mcs/class/System.Web.DynamicData/Test/ModelProviders/DynamicDataContainerColumnProvider.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Web;
   5 using System.Web.DynamicData;
   6 using System.Web.DynamicData.ModelProviders;
   7
   8 using MonoTests.DataSource;
   9
  10 namespace MonoTests.ModelProviders
  11 {
  12         public class DynamicDataContainerColumnProvider : ColumnProvider
  13         {
  14                 DynamicDataColumn column;
  15                 bool associationResolved;
  16
  17                 public override AssociationProvider Association {
  18                         get {
  19                                 ResolveAssociations ();
  20                                 return base.Association;
  21                         }
  22
  23                         protected set {
  24                                 base.Association = value;
  25                         }
  26                 }
  27
  28                 public DynamicDataContainerColumnProvider (DynamicDataContainerTableProvider owner, DynamicDataColumn column)
  29                         : base (owner)
  30                 {
  31                         if (column == null)
  32                                 throw new ArgumentNullException ("column");
  33
  34                         this.column = column;
  35
  36                         Type columnType = column.DataType;
  37                         if (columnType == null)
  38                                 throw new InvalidOperationException ("column.DataType must not be null for column '" + column.Name + "'");
  39
  40                         Name = column.Name;
  41                         ColumnType = columnType;
  42                         Nullable = columnType.IsGenericType && typeof (Nullable<>).IsAssignableFrom (columnType.GetGenericTypeDefinition ());
  43                         IsPrimaryKey = column.PrimaryKey;
  44                 }
  45
  46                 public void ResolveAssociations ()
  47                 {
  48                         if (associationResolved)
  49                                 return;
  50
  51                         associationResolved = true;
  52                         string associated = column.AssociatedTo;
  53                         if (String.IsNullOrEmpty (associated))
  54                                 return;
  55
  56                         string[] names = associated.Split (new char[] { '.' });
  57                         if (names.Length != 2)
  58                                 throw new ApplicationException ("Only associations of type Table.Column are supported");
  59                         string tableName = names[0];
  60                         string columnName = names[1];
  61
  62                         TableProvider tableProvider = null;
  63                         try {
  64                                 tableProvider = Table.DataModel.Tables.First<TableProvider> ((TableProvider tp) => {
  65                                         if (tp.Name == tableName)
  66                                                 return true;
  67                                         return false;
  68                                 });
  69                         } catch {
  70                                 return;
  71                         }
  72
  73                         if (tableProvider == null)
  74                                 return;
  75
  76                         ColumnProvider toColumn = null;
  77
  78                         try {
  79                                 toColumn = tableProvider.Columns.First<ColumnProvider> ((ColumnProvider cp) => {
  80                                         if (cp.Name == columnName)
  81                                                 return true;
  82                                         return false;
  83                                 });
  84                         } catch {
  85                                 return;
  86                         }
  87
  88                         if (toColumn == null)
  89                                 return;
  90
  91                         IsForeignKeyComponent = true;
  92                         Association = new DynamicDataAssociationProvider (column.AssociationDirection, this, toColumn);
  93                 }
  94         }
  95 }