001    /*
002     * JBoss, Home of Professional Open Source.
003     * Copyright 2008, Red Hat Middleware LLC, and individual contributors
004     * as indicated by the @author tags. See the copyright.txt file in the
005     * distribution for a full listing of individual contributors. 
006     *
007     * This is free software; you can redistribute it and/or modify it
008     * under the terms of the GNU Lesser General Public License as
009     * published by the Free Software Foundation; either version 2.1 of
010     * the License, or (at your option) any later version.
011     *
012     * This software is distributed in the hope that it will be useful,
013     * but WITHOUT ANY WARRANTY; without even the implied warranty of
014     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015     * Lesser General Public License for more details.
016     *
017     * You should have received a copy of the GNU Lesser General Public
018     * License along with this software; if not, write to the Free
019     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021     */
022    package org.jboss.dna.graph.commands.basic;
023    
024    import java.util.ArrayList;
025    import java.util.Iterator;
026    import java.util.List;
027    import org.jboss.dna.graph.commands.CompositeCommand;
028    import org.jboss.dna.graph.commands.GraphCommand;
029    
030    /**
031     * @author Randall Hauch
032     */
033    public class BasicCompositeCommand extends BasicGraphCommand implements CompositeCommand {
034    
035        private final List<GraphCommand> commands = new ArrayList<GraphCommand>();
036    
037        public BasicCompositeCommand() {
038            super();
039        }
040    
041        public boolean isEmpty() {
042            return commands.isEmpty();
043        }
044    
045        public int size() {
046            return commands.size();
047        }
048    
049        public void add( GraphCommand command ) {
050            if (command != null) commands.add(command);
051        }
052    
053        public GraphCommand getCommand( int index ) {
054            return commands.get(index);
055        }
056    
057        /**
058         * {@inheritDoc}
059         * 
060         * @see java.lang.Iterable#iterator()
061         */
062        public Iterator<GraphCommand> iterator() {
063            return commands.iterator();
064        }
065    
066        public BasicCompositeCommand clearCommands() {
067            this.commands.clear();
068            return this;
069        }
070    
071        /**
072         * {@inheritDoc}
073         * 
074         * @see java.lang.Object#toString()
075         */
076        @Override
077        public String toString() {
078            return this.getClass().getSimpleName() + " (containing " + commands.size() + " commands)";
079        }
080    
081    }