|
using System;
using Pfz.RuntimeExtensionManagement.RuntimeExtensions.Support;
namespace Pfz.RuntimeExtensionManagement.RuntimeExtensions.Searchers.Default
{
/// <summary>
/// This is the "default" is read-only verifier.
/// If the type is immutable, it returns true. If the type is not immutable,
/// it returns false.
/// </summary>
public sealed class IsReadOnlyVerifierDefaultSearcher:
IsReadOnlyVerifierSearcher
{
private static readonly IsReadOnlyVerifierDefaultSearcher _instance = new IsReadOnlyVerifierDefaultSearcher();
/// <summary>
/// Gets the singleton instance of this class.
/// </summary>
public static IsReadOnlyVerifierDefaultSearcher Instance
{
get
{
return _instance;
}
}
private IsReadOnlyVerifierDefaultSearcher()
{
}
/// <summary>
/// Returns int.MinValue thousands.
/// </summary>
public override int DefaultPriority
{
get
{
return int.MinValue;
}
}
/// <summary>
/// Tries to return a verifier that uses the immutable flag of the type
/// to always return true or false.
/// </summary>
internal protected override void Search(RuntimeExtensionSearchArgs<IIsReadOnlyVerifier> args)
{
var manager = RuntimeExtensionManager<IsImmutable>.GetLocalInstance();
var type = args.Item.GetType();
var isImmutable = manager.TryGet(type);
args.SetResult(_Create(type, isImmutable != null), true);
}
private static IIsReadOnlyVerifier _Create(Type type, bool isReadonly)
{
var verifierType = typeof(_DefaultIsReadOnlyVerifier<>).MakeGenericType(type);
var constructor = verifierType.GetConstructors()[0];
var result = constructor.Invoke(new object[] { isReadonly });
return (IIsReadOnlyVerifier)result;
}
}
internal sealed class _DefaultIsReadOnlyVerifier<T>:
IIsReadOnlyVerifier<T>
{
private readonly bool _isReadOnly;
public _DefaultIsReadOnlyVerifier(bool isReadOnly)
{
_isReadOnly = isReadOnly;
}
public bool IsReadOnly(T instance)
{
return _isReadOnly;
}
public bool IsReadOnly(object instance)
{
return _isReadOnly;
}
public Type InstanceType
{
get
{
return typeof(T);
}
}
}
}
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
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).