001    /*
002     * Copyright (C) 2003-2009 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software 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 GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.util;
020    
021    import java.io.ByteArrayOutputStream;
022    import java.io.IOException;
023    import java.io.InputStream;
024    
025    /**
026     * Extends the {@link java.io.ByteArrayOutputStream} for providing an input stream over the
027     * buffer.
028     *
029     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
030     * @version $Revision$
031     */
032    public class BytesOutputStream extends ByteArrayOutputStream {
033    
034      /** . */
035      private boolean closed;
036    
037      public BytesOutputStream() {
038      }
039    
040      public BytesOutputStream(int size) {
041        super(size);
042      }
043    
044      public InputStream getInputStream() {
045        if (!closed) {
046          throw new IllegalStateException("Not yet closed");
047        }
048        return new InputStream() {
049    
050          /** . */
051          int read = 0;
052    
053          @Override
054          public int read() throws IOException {
055            if (read < count) {
056              return buf[read++];
057            } else {
058              return -1;
059            }
060          }
061        };
062      }
063    
064      @Override
065      public void close() throws IOException {
066        super.close();
067    
068        //
069        closed = true;
070      }
071    }