Commit for development environment setup

PROMS/csla20cs-2.1.4-070223/csla20cs/OLDcsla20cs/Csla/Validation/SharedValidationRules.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+
+namespace Csla.Validation
+{
+  /// <summary>
+  /// Maintains a list of all the per-type
+  /// <see cref="ValidationRulesManager"/> objects
+  /// loaded in memory.
+  /// </summary>
+  internal static class SharedValidationRules
+  {
+    private static Dictionary<Type, ValidationRulesManager> _managers = 
+      new Dictionary<Type, ValidationRulesManager>();
+
+    /// <summary>
+    /// Gets the <see cref="ValidationRulesManager"/> for the 
+    /// specified object type, optionally creating a new instance 
+    /// of the object if necessary.
+    /// </summary>
+    /// <param name="objectType">
+    /// Type of business object for which the rules apply.
+    /// </param>
+    /// <param name="create">Indicates whether to create
+    /// a new instance of the object if one doesn't exist.</param>
+    internal static ValidationRulesManager GetManager(Type objectType, bool create)
+    {
+      ValidationRulesManager result = null;
+      if (!_managers.TryGetValue(objectType, out result) && create)
+      {
+        lock (_managers)
+        {
+          result = new ValidationRulesManager();
+          _managers.Add(objectType, result);
+        }
+      }
+      return result;
+    }
+
+    /// <summary>
+    /// Gets a value indicating whether a set of rules
+    /// have been created for a given <see cref="Type" />.
+    /// </summary>
+    /// <param name="objectType">
+    /// Type of business object for which the rules apply.
+    /// </param>
+    /// <returns><see langword="true" /> if rules exist for the type.</returns>
+    public static bool RulesExistFor(Type objectType)
+    {
+      return _managers.ContainsKey(objectType);
+    }
+  }
+}