net.sf.mpxj.fasttrack.FixedSizeItemsBlock Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of mpxj Show documentation

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).

There is a newer version: 13.8.0

Show newest version

/*
 * file:       FixedSizeItemsBlock.java
 * author:     Jon Iles
 * copyright:  (c) Packwood Software 2017
 * date:       14/03/2016
 */

/*
 * 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.fasttrack;

/**
 * Reads data from a block containing fixed size items of data.
 */
class FixedSizeItemsBlock
{
   /**
    * Read data, return the current instance.
    *
    * @param buffer buffer containing data
    * @param offset offset into buffer
    * @return current FixedSizeItemsBlock instance
    */
   public FixedSizeItemsBlock read(byte[] buffer, int offset)
   {
      // Offset to data
      offset += 2;

      int numberOfItems = FastTrackUtility.getInt(buffer, offset);
      offset += 4;

      FastTrackUtility.validateSize(numberOfItems);

      int itemLength = FastTrackUtility.getShort(buffer, offset);
      offset += 2;

      FastTrackUtility.validateSize(itemLength);

      // Offset to end
      offset += 4;

      m_data = new byte[numberOfItems][];
      for (int index = 0; index < m_data.length; index++)
      {
         byte[] item = new byte[itemLength];
         m_data[index] = item;

         FastTrackUtility.validateOffset(buffer, offset + itemLength);

         System.arraycopy(buffer, offset, item, 0, itemLength);
         offset += itemLength;
      }

      m_offset = offset;

      return this;
   }

   /**
    * Retrieve the data read from this block.
    *
    * @return data
    */
   public byte[][] getData()
   {
      return m_data;
   }

   /**
    * Retrieve the offset into the block after the data has been read.
    *
    * @return offset
    */
   public int getOffset()
   {
      return m_offset;
   }

   private byte[][] m_data;
   private int m_offset;
}