mcs/class/System/System.ComponentModel/DataObjectFieldAttribute.cs

   1 //
   2 // Copyright 2006 Novell, Inc (http://www.novell.com)
   3 //
   4 // Authors:
   5 //      Miguel de Icaza <miguel@novell.com>
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 #if NET_2_0
  28
  29 using System;
  30 using System.Collections.Generic;
  31 using System.Text;
  32
  33 namespace System.ComponentModel
  34 {
  35         [AttributeUsageAttribute (AttributeTargets.Property)]
  36         public sealed class DataObjectFieldAttribute : Attribute
  37         {
  38                 bool primary_key, is_identity, is_nullable;
  39                 int length = -1;
  40
  41                 public DataObjectFieldAttribute (bool primaryKey)
  42                 {
  43                         primary_key = primaryKey;
  44                 }
  45
  46                 public DataObjectFieldAttribute (bool primaryKey, bool isIdentity)
  47                 {
  48                         primary_key = primaryKey;
  49                         is_identity = isIdentity;
  50                 }
  51
  52                 public DataObjectFieldAttribute (bool primaryKey, bool isIdentity, bool isNullable)
  53                 {
  54                         primary_key = primaryKey;
  55                         is_identity = isIdentity;
  56                         is_nullable = isNullable;
  57                 }
  58
  59                 public DataObjectFieldAttribute (bool primaryKey, bool isIdentity, bool isNullable, int length)
  60                 {
  61                         primary_key = primaryKey;
  62                         is_identity = isIdentity;
  63                         is_nullable = isNullable;
  64                         this.length = length;
  65                 }
  66
  67                 public bool IsIdentity {
  68                         get { return is_identity; }
  69                 }
  70
  71                 public bool IsNullable {
  72                         get { return is_nullable; }
  73                 }
  74
  75                 public int Length {
  76                         get { return length; }
  77                 }
  78
  79                 public bool PrimaryKey {
  80                         get { return primary_key; }
  81                 }
  82
  83                 public override bool Equals (object obj)
  84                 {
  85                         DataObjectFieldAttribute other = obj as DataObjectFieldAttribute;
  86                         if (other == null)
  87                                 return false;
  88
  89                         return other.primary_key == primary_key &&
  90                                 other.is_identity == is_identity &&
  91                                 other.is_nullable == is_nullable &&
  92                                 other.length == length;
  93                 }
  94
  95                 public override int GetHashCode ()
  96                 {
  97                         return ((primary_key ? 1 : 0) |
  98                                 (is_identity ? 2 : 0) |
  99                                 (is_nullable ? 4 : 0)) ^
 100                                 length;
 101
 102                 }
 103         }
 104 }
 105
 106 #endif