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ComponentType (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.type
Class ComponentType

java.lang.Object
  extended byorg.hibernate.type.AbstractType
      extended byorg.hibernate.type.ComponentType
All Implemented Interfaces:
AbstractComponentType, Serializable, Type
Direct Known Subclasses:
EmbeddedComponentType
public class ComponentType
extends AbstractType
implements AbstractComponentType

Handles "component" mappings

Author:
Gavin King
See Also:
Serialized Form

Field Summary
protected  int propertySpan
           
protected  EntityModeToTuplizerMapping tuplizerMapping
           
 
Constructor Summary
ComponentType(ComponentMetamodel metamodel)
           
 
Method Summary
 Object assemble(Serializable object, SessionImplementor session, Object owner)
          Reconstruct the object from its cached "disassembled" state.
 int compare(Object x, Object y, EntityMode entityMode)
          compare two instances of the type
 Object deepCopy(Object component, EntityMode entityMode, SessionFactoryImplementor factory)
          Return a deep copy of the persistent state, stopping at entities and at collections.
 Serializable disassemble(Object value, SessionImplementor session, Object owner)
          Return a cacheable "disassembled" representation of the object.
 Object fromXMLNode(org.dom4j.Node xml, Mapping factory)
          Parse the XML representation of an instance.
 CascadeStyle getCascadeStyle(int i)
           
 int getColumnSpan(Mapping mapping)
          How many columns are used to persist this type.
 FetchMode getFetchMode(int i)
           
 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"
 String getName()
          Returns the abbreviated name of the type.
 String[] getPropertyNames()
          Get the names of the component properties
 boolean[] getPropertyNullability()
          Optional operation
 Object getPropertyValue(Object component, int i, EntityMode entityMode)
           
 Object getPropertyValue(Object component, int i, SessionImplementor session)
           
 Object[] getPropertyValues(Object component, EntityMode entityMode)
          Optional operation
 Object[] getPropertyValues(Object component, SessionImplementor session)
          Get the values of the component properties of a component instance
 Class getReturnedClass()
          The class returned by nullSafeGet() methods.
 Type[] getSubtypes()
          Get the types of the component properties
 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.
 Object instantiate(EntityMode entityMode)
          This method does not populate the component parent
 Object instantiate(Object parent, SessionImplementor session)
           
 boolean isComponentType()
          Is this type a component type.
 boolean isDirty(Object x, Object y, boolean[] checkable, SessionImplementor session)
          Should the parent be considered dirty, given both the old and current field or element value?
 boolean isDirty(Object x, Object y, SessionImplementor session)
          Should the parent be considered dirty, given both the old and current field or element value?
 boolean isEmbedded()
           
 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 isMethodOf(Method method)
           
 boolean isModified(Object old, Object current, boolean[] checkable, SessionImplementor session)
          Has the parent object been modified, compared to the current database state?
 boolean isMutable()
          Are objects of this type mutable.
 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 nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)
          Retrieve an instance of the mapped class from a JDBC resultset.
 Object nullSafeGet(ResultSet rs, String name, SessionImplementor session, Object owner)
          Retrieve an instance of the mapped class from a JDBC resultset.
 void nullSafeSet(PreparedStatement st, Object value, int begin, boolean[] settable, SessionImplementor session)
          Write an instance of the mapped class to a prepared statement, ignoring some columns.
 void nullSafeSet(PreparedStatement st, Object value, int begin, SessionImplementor session)
          Write an instance of the mapped class to a prepared statement.
 Object replace(Object original, Object target, SessionImplementor session, Object owner, Map copyCache)
          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.
 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.
 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.
 void setPropertyValues(Object component, Object[] values, EntityMode entityMode)
          Optional operation
 void setToXMLNode(org.dom4j.Node node, Object value, SessionFactoryImplementor factory)
          A representation of the value to be embedded in an XML element.
 int[] sqlTypes(Mapping mapping)
          Return the SQL type codes 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.
 String toLoggableString(Object value, SessionFactoryImplementor factory)
          A representation of the value to be embedded in a log file.
 
