当前页面: 在线文档首页 > Hibernate 2.1.8 正式版 API 英文文档

ComponentType (Hibernate API Documentation) - Hibernate 2.1.8 正式版 API 英文文档

Overview  Package   Class  Use  Tree  Deprecated  Index  Help
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

net.sf.hibernate.type
Class ComponentType

java.lang.Object
  net.sf.hibernate.type.AbstractType
      net.sf.hibernate.type.ComponentType

All Implemented Interfaces:

AbstractComponentType, Serializable, Type

---

public class ComponentType

extends AbstractType

implements AbstractComponentType

Handles "component" mappings

Author:

Gavin King

See Also:

Serialized Form

---

Constructor Summary

ComponentType(Class componentClass, String[] propertyNames, Getter[] propertyGetters, Setter[] propertySetters, boolean foundCustomAccessor, Type[] propertyTypes, int[] joinedFetch, Cascades.CascadeStyle[] cascade, String parentProperty)

 

Method Summary
Object	assemble(Serializable object, SessionImplementor session, Object owner)           Reconstruct the object from its cached "disassembled" state.
Cascades.CascadeStyle	cascade(int i)
Object	copy(Object original, Object target, SessionImplementor session, Object owner, Map copiedAlready)
Object	deepCopy(Object component)           Return a deep copy of the persistent state, stopping at entities and at collections.
Serializable	disassemble(Object value, SessionImplementor session)           Return a cacheable "disassembled" representation of the object.
int	enableJoinedFetch(int i)
boolean	equals(Object object)
boolean	equals(Object x, Object y)           Compare two instances of the class mapped by this type for persistence "equality", ie.
Object	fromString(String xml)           Parse the XML representation of an instance.
int	getColumnSpan(Mapping mapping)           How many columns are used to persist this type.
String	getName()           Returns the abbreviated name of the type.
String[]	getPropertyNames()
Object	getPropertyValue(Object component, int i)
Object	getPropertyValue(Object component, int i, SessionImplementor session)
Object[]	getPropertyValues(Object component)           Optional operation
Object[]	getPropertyValues(Object component, SessionImplementor session)
Class	getReturnedClass()           The class returned by nullSafeGet() methods.
Type[]	getSubtypes()
int	hashCode()
boolean	hasNiceEquals()           Does this type implement a well-behaved equals() method.
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(Object parent, SessionImplementor session)
boolean	isComponentType()           Is this type a component type.
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	isModified(Object old, Object current, SessionImplementor session)           Has the parent object been modified, compared to the current database state?
boolean	isMutable()           Are objects of this type mutable.
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, SessionImplementor session)           Write an instance of the mapped class to a prepared statement.
Object	resolveIdentifier(Object value, SessionImplementor session, Object owner)           Map identifiers to entities or collections.
void	setPropertyValues(Object component, Object[] values)           Optional operation
int[]	sqlTypes(Mapping mapping)           Return the SQL type codes for the columns mapped by this type.
String	toString(Object value, SessionFactoryImplementor factory)           A representation of the value to be embedded in an XML element.

 

Methods inherited from class net.sf.hibernate.type.AbstractType

isAssociationType, isEntityType, isObjectType, isPersistentCollectionType

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface net.sf.hibernate.type.Type

isAssociationType, isEntityType, isObjectType, isPersistentCollectionType

 

Constructor Detail

ComponentType

public ComponentType(Class componentClass,
                     String[] propertyNames,
                     Getter[] propertyGetters,
                     Setter[] propertySetters,
                     boolean foundCustomAccessor,
                     Type[] propertyTypes,
                     int[] joinedFetch,
                     Cascades.CascadeStyle[] cascade,
                     String parentProperty)
              throws MappingException

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

---

equals

public boolean equals(Object x,
                      Object y)
               throws HibernateException

Description copied from interface: Type

Compare two instances of the class mapped by this type for persistence "equality", ie. Equality of persistent state.

Specified by:

equals in interface Type

Parameters:

x -

y -

Returns:

boolean

Throws:

HibernateException

---

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

---

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:

HibernateException

SQLException

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:

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)
                        throws HibernateException

Throws:

HibernateException

---

getPropertyValues

public Object[] getPropertyValues(Object component,
                                  SessionImplementor session)
                           throws HibernateException

Specified by:

getPropertyValues in interface AbstractComponentType

Throws:

HibernateException

---

getPropertyValues

public Object[] getPropertyValues(Object component)
                           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)
                       throws HibernateException

Description copied from interface: AbstractComponentType

Optional operation

Specified by:

setPropertyValues in interface AbstractComponentType

Throws:

HibernateException

---

getSubtypes

public Type[] getSubtypes()

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

---

toString

public String toString(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:

toString in interface Type

Parameters:

value -

factory -

Returns:

String

Throws:

HibernateException

---

fromString

public Object fromString(String xml)
                  throws HibernateException

Description copied from interface: Type

Parse the XML representation of an instance.

Specified by:

fromString in interface Type

Parameters:

xml -

Returns:

an instance of the type

Throws:

HibernateException

---

getPropertyNames

public String[] getPropertyNames()

Specified by:

getPropertyNames in interface AbstractComponentType

---

deepCopy

public Object deepCopy(Object component)
                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

Returns:

Object a copy

Throws:

HibernateException

---

copy

public Object copy(Object original,
                   Object target,
                   SessionImplementor session,
                   Object owner,
                   Map copiedAlready)
            throws HibernateException

Specified by:

copy in interface Type

Overrides:

copy in class AbstractType

Throws:

HibernateException

---

instantiate

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

Throws:

HibernateException

---

cascade

public Cascades.CascadeStyle cascade(int i)

Specified by:

cascade 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)
                         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

---

hasNiceEquals

public boolean hasNiceEquals()

Description copied from interface: Type

Does this type implement a well-behaved equals() method. (ie. one that is consistent with Type.equals().) Strictly, if this method returns true then x.equals(y) implies Type.equals(x, y) and also Type.equals(x, y) implies that probably x.equals(y)

Specified by:

hasNiceEquals in interface Type

See Also:

Object.equals(java.lang.Object), Type.equals(java.lang.Object, java.lang.Object)

---

enableJoinedFetch

public int enableJoinedFetch(int i)

Specified by:

enableJoinedFetch 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

---

resolveIdentifier

public Object resolveIdentifier(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:

resolveIdentifier in interface Type

Overrides:

resolveIdentifier in class AbstractType

Throws:

HibernateException

---

isModified

public boolean isModified(Object old,
                          Object current,
                          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

---

equals

public boolean equals(Object object)

Overrides:

equals in class AbstractType

---

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractType

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---