/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-2.0
   * 
   * 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.apache.jetspeed.portlets.rpad.simple;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Locale;
  import java.util.StringTokenizer;
  
  import org.apache.jetspeed.portlets.rpad.PortletApplication;
  import org.xml.sax.Attributes;
  import org.xml.sax.helpers.DefaultHandler;
  
  public class SimpleConfigHandler extends DefaultHandler
  {
  
      private List portletApplications;
  
      private PortletApplication portletApplication;
  
      private List qNameList;
  
      public SimpleConfigHandler()
      {
          portletApplications = new ArrayList();
          qNameList = new ArrayList();
      }
  
      public void startElement(String uri, String localName, String qName,
              Attributes attributes)
      {
          if ("repository".equals(qName))
          {
              //TODO version
              //TODO id
          }
          else if ("portlet".equals(qName))
          {
              portletApplication = new PortletApplication();
  
              String artifactId = attributes.getValue("id");
              if (artifactId != null)
              {
                  portletApplication.setArtifactId(artifactId);
              }
  
              String groupId = attributes.getValue("group");
              if (groupId != null)
              {
                  portletApplication.setGroupId(groupId);
              }
  
              String version = attributes.getValue("version");
              if (version != null)
              {
                  portletApplication.setVersion(version);
              }
          }
          synchronized (qNameList)
          {
              qNameList.add(qName);
          }
      }
  
      public void characters(char[] ch, int start, int length)
      {
          if (qNameList.size() < 1)
          {
              return;
          }
  
          String value = new String(ch, start, length);
          String qName = (String) qNameList.get(qNameList.size() - 1);
          String parentQName;
          if (qNameList.size() - 2 >= 0)
          {
              parentQName = (String) qNameList.get(qNameList.size() - 2);
          }
          else
          {
              parentQName = "";
          }
          if ("portletSpecVersion".equals(qName))
          {
              portletApplication.setPortletSpecVersion(value);
         }
         else if ("packaging".equals(qName))
         {
             portletApplication.setPackaging(value);
         }
         else if ("name".equals(qName))
         {
             if ("publisher".equals(parentQName))
             {
                 portletApplication.setPublisherName(value);
             }
             else if ("license".equals(parentQName))
             {
                 portletApplication.setLicenseName(value);
             }
             else
             {
                 portletApplication.setName(value);
             }
         }
         else if ("description".equals(qName))
         {
             portletApplication.setDescription(value);
         }
         else if ("tag".equals(qName))
         {
             portletApplication.addTag(value);
         }
         else if ("url".equals(qName))
         {
             if ("publisher".equals(parentQName))
             {
                 portletApplication.setPublisherUrl(value);
             }
             else if ("license".equals(parentQName))
             {
                 portletApplication.setLicenseUrl(value);
             }
         }
         else if ("binaryURL".equals(qName))
         {
             portletApplication.setBinaryUrl(value);
         }
         else if ("sourceURL".equals(qName))
         {
             portletApplication.setSourceUrl(value);
         }
         else if ("imageURL".equals(qName))
         {
             portletApplication.setImageUrl(value);
         }
         //TODO dependencies
         //TODO license
         else if ("compiledJDKVersion".equals(qName))
         {
             portletApplication.setCompiledJDKVersion(value);
         }
         else if ("locale".equals(qName))
         {
             Locale l = getLocaleFromString(value);
             if (l != null)
             {
                 portletApplication.addSupportedLocale(l);
             }
         }
 
     }
 
     private Locale getLocaleFromString(String localeString)
     {
         StringTokenizer st = new StringTokenizer(localeString, "_-");
         String[] buf = new String[3];
         int count = 0;
         while (st.hasMoreTokens())
         {
             buf[count] = st.nextToken();
             count++;
         }
         if (count > 2)
         {
             return new Locale(buf[0], buf[1], buf[2]);
         }
         else if (count > 1)
         {
             return new Locale(buf[0], buf[1]);
         }
         else if (count > 0)
         {
             return new Locale(buf[0]);
         }
         return null;
     }
 
     public void endElement(String uri, String localName, String qName)
     {
         if ("portlet".equals(qName))
         {
             portletApplications.add(portletApplication);
             portletApplication = null;
         }
 
         synchronized (qNameList)
         {
             if (qNameList.size() < 1)
             {
                 throw new IllegalStateException("The stacked QName is 0.");
             }
             String stackedQName = (String) qNameList
                     .remove(qNameList.size() - 1);
             if (!qName.equals(stackedQName))
             {
                 throw new IllegalStateException("The expected QName is "
                         + stackedQName + ". But the current value is " + qName);
             }
         }
     }
 
     /***
      * @return the portletApplications
      */
     public List getPortletApplications()
     {
         return portletApplications;
     }
 
     /***
      * @param portletApplications the portletApplications to set
      */
     public void setPortletApplications(List portletApplications)
     {
         this.portletApplications = portletApplications;
     }
 }