MultiOutputStream.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License, version 2 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 *
 * Copyright 2008 Pentaho Corporation.  All rights reserved. 
 * 
 * @created Jan 26, 2008
 * @author James Dixon
 */

package org.pentaho.platform.engine.core.output;

import java.io.IOException;
import java.io.OutputStream;

/*
 * A subclass of java.io.OutputStream. Forks an output stream to multiple 
 * output streams. Takes an array of output streams on construction and copies 
 * all output sent to it to each of the streams.
 */

public class MultiOutputStream extends OutputStream {

	OutputStream outs[];
	
	public MultiOutputStream( OutputStream outs[] ) {
		this.outs = outs;
	}
	
	@Override
	public void write(int b) throws IOException {
		IOException ioEx = null;
		for( int idx=0; idx<outs.length; idx++ ) {
			try {
				outs[idx].write( b );
			} catch (IOException e) {
				ioEx = e;
			}
		}
		if( ioEx != null ) {
			throw ioEx;
		}
	}

	public void write(byte b[]) throws IOException {
		IOException ioEx = null;
		for( int idx=0; idx<outs.length; idx++ ) {
			try {
				outs[idx].write( b );
			} catch (IOException e) {
				ioEx = e;
			}
		}
		if( ioEx != null ) {
			throw ioEx;
		}
	}

	public void write(byte b[], int off, int len) throws IOException {
		IOException ioEx = null;
		for( int idx=0; idx<outs.length; idx++ ) {
			try {
				outs[idx].write( b, off, len );
			} catch (IOException e) {
				ioEx = e;
			}
		}
		if( ioEx != null ) {
			throw ioEx;
		}
	}

	public void close() throws IOException {
		IOException ioEx = null;
		for( int idx=0; idx<outs.length; idx++ ) {
			try {
				outs[idx].close( );
			} catch (IOException e) {
				ioEx = e;
			}
		}
		if( ioEx != null ) {
			throw ioEx;
		}
	}

}