Methods inherited from class org.hibernate.type.AbstractType
beforeAssemble, getSemiResolvedType, isAnyType, isAssociationType, isCollectionType, isEntityType, replaceNode
 
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
beforeAssemble, getSemiResolvedType, isAnyType, isAssociationType, isCollectionType, isEntityType
 

Field Detail

propertySpan

protected final int propertySpan

tuplizerMapping

protected final EntityModeToTuplizerMapping tuplizerMapping
Constructor Detail

ComponentType

public ComponentType(ComponentMetamodel metamodel)
Method Detail

sqlTypes

public int[] sqlTypes(Mapping mapping)
               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.

Specified by:
sqlTypes in interface Type
Returns:
the typecodes
Throws:
MappingException
See Also:
Types

getColumnSpan

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

Specified by:
getColumnSpan in interface Type
Throws:
MappingException

isComponentType

public final 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
Overrides:
isComponentType in class AbstractType

getReturnedClass

public Class getReturnedClass()
Description copied from interface: Type
The class returned by nullSafeGet() methods. This is used to establish the class of an array of this type.

Specified by:
getReturnedClass in interface Type
Returns:
Class

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
Overrides:
isSame in class AbstractType
Throws:
HibernateException

isEqual

public boolean isEqual(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.

Specified by:
isEqual in interface Type
Overrides:
isEqual in class AbstractType
Throws:
HibernateException

isEqual

public boolean isEqual(Object x,
                       Object y,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)
                throws HibernateException
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
Overrides:
isEqual in class AbstractType
Throws:
HibernateException

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
Overrides:
compare in class AbstractType

isMethodOf

public boolean isMethodOf(Method method)
Specified by:
isMethodOf in interface AbstractComponentType

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
Overrides:
getHashCode in class AbstractType

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
Overrides:
getHashCode in class AbstractType

isDirty

public boolean isDirty(Object x,
                       Object y,
                       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 AbstractType
Throws:
HibernateException

isDirty

public boolean isDirty(Object x,
                       Object y,
                       boolean[] checkable,
                       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:
x - the old value
y - the current value
checkable - which columns are actually updatable
session -
Returns:
true if the field is dirty
Throws:
HibernateException

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
Overrides:
isModified in class AbstractType
Throws:
HibernateException

nullSafeGet

public Object nullSafeGet(ResultSet rs,
                          String[] names,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException
Description copied from interface: Type
Retrieve an instance of the mapped class from a JDBC resultset. Implementors should handle possibility of null values.

Specified by:
nullSafeGet in interface Type
Parameters:
rs -
names - the column names
session -
owner - the parent entity
Returns:
Object
Throws:
SQLException
HibernateException
See Also:
alternative, 2-phase property initialization

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int begin,
                        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.

Specified by:
nullSafeSet in interface Type
Parameters:
st -
value - the object to write
begin - statement parameter index
session -
Throws:
HibernateException
SQLException

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int begin,
                        boolean[] settable,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException
Description copied from interface: Type
Write an instance of the mapped class to a prepared statement, ignoring some columns. Implementors should handle possibility of null values. A multi-column type should be written to parameters starting from index.

Specified by:
nullSafeSet in interface Type
Parameters:
st -
value - the object to write
begin - statement parameter index
settable - an array indicating which columns to ignore
session -
Throws:
SQLException
HibernateException

nullSafeGet

public Object nullSafeGet(ResultSet rs,
                          String name,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException
Description copied from interface: Type
Retrieve an instance of the mapped class from a JDBC resultset. Implementations should handle possibility of null values. This method might be called if the type is known to be a single-column type.

Specified by:
nullSafeGet in interface Type
Parameters:
rs -
name - the column name
session -
owner - the parent entity
Returns:
Object
Throws:
SQLException
HibernateException

getPropertyValue

public Object getPropertyValue(Object component,
                               int i,
                               SessionImplementor session)
                        throws HibernateException
Specified by:
getPropertyValue in interface AbstractComponentType
Throws:
HibernateException

getPropertyValue

public Object getPropertyValue(Object component,
                               int i,
                               EntityMode entityMode)
                        throws HibernateException
Throws:
HibernateException

getPropertyValues

public Object[] getPropertyValues(Object component,
                                  SessionImplementor session)
                           throws HibernateException
Description copied from interface: AbstractComponentType
Get the values of the component properties of a component instance

Specified by:
getPropertyValues in interface AbstractComponentType
Throws:
HibernateException

getPropertyValues

public Object[] getPropertyValues(Object component,
                                  EntityMode entityMode)
                           throws HibernateException
Description copied from interface: AbstractComponentType
Optional operation

