pgsqlclient-checkins

[Carlos G. Á. <car...@us...>]

Update of /cvsroot/pgsqlclient/pgsqlclient_10/source/PostgreSql/Data/Design/ParameterCollection
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv7345/Data/Design/ParameterCollection

Added Files:
	PgParameterCollectionEditor.cs PgParameterConverter.cs 
Log Message:
Started the reorganization of the CVS module

--- NEW FILE: PgParameterConverter.cs ---
/* PgSqlClient - ADO.NET Data Provider for PostgreSQL 7.4+
 * Copyright (c) 2003-2005 Carlos Guzman Alvarez
 * 
 * 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 2.1 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

using System;
using System.Data;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;

namespace PostgreSql.Data.Design
{
	internal class PgParameterConverter : TypeConverter
    {
        #region · Methods ·

        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) 
		{
			if (destinationType == typeof(InstanceDescriptor)) 
			{
				return true;
			}

			return base.CanConvertTo(context, destinationType);
		}

		public override object ConvertTo(ITypeDescriptorContext context, 
			CultureInfo culture, object value, Type destinationType) 
		{
			if (destinationType == typeof(InstanceDescriptor) && 
				value is PgParameter) 
			{
				PgParameter param = (PgParameter)value;

				ConstructorInfo ctor = typeof(PgParameter).GetConstructor(
					new Type[] {typeof(string)	, typeof(PgDbType), 
								   typeof(int)	, typeof(ParameterDirection),
								   typeof(bool)	, typeof(byte),
								   typeof(byte)	, typeof(string),
								   typeof(DataRowVersion), typeof(object)
							   });
				
				if (ctor != null)
				{
					return new InstanceDescriptor(ctor, 
						new object[] {
										 param.ParameterName	, param.PgDbType,
										 param.Size				, param.Direction,
										 param.IsNullable		, param.Precision,
										 param.Scale			, param.SourceColumn,
										 param.SourceVersion	, param.Value
									 });
				}
			}

			return base.ConvertTo(context, culture, value, destinationType);      
		}

        #endregion
	}
}

--- NEW FILE: PgParameterCollectionEditor.cs ---
/* PgSqlClient - ADO.NET Data Provider for PostgreSQL 7.4+
 * Copyright (c) 2003-2005 Carlos Guzman Alvarez
 * 
 * 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 2.1 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

using System;
using System.Data;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Globalization;
using System.Reflection;

namespace PostgreSql.Data.Design
{
	internal class PgParameterCollectionEditor : System.ComponentModel.Design.CollectionEditor
    {
        #region · Fields ·
        
        private PgParameterCollection parameters;

        #endregion

        #region · Methods ·

        public PgParameterCollectionEditor(Type type) : base(type)
		{
			parameters = null;
		}

		protected override object CreateInstance(Type type)
		{
			PgParameter parameter = (PgParameter)base.CreateInstance(type);
			
			parameter.ParameterName = this.GenerateParameterName("Parameter");

			return parameter;
		}

		public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
		{
			this.parameters = (PgParameterCollection)value;
			return base.EditValue(context, provider, value);
		}

        #endregion

        #region · Private Methods ·

        private string GenerateParameterName(string prefix)
		{
			string	parameterName = String.Empty;
			int		index	= parameters.Count + 1;
			bool	valid	= false;
			
			while (!valid)
			{
				parameterName = prefix + index.ToString();
				if (parameters.IndexOf(parameterName) == -1)
				{
					valid = true;
				}
				index++;
			}

			return parameterName;
		}

        #endregion
	}
}