Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Activities/Role/DirectoryRootQuery.cs

@@ -0,0 +1,73 @@
+#region Using directives
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.DirectoryServices;
+
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    sealed internal class DirectoryRootQuery : IDirectoryOperation
+    {
+        private String m_name;
+        private String m_value;
+        private DirectoryQueryOperation m_operation;
+
+        public DirectoryRootQuery(String name, String value, DirectoryQueryOperation operation)
+        {
+            if (name == null)
+                throw new ArgumentNullException("name");
+            if (value == null)
+                throw new ArgumentNullException("value");
+
+            this.m_name = name;
+            this.m_value = value;
+            this.m_operation = operation;
+        }
+
+        public void GetResult(DirectoryEntry rootEntry, DirectoryEntry currentEntry, List<DirectoryEntry> response)
+        {
+            if (rootEntry == null)
+                throw new ArgumentNullException("rootEntry");
+            if (currentEntry == null)
+                throw new ArgumentNullException("currentEntry");
+            if (response == null)
+                throw new ArgumentNullException("response");
+
+            using (DirectorySearcher searcher = new DirectorySearcher(rootEntry))
+            {
+                String strStart = "(";
+                String strOperation = "";
+                String strEnd = ")";
+
+                switch (this.m_operation)
+                {
+                    case DirectoryQueryOperation.Equal:
+                        strOperation = "=";
+                        break;
+
+                    case DirectoryQueryOperation.NotEqual:
+                        strStart = "(!(";
+                        strOperation = "=";
+                        strEnd = "))";
+                        break;
+
+                    default:
+                        System.Diagnostics.Debug.Assert(false);
+                        break;
+                }
+
+                searcher.Filter = strStart + this.m_name + strOperation + this.m_value + strEnd;
+
+                foreach (SearchResult result in searcher.FindAll())
+                {
+                    response.Add(result.GetDirectoryEntry());
+                }
+            }
+        }
+    }
+
+}