StartInsertItemListener.java

/**********************************************************************************
 * $URL: https://source.sakaiproject.org/svn/sam/trunk/samigo-app/src/java/org/sakaiproject/tool/assessment/ui/listener/author/StartInsertItemListener.java $
 * $Id: StartInsertItemListener.java 106463 2012-04-02 12:20:09Z david.horwitz@uct.ac.za $
 ***********************************************************************************
 *
 * Copyright (c) 2004, 2005, 2006, 2008 The Sakai 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/ECL-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.sakaiproject.tool.assessment.ui.listener.author;

import javax.faces.event.AbortProcessingException;
import javax.faces.event.ValueChangeEvent;
import javax.faces.event.ValueChangeListener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.sakaiproject.tool.assessment.ui.bean.author.ItemAuthorBean;
import org.sakaiproject.tool.assessment.ui.listener.util.ContextUtil;
import javax.faces.component.UIComponent;
import javax.faces.component.UISelectOne;
import java.util.List;
import javax.faces.component.UISelectItem;
import javax.faces.component.UISelectItems;

/**
 * <p>Title: Samigo</p>
 * <p>Description: Sakai Assessment Manager</p>
 * @version $Id: StartInsertItemListener.java 106463 2012-04-02 12:20:09Z david.horwitz@uct.ac.za $
 */

public class StartInsertItemListener implements ValueChangeListener
{
    private static Log log = LogFactory.getLog(StartInsertItemListener.class);


  /**
   * Standard process action method.
   * @param ae ValueChangeEvent
   * @throws AbortProcessingException
   */
  public void processValueChange(ValueChangeEvent ae) throws AbortProcessingException
  {
    //log.info("StartInsertItemListener valueChangeLISTENER.");
    ItemAuthorBean itemauthorbean = (ItemAuthorBean) ContextUtil.lookupBean("itemauthor");

    String olditemtype = (String) ae.getOldValue();
    log.debug("StartInsertItemListener olditemtype ." + olditemtype);
    String selectedvalue= (String) ae.getNewValue();
    log.debug("StartInsertItemListener selecteevalue." + selectedvalue);
    String newitemtype = null;
    String insertItemPosition = null;
    String insertToSection = null;

    // only set itemtype when the value has indeed changed.
    if ((selectedvalue!=null) && (!selectedvalue.equals("")) ){
      String[] strArray = selectedvalue.split(",");

      try
      {
        newitemtype = strArray[0].trim();
        ///////// SAK-3114: ///////////////////////////////////////////
        // note: you must include at least one selectItem in the form
        // type#,p#,q#
        // the rest, in a selectItems will get the p#,q# added in.
        ///////////////////////////////////////////////////////////////
        if (strArray.length < 2)
        {
          UISelectOne comp = (UISelectOne) ae.getComponent();
          List children = comp.getChildren();
          // right now there are two kids selectItems & selectItem
          // we use loop to keep this flexible
          for (int i = 0; i < children.size(); i++) {

            if (children.get(i) instanceof UISelectItem)
            {
              UISelectItem selectItem = (UISelectItem) children.get(i);
    	      log.debug("***" + i + "***");
              log.debug("selectItem.getItemValue()="+selectItem.getItemValue());
              String itemValue =  (String) selectItem.getItemValue();
              log.debug("itemValue ="+ itemValue);
              String[] insertArray = itemValue.split(",");
              // add in p#,q#
              insertToSection = insertArray[1].trim();
              
              // SAK-3160: workaround
              /*
               It seems very difficult to track down why the sequence number is
               getting lost in the JSF lifecycle in the nested lists in the
               backing beans (it appears) when there is more than one part.

               Therefore I have added a workaround fix that supplies 0 for the
               sequence number if it is not available.

               This fixes two things.
                1. No error or warning is logged
                2. The type of item chosen is retained, and in the correct part.
                
              if (insertArray.length > 2)
              {
                insertItemPosition = insertArray[2].trim();
              }
              else
              {
                insertItemPosition = "0";
              }
              */
              break;
            }
        	if (ContextUtil.lookupParam("itemSequence") != null &&
      	          !ContextUtil.lookupParam("itemSequence").trim().equals("")) {
        	  insertItemPosition = ContextUtil.lookupParam("itemSequence");
        	}
          }
        }
        else
        {
          insertToSection = strArray[1].trim();
          insertItemPosition = strArray[2].trim();
        }
      }
      catch (Exception ex)
      {
        log.warn("unable to process value change: " + ex);
//        ex.printStackTrace();
        return;
      }
      itemauthorbean.setItemType(newitemtype);
      itemauthorbean.setInsertToSection(insertToSection);
      itemauthorbean.setInsertPosition(insertItemPosition);
      itemauthorbean.setInsertType(newitemtype);
      itemauthorbean.setItemNo(String.valueOf(Integer.parseInt(insertItemPosition) +1));
      // clean up before new question SAK-6506  
      itemauthorbean.setAttachmentList(null);
      itemauthorbean.setResourceHash(null);

    log.debug("new itemtype." + newitemtype);
    log.debug("new insert to secction." + insertToSection);
    log.debug("new insert to pos ." + insertItemPosition);
    log.debug("new temno ." + itemauthorbean.getItemNo());

    StartCreateItemListener listener = new StartCreateItemListener();

    if (!listener.startCreateItem(itemauthorbean))
    {
      throw new RuntimeException("failed to startCreatItem.");
    }


    }

  }


}