org.springframework.orm.hibernate3.support

Class BlobSerializableType

java.lang.Object

org.springframework.orm.hibernate3.support.AbstractLobType

org.springframework.orm.hibernate3.support.BlobSerializableType

All Implemented Interfaces:

UserType

public class BlobSerializableType
extends AbstractLobType

Hibernate UserType implementation for arbitrary objects that get serialized to BLOBs. Retrieves the LobHandler to use from LocalSessionFactoryBean at config time.

Can also be defined in generic Hibernate mappings, as DefaultLobCreator will work with most JDBC-compliant database drivers. In this case, the field type does not have to be BLOB: For databases like MySQL and MS SQL Server, any large enough binary type will work.

Since:

1.2

Author:

Juergen Hoeller

See Also:

LocalSessionFactoryBean.setLobHandler(org.springframework.jdbc.support.lob.LobHandler)

Field Summary

Fields inherited from class org.springframework.orm.hibernate3.support.AbstractLobType

logger

Constructor Summary

Constructors

Modifier	Constructor and Description
	BlobSerializableType() Constructor used by Hibernate: fetches config-time LobHandler and config-time JTA TransactionManager from LocalSessionFactoryBean.
protected	BlobSerializableType(LobHandler lobHandler, TransactionManager jtaTransactionManager) Constructor used for testing: takes an explicit LobHandler and an explicit JTA TransactionManager (can be null).

Method Summary

Modifier and Type	Method and Description
Object	deepCopy(Object value) This implementation returns the passed-in value as-is.
boolean	isMutable() This implementation returns false.
protected Object	nullSafeGetInternal(ResultSet rs, String[] names, Object owner, LobHandler lobHandler) Template method to extract a value from the given result set.
protected void	nullSafeSetInternal(PreparedStatement ps, int index, Object value, LobCreator lobCreator) Template method to set the given parameter value on the given statement.
Class<?>	returnedClass()
int[]	sqlTypes()

Methods inherited from class org.springframework.orm.hibernate3.support.AbstractLobType

assemble, disassemble, equals, hashCode, nullSafeGet, nullSafeSet, replace

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.usertype.UserType

nullSafeGet, nullSafeSet

Constructor Detail

BlobSerializableType

public BlobSerializableType()

Constructor used by Hibernate: fetches config-time LobHandler and config-time JTA TransactionManager from LocalSessionFactoryBean.

See Also:

LocalSessionFactoryBean.getConfigTimeLobHandler(), LocalSessionFactoryBean.getConfigTimeTransactionManager()

BlobSerializableType

protected BlobSerializableType(LobHandler lobHandler,
                               TransactionManager jtaTransactionManager)

Constructor used for testing: takes an explicit LobHandler and an explicit JTA TransactionManager (can be null).

Method Detail

sqlTypes

public int[] sqlTypes()

returnedClass

public Class<?> returnedClass()

isMutable

public boolean isMutable()

Description copied from class: AbstractLobType

This implementation returns false.

Specified by:

isMutable in interface UserType

Overrides:

isMutable in class AbstractLobType

deepCopy

public Object deepCopy(Object value)
                throws HibernateException

Description copied from class: AbstractLobType

This implementation returns the passed-in value as-is.

Specified by:

deepCopy in interface UserType

Overrides:

deepCopy in class AbstractLobType

Throws:

HibernateException

nullSafeGetInternal

protected Object nullSafeGetInternal(ResultSet rs,
                                     String[] names,
                                     Object owner,
                                     LobHandler lobHandler)
                              throws SQLException,
                                     IOException,
                                     HibernateException

Description copied from class: AbstractLobType

Template method to extract a value from the given result set.

Specified by:

nullSafeGetInternal in class AbstractLobType

Parameters:

rs - the ResultSet to extract from

names - the column names

owner - the containing entity

lobHandler - the LobHandler to use

Returns:

the extracted value

Throws:

SQLException - if thrown by JDBC methods

IOException - if thrown by streaming methods

HibernateException - in case of any other exceptions

nullSafeSetInternal

protected void nullSafeSetInternal(PreparedStatement ps,
                                   int index,
                                   Object value,
                                   LobCreator lobCreator)
                            throws SQLException,
                                   IOException

Description copied from class: AbstractLobType

Template method to set the given parameter value on the given statement.

Specified by:

nullSafeSetInternal in class AbstractLobType

Parameters:

ps - the PreparedStatement to set on

index - the statement parameter index

value - the value to set

lobCreator - the LobCreator to use

Throws:

SQLException - if thrown by JDBC methods

IOException - if thrown by streaming methods