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ClobStringType (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.orm.hibernate.support
Class ClobStringType

java.lang.Object
  org.springframework.orm.hibernate.support.AbstractLobType
      org.springframework.orm.hibernate.support.ClobStringType

All Implemented Interfaces:

net.sf.hibernate.UserType

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public class ClobStringType
extends AbstractLobType

Hibernate UserType implementation for Strings that get mapped to CLOBs. Retrieves the LobHandler to use from LocalSessionFactoryBean at config time.

Particularly useful for storing Strings with more than 4000 characters in an Oracle database (only possible via CLOBs), in combination with OracleLobHandler.

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 CLOB: For databases like MySQL and MS SQL Server, any large enough character type will work.

Since:

12.01.2004

Author:

Juergen Hoeller

See Also:

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

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Field Summary

 

Fields inherited from class org.springframework.orm.hibernate.support.AbstractLobType
LOB_CREATOR_SYNCHRONIZATION_ORDER, logger

 

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

 

Method Summary
protected  Object	nullSafeGetInternal(ResultSet rs, int index, 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.hibernate.support.AbstractLobType
deepCopy, equals, isMutable, nullSafeGet, nullSafeSet

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

ClobStringType

public ClobStringType()

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

See Also:

LocalSessionFactoryBean.getConfigTimeLobHandler(), LocalSessionFactoryBean.getConfigTimeTransactionManager()

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ClobStringType

protected ClobStringType(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()

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returnedClass

public Class returnedClass()

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nullSafeGetInternal

protected Object nullSafeGetInternal(ResultSet rs,
                                     int index,
                                     LobHandler lobHandler)
                              throws SQLException

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

index - the index in the ResultSet

lobHandler - the LobHandler to use

Returns:

the extracted value

Throws:

SQLException - if thrown by JDBC methods

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nullSafeSetInternal

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

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

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