Package org.springframework.jdbc.support.lob

Class AbstractLobHandler

java.lang.Object

org.springframework.jdbc.support.lob.AbstractLobHandler

All Implemented Interfaces:

LobHandler

Direct Known Subclasses:

DefaultLobHandler

public abstract class AbstractLobHandler
extends Object
implements LobHandler

Abstract base class for LobHandler implementations.

Implements all accessor methods for column names through a column lookup and delegating to the corresponding accessor that takes a column index.

Since:

1.2

Author:

Juergen Hoeller

See Also:

• ResultSet.findColumn(java.lang.String)

Constructor Summary

Constructors

Constructor	Description
AbstractLobHandler()

Method Summary

Modifier and Type	Method	Description
InputStream	getBlobAsBinaryStream(ResultSet rs, String columnName)	Retrieve the given column as binary stream from the given ResultSet.
byte[]	getBlobAsBytes(ResultSet rs, String columnName)	Retrieve the given column as bytes from the given ResultSet.
InputStream	getClobAsAsciiStream(ResultSet rs, String columnName)	Retrieve the given column as ASCII stream from the given ResultSet.
Reader	getClobAsCharacterStream(ResultSet rs, String columnName)	Retrieve the given column as character stream from the given ResultSet.
String	getClobAsString(ResultSet rs, String columnName)	Retrieve the given column as String from the given ResultSet.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.jdbc.support.lob.LobHandler

getBlobAsBinaryStream, getBlobAsBytes, getClobAsAsciiStream, getClobAsCharacterStream, getClobAsString, getLobCreator

Constructor Details

AbstractLobHandler

public AbstractLobHandler()

Method Details

getBlobAsBytes

@Nullable
public byte[] getBlobAsBytes(ResultSet rs,
 String columnName)
                      throws SQLException

Description copied from interface: LobHandler

Retrieve the given column as bytes from the given ResultSet. Might simply invoke ResultSet.getBytes or work with ResultSet.getBlob, depending on the database and driver.

Specified by:

getBlobAsBytes in interface LobHandler

Parameters:

rs - the ResultSet to retrieve the content from

columnName - the column name to use

Returns:

the content as byte array, or null in case of SQL NULL

Throws:

SQLException - if thrown by JDBC methods

See Also:

• ResultSet.getBytes(int)

getBlobAsBinaryStream

@Nullable
public InputStream getBlobAsBinaryStream(ResultSet rs,
 String columnName)
                                  throws SQLException

Description copied from interface: LobHandler

Retrieve the given column as binary stream from the given ResultSet. Might simply invoke ResultSet.getBinaryStream or work with ResultSet.getBlob, depending on the database and driver.

Specified by:

getBlobAsBinaryStream in interface LobHandler

Parameters:

rs - the ResultSet to retrieve the content from

columnName - the column name to use

Returns:

the content as binary stream, or null in case of SQL NULL

Throws:

SQLException - if thrown by JDBC methods

See Also:

• ResultSet.getBinaryStream(int)

getClobAsString

@Nullable
public String getClobAsString(ResultSet rs,
 String columnName)
                       throws SQLException

Description copied from interface: LobHandler

Retrieve the given column as String from the given ResultSet. Might simply invoke ResultSet.getString or work with ResultSet.getClob, depending on the database and driver.

Specified by:

getClobAsString in interface LobHandler

Parameters:

rs - the ResultSet to retrieve the content from

columnName - the column name to use

Returns:

the content as String, or null in case of SQL NULL

Throws:

SQLException - if thrown by JDBC methods

See Also:

• ResultSet.getString(int)

getClobAsAsciiStream

@Nullable
public InputStream getClobAsAsciiStream(ResultSet rs,
 String columnName)
                                 throws SQLException

Description copied from interface: LobHandler

Retrieve the given column as ASCII stream from the given ResultSet. Might simply invoke ResultSet.getAsciiStream or work with ResultSet.getClob, depending on the database and driver.

Specified by:

getClobAsAsciiStream in interface LobHandler

Parameters:

rs - the ResultSet to retrieve the content from

columnName - the column name to use

Returns:

the content as ASCII stream, or null in case of SQL NULL

Throws:

SQLException - if thrown by JDBC methods

See Also:

• ResultSet.getAsciiStream(int)

getClobAsCharacterStream

public Reader getClobAsCharacterStream(ResultSet rs,
 String columnName)
                                throws SQLException

Description copied from interface: LobHandler

Retrieve the given column as character stream from the given ResultSet. Might simply invoke ResultSet.getCharacterStream or work with ResultSet.getClob, depending on the database and driver.

Specified by:

getClobAsCharacterStream in interface LobHandler

Parameters:

rs - the ResultSet to retrieve the content from

columnName - the column name to use

Returns:

the content as character stream

Throws:

SQLException - if thrown by JDBC methods

See Also:

• ResultSet.getCharacterStream(int)