--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Mapping/MapRelationBase.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,58 @@
+using System;
+
+namespace BLToolkit.Mapping
+{
+	public class MapRelationBase
+	{
+		public MapRelationBase(
+			Type         slave,
+			MapIndex     slaveIndex,
+			MapIndex     masterIndex,
+			string       containerName)
+		{
+			if (slave == null)
+				throw new ArgumentNullException("slave");
+
+			if (masterIndex.Fields.Length == 0)
+				throw new MappingException("Master index length can not be 0.");
+
+			if ( slaveIndex.Fields.Length == 0)
+				throw new MappingException("Slave index length can not be 0.");
+
+			if (masterIndex.Fields.Length != slaveIndex.Fields.Length)
+				throw new MappingException("Master and slave indexes do not match.");
+
+			if (string.IsNullOrEmpty(containerName))
+				throw new MappingException("Master container field name is wrong.");
+			
+			_slave           = slave;
+			_masterIndex     = masterIndex;
+			_slaveIndex      = slaveIndex;
+			_containerName   = containerName;
+		}
+
+		private readonly MapIndex _masterIndex;
+		public           MapIndex  MasterIndex
+		{
+			get { return _masterIndex; }
+		}
+
+		private readonly MapIndex _slaveIndex;
+		public           MapIndex  SlaveIndex
+		{
+			get { return _slaveIndex; }
+		}
+
+		private readonly string _containerName;
+		public           string  ContainerName
+		{
+			get { return _containerName; }
+		}
+
+		private readonly Type _slave;
+		public           Type  Slave
+		{
+			get { return _slave; }
+		}
+	}
+}