001    /*
002     * hammurapi-rules @mesopotamia.version@
003     * Hammurapi rules engine. 
004     * Copyright (C) 2005  Hammurapi Group
005     *
006     * This program is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 2 of the License, or (at your option) any later version.
010     *
011     * This program is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with this library; if not, write to the Free Software
018     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019     *
020     * URL: http://http://www.hammurapi.biz
021     * e-Mail: support@hammurapi.biz
022     */
023    package biz.hammurapi.rules;
024    
025    import javax.xml.transform.TransformerException;
026    
027    import org.w3c.dom.Element;
028    import org.w3c.dom.Node;
029    
030    import biz.hammurapi.config.ConfigurationException;
031    import biz.hammurapi.config.DomConfigurableContainer;
032    import biz.hammurapi.config.RuntimeConfigurationException;
033    import biz.hammurapi.xml.dom.DOMUtils;
034    
035    
036    /**
037     * Base class for containers of rules.
038     * Implements getComponentName() method which returns value of <code><rule>/<name></code> element.
039     * @author Pavel Vlasov
040     * @revision $Revision$
041     */
042    public abstract class RulesContainerBase extends DomConfigurableContainer implements KnowledgeBase {
043            
044            public RulesContainerBase() {
045                    super();
046            }
047            
048            protected String getComponentName(Node node) {
049                    try {
050                            return DOMUtils.getSingleNonBlankElementText((Element) node, "name");
051                    } catch (ConfigurationException e) {
052                            throw new RuntimeConfigurationException("Cannot read rule name: "+e, e);
053                    } catch (TransformerException e) {
054                            throw new RuntimeConfigurationException("Cannot read rule name: "+e, e);
055                    }
056            }
057    }