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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:       EnumHelper.java
 * author:     Jon Iles
 * copyright:  (c) Packwood Software 2010
 * date:       31/03/2010
 */

/*
 * 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.common;

import java.lang.reflect.Array;
import java.util.EnumSet;

import net.sf.mpxj.MpxjEnum;

/**
 * Utility method for working with enumerations.
 */
public final class EnumHelper
{
   /**
    * Creates a lookup array based on the "value" associated with an MpxjEnum.
    *
    * @param  target enumeration
    * @param c enumeration class
    * @return lookup array
    */
   public static final > E[] createTypeArray(Class c)
   {
      return createTypeArray(c, 0);
   }

   /**
    * Creates a lookup array based on the "value" associated with an MpxjEnum.
    *
    * @param  target enumeration
    * @param c enumeration class
    * @param arraySizeOffset offset to apply to the array size
    * @return lookup array
    */
   @SuppressWarnings(
   {
      "unchecked"
   }) public static final > E[] createTypeArray(Class c, int arraySizeOffset)
   {
      EnumSet set = EnumSet.allOf(c);
      E[] array = (E[]) Array.newInstance(c, set.size() + arraySizeOffset);

      for (E e : set)
      {
         int index = ((MpxjEnum) e).getValue();
         if (index >= 0)
         {
            array[index] = e;
         }
      }
      return array;
   }
}