Commit for development environment setup

PROMS/csla20cs-2.1.4-070223/csla20cs/OLDcsla20cs/Csla/Web/Design/ObjectFieldInfo.cs

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+using System;
+using System.Data;
+using System.Web.UI;
+using System.Web.UI.Design;
+using System.ComponentModel;
+using System.Reflection;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Csla.Web.Design
+{
+  /// <summary>
+  /// Contains schema information for a single
+  /// object property.
+  /// </summary>
+  [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;
+
+    /// <summary>
+    /// Creates an instance of the object.
+    /// </summary>
+    /// <param name="field">The PropertyInfo object
+    /// describing the property.</param>
+    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;
+      }
+    }
+
+    /// <summary>
+    /// Gets the data type of the property.
+    /// </summary>
+    public Type DataType
+    {
+      get
+      {
+        return _dataType;
+      }
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether this property
+    /// is an identity key for the object.
+    /// </summary>
+    /// <remarks>
+    /// Returns the optional value provided through
+    /// the <see cref="DataObjectFieldAttribute">DataObjectField</see>
+    /// attribute on the property.
+    /// </remarks>
+    public bool Identity
+    {
+      get { return _isIdentity; }
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether this property
+    /// is readonly.
+    /// </summary>
+    public bool IsReadOnly
+    {
+      get { return _isReadOnly; }
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether this property
+    /// must contain a unique value.
+    /// </summary>
+    /// <returns>
+    /// Always returns True if the property
+    /// is marked as a primary key, otherwise
+    /// returns False.
+    /// </returns>
+    public bool IsUnique
+    {
+      get { return _primaryKey; }
+    }
+
+    /// <summary>
+    /// Gets the length of the property value.
+    /// </summary>
+    /// <remarks>
+    /// Returns the optional value provided through
+    /// the <see cref="DataObjectFieldAttribute">DataObjectField</see>
+    /// attribute on the property.
+    /// </remarks>
+    public int Length
+    {
+      get { return _length; }
+    }
+
+    /// <summary>
+    /// Gets the property name.
+    /// </summary>
+    public string Name
+    {
+      get { return _name; }
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether the property
+    /// is nullable
+    /// </summary>
+    /// <remarks>
+    /// Returns True for reference types, and for
+    /// value types wrapped in the Nullable generic.
+    /// The result can also be set to True through
+    /// the <see cref="DataObjectFieldAttribute">DataObjectField</see>
+    /// attribute on the property.
+    /// </remarks>
+    public bool Nullable
+    {
+      get
+      { return _nullable; }
+    }
+
+    /// <summary>
+    /// Gets the property's numeric precision.
+    /// </summary>
+    /// <returns>Always returns -1.</returns>
+    public int Precision
+    {
+      get { return -1; }
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether the property
+    /// is a primary key value.
+    /// </summary>
+    /// <remarks>
+    /// Returns the optional value provided through
+    /// the <see cref="DataObjectFieldAttribute">DataObjectField</see>
+    /// attribute on the property.
+    /// </remarks>
+    public bool PrimaryKey
+    {
+      get { return _primaryKey; }
+    }
+
+    /// <summary>
+    /// Gets the property's scale.
+    /// </summary>
+    /// <returns>Always returns -1.</returns>
+    public int Scale
+    {
+      get { return -1; }
+    }
+  }
+}