org.hibernate.type
Class ManyToOneType

java.lang.Object
  extended by org.hibernate.type.AbstractType
      extended by org.hibernate.type.EntityType
          extended by org.hibernate.type.ManyToOneType
All Implemented Interfaces:
Serializable, AssociationType, Type

public class ManyToOneType
extends EntityType

A many-to-one association to an entity.

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
ManyToOneType(TypeFactory.TypeScope scope, String referencedEntityName)
          Creates a many-to-one association type with the given referenced entity.
ManyToOneType(TypeFactory.TypeScope scope, String referencedEntityName, boolean lazy)
          Creates a many-to-one association type with the given referenced entity and the given laziness characteristic
ManyToOneType(TypeFactory.TypeScope scope, String referencedEntityName, String uniqueKeyPropertyName, boolean lazy, boolean unwrapProxy, boolean isEmbeddedInXML, boolean ignoreNotFound, boolean isLogicalOneToOne)
           
 
Method Summary
 Object assemble(Serializable oid, SessionImplementor session, Object owner)
          Reconstruct the object from its disassembled state.
 void beforeAssemble(Serializable oid, SessionImplementor session)
          Called before assembling a query result set from the query cache, to allow batch fetching of entities missing from the second-level cache.
 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 mapping)
          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)
          Extract a value from the JDBC result set.
 boolean isAlwaysDirtyChecked()
          Do we dirty check this association, even when there are no columns to be updated?
 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 isLogicalOneToOne()
          Is the association modeled here a 1-1 according to the logical moidel?
 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.
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 mapping)
          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, getPropertyName, getReturnedClass, getRHSUniqueKeyPropertyName, getSemiResolvedType, isAssociationType, isEmbeddedInXML, isEntityType, isEqual, isMutable, isNotEmbedded, isNull, isReferenceToPrimaryKey, isSame, isXMLElement, loadByUniqueKey, nullSafeGet, nullSafeGet, replace, resolve, resolveIdentifier, scope, setToXMLNode, toLoggableString, toString
 
Methods inherited from class org.hibernate.type.AbstractType
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
getHashCode, isAnyType, isCollectionType, isComponentType, isEqual, replace, semiResolve
 

Constructor Detail

ManyToOneType

public ManyToOneType(TypeFactory.TypeScope scope,
                     String referencedEntityName)
Creates a many-to-one association type with the given referenced entity.

Parameters:
scope - The scope for this instance.
referencedEntityName - The name iof the referenced entity

ManyToOneType

public ManyToOneType(TypeFactory.TypeScope scope,
                     String referencedEntityName,
                     boolean lazy)
Creates a many-to-one association type with the given referenced entity and the given laziness characteristic

Parameters:
scope - The scope for this instance.
referencedEntityName - The name iof the referenced entity
lazy - Should the association be handled lazily

ManyToOneType

public ManyToOneType(TypeFactory.TypeScope scope,
                     String referencedEntityName,
                     String uniqueKeyPropertyName,
                     boolean lazy,
                     boolean unwrapProxy,
                     boolean isEmbeddedInXML,
                     boolean ignoreNotFound,
                     boolean isLogicalOneToOne)
Method Detail

isNullable

protected boolean isNullable()
Specified by:
isNullable in class EntityType

isAlwaysDirtyChecked

public boolean isAlwaysDirtyChecked()
Description copied from interface: AssociationType
Do we dirty check this association, even when there are no columns to be updated?


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.

isLogicalOneToOne

public boolean isLogicalOneToOne()
Description copied from class: EntityType
Is the association modeled here a 1-1 according to the logical moidel?

Overrides:
isLogicalOneToOne in class EntityType
Returns:
True if a 1-1 in the logical model; false otherwise.

getColumnSpan

public int getColumnSpan(Mapping mapping)
                  throws MappingException
Description copied from interface: Type
How many columns are used to persist this type. Always the same as sqlTypes(mapping).length

Parameters:
mapping - The mapping object :/
Returns:
The number of columns
Throws:
MappingException - Generally indicates an issue accessing the passed mapping object.

sqlTypes

public int[] sqlTypes(Mapping mapping)
               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:
mapping - 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.

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int index,
                        boolean[] settable,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException
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
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int index,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException
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
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver

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:

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)

useLHSPrimaryKey

public boolean useLHSPrimaryKey()
Description copied from interface: AssociationType
Is the primary key of the owning entity table to be used in the join?


isModified

public boolean isModified(Object old,
                          Object current,
                          boolean[] checkable,
                          SessionImplementor session)
                   throws HibernateException
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
Throws:
HibernateException - A problem occurred performing the checking

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

beforeAssemble

public void beforeAssemble(Serializable oid,
                           SessionImplementor session)
Description copied from interface: Type
Called before assembling a query result set from the query cache, to allow batch fetching of entities missing from the second-level cache.

Specified by:
beforeAssemble in interface Type
Overrides:
beforeAssemble in class AbstractType
Parameters:
oid - The key
session - The originating session

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

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 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
Throws:
HibernateException - A problem occurred performing the checking

isDirty

public boolean isDirty(Object old,
                       Object current,
                       boolean[] checkable,
                       SessionImplementor session)
                throws HibernateException
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
Throws:
HibernateException - A problem occurred performing the checking


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