001    /*
002     * Copyright (C) 2012 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    
020    package org.crsh.command;
021    
022    import org.crsh.Pipe;
023    
024    import java.io.IOException;
025    
026    class PipeCommandProxy<E> extends PipeCommand<E> {
027    
028      /** . */
029      private final PipeCommand<E> delegate;
030    
031      /** . */
032      private final Pipe<E> next;
033    
034      PipeCommandProxy(PipeCommand<E> delegate, Pipe<E> next) {
035        this.delegate = delegate;
036        this.next = next;
037      }
038    
039      @Override
040      public void open() throws ScriptException {
041        if (next != null && next instanceof PipeCommand) {
042          ((PipeCommand)next).open();
043        }
044        delegate.setPiped(isPiped());
045        delegate.open();
046      }
047    
048      @Override
049      public void provide(E element) throws ScriptException, IOException {
050        delegate.provide(element);
051      }
052    
053      @Override
054      public void flush() throws ScriptException, IOException {
055        delegate.flush();
056        if (next != null && next instanceof PipeCommand) {
057          ((PipeCommand)next).flush();
058        }
059      }
060    
061      @Override
062      public void close() throws ScriptException {
063        delegate.close();
064        if (next != null && next instanceof PipeCommand) {
065          ((PipeCommand)next).close();
066        }
067      }
068    }