Dataset.cs :  » Network-Clients » DICOM » org » dicomcs » data » C# / CSharp Open Source

#region Copyright
// 
// This library is based on dcm4che see http://www.sourceforge.net/projects/dcm4che
// Copyright (c) 2002 by TIANI MEDGRAPH AG. All rights reserved.
//
// Modifications Copyright (C) 2002 Fang Yang. All rights reserved.
// 
// This file is part of dicomcs, see http://www.sourceforge.net/projects/dicom-cs
//
// 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 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
//
// Fang Yang (yangfang@email.com)
//
#endregion

namespace org.dicomcs.data{
  using System;
  using System.IO;
  using System.Reflection;
  using System.Text;
  using org.dicomcs.data;
  using Tags = org.dicomcs.dict.Tags;
  
  /// <summary>
  /// Implementation of <code>Dataset</code> container objects.
  /// </summary>
  public class Dataset : BaseDataset
  {
    private static readonly log4net.ILog log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

    public override String PrivateCreatorID
    {
      get
      {
        return privateCreatorID != null?privateCreatorID:parent != null?parent.PrivateCreatorID:null;
      }      
      set
      {
        this.privateCreatorID = value;
      }      
    }
    public virtual Encoding Encoding
    {
      get
      {
        return encoding != null?encoding:parent != null?parent.Encoding:null;
      }      
    }
    public virtual Dataset Parent
    {
      get
      {
        return parent;
      }      
    }        
    
    private readonly Dataset parent;
    private Encoding encoding = null;
    private String privateCreatorID = null;
    private long itemOffset = - 1L;
    
    public Dataset(): this(null)
    {
    }
    
    public Dataset(Dataset parent)
    {
      this.parent = parent;
    }

    public override long GetItemOffset()
    {
      if (itemOffset != - 1L || m_list.Count == 0)
        return itemOffset;
      
      long elm1pos = ((DcmElement) m_list[0]).StreamPosition;
      return elm1pos == - 1L?- 1L:elm1pos - 8L;
    }
    public override Dataset SetItemOffset( long itemOffset )
    {
      this.itemOffset = itemOffset;
      return this;
    }
  
    public override DcmElement PutSQ(uint tag)
    {
      return Put(new SQElement(tag, this));
    }
    
    public override DcmElement Put(DcmElement newElem)
    {
      if ((newElem.tag())>>16 < 4)
      {
        throw new System.ArgumentException(newElem.ToString());
      }
      
      if (newElem.tag() == Tags.SpecificCharacterSet)
      {
        try
        {
          //TODO: decide the encoding
          //this.encoding = Encodings.lookup(newElem.GetStrings(null));
        }
        catch (System.Exception ex)
        {
          log.Warn("Failed to consider specified Encoding!", ex);
          this.encoding = null;
        }
      }
      
      return base.Put(newElem);
    }
    
    public override DcmElement Remove(uint tag)
    {
      if (tag == Tags.SpecificCharacterSet)
        encoding = null;
      return base.Remove(tag);
    }
    
    public override void  Clear()
    {
      base.Clear();
      encoding = null;
      totLen = 0;
    }
    
    public virtual void  ReadFile(Stream ins, FileFormat format, uint stopTag)
    {
      DcmParser Parser = new DcmParser(ins);
      Parser.DcmHandler = DcmHandler;
      Parser.ParseDcmFile(format, stopTag);
    }

    public virtual void  ReadDataset(Stream ins, DcmDecodeParam param, uint stopTag)
    {
      DcmParser Parser = new DcmParser(ins);
      Parser.DcmHandler = DcmHandler;
      Parser.ParseDataset(param, stopTag);
    }    

  }
}