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

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org.springframework.jdbc.support.lob
Class DefaultLobHandler

java.lang.Object
  org.springframework.jdbc.support.lob.AbstractLobHandler
      org.springframework.jdbc.support.lob.DefaultLobHandler

All Implemented Interfaces:: LobHandler

public class DefaultLobHandler
extends AbstractLobHandler
extends AbstractLobHandler

Default implementation of the LobHandler interface. Invokes the direct accessor methods that java.sql.ResultSet and java.sql.PreparedStatement offer.

This LobHandler should work for any JDBC driver that is JDBC compliant in terms of the spec's suggestions regarding simple BLOB and CLOB handling. This does not apply to Oracle 9i, and only to a limited degree to Oracle 10g! As a consequence, use OracleLobHandler for accessing Oracle BLOBs/CLOBs.

Since:: 04.12.2003
Author:: Juergen Hoeller
See Also:: setStreamAsLob(boolean), ResultSet.getBytes(int), ResultSet.getBinaryStream(int), ResultSet.getString(int), ResultSet.getAsciiStream(int), ResultSet.getCharacterStream(int), PreparedStatement.setBytes(int, byte[]), PreparedStatement.setBinaryStream(int, java.io.InputStream, int), PreparedStatement.setString(int, java.lang.String), PreparedStatement.setAsciiStream(int, java.io.InputStream, int), PreparedStatement.setCharacterStream(int, java.io.Reader, int)

Nested Class Summary

protected class DefaultLobHandler.DefaultLobCreator


Field Summary

protected Log logger


Constructor Summary

DefaultLobHandler()


Method Summary

InputStream getBlobAsBinaryStream(ResultSet rs, int columnIndex)
          Retrieve the given column as binary stream from the given ResultSet.

byte[] getBlobAsBytes(ResultSet rs, int columnIndex)
          Retrieve the given column as bytes from the given ResultSet.

InputStream getClobAsAsciiStream(ResultSet rs, int columnIndex)
          Retrieve the given column as ASCII stream from the given ResultSet.

Reader getClobAsCharacterStream(ResultSet rs, int columnIndex)
          Retrieve the given column as character stream from the given ResultSet.

String getClobAsString(ResultSet rs, int columnIndex)
          Retrieve the given column as String from the given ResultSet.

LobCreator getLobCreator()
          Create a new LobCreator instance, i.e. a session for creating BLOBs and CLOBs.

void setStreamAsLob(boolean streamAsLob)
          Specify whether a submitted binary stream / character stream should be passed to the JDBC driver as explicit LOB content, using the JDBC 4.0 setBlob / setClob method with a stream argument.

Methods inherited from class org.springframework.jdbc.support.lob.AbstractLobHandler

getBlobAsBinaryStream, getBlobAsBytes, getClobAsAsciiStream, getClobAsCharacterStream, getClobAsString

Methods inherited from class java.lang.Object

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

Nested Class Summary
`protected class`	`DefaultLobHandler.DefaultLobCreator`

Field Summary
`protected Log`	`logger`

Constructor Summary
`DefaultLobHandler()`

Method Summary
`InputStream`	`getBlobAsBinaryStream(ResultSet rs, int columnIndex)` Retrieve the given column as binary stream from the given ResultSet.
`byte[]`	`getBlobAsBytes(ResultSet rs, int columnIndex)` Retrieve the given column as bytes from the given ResultSet.
`InputStream`	`getClobAsAsciiStream(ResultSet rs, int columnIndex)` Retrieve the given column as ASCII stream from the given ResultSet.
`Reader`	`getClobAsCharacterStream(ResultSet rs, int columnIndex)` Retrieve the given column as character stream from the given ResultSet.
`String`	`getClobAsString(ResultSet rs, int columnIndex)` Retrieve the given column as String from the given ResultSet.
`LobCreator`	`getLobCreator()` Create a new LobCreator instance, i.e. a session for creating BLOBs and CLOBs.
`void`	`setStreamAsLob(boolean streamAsLob)` Specify whether a submitted binary stream / character stream should be passed to the JDBC driver as explicit LOB content, using the JDBC 4.0 `setBlob` / `setClob` method with a stream argument.

Methods inherited from class org.springframework.jdbc.support.lob.AbstractLobHandler
`getBlobAsBinaryStream, getBlobAsBytes, getClobAsAsciiStream, getClobAsCharacterStream, getClobAsString`

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

Field Detail

logger

protected final Log logger

Constructor Detail

DefaultLobHandler

public DefaultLobHandler()

Method Detail

setStreamAsLob

public void setStreamAsLob(boolean streamAsLob)

Specify whether a submitted binary stream / character stream should be passed to the JDBC driver as explicit LOB content, using the JDBC 4.0 setBlob / setClob method with a stream argument.

Default is "false", using the common JDBC 2.0 setBinaryStream / setCharacterStream method for setting the content. Switch this to "true" for explicit JDBC 4.0 usage, provided that your JDBC driver actually supports those JDBC 4.0 operations.

See Also:: PreparedStatement.setBlob(int, java.io.InputStream, long), PreparedStatement.setClob(int, java.io.Reader, long), PreparedStatement.setBinaryStream(int, java.io.InputStream, int), PreparedStatement.setCharacterStream(int, java.io.Reader, int)