added marr.datamapper source code for easy debugging.

Marr.Data/Parameters/ParameterChainMethods.cs

@@ -0,0 +1,124 @@
+/*  Copyright (C) 2008 - 2011 Jordan Marr
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 3 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library. If not, see <http://www.gnu.org/licenses/>. */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data;
+using System.Data.Common;
+using Marr.Data.Converters;
+
+namespace Marr.Data.Parameters
+{
+    /// <summary>
+    /// This class allows chaining methods to be called for convenience when adding a parameter.
+    /// </summary>
+    public class ParameterChainMethods
+    {
+        /// <summary>
+        /// Creates a new parameter and adds it to the command's Parameters collection.
+        /// </summary>
+        /// <param name="command">The command that the parameter will be added to.</param>
+        /// <param name="parameterName">The parameter name.</param>
+        public ParameterChainMethods(DbCommand command, string parameterName, object value)
+        {
+            Parameter = command.CreateParameter();
+            Parameter.ParameterName = parameterName;
+
+            // Convert null to DBNull.Value
+            if (value == null) 
+                value = DBNull.Value;
+
+            Type valueType = value.GetType();
+
+            // Check for a registered IConverter
+            IConverter converter = MapRepository.Instance.GetConverter(valueType);
+            if (converter != null)
+            {
+                Parameter.Value = converter.ToDB(value);
+            }
+            else
+            {
+                Parameter.Value = value;
+            } 
+
+            //// Determine the correct DbType based on the passed in value type
+            //IDbTypeBuilder typeBuilder = MapRepository.Instance.DbTypeBuilder;
+            //Enum dbType = typeBuilder.GetDbType(valueType);
+
+            //// Set the appropriate DbType property depending on the parameter type
+            //typeBuilder.SetDbType(Parameter, dbType);
+
+            command.Parameters.Add(Parameter);
+        }
+
+        /// <summary>
+        /// Gets a reference to the parameter.
+        /// </summary>
+        public IDbDataParameter Parameter { get; private set; }
+
+        /// <summary>
+        /// Sets the direction of a parameter.
+        /// </summary>
+        /// <param name="direction">Determines the direction of a parameter.</param>
+        /// <returns>Return a ParameterChainMethods object.</returns>
+        public ParameterChainMethods Direction(ParameterDirection direction)
+        {
+            Parameter.Direction = direction;
+            return this;
+        }
+
+        /// <summary>
+        /// Sets the direction of a parameter to 'Output'.
+        /// </summary>
+        /// <returns></returns>
+        public ParameterChainMethods Output()
+        {
+            Parameter.Direction = ParameterDirection.Output;
+            return this;
+        }
+
+        public ParameterChainMethods DBType(DbType dbType)
+        {
+            Parameter.DbType = dbType;
+            return this;
+        }
+
+        public ParameterChainMethods Size(int size)
+        {
+            Parameter.Size = size;
+            return this;
+        }
+
+        public ParameterChainMethods Precision(byte precision)
+        {
+            Parameter.Precision = precision;
+            return this;
+        }
+
+        public ParameterChainMethods Scale(byte scale)
+        {
+            Parameter.Scale = scale;
+            return this;
+        }
+        
+        public ParameterChainMethods Name(string name)
+        {
+            Parameter.ParameterName = name;
+            return this;
+        }
+    }
+}