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.repository.sequencers;
023    
024    import java.util.Collection;
025    import java.util.Collections;
026    import java.util.LinkedHashSet;
027    import java.util.Set;
028    import net.jcip.annotations.Immutable;
029    import org.jboss.dna.common.component.ComponentConfig;
030    
031    /**
032     * @author Randall Hauch
033     */
034    @Immutable
035    public class SequencerConfig extends ComponentConfig {
036    
037        private final Set<SequencerPathExpression> pathExpressions;
038    
039        public SequencerConfig( String name, String description, String classname, String[] classpath, String... pathExpressions ) {
040            this(name, description, System.currentTimeMillis(), classname, classpath, pathExpressions);
041        }
042    
043        public SequencerConfig( String name, String description, long timestamp, String classname, String[] classpath, String... pathExpressions ) {
044            super(name, description, timestamp, classname, classpath);
045            this.pathExpressions = buildPathExpressionSet(pathExpressions);
046        }
047    
048        /* package */static Set<SequencerPathExpression> buildPathExpressionSet( String... pathExpressions ) {
049            Set<SequencerPathExpression> result = null;
050            if (pathExpressions != null) {
051                result = new LinkedHashSet<SequencerPathExpression>();
052                for (String pathExpression : pathExpressions) {
053                    if (pathExpression == null) continue;
054                    pathExpression = pathExpression.trim();
055                    if (pathExpression.length() == 0) continue;
056                    result.add(SequencerPathExpression.compile(pathExpression));
057                }
058                result = Collections.unmodifiableSet(result);
059            } else {
060                result = Collections.emptySet(); // already immutable
061            }
062            return result;
063        }
064    
065        public Collection<SequencerPathExpression> getPathExpressions() {
066            return Collections.unmodifiableSet(this.pathExpressions);
067        }
068    
069        public boolean hasChanged( SequencerConfig that ) {
070            if (super.hasChanged(that)) return true;
071            if (!this.getPathExpressions().equals(that.getPathExpressions())) return true;
072            return false;
073        }
074    
075    }