org.hibernate.type
Class AbstractType

java.lang.Object
  extended by org.hibernate.type.AbstractType
All Implemented Interfaces:
Serializable, Type
Direct Known Subclasses:
AnyType, BlobType, ClobType, CollectionType, ComponentType, CompositeCustomType, CustomType, EntityType, MetaType, NullableType

public abstract class AbstractType
extends Object
implements Type

Abstract superclass of the built in Type hierarchy.

Author:
Gavin King
See Also:
Serialized Form

Constructor Summary
AbstractType()
           
 
Method Summary
 Object assemble(Serializable cached, SessionImplementor session, Object owner)
          Reconstruct the object from its cached "disassembled" state.
 void beforeAssemble(Serializable cached, 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.
 int compare(Object x, Object y, EntityMode entityMode)
          compare two instances of the type
 Serializable disassemble(Object value, SessionImplementor session, Object owner)
          Return a cacheable "disassembled" representation of the object.
 int getHashCode(Object x, EntityMode entityMode)
          Get a hashcode, consistent with persistence "equality"
 int getHashCode(Object x, EntityMode entityMode, SessionFactoryImplementor factory)
          Get a hashcode, consistent with persistence "equality"
 Type getSemiResolvedType(SessionFactoryImplementor factory)
          Get the type of a semi-resolved value.
 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 isAnyType()
          Is this an "any" type.
 boolean isAssociationType()
          Return true if the implementation is castable to AssociationType.
 boolean isCollectionType()
          Is this type a collection type.
 boolean isComponentType()
          Is this type a component type.
 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 isEqual(Object x, Object y, EntityMode entityMode)
          Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.
 boolean isEqual(Object x, Object y, EntityMode entityMode, SessionFactoryImplementor factory)
          Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.
 boolean isModified(Object old, Object current, boolean[] checkable, SessionImplementor session)
          Has the parent object been modified, compared to the current database state?
 boolean isSame(Object x, Object y, EntityMode entityMode)
          Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state - taking a shortcut for entity references.
 boolean isXMLElement()
           
 Object replace(Object original, Object target, SessionImplementor session, Object owner, Map copyCache, ForeignKeyDirection foreignKeyDirection)
          During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging.
protected static void replaceNode(org.dom4j.Node container, org.dom4j.Element value)
           
 Object resolve(Object value, SessionImplementor session, Object owner)
          Map identifiers to entities or collections.
 Object semiResolve(Object value, SessionImplementor session, Object owner)
          Given a hydrated, but unresolved value, return a value that may be used to reconstruct property-ref associations.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.hibernate.type.Type
deepCopy, fromXMLNode, getColumnSpan, getName, getReturnedClass, isDirty, isMutable, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, replace, setToXMLNode, sqlTypes, toColumnNullness, toLoggableString
 

Constructor Detail

AbstractType

public AbstractType()
Method Detail

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
Returns:
boolean
See Also:
AssociationType

isCollectionType

public boolean isCollectionType()
Description copied from interface: Type
Is this type a collection type.

Specified by:
isCollectionType in interface Type

isComponentType

public boolean isComponentType()
Description copied from interface: Type
Is this type a component type. If so, the implementation must be castable to AbstractComponentType. A component type may own collections or associations and hence must provide certain extra functionality.

Specified by:
isComponentType in interface Type
Returns:
boolean
See Also:
AbstractComponentType

isEntityType

public boolean isEntityType()
Description copied from interface: Type
Is this type an entity type?

Specified by:
isEntityType in interface Type
Returns:
boolean

isXMLElement

public boolean isXMLElement()
Specified by:
isXMLElement in interface Type

compare

public int compare(Object x,
                   Object y,
                   EntityMode entityMode)
Description copied from interface: Type
compare two instances of the type

Specified by:
compare in interface Type

disassemble

public Serializable disassemble(Object value,
                                SessionImplementor session,
                                Object owner)
                         throws HibernateException
Description copied from interface: Type
Return a cacheable "disassembled" representation of the object.

