/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kew.engine.node;

 import java.io.StringReader;

 import javax.xml.parsers.DocumentBuilder;

 import javax.xml.parsers.DocumentBuilderFactory;

 import org.apache.log4j.Level;

 import org.apache.log4j.Logger;

 import org.kuali.rice.kew.engine.RouteContext;

 import org.kuali.rice.kew.engine.RouteHelper;

 import org.kuali.rice.kew.engine.node.var.PropertyScheme;

 import org.w3c.dom.Document;

 import org.w3c.dom.Element;

 import org.w3c.dom.NodeList;

 import org.xml.sax.InputSource;

 /**

  * A node which Logs messages to Log4j.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class LogNode implements SimpleNode {

     private static final Logger LOG = Logger.getLogger(LogNode.class);

     public SimpleResult process(RouteContext context, RouteHelper helper) throws Exception {

         LOG.error("processing");

         DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();

         String contentFragment = context.getNodeInstance().getRouteNode().getContentFragment();

         LOG.error("contentFragment=" + contentFragment);

         Document d = db.parse(new InputSource(new StringReader(contentFragment)));

         Element e = d.getDocumentElement();

         String name = null;

         NodeList list = e.getElementsByTagName("log");

         if (list != null && list.getLength() > 0) {

             name = list.item(0).getTextContent();

         }

         list = e.getElementsByTagName("level");

         String level = "info";

         if (list != null && list.getLength() > 0) {

             level = list.item(0).getTextContent().toLowerCase();

         }

         LOG.error("doc content: "+ context.getDocument().getDocContent());

         String valueRef = e.getElementsByTagName("message").item(0).getTextContent();

         Object retrievedVal = PropertiesUtil.retrieveProperty(valueRef, PropertyScheme.LITERAL_SCHEME, context);

         LOG.error("retrieved value '" + retrievedVal + " for message '" + valueRef);

         Logger l;

         if (name == null) {

             l = LOG;

         } else {

             l = Logger.getLogger(name);

         }

         l.log(Level.toLevel(level), retrievedVal);

         return new SimpleResult(true);

     }

 }