/// <summary>
/// Creates a property setter method with Lambda Expressions.
/// </summary>
/// <param name="propertyInfo">The property info.</param>
private static Action <T, object> CreatePropertySetter(System.Reflection.PropertyInfo propertyInfo)
{
// check cache to avoid creating another method
string cacheKey = "setter." + propertyInfo.GetHashCode();
object cache;
if (internalCache.TryGetValue(cacheKey, out cache))
{
return((Action <T, object>)cache);
}
// create method
var name = propertyInfo.Name;
var propType = propertyInfo.PropertyType;
var sourceType = Expression.Parameter(typeof(T));
var argument = Expression.Parameter(typeof(object), name);
var propExp = Expression.Property(sourceType, name);
var castToObject = Expression.Convert(argument, propType);
var method = Expression.Lambda <Action <T, object> > (Expression.Assign(propExp, castToObject), sourceType, argument).Compile();
// add to cache and return
internalCache.TryAdd(cacheKey, method);
return(method);
}
//static object setLock=new object();
/// <summary>
/// Fast setter. aprox 8x faster than simple Reflection
/// </summary>
/// <param name="a"></param>
/// <param name="value"></param>
public static void SetValueFast(this PropertyInfo p, object a, object value)
{
Setter inv = null;
if (_cache == null)
{
_cache = new ConcurrentDictionary <int, Setter>();
}
var key = p.GetHashCode();
if (!_cache.TryGetValue(key, out inv))
{
var mi = p.GetSetMethod();
DynamicMethod met = new DynamicMethod("set_" + key, typeof(void), new[] { typeof(object), typeof(object) }, typeof(ObjectExtend).Module, true);
var il = met.GetILGenerator();
il.Emit(OpCodes.Ldarg_0); //instance
il.Emit(OpCodes.Ldarg_1); //value
if (p.PropertyType.IsValueType)
{
il.Emit(OpCodes.Unbox_Any, p.PropertyType);
}
il.Emit(OpCodes.Call, mi);
il.Emit(OpCodes.Ret);
inv = (Setter)met.CreateDelegate(typeof(Setter));
_cache.TryAdd(key, inv);
}
inv(a, value);
}
/// <summary>
/// Fast getter. aprox 5x faster than simple Reflection, aprox. 10x slower than manual get
/// </summary>
/// <param name="a"></param>
public static object GetValueFast(this PropertyInfo p, object a)
{
Func <object, object> inv = null;
if (_cacheGet == null)
{
_cacheGet = new ConcurrentDictionary <int, Func <object, object> >();
}
var key = p.GetHashCode();
if (!_cacheGet.TryGetValue(key, out inv))
{
var mi = p.GetGetMethod();
DynamicMethod met = new DynamicMethod("get_" + key, typeof(object), new[] { typeof(object) }, typeof(ObjectExtend).Module, true);
var il = met.GetILGenerator();
il.Emit(OpCodes.Ldarg_0); //instance
il.Emit(OpCodes.Call, mi); //call getter
if (p.PropertyType.IsValueType)
{
il.Emit(OpCodes.Box, p.PropertyType);
}
il.Emit(OpCodes.Ret);
inv = (Func <object, object>)met.CreateDelegate(Expression.GetFuncType(typeof(object), typeof(object)));
_cacheGet.TryAdd(key, inv);
}
return(inv(a));
}
static StackObject *GetHashCode_26(ILIntepreter __intp, StackObject *__esp, IList <object> __mStack, CLRMethod __method, bool isNewObj)
{
ILRuntime.Runtime.Enviorment.AppDomain __domain = __intp.AppDomain;
StackObject *ptr_of_this_method;
StackObject *__ret = ILIntepreter.Minus(__esp, 1);
ptr_of_this_method = ILIntepreter.Minus(__esp, 1);
System.Reflection.PropertyInfo instance_of_this_method = (System.Reflection.PropertyInfo) typeof(System.Reflection.PropertyInfo).CheckCLRTypes(StackObject.ToObject(ptr_of_this_method, __domain, __mStack));
__intp.Free(ptr_of_this_method);
var result_of_this_method = instance_of_this_method.GetHashCode();
__ret->ObjectType = ObjectTypes.Integer;
__ret->Value = result_of_this_method;
return(__ret + 1);
}
/// <summary>
/// Creates a property getter method with Lambda Expressions.
