org.apache.derby.client.am
Class ClobLocatorOutputStream

java.lang.Object
  extended by java.io.OutputStream
      extended by 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.

Built on Thu 2010-12-23 20:49:13+0000, from revision ???

Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.