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using System;
using System.Data;
using System.Reflection;
using Pfz.Databasing.Managers;
namespace Pfz.Databasing.TypeConverters
{
/// <summary>
/// Converts Nullable values.
/// In fact, it only recognizes a nullable type and calls the real
/// type converter (the non-nullable one).
/// </summary>
public sealed class NullableConverter:
BaseTypeConverter
{
/// <summary>
/// Does not parses sub-types.
/// </summary>
public override bool CanParseSubTypes
{
get
{
return false;
}
}
/// <summary>
/// Nullable generic type.
/// </summary>
public override Type CSharpType
{
get
{
return typeof(Nullable<>);
}
}
/// <summary>
/// Sets the db type of the real type.
/// </summary>
public override void InitializeParameter(IDatabaseConnection connection, IDbDataParameter parameter, Type csharpType, PropertyInfo propertyInfo)
{
if (csharpType == null)
throw new ArgumentNullException("csharpType");
var manager = LocalDatabaseManager.Value;
Type realType = csharpType.GetGenericArguments()[0];
manager.GetTypeConverter(realType).InitializeParameter(connection, parameter, realType, propertyInfo);
}
/// <summary>
/// Calls the real type converter.
/// </summary>
public override object ConvertFromDatabase(IDatabaseConnection connection, PropertyInfo propertyInfo, object databaseValue)
{
if (propertyInfo == null)
throw new ArgumentNullException("propertyInfo");
var manager = LocalDatabaseManager.Value;
Type realType = propertyInfo.PropertyType.GetGenericArguments()[0];
return manager.GetTypeConverter(realType).ConvertFromDatabase(connection, propertyInfo, databaseValue);
}
/// <summary>
/// Calls the real type converter.
/// </summary>
public override object ConvertToDatabase(IDatabaseConnection connection, PropertyInfo propertyInfo, object value)
{
if (propertyInfo == null)
throw new ArgumentNullException("propertyInfo");
var manager = LocalDatabaseManager.Value;
Type realType = propertyInfo.PropertyType.GetGenericArguments()[0];
return manager.GetTypeConverter(realType).ConvertToDatabase(connection, propertyInfo, value);
}
/// <summary>
/// Returns the type from the real type (as this it is a nullable of something).
/// </summary>
public override string GetCreateSqlTypeString(IDatabaseConnection connection, PropertyInfo propertyInfo)
{
if (propertyInfo == null)
throw new ArgumentNullException("propertyInfo");
var manager = LocalDatabaseManager.Value;
Type realType = propertyInfo.PropertyType.GetGenericArguments()[0];
return manager.GetTypeConverter(realType).GetCreateSqlTypeString(connection, propertyInfo);
}
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).