/// </summary>
/// <param name="propertyInfo">The property info.</param>
private static Func <T, object> CreatePropertyGetter(System.Reflection.PropertyInfo propertyInfo)
{
// check cache to avoid creating another method
string cacheKey = "getter." + propertyInfo.GetHashCode();
object cache;
if (internalCache.TryGetValue(cacheKey, out cache))
{
return((Func <T, object>)cache);
}
// create method
var name = propertyInfo.Name;
var source = Expression.Parameter(typeof(T));
var method = Expression.Lambda <Func <T, object> >(Expression.Convert(Expression.Property(source, name), typeof(object)), source).Compile();
// add to cache and return
internalCache.TryAdd(cacheKey, method);
return(method);
}
GetCachedSetPropertyHandlerDelegate(Type type, PropertyInfo propertyInfo)
{
int intCachedKey = propertyInfo.GetHashCode();//type.ToString() + "|P|" + propertyInfo.Name;
if (_propertySetDelegates.ContainsKey(intCachedKey))
return (SetHandler)_propertySetDelegates[intCachedKey];
SetHandler returnValue = CreateSetHandler(type, propertyInfo);
lock (_propertySetDelegates)
{
_propertySetDelegates[intCachedKey] = returnValue;
}
return returnValue;
}
/// <summary>
/// Implement a property with getter/setter that relies on a private backup field.
/// This is useful only to provide a temporary implementation of abstract properties that would be generated in a second time (this does not
/// provide more than auto implemented properties available in C# 3.0 and later.
/// </summary>
/// <param name="tB">The <see cref="TypeBuilder"/> for the new type.</param>
/// <param name="property">The property to implement.</param>
/// <param name="isVirtual">Defaults to false: the method is sealed. True to keep the method virtual. </param>
/// <returns>The <see cref="PropertyBuilder"/> to enable, for instance, creation of custom attributes on the property.</returns>
public static PropertyBuilder ImplementStubProperty( TypeBuilder tB, PropertyInfo property, bool isVirtual = false )
{
if( tB == null ) throw new ArgumentNullException( "tB" );
if( property == null ) throw new ArgumentNullException( "property" );
FieldBuilder backField = tB.DefineField( "_" + property.Name + property.GetHashCode(), property.PropertyType, FieldAttributes.Private );
MethodInfo getMethod = property.GetMethod;
MethodBuilder mGet = null;
if( getMethod != null )
{
MethodAttributes mA = getMethod.Attributes & ~(MethodAttributes.Abstract | MethodAttributes.VtableLayoutMask);
if( isVirtual ) mA |= MethodAttributes.Virtual;
mGet = tB.DefineMethod( getMethod.Name, mA, property.PropertyType, Type.EmptyTypes );
ILGenerator g = mGet.GetILGenerator();
g.LdArg( 0 );
g.Emit( OpCodes.Ldfld, backField );
g.Emit( OpCodes.Ret );
}
MethodInfo setMethod = property.SetMethod;
MethodBuilder mSet = null;
if( setMethod != null )
{
MethodAttributes mA = setMethod.Attributes & ~(MethodAttributes.Abstract | MethodAttributes.VtableLayoutMask);
if( isVirtual ) mA |= MethodAttributes.Virtual;
mSet = tB.DefineMethod( setMethod.Name, mA, typeof( void ), new[] { property.PropertyType } );
ILGenerator g = mSet.GetILGenerator();
g.LdArg( 0 );
g.LdArg( 1 );
g.Emit( OpCodes.Stfld, backField );
g.Emit( OpCodes.Ret );
}
PropertyBuilder p = tB.DefineProperty( property.Name, property.Attributes, property.PropertyType, Type.EmptyTypes );
if( mGet != null ) p.SetGetMethod( mGet );
if( mSet != null ) p.SetSetMethod