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/*
* Java Exec Pipe Library
*
* Copyright (c) Matthew Johnson 2005
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* To Contact the author, please email src@matthew.ath.cx
*
*/
package cx.ath.matthew.io;
import java.io.FilterOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* Class to pipe an OutputStream through a command using stdin/stdout.
* E.g.
* <pre>
* Writer w = new OutputStreamWriter(new ExecOutputStream(new FileOutputStream("file"), "command"));
* </pre>
*/
public class ExecOutputStream extends FilterOutputStream
{
private Process proc;
private InputStream stdout;
private OutputStream stdin;
private InOutCopier copy;
/**
* Create a new ExecOutputStream on the given OutputStream
* using the process to filter the stream.
* @param os Writes to this OutputStream
* @param p Filters data through stdin/out on this Process
*/
public ExecOutputStream(OutputStream os, Process p) throws IOException
{
super(os);
proc = p;
stdin = p.getOutputStream();
stdout = p.getInputStream();
copy = new InOutCopier(stdout, out);
copy.start();
}
/**
* Create a new ExecOutputStream on the given OutputStream
* using the process to filter the stream.
* @param os Writes to this OutputStream
* @param cmd Creates a Process from this string to filter data through stdin/out
*/
public ExecOutputStream(OutputStream os, String cmd) throws IOException
{ this(os, Runtime.getRuntime().exec(cmd)); }
/**
* Create a new ExecOutputStream on the given OutputStream
* using the process to filter the stream.
* @param os Writes to this OutputStream
* @param cmd Creates a Process from this string array (command, arg, ...) to filter data through stdin/out
*/
public ExecOutputStream(OutputStream os, String[] cmd) throws IOException
{ this(os, Runtime.getRuntime().exec(cmd)); }
/**
* Create a new ExecOutputStream on the given OutputStream
* using the process to filter the stream.
* @param os Writes to this OutputStream
* @param cmd Creates a Process from this string to filter data through stdin/out
* @param env Setup the environment for the command
*/
public ExecOutputStream(OutputStream os, String cmd, String[] env) throws IOException
{ this(os, Runtime.getRuntime().exec(cmd, env)); }
/**
* Create a new ExecOutputStream on the given OutputStream
* using the process to filter the stream.
* @param os Writes to this OutputStream
* @param cmd Creates a Process from this string array (command, arg, ...) to filter data through stdin/out
* @param env Setup the environment for the command
*/
public ExecOutputStream(OutputStream os, String[] cmd, String[] env) throws IOException
{ this(os, Runtime.getRuntime().exec(cmd, env)); }
public void close() throws IOException
{
stdin.close();
try {
proc.waitFor();
} catch (InterruptedException Ie) {}
//copy.close();
try {
copy.join();
} catch (InterruptedException Ie) {}
stdout.close();
out.close();
}
public void flush() throws IOException
{
stdin.flush();
copy.flush();
out.flush();
}
public void write(byte[] b) throws IOException
{
stdin.write(b);
}
public void write(byte[] b, int off, int len) throws IOException
{
stdin.write(b, off, len);
}
public void write(int b) throws IOException
{
stdin.write(b);
}
public void finalize()
{
try {
close();
} catch (Exception e) {}
}
}
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