org.hibernate.type
Class BlobType

java.lang.Object
  extended byorg.hibernate.type.AbstractType
      extended byorg.hibernate.type.BlobType
All Implemented Interfaces:
Serializable, Type

public class BlobType
extends AbstractType

blob: A type that maps an SQL BLOB to a java.sql.Blob.

Author:
Gavin King
See Also:
Serialized Form

Constructor Summary
BlobType()
           
 
Method Summary
 int compare(Object x, Object y, EntityMode entityMode)
          compare two instances of the type
 Object deepCopy(Object value, 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.
 Object get(ResultSet rs, String name)
           
 int getColumnSpan(Mapping mapping)
          How many columns are used to persist this type.
 int getHashCode(Object x, EntityMode entityMode)
          Get a hashcode, consistent with persistence "equality"
 String getName()
          Returns the abbreviated name of the type.
 Class getReturnedClass()
          The class returned by nullSafeGet() methods.
 boolean isDirty(Object old, Object current, boolean[] checkable, SessionImplementor session)
          Should the parent be considered dirty, given both the old and current field or element value?
 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 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 index, 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 index, 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.
 void set(PreparedStatement st, Object value, int index, SessionImplementor session)
           
 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
assemble, beforeAssemble, getHashCode, getSemiResolvedType, hydrate, isAnyType, isAssociationType, isCollectionType, isComponentType, isDirty, isEntityType, isEqual, isModified, isSame, isXMLElement, replace, replaceNode, resolve, semiResolve
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BlobType

public BlobType()
Method Detail

set

public void set(PreparedStatement st,
                Object value,
                int index,
                SessionImplementor session)
         throws HibernateException,
                SQLException
Throws:
HibernateException
SQLException

get

public Object get(ResultSet rs,
                  String name)
           throws HibernateException,
                  SQLException
Throws:
HibernateException
SQLException

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.

Returns:
Class

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
Overrides:
isEqual in class AbstractType

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

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

getName

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

Returns:
String the Hibernate type name

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

deepCopy

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

Parameters:
value - generally a collection element or entity field
entityMode -
factory -
Returns:
Object a copy

fromXMLNode

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

Parameters:
xml -
factory -
Returns:
an instance of the type

getColumnSpan

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


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.)

Returns:
boolean

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.

Parameters:
rs -
name - the column name
session -
owner - the parent entity
Returns:
Object
Throws:
SQLException
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.

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 index,
                        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.

Parameters:
st -
value - the object to write
index - statement parameter index
settable - an array indicating which columns to ignore
session -
Throws:
HibernateException
SQLException

nullSafeSet

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

Parameters:
st -
value - the object to write
index - statement parameter index
session -
Throws:
HibernateException
SQLException

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.

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

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.

Returns:
the typecodes
Throws:
MappingException
See Also:
Types

setToXMLNode

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

Parameters:
value -
factory -
Returns:
String

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.

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.

Parameters:
value - an instance of the type

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 field or element value?

Parameters:
old - the old value
current - the current value
checkable - which columns are actually updatable
session -
Returns:
true if the field is dirty
Throws:
HibernateException