SQElement.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.Text;
  using System.Collections;
  using org.dicomcs.data;
  using org.dicomcs.dict;
  
  /// <summary>
  /// </summary>
  public class SQElement : DcmElement
  {    
    private ArrayList m_list = new ArrayList();
    private Dataset parent;
    private int totlen = - 1;
    
    /// <summary>
    /// Creates a new instance of ElementImpl 
    /// </summary>
    public SQElement(uint tag, Dataset parent):base(tag)
    {
      this.parent = parent;
    }
    
    public override int vr()
    {
      return VRs.SQ;
    }
    
    public override int vm()
    {
      return m_list.Count;
    }
    
    public override bool HasItems()
    {
      return true;
    }
    
    public override Dataset GetItem(int index)
    {
      if (index >= vm())
      {
        return null;
      }
      return (Dataset) m_list[index];
    }
    
    public override void  AddItem(Dataset item)
    {
      m_list.Add(item);
    }
    
    public override Dataset AddNewItem()
    {
      Dataset item = new Dataset(parent);
      m_list.Add(item);
      return item;
    }
    
    public virtual int CalcLength(DcmEncodeParam param)
    {
      totlen = param.undefSeqLen?8:0;
       for (int i = 0, n = vm(); i < n; ++i)
        totlen += GetItem(i).CalcLength(param) + (param.undefItemLen?16:8);
      return totlen;
    }
    
    public override int length()
    {
      return totlen;
    }
    
    public override System.String ToString()
    {
      StringBuilder sb = new StringBuilder( org.dicomcs.dict.Tags.ToHexString(tag()));
      sb.Append(",SQ");
      if (!IsEmpty())
      {
        for (int i = 0, n = vm(); i < n; ++i)
        {
          sb.Append("\n\tItem-").Append(i + 1).Append(GetItem(i));
        }
      }
      return sb.ToString();
    }
  }
}