--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Data/Linq/Builder/PassThroughContext.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,73 @@
+using System;
+using System.Linq.Expressions;
+
+namespace BLToolkit.Data.Linq.Builder
+{
+	using Data.Sql;
+
+	public abstract class PassThroughContext : IBuildContext
+	{
+		protected PassThroughContext(IBuildContext context)
+		{
+			Context = context;
+
+			context.Builder.Contexts.Add(this);
+		}
+
+		public IBuildContext Context { get; set; }
+
+#if DEBUG
+		string IBuildContext._sqlQueryText { get { return Context._sqlQueryText; } }
+#endif
+
+		public virtual ExpressionBuilder Builder    { get { return Context.Builder;    } }
+		public virtual Expression        Expression { get { return Context.Expression; } }
+		public virtual SqlQuery          SqlQuery   { get { return Context.SqlQuery;   } set { Context.SqlQuery = value; } }
+		public virtual IBuildContext     Parent     { get { return Context.Parent;     } set { Context.Parent   = value; } }
+
+		public virtual void BuildQuery<T>(Query<T> query, ParameterExpression queryParameter)
+		{
+			Context.BuildQuery(query, queryParameter);
+		}
+
+		public virtual Expression BuildExpression(Expression expression, int level)
+		{
+			return Context.BuildExpression(expression, level);
+		}
+
+		public virtual SqlInfo[] ConvertToSql(Expression expression, int level, ConvertFlags flags)
+		{
+			return Context.ConvertToSql(expression, level, flags);
+		}
+
+		public virtual SqlInfo[] ConvertToIndex(Expression expression, int level, ConvertFlags flags)
+		{
+			return Context.ConvertToIndex(expression, level, flags);
+		}
+
+		public virtual IsExpressionResult IsExpression(Expression expression, int level, RequestFor requestFlag)
+		{
+			return Context.IsExpression(expression, level, requestFlag);
+		}
+
+		public virtual IBuildContext GetContext(Expression expression, int level, BuildInfo buildInfo)
+		{
+			return Context.GetContext(expression, level, buildInfo);
+		}
+
+		public virtual int ConvertToParentIndex(int index, IBuildContext context)
+		{
+			return Context.ConvertToParentIndex(index, context);
+		}
+
+		public virtual void SetAlias(string alias)
+		{
+			Context.SetAlias(alias);
+		}
+
+		public virtual ISqlExpression GetSubQuery(IBuildContext context)
+		{
+			return Context.GetSubQuery(context);
+		}
+	}
+}