/*

  * Copyright 2012 smartics, Kronseder & Reiner GmbH

  *

  * Licensed 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 de.smartics.ci.config.hudson;

 import org.jdom.Document;

 import org.jdom.Element;

 import org.jdom.JDOMException;

 import org.jdom.xpath.XPath;

 import de.smartics.ci.config.utils.JDomUtils;

 /**

  * Creates a Hudson configuration element for the scm information.

  *

  * @see HudsonConfigEntry#addScmConfig(ScmType, String)

  */

 public final class HudsonConfigScmElement extends AbstractHudsonConfigHelper

 {

   // ********************************* Fields *********************************

   // --- constants ------------------------------------------------------------

   // --- members --------------------------------------------------------------

   // ****************************** Initializer *******************************

   // ****************************** Constructors ******************************

   /**

    * Constructor.

    *

    * @param hudsonConfig the Hudson configuration XML file to add to.

    * @see de.smartics.ci.config.hudson.AbstractHudsonConfigHelper#AbstractHudsonConfigHelper(org.jdom.Document)

    */

   public HudsonConfigScmElement(final Document hudsonConfig)

   {

     super(hudsonConfig);

   }

   // ****************************** Inner Classes *****************************

   // ********************************* Methods ********************************

   // --- init -----------------------------------------------------------------

   // --- get&set --------------------------------------------------------------

   // --- business -------------------------------------------------------------

   /**

    * Adds information for the given SCM provider as an element to the document.

    *

    * @param scmType the type of the SCM provider to add.

    * @param scmUrl the connection URL to the SCM server.

    * @throws JDOMException on any problem accessing the Hudson configuration XML

    *           document.

    */

   public void addScmConfig(final ScmType scmType, final String scmUrl)

     throws JDOMException

   {

     final String xpathString = "/maven2-moduleset/scm";

     final XPath xPathScm = XPath.newInstance(xpathString);

     final Element scmElement =

         (Element) xPathScm.selectSingleNode(hudsonConfig);

     if (scmElement == null)

     {

       final Element scm = new Element("scm");

       scm.setAttribute("class", scmType.getId());

       final Element locations = scmType.create(scmUrl);

       scm.addContent(locations);

       hudsonConfig.getRootElement().addContent(scm);

     }

     else

     {

       final XPath xpath = scmType.createScmUrlSelectionXPath(xpathString);

       final Element scmUrlElement =

           (Element) xpath.selectSingleNode(hudsonConfig);

       if (scmUrlElement == null)

       {

         final Element scm = new Element("scm");

         scm.setAttribute("class", scmType.getId());

         final Element locations = scmType.create(scmUrl);

         scm.addContent(locations);

         JDomUtils.merge(scmElement, scm);

       }

       else

       {

         overrideScmUrlValue(scmUrl, scmUrlElement);

       }

     }

   }

   private void overrideScmUrlValue(final String scmUrl,

       final Element scmUrlElement)

   {

     final String scmUrlcontent = scmUrlElement.getTextTrim();

     if (!scmUrl.equals(scmUrlcontent))

     {

       scmUrlElement.setText(scmUrl);

     }

   }

   // --- object basics --------------------------------------------------------

 }