org.tigris.subversion.javahl.SVNInputStream Maven / Gradle / Ivy
/**
* @copyright
* ====================================================================
* Copyright (c) 2003 CollabNet. All rights reserved.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://subversion.tigris.org/license-1.html.
* If newer versions of this license are posted there, you may use a
* newer version instead, at your option.
*
* This software consists of voluntary contributions made by many
* individuals. For exact contribution history, see the revision
* history and logs, available at http://subversion.tigris.org/.
* ====================================================================
* @endcopyright
*/
package org.tigris.subversion.javahl;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
/**
* This class connects a java.io.PipedInputStream to a OutputInterface.
* The other side of the Pipe must read by another thread, or deadlocks
* will occur.
*/
public class SVNInputStream extends PipedInputStream
{
/**
* my connection to put data into subversion
*/
Outputer myOutputer;
/**
* Creates a SVNInputStream so that it is connected with an internal
* PipedOutputStream
* @throws IOException
*/
public SVNInputStream() throws IOException
{
myOutputer = new Outputer(this);
}
/**
* Get the Interface to connect to SVNAdmin
* @return the connection interface
*/
public OutputInterface getOutputer()
{
return myOutputer;
}
/**
* Closes this input stream and releases any system resources associated
* with the stream.
*
* The close method of InputStream does
* nothing.
*
* @throws IOException if an I/O error occurs.
*/
public void close() throws IOException
{
myOutputer.closed = true;
super.close();
}
/**
* this class implements the connection to SVNAdmin
*/
public class Outputer implements OutputInterface
{
/**
* my side of the pipe
*/
PipedOutputStream myStream;
/**
* flag that the other side of the pipe has been closed
*/
boolean closed;
/**
* build a new connection object
* @param myMaster the other side of the pipe
* @throws IOException
*/
Outputer(SVNInputStream myMaster) throws IOException
{
myStream =new PipedOutputStream(myMaster);
}
/**
* write the bytes in data to java
* @param data the data to be written
* @throws IOException throw in case of problems.
*/
public int write(byte[] data) throws IOException
{
if (closed)
throw new IOException("stream has been closed");
myStream.write(data);
return data.length;
}
/**
* close the output
* @throws IOException throw in case of problems.
*/
public void close() throws IOException
{
myStream.close();
}
}
}