referencedEntityName,
 ForeignKeyDirection foreignKeyType,
 boolean referenceToPrimaryKey,
 String uniqueKeyPropertyName,
 boolean lazy,
 boolean unwrapProxy,
 String entityName,
 String propertyName,
 boolean constrained)

OneToOneType

public OneToOneType(OneToOneType original,
 String superTypeEntityName)

Method Details

getPropertyName

public String getPropertyName()

Overrides:

getPropertyName in class EntityType

isNull

public boolean isNull(Object owner,
 SharedSessionContractImplementor session)

Overrides:

isNull in class EntityType

getColumnSpan

public int getColumnSpan(MappingContext session)
                  throws MappingException

Description copied from interface: Type

How many columns are used to persist this type?

Always the same as getSqlTypCodes(mappingContext).length.

Parameters:

session - The mapping Context object MappingContext

Returns:

The number of columns

Throws:

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

getSqlTypeCodes

public int[] getSqlTypeCodes(MappingContext mappingContext)

Description copied from interface: Type

Return the JDBC types codes as defined by Types or SqlTypes for the columns mapped by this type.

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

Parameters:

mappingContext - The mapping context MappingContext :/

Returns:

The JDBC type codes.

toColumnNullness

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

Description copied from interface: Type

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

Parameters:

value - an instance of the type

mapping - The mapping context MappingContext

Returns:

array indicating column nullness for a value instance

nullSafeSet

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

Description copied from interface: Type

Bind a value represented by an instance of the mapped class to the given JDBC PreparedStatement, 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.

Specified by:

nullSafeSet in interface Type

Overrides:

nullSafeSet in class EntityType

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

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,
 SharedSessionContractImplementor 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,
 SharedSessionContractImplementor 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,
 SharedSessionContractImplementor 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.SharedSessionContractImplementor) 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.SharedSessionContractImplementor).

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 checkable

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

isNullable

public boolean isNullable()

Description copied from class: EntityType

The nullability of the property.

Specified by:

isNullable in class EntityType

Returns:

The nullability of the property.

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,
 SharedSessionContractImplementor session,
 Object owner)

Description copied from interface: Type

Return a disassembled representation of the object. This is the representation that is stored in the second-level cache.

A reference to an associated entity should be disassembled to its primary key value.

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

disassemble

public Serializable disassemble(Object value,
 SessionFactoryImplementor sessionFactory)

Description copied from interface: Type

Return a disassembled representation of the object. This is the representation that is stored in the second-level cache.

A reference to an associated entity should be disassembled to its primary key value.

A high-quality implementation of this method should ensure that:

 Objects.equals(disassemble(x,s), disassemble(y,s)) == isEqual(x,y,sf)
 

and that:

 Objects.equals(x, assemble(disassemble(x,s),s,o))
 

That is, the implementation must be consistent with Type.isEqual(Object, Object, SessionFactoryImplementor) and with Type.assemble(Serializable, SharedSessionContractImplementor, Object).

Specified by:

disassemble in interface Type

Overrides:

disassemble in class AbstractType

Parameters:

value - the value to cache

sessionFactory - the session factory

Returns:

the disassembled, deep cloned state

assemble

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

Description copied from interface: Type

Reconstruct the object from its disassembled state. This function is the inverse of Type.disassemble(Object, SharedSessionContractImplementor, 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