org.apache.derby.client.am
Class ClobLocatorOutputStream

java.lang.Object
  java.io.OutputStream
      org.apache.derby.client.am.ClobLocatorOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class ClobLocatorOutputStream
extends java.io.OutputStream

An OutputStream that will use an locator to write bytes to the Clob value on the server.

Closing a ByteArrayInputStream has no effect. The methods in this class can be called after the stream has been closed without generating an IOException.

This OutputStream implementation is pretty basic. No buffering of data is done. Hence, for efficieny #write(byte[]) should be used instead of #write(int).

Field Summary

private Clob	clob The Clob to be accessed.
private Connection	connection Connection used to read Clob from server.
private long	currentPos Current position in the underlying Clob.

Constructor Summary

ClobLocatorOutputStream(Connection connection, Clob clob, long pos)
Create an OutputStream for writing to the Clob value represented by the given locator based Clob object.

Method Summary

void	flush()
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)
private void	writeBytes(byte[] b) Write the byte[] to the Clob value on the server; starting from the current position of this stream.

Methods inherited from class java.io.OutputStream

close

Methods inherited from class java.lang.Object

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

Field Detail

connection

private final Connection connection

Connection used to read Clob from server.

clob

private final Clob clob

The Clob to be accessed.

currentPos

private long currentPos

Current position in the underlying Clob. Clobs are indexed from 1

Constructor Detail

ClobLocatorOutputStream

public ClobLocatorOutputStream(Connection connection,
                               Clob clob,
                               long pos)
                        throws SqlException

Create an OutputStream for writing to the Clob value represented by the given locator based Clob object.

Parameters:

connection - connection to be used to write to the Clob value on the server

clob - Clob object that contains locator for the Clob value on the server.

pos - the position in the CLOB value at which to start writing; the first position is 1

Throws:

SqlException

Method Detail

write

public void write(int b)
           throws java.io.IOException

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

This method writes one byte at a time to the server. For more efficient writing, use #write(byte[]).

write

public void write(byte[] b)
           throws java.io.IOException

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.write(byte[])

write

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

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.write(byte[], int, int)

flush

public void flush()

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

See Also:

OutputStream.flush()

writeBytes

private void writeBytes(byte[] b)
                 throws java.io.IOException

Write the byte[] to the Clob value on the server; starting from the current position of this stream.

Parameters:

b - The byte array containing the bytes to be written

Throws:

java.io.IOException - Wrapped SqlException if writing to server fails.