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.command;
021    
022    import groovy.lang.Closure;
023    import groovy.lang.GroovyObjectSupport;
024    import groovy.lang.MissingMethodException;
025    import groovy.lang.MissingPropertyException;
026    
027    /**
028     * A base command that should be subclasses by Groovy commands. For this matter it inherits the
029     * {@link GroovyObjectSupport} class.
030     *
031     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
032     * @version $Revision$
033     */
034    public abstract class GroovyCommand extends GroovyObjectSupport {
035    
036      protected abstract CommandContext getContext();
037    
038      @Override
039      public final Object invokeMethod(String name, Object args) {
040        try {
041          return super.invokeMethod(name, args);
042        }
043        catch (MissingMethodException e) {
044          CommandContext context = getContext();
045          Object o = context.getAttributes().get(name);
046          if (o instanceof Closure) {
047            Closure closure = (Closure)o;
048            if (args instanceof Object[]) {
049              Object[] array = (Object[])args;
050              if (array.length == 0) {
051                return closure.call();
052              } else {
053                return closure.call(array);
054              }
055            } else {
056              return closure.call(args);
057            }
058          } else {
059            throw e;
060          }
061        }
062      }
063    
064      @Override
065      public final Object getProperty(String property) {
066        try {
067          return super.getProperty(property);
068        }
069        catch (MissingPropertyException e) {
070          CommandContext context = getContext();
071          return context.getAttributes().get(property);
072        }
073      }
074    
075      @Override
076      public final void setProperty(String property, Object newValue) {
077        try {
078          super.setProperty(property, newValue);
079        }
080        catch (MissingPropertyException e) {
081          CommandContext context = getContext();
082          context.getAttributes().put(property, newValue);
083        }
084      }
085    }