Specified by:
disassemble in interface Type
Parameters:
value - the value to cache
session - the session
owner - optional parent entity object (needed for collections)
Returns:
the disassembled, deep cloned state
Throws:
HibernateException

assemble

public Object assemble(Serializable cached,
                       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
Parameters:
cached - the disassembled state from the cache
session - the session
owner - the parent entity object
Returns:
the the object
Throws:
HibernateException

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
Parameters:
old - the old value
current - the current value
Returns:
true if the field is dirty
Throws:
HibernateException

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
names - the column names
session - the session
owner - the parent entity
Returns:
Object an identifier or actual value
Throws:
HibernateException
SQLException
See Also:
Type.resolve(Object, SessionImplementor, Object)

resolve

public Object resolve(Object value,
                      SessionImplementor session,
                      Object owner)
               throws HibernateException
Description copied from interface: Type
Map identifiers to entities or collections. This is the second phase of 2-phase property initialization.

Specified by:
resolve in interface Type
Parameters:
value - an identifier or value returned by hydrate()
session - the session
owner - the parent entity
Returns:
the given value, or the value associated with the identifier
Throws:
HibernateException
See Also:
Type.hydrate(ResultSet, String[], SessionImplementor, Object)

semiResolve

public Object semiResolve(Object value,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException
Description copied from interface: Type
Given a hydrated, but unresolved value, return a value that may be used to reconstruct property-ref associations.

Specified by:
semiResolve in interface Type
Throws:
HibernateException

isAnyType

public boolean isAnyType()
Description copied from interface: Type
Is this an "any" type. i.e. a reference to a persistent entity that is not modelled as a (foreign key) association.

Specified by:
isAnyType in interface Type

isModified

public boolean isModified(Object old,
                          Object current,
                          boolean[] checkable,
                          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
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
Returns:
true if the field has been modified
Throws:
HibernateException

isSame

public boolean isSame(Object x,
                      Object y,
                      EntityMode entityMode)
               throws HibernateException
Description copied from interface: Type
Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state - taking a shortcut for entity references.

Specified by:
isSame in interface Type
Returns:
boolean
Throws:
HibernateException

isEqual

public boolean isEqual(Object x,
                       Object y,
                       EntityMode entityMode)
Description copied from interface: Type
Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.

Specified by:
isEqual in interface Type
Returns:
boolean

getHashCode

public int getHashCode(Object x,
                       EntityMode entityMode)
Description copied from interface: Type
Get a hashcode, consistent with persistence "equality"

Specified by:
getHashCode in interface Type

isEqual

public boolean isEqual(Object x,
                       Object y,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)
Description copied from interface: Type
Compare two instances of the class mapped by this type for persistence "equality" - equality of persistent state.

Specified by:
isEqual in interface Type
Returns:
boolean

getHashCode

public int getHashCode(Object x,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)
Description copied from interface: Type
Get a hashcode, consistent with persistence "equality"

Specified by:
getHashCode in interface Type

replaceNode

protected static void replaceNode(org.dom4j.Node container,
                                  org.dom4j.Element value)

getSemiResolvedType

public Type getSemiResolvedType(SessionFactoryImplementor factory)
Description copied from interface: Type
Get the type of a semi-resolved value.

Specified by:
getSemiResolvedType in interface Type

replace

public Object replace(Object original,
                      Object target,
                      SessionImplementor session,
                      Object owner,
                      Map copyCache,
                      ForeignKeyDirection foreignKeyDirection)
               throws HibernateException
Description copied from interface: Type
During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging. For immutable objects, or null values, it is safe to simply return the first parameter. For mutable objects, it is safe to return a copy of the first parameter. For objects with component values, it might make sense to recursively replace component values.

Specified by:
replace in interface Type
Parameters:
original - the value from the detached entity being merged
target - the value in the managed entity
Returns:
the value to be merged
Throws:
HibernateException

beforeAssemble

public void beforeAssemble(Serializable cached,
                           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


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