001 /* 002 Copyright (C) 2003 Laurent Martelli <laurent@aopsys.com> 003 004 This program is free software; you can redistribute it and/or modify 005 it under the terms of the GNU Lesser General Public License as 006 published by the Free Software Foundation; either version 2 of the 007 License, or (at your option) any later version. 008 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU Lesser General Public License for more details. 013 014 You should have received a copy of the GNU Lesser General Public License 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ 017 018 package org.objectweb.jac.util; 019 020 import java.io.BufferedReader; 021 import java.io.InputStream; 022 import java.io.InputStreamReader; 023 import java.io.OutputStream; 024 import java.io.OutputStreamWriter; 025 import java.io.PrintWriter; 026 import java.io.Reader; 027 import java.io.Writer; 028 import org.apache.log4j.Logger; 029 030 031 /** 032 * A Pipe is a thread which reads some data from a Reader and writes 033 * it to a Writer line by line until EOF is reached in the Reader. 034 */ 035 public class Pipe extends Thread 036 { 037 static Logger logger = Logger.getLogger("util.pipe"); 038 039 /** 040 * Creates a new pipe. 041 * @param input the input of the pipe 042 * @param output the ouput of a pipe 043 */ 044 public Pipe(Reader input, Writer output) { 045 this.input = new BufferedReader(input); 046 this.output = new PrintWriter(output); 047 } 048 049 /** 050 * Creates a new pipe. 051 * @param input the input of the pipe 052 * @param output the ouput of a pipe 053 */ 054 public Pipe(InputStream input, OutputStream output) { 055 this.input = new BufferedReader(new InputStreamReader(input)); 056 this.output = new PrintWriter(new OutputStreamWriter(output)); 057 } 058 059 BufferedReader input; 060 PrintWriter output; 061 062 public void run() { 063 try { 064 String line; 065 while ((line=input.readLine())!=null) { 066 System.out.println(line); 067 // this does not work, why ? 068 //output.println(line); 069 } 070 } catch(Exception e) { 071 logger.error("Caught exception in Pipe thread: "+e); 072 } 073 } 074 }