001    /******************************************************************************
002     * Copyright (C) MActor Developers. All rights reserved.                        *
003     * ---------------------------------------------------------------------------*
004     * This file is part of MActor.                                               *
005     *                                                                            *
006     * MActor is free software; you can redistribute it and/or modify             *
007     * it under the terms of the GNU General Public License as published by       *
008     * the Free Software Foundation; either version 2 of the License, or          *
009     * (at your option) any later version.                                        *
010     *                                                                            *
011     * MActor 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              *
014     * GNU General Public License for more details.                               *
015     *                                                                            *
016     * You should have received a copy of the GNU General Public License          *
017     * along with MActor; if not, write to the Free Software                      *
018     * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA *
019     ******************************************************************************/
020    package org.mactor.extensions.xml;
021    
022    import java.util.HashMap;
023    import java.util.List;
024    import java.util.Map.Entry;
025    
026    import org.dom4j.Document;
027    import org.dom4j.Node;
028    import org.dom4j.XPath;
029    import org.mactor.brokers.Message;
030    import org.mactor.framework.MactorException;
031    import org.mactor.framework.extensioninterface.MessageSelectorCommand;
032    
033    /**
034     * Selects all messages matching the XPath/regexp expressions specified in the
035     * parameters. <br/> The syntax of a parameters are:<br>
036     * [XPath expression that selects the single attribute or element ]==[a regular
037     * expression that the field must match] <br/> I.e. the following setup matches
038     * alle messages containing an Name field with a value starting with 'MrMan'
039     * 
040     * <pre>
041     *  &lt;message_selector command=&quot;java:org.mactor.extensions.xml.XPathIgnoreNsMessageSelector&quot;&gt; 
042     *     &lt;param&gt;//Name==MrMan.*&lt;/param&gt; 
043     *  &lt;/message_selector&gt; 
044     * </pre>
045     * 
046     * Namespace information in the evaluated messages is ignored, so the XPath
047     * expressions must not include namespace prefixes
048     * 
049     * @author Lars Ivar Almli
050     */
051    public class XPathIgnoreNsRegExpMessageSelector implements MessageSelectorCommand {
052            private HashMap<XPath, String> map = new HashMap<XPath, String>();
053            public void setParams(List<String> params) throws MactorException {
054                    this.map = ParamUtil.parseXPathParams(params);
055            }
056            public boolean isAcceptableMessage(Message message) {
057                    try {
058                            Document doc = message.getContentDocumentNoNs();
059                            if (map.size() == 0) {
060                                    return true;
061                            }
062                            for (Entry<XPath, String> e : map.entrySet()) {
063                                    Node n = e.getKey().selectSingleNode(doc);
064                                    if (n == null || !ParamUtil.isMatch(n.getText(), e.getValue()))
065                                            return false;
066                            }
067                            return true;
068                    } catch (MactorException ce) {
069                            ce.printStackTrace();
070                            return false;
071                    }
072            }
073    }