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package fileIO;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Listens to an output stream and copies it to an input stream.
* For example, redirects the error stream of some process to stderr.
* @author Brian Bushnell
* @date Jan 22, 2013
*
*/
public class PipeThread extends Thread {
// public PipeThread(InputStream is_){this(is_, System.err);}
public PipeThread(InputStream is_, OutputStream os_){
is=is_;
os=os_;
if(is==null){throw new RuntimeException("Null input stream.");}
if(os==null){throw new RuntimeException("Null output stream.");}
// synchronized(list){list.add(this);}
}
@Override
public void run(){
final byte[] buf=new byte[8196];
try {
for(int len=is.read(buf); !finished && len>0; len=is.read(buf)){
os.write(buf, 0, len);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(is!=System.in){
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(os!=System.out && os!=System.err){
ReadWrite.close(os);
}
synchronized(this){
finished=true;
this.notify();
}
}
public boolean finished(){
synchronized(this){
return finished;
}
}
public void terminate(){
synchronized(this){
if(!finished){
finished=true;
interrupt();
}
}
}
// public static void killList(){
// System.err.println("Kill list.");
// synchronized(list){
// for(PipeThread pt : list){
// if(!pt.finished){
// pt.terminate();
// }
// }
// }
// }
public final InputStream is;
public final OutputStream os;
private volatile boolean finished=false;
// private static ArrayList<PipeThread> list=new ArrayList<PipeThread>(8);
}
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