org.apache.derby.impl.jdbc

Class ClobUtf8Writer

java.lang.Object

java.io.Writer

org.apache.derby.impl.jdbc.ClobUtf8Writer

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable

final class ClobUtf8Writer
extends java.io.Writer

Writer implementation for Clob.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	closed
private TemporaryClob	control
private long	pos

Fields inherited from class java.io.Writer

lock

Constructor Summary

Constructors

Constructor and Description
ClobUtf8Writer(TemporaryClob control, long pos) Constructor.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the stream.
void	flush() Flushes the stream.
void	write(char[] cbuf, int off, int len) Writes a portion of an array of characters to the CLOB value.

Methods inherited from class java.io.Writer

append, append, append, write, write, write, write

Methods inherited from class java.lang.Object

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

Field Detail

control

private TemporaryClob control

pos

private long pos

closed

private boolean closed

Constructor Detail

ClobUtf8Writer

ClobUtf8Writer(TemporaryClob control,
               long pos)

Constructor.

Parameters:

control - worker object for the CLOB value

pos - initial byte position in the CLOB value

Method Detail

flush

public void flush()
           throws java.io.IOException

Flushes the stream.

Flushing the stream after close() has been called will cause an exception to be thrown.

Implementation note: In the current implementation, this is a no-op. Flushing is left to the underlying stream(s). Note that when programming against/with this class, always follow good practice and call flush.

Specified by:

flush in interface java.io.Flushable

Specified by:

flush in class java.io.Writer

Throws:

java.io.IOException - if the stream has been closed

close

public void close()

Closes the stream.

Once the stream has been closed, further write or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class java.io.Writer

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws java.io.IOException

Writes a portion of an array of characters to the CLOB value.

Specified by:

write in class java.io.Writer

Parameters:

cbuf - array of characters

off - offset into cbuf from which to start writing characters

len - number of characters to write

Throws:

java.io.IOException - if an I/O error occurs