001    /*
002     * Copyright (C) 2010 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.shell.io;
021    
022    import org.crsh.shell.ui.Element;
023    import org.crsh.shell.ui.UIBuilder;
024    import org.crsh.util.AppendableWriter;
025    
026    import java.io.IOException;
027    import java.io.PrintWriter;
028    
029    /**
030     * The shell printer extends the {@link PrintWriter} and prints some objects in a special
031     * manner.
032     *
033     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
034     * @version $Revision$
035     */
036    public class ShellPrinter extends PrintWriter {
037    
038      /** . */
039      private final ShellWriter out;
040    
041      public ShellPrinter(ShellWriter out) {
042        super(new AppendableWriter(out));
043    
044        //
045        this.out = out;
046      }
047    
048      @Override
049      public void println(Object x) {
050        print(x);
051        println();
052      }
053    
054      @Override
055      public void print(Object obj) {
056        if (obj instanceof UIBuilder) {
057          for (Element element : ((UIBuilder)obj).getElements()) {
058            print(element);
059          }
060        } else if (obj instanceof Element) {
061          try {
062            ((Element)obj).print(out);
063          } catch (IOException e) {
064            setError();
065          }
066        } else {
067          super.print(obj);
068        }
069      }
070    }