Specified by:
getPropertyValues in interface AbstractComponentType
Throws:
HibernateException

setPropertyValues

public void setPropertyValues(Object component,
                              Object[] values,
                              EntityMode entityMode)
                       throws HibernateException
Description copied from interface: AbstractComponentType
Optional operation

Specified by:
setPropertyValues in interface AbstractComponentType
Throws:
HibernateException

getSubtypes

public Type[] getSubtypes()
Description copied from interface: AbstractComponentType
Get the types of the component properties

Specified by:
getSubtypes in interface AbstractComponentType

getName

public String getName()
Description copied from interface: Type
Returns the abbreviated name of the type.

Specified by:
getName in interface Type
Returns:
String the Hibernate type name

toLoggableString

public String toLoggableString(Object value,
                               SessionFactoryImplementor factory)
                        throws HibernateException
Description copied from interface: Type
A representation of the value to be embedded in a log file.

Specified by:
toLoggableString in interface Type
Parameters:
value -
factory -
Returns:
String
Throws:
HibernateException

getPropertyNames

public String[] getPropertyNames()
Description copied from interface: AbstractComponentType
Get the names of the component properties

Specified by:
getPropertyNames in interface AbstractComponentType

deepCopy

public Object deepCopy(Object component,
                       EntityMode entityMode,
                       SessionFactoryImplementor factory)
                throws HibernateException
Description copied from interface: Type
Return a deep copy of the persistent state, stopping at entities and at collections.

Specified by:
deepCopy in interface Type
Parameters:
component - generally a collection element or entity field
entityMode -
factory -
Returns:
Object a copy
Throws:
HibernateException

replace

public Object replace(Object original,
                      Object target,
                      SessionImplementor session,
                      Object owner,
                      Map copyCache)
               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

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
Overrides:
replace in class AbstractType
Throws:
HibernateException

instantiate

public Object instantiate(EntityMode entityMode)
                   throws HibernateException
This method does not populate the component parent

Throws:
HibernateException

instantiate

public Object instantiate(Object parent,
                          SessionImplementor session)
                   throws HibernateException
Throws:
HibernateException

getCascadeStyle

public CascadeStyle getCascadeStyle(int i)
Specified by:
getCascadeStyle in interface AbstractComponentType

isMutable

public boolean isMutable()
Description copied from interface: Type
Are objects of this type mutable. (With respect to the referencing object ... entities and collections are considered immutable because they manage their own internal state.)

Specified by:
isMutable in interface Type
Returns:
boolean

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
Overrides:
disassemble in class AbstractType
Throws:
HibernateException

assemble

public Object assemble(Serializable object,
                       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

getFetchMode

public FetchMode getFetchMode(int i)
Specified by:
getFetchMode in interface AbstractComponentType

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
Overrides:
hydrate in class AbstractType
Throws:
HibernateException
SQLException

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
Overrides:
resolve in class AbstractType
Throws:
HibernateException

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
Overrides:
semiResolve in class AbstractType
Throws:
HibernateException

getPropertyNullability

public boolean[] getPropertyNullability()
Description copied from interface: AbstractComponentType
Optional operation

Specified by:
getPropertyNullability in interface AbstractComponentType
Returns:
nullability of component properties

isXMLElement

public boolean isXMLElement()
Specified by:
isXMLElement in interface Type
Overrides:
isXMLElement in class AbstractType

fromXMLNode

public Object fromXMLNode(org.dom4j.Node xml,
                          Mapping factory)
                   throws HibernateException
Description copied from interface: Type
Parse the XML representation of an instance.

Specified by:
fromXMLNode in interface Type
Parameters:
xml -
factory -
Returns:
an instance of the type
Throws:
HibernateException

setToXMLNode

public void setToXMLNode(org.dom4j.Node node,
                         Object value,
                         SessionFactoryImplementor factory)
                  throws HibernateException
Description copied from interface: Type
A representation of the value to be embedded in an XML element.

Specified by:
setToXMLNode in interface Type
Parameters:
value -
factory -
Returns:
String
Throws:
HibernateException

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.

Specified by:
toColumnNullness in interface Type
Parameters:
value - an instance of the type

isEmbedded

public boolean isEmbedded()
Specified by:
isEmbedded in interface AbstractComponentType
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