MultiTeeOutputStream.java

/*****************************************************************************
 * Copyright (c) 2006-2013, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 *****************************************************************************/
package org.eclipse.buckminster.runtime;

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

/**
 * @author Thomas Hallgren
 */
public class MultiTeeOutputStream extends OutputStream {
	private final OutputStream[] streams;

	public MultiTeeOutputStream(OutputStream[] streams) {
		this.streams = streams;
	}

	@Override
	public void close() throws IOException {
		// We do make sure that all streams are closed even if
		// exceptions are thrown. We also make sure that at least
		// one of any number of thrown exceptions is thrown. There
		// might be a loss of exceptions if several streams
		// throw an exception.
		//
		IOException closeException = null;
		int idx = streams.length;
		while (--idx >= 0) {
			try {
				streams[idx].close();
			} catch (IOException ioe) {
				if (closeException == null)
					closeException = ioe;
			}
		}
		if (closeException != null)
			throw closeException;
	}

	@Override
	public void flush() throws IOException {
		int idx = streams.length;
		while (--idx >= 0)
			streams[idx].flush();
	}

	@Override
	public void write(byte[] b) throws IOException {
		int idx = streams.length;
		while (--idx >= 0)
			streams[idx].write(b);
	}

	@Override
	public void write(byte[] b, int off, int len) throws IOException {
		int idx = streams.length;
		while (--idx >= 0)
			streams[idx].write(b, off, len);
	}

	@Override
	public void write(int b) throws IOException {
		int idx = streams.length;
		while (--idx >= 0)
			streams[idx].write(b);
	}
}