FixedFieldBuilder.cs :  » Persistence-Frameworks » FileHelpers-Library » FileHelpers » RunTime » C# / CSharp Open Source

using System;
using System.Diagnostics;
using System.Text;
using System.Xml;

namespace FileHelpers.RunTime{
  /// <summary>Used to create Fixed Length fields and set their properties.</summary>
  public sealed class FixedFieldBuilder: FieldBuilder
  {
#if NET_2_0
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
#endif
        private int mFieldLength;

    internal FixedFieldBuilder(string fieldName, int length, Type fieldType): this(fieldName, length, fieldType.FullName)
    {}

    internal FixedFieldBuilder(string fieldName, int length, string fieldType): base(fieldName, fieldType)
    {
      mFieldLength = length;
    }

    /// <summary>The fixed length of the field.</summary>
    public int FieldLength
    {
      get { return mFieldLength; }
      set { mFieldLength = value; }
    }


#if NET_2_0
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
#endif
        private AlignMode mAlignMode = AlignMode.Left;

    /// <summary>The align of the field used for write operations.</summary>
    public AlignMode AlignMode
    {
      get { return mAlignMode; }
      set { mAlignMode = value; }
    }

#if NET_2_0
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
#endif
        private char mAlignChar = ' ';

    /// <summary>The align char of the field used for write operations.</summary>
    public char AlignChar
    {
      get { return mAlignChar; }
      set { mAlignChar = value; }
    }
    
    internal override void AddAttributesCode(AttributesBuilder attbs, NetLanguage lang)
    {
      if (mFieldLength <= 0)
        throw new BadUsageException("The Length of each field must be grater than 0");
      else
        attbs.AddAttribute("FieldFixedLength("+ mFieldLength.ToString() +")");

      if (mAlignMode != AlignMode.Left)
      {
        if (lang == NetLanguage.CSharp)
          attbs.AddAttribute("FieldAlign(AlignMode."+ mAlignMode.ToString()+", '"+ mAlignChar.ToString() +"')");

        else if (lang == NetLanguage.VbNet)
          attbs.AddAttribute("FieldAlign(AlignMode."+ mAlignMode.ToString()+", \""+ mAlignChar.ToString() +"\"c)");
      }

    }

    internal override void WriteHeaderAttributes(XmlHelper writer)
    {
      writer.mWriter.WriteStartAttribute("Length", "");
      writer.mWriter.WriteString(mFieldLength.ToString());
      writer.mWriter.WriteEndAttribute();
    }

    internal override void WriteExtraElements(XmlHelper writer)
    {
      writer.WriteElement("AlignMode", this.AlignMode.ToString(), "Left");
      writer.WriteElement("AlignChar", this.AlignChar.ToString(), " ");
    }

    internal override void ReadFieldInternal(XmlNode node)
    {
      XmlNode ele;
      
      ele = node["AlignChar"];
      if (ele != null) AlignChar = ele.InnerText[0];

      ele = node["AlignMode"];
      if (ele != null) AlignMode = (AlignMode) Enum.Parse(typeof(AlignMode), ele.InnerText);
    }
    
    
  }
}