add lockresult operator

Author: unknown

src/NHibernate/Linq/ReWriters/ResultOperatorRewriter.cs

@@ -67,6 +67,7 @@ private class ResultOperatorExpressionRewriter : ExpressionTreeVisitor
 					typeof(OfTypeResultOperator),
 					typeof(CacheableResultOperator),
 					typeof(TimeoutResultOperator),
+                    typeof (LockResultOperator),
 					typeof(CastResultOperator), // see ProcessCast class
 				};
 

src/NHibernate/Linq/Visitors/ResultOperatorProcessors/ProcessLock.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace NHibernate.Linq.Visitors.ResultOperatorProcessors
+{
+    internal class ProcessLock : IResultOperatorProcessor<LockResultOperator>
+    {
+        public void Process(LockResultOperator resultOperator, QueryModelVisitor queryModelVisitor, IntermediateHqlTree tree)
+        {
+			tree.AddAdditionalCriteria((q, p) => q.SetLockMode(queryModelVisitor.Model.MainFromClause.ItemName, (LockMode)resultOperator.LockMode.Value));
+        }
+    }
+}