ObjectFieldInfo.cs

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//-----------------------------------------------------------------------
// <copyright file="ObjectFieldInfo.cs" company="Marimer LLC">
//     Copyright (c) Marimer LLC. All rights reserved.
//     Website: https://cslanet.com
// </copyright>
// <summary>Contains schema information for a single</summary>
//-----------------------------------------------------------------------
using System;
using System.Web.UI.Design;
using System.ComponentModel;
 
namespace Csla.Web.Design
{
  [Serializable]
  public class ObjectFieldInfo : IDataSourceFieldSchema
  {
    private Type _dataType;
    private bool _primaryKey;
    private bool _isIdentity;
    private bool _isNullable;
    private int _length;
    private bool _isReadOnly;
    private string _name;
    private bool _nullable;
 
    public ObjectFieldInfo(PropertyDescriptor field)
    {
      DataObjectFieldAttribute attribute =
        (DataObjectFieldAttribute)
        field.Attributes[typeof(DataObjectFieldAttribute)];
      if (attribute != null)
      {
        _primaryKey = attribute.PrimaryKey;
        _isIdentity = attribute.IsIdentity;
        _isNullable = attribute.IsNullable;
        _length = attribute.Length;
      }
      _dataType = Utilities.GetPropertyType(
          field.PropertyType);
      _isReadOnly = field.IsReadOnly;
      _name = field.Name;
 
      // nullable
      Type t = field.PropertyType;
      if (!t.IsValueType || _isNullable)
        _nullable = true;
      else
      {
        if (t.IsGenericType)
          _nullable = (t.GetGenericTypeDefinition() == typeof(Nullable<>));
        else
          _nullable = false;
      }
    }
 
    public Type DataType
    {
      get
      {
        return _dataType;
      }
    }
 
    public bool Identity
    {
      get { return _isIdentity; }
    }
 
    public bool IsReadOnly
    {
      get { return _isReadOnly; }
    }
 
    public bool IsUnique
    {
      get { return _primaryKey; }
    }
 
    public int Length
    {
      get { return _length; }
    }
 
    public string Name
    {
      get { return _name; }
    }
 
    public bool Nullable
    {
      get
      { return _nullable; }
    }
 
    public int Precision
    {
      get { return -1; }
    }
 
    public bool PrimaryKey
    {
      get { return _primaryKey; }
    }
 
    public int Scale
    {
      get { return -1; }
    }
  }
}