Class SimpleNativeJdbcExtractor
- java.lang.Object
- org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractorAdapter
- org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor
- All Implemented Interfaces:
NativeJdbcExtractor
public class SimpleNativeJdbcExtractor extends NativeJdbcExtractorAdapter
A simple implementation of theNativeJdbcExtractor
interface. Assumes a pool that wraps Connection handles but not DatabaseMetaData: In this case, the underlying native Connection can be retrieved by simply callingconHandle.getMetaData().getConnection()
. All other JDBC objects will be returned as passed in.This extractor should work with any pool that does not wrap DatabaseMetaData, and will also work with any plain JDBC driver. Note that a pool can still wrap Statements, PreparedStatements, etc: The only requirement of this extractor is that
java.sql.DatabaseMetaData
does not get wrapped, returning the native Connection of the JDBC driver onmetaData.getConnection()
.Customize this extractor by setting the "nativeConnectionNecessaryForXxx" flags accordingly: If Statements, PreparedStatements, and/or CallableStatements are wrapped by your pool, set the corresponding "nativeConnectionNecessaryForXxx" flags to "true". If none of the statement types is wrapped - or you solely need Connection unwrapping in the first place -, the defaults are fine.
SimpleNativeJdbcExtractor is a common choice for use with OracleLobHandler, which just needs Connection unwrapping via the
NativeJdbcExtractorAdapter.getNativeConnectionFromStatement(java.sql.Statement)
method. This usage will work with almost any connection pool.For full usage with JdbcTemplate, i.e. to also provide Statement unwrapping:
- Use a default SimpleNativeJdbcExtractor for Resin and SJSAS (no JDBC Statement objects are wrapped, therefore no special unwrapping is necessary).
- Use a SimpleNativeJdbcExtractor with all "nativeConnectionNecessaryForXxx" flags set to "true" for C3P0 (all JDBC Statement objects are wrapped, but none of the wrappers allow for unwrapping).
- Use a CommonsDbcpNativeJdbcExtractor for Apache Commons DBCP or a JBossNativeJdbcExtractor for JBoss (all JDBC Statement objects are wrapped, but all of them can be extracted by casting to implementation classes).
- Since:
- 05.12.2003
- Author:
- Juergen Hoeller
- See Also:
setNativeConnectionNecessaryForNativeStatements(boolean)
,setNativeConnectionNecessaryForNativePreparedStatements(boolean)
,setNativeConnectionNecessaryForNativeCallableStatements(boolean)
,Jdbc4NativeJdbcExtractor
,JdbcTemplate.setNativeJdbcExtractor(org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor)
,OracleLobHandler.setNativeJdbcExtractor(org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor)
Constructor Summary
Constructors Constructor Description SimpleNativeJdbcExtractor()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
isNativeConnectionNecessaryForNativeCallableStatements()
Returnfalse
by default.boolean
isNativeConnectionNecessaryForNativePreparedStatements()
Returnfalse
by default.boolean
isNativeConnectionNecessaryForNativeStatements()
Returnfalse
by default.void
setNativeConnectionNecessaryForNativeCallableStatements(boolean nativeConnectionNecessary)
Set whether it is necessary to work on the native Connection to receive native CallableStatements.void
setNativeConnectionNecessaryForNativePreparedStatements(boolean nativeConnectionNecessary)
Set whether it is necessary to work on the native Connection to receive native PreparedStatements.void
setNativeConnectionNecessaryForNativeStatements(boolean nativeConnectionNecessaryForNativeStatements)
Set whether it is necessary to work on the native Connection to receive native Statements.Methods inherited from class org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractorAdapter
doGetNativeConnection, getNativeCallableStatement, getNativeConnection, getNativeConnectionFromStatement, getNativePreparedStatement, getNativeResultSet, getNativeStatement
Constructor Detail
SimpleNativeJdbcExtractor
public SimpleNativeJdbcExtractor()
Method Detail
setNativeConnectionNecessaryForNativeStatements
public void setNativeConnectionNecessaryForNativeStatements(boolean nativeConnectionNecessaryForNativeStatements)
Set whether it is necessary to work on the native Connection to receive native Statements. Default is "false". If true, the Connection will be unwrapped first to create a Statement.This makes sense if you need to work with native Statements from a pool that does not allow to extract the native JDBC objects from its wrappers but returns the native Connection on DatabaseMetaData.getConnection.
The standard SimpleNativeJdbcExtractor is unable to unwrap statements, so set this to true if your connection pool wraps Statements.
isNativeConnectionNecessaryForNativeStatements
public boolean isNativeConnectionNecessaryForNativeStatements()
Description copied from class:NativeJdbcExtractorAdapter
Returnfalse
by default.- Specified by:
isNativeConnectionNecessaryForNativeStatements
in interfaceNativeJdbcExtractor
- Overrides:
isNativeConnectionNecessaryForNativeStatements
in classNativeJdbcExtractorAdapter
setNativeConnectionNecessaryForNativePreparedStatements
public void setNativeConnectionNecessaryForNativePreparedStatements(boolean nativeConnectionNecessary)
Set whether it is necessary to work on the native Connection to receive native PreparedStatements. Default is "false". If true, the Connection will be unwrapped first to create a PreparedStatement.This makes sense if you need to work with native PreparedStatements from a pool that does not allow to extract the native JDBC objects from its wrappers but returns the native Connection on Statement.getConnection.
The standard SimpleNativeJdbcExtractor is unable to unwrap statements, so set this to true if your connection pool wraps PreparedStatements.
isNativeConnectionNecessaryForNativePreparedStatements
public boolean isNativeConnectionNecessaryForNativePreparedStatements()
Description copied from class:NativeJdbcExtractorAdapter
Returnfalse
by default.- Specified by:
isNativeConnectionNecessaryForNativePreparedStatements
in interfaceNativeJdbcExtractor
- Overrides:
isNativeConnectionNecessaryForNativePreparedStatements
in classNativeJdbcExtractorAdapter
setNativeConnectionNecessaryForNativeCallableStatements
public void setNativeConnectionNecessaryForNativeCallableStatements(boolean nativeConnectionNecessary)
Set whether it is necessary to work on the native Connection to receive native CallableStatements. Default is "false". If true, the Connection will be unwrapped first to create a CallableStatement.This makes sense if you need to work with native CallableStatements from a pool that does not allow to extract the native JDBC objects from its wrappers but returns the native Connection on Statement.getConnection.
The standard SimpleNativeJdbcExtractor is unable to unwrap statements, so set this to true if your connection pool wraps CallableStatements.
isNativeConnectionNecessaryForNativeCallableStatements
public boolean isNativeConnectionNecessaryForNativeCallableStatements()
Description copied from class:NativeJdbcExtractorAdapter
Returnfalse
by default.- Specified by:
isNativeConnectionNecessaryForNativeCallableStatements
in interfaceNativeJdbcExtractor
- Overrides:
isNativeConnectionNecessaryForNativeCallableStatements
in classNativeJdbcExtractorAdapter