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Library that provides facilities to allow project information to be manipulated in Java and .Net. Supports a range of data formats: Microsoft Project Exchange (MPX), Microsoft Project (MPP,MPT), Microsoft Project Data Interchange (MSPDI XML), Microsoft Project Database (MPD), Planner (XML), Primavera (PM XML, XER, and database), Asta Powerproject (PP, MDB), Asta Easyplan (PP), Phoenix Project Manager (PPX), FastTrack Schedule (FTS), and the Standard Data Exchange Format (SDEF).

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/*
 * file:       ViewStateReader.java
 * author:     Jon Iles
 * copyright:  (c) Packwood Software 2007
 * date:       Jan 07, 2007
 */

/*
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

package net.sf.mpxj.mpp;

import java.io.IOException;
import java.util.LinkedList;
import java.util.List;

import net.sf.mpxj.ProjectFile;
import net.sf.mpxj.ViewState;

/**
 * This class allows the saved state of a view to be read from an MPP file.
 */
public abstract class ViewStateReader
{
   /**
    * Retrieves the props data using a file format specific method.
    *
    * @param varData var data block
    * @return props data
    * @throws IOException
    */
   protected abstract Props getProps(Var2Data varData) throws IOException;

   /**
    * Entry point for processing saved view state.
    *
    * @param file project file
    * @param varData view state var data
    * @param fixedData view state fixed data
    * @throws IOException
    */
   public void process(ProjectFile file, Var2Data varData, byte[] fixedData) throws IOException
   {
      Props props = getProps(varData);
      //System.out.println(props);
      if (props != null)
      {
         String viewName = MPPUtility.removeAmpersands(props.getUnicodeString(VIEW_NAME));
         byte[] listData = props.getByteArray(VIEW_CONTENTS);
         List uniqueIdList = new LinkedList();
         if (listData != null)
         {
            for (int index = 0; index < listData.length; index += 4)
            {
               Integer uniqueID = Integer.valueOf(MPPUtility.getInt(listData, index));

               //
               // Ensure that we have a valid task, and that if we have and
               // ID of zero, this is the first task shown.
               //
               if (file.getTaskByUniqueID(uniqueID) != null && (uniqueID.intValue() != 0 || index == 0))
               {
                  uniqueIdList.add(uniqueID);
               }
            }
         }

         int filterID = MPPUtility.getShort(fixedData, 128);

         ViewState state = new ViewState(file, viewName, uniqueIdList, filterID);
         file.getViews().setViewState(state);
      }
   }

   private static final Integer VIEW_NAME = Integer.valueOf(641728536);
   private static final Integer VIEW_CONTENTS = Integer.valueOf(641728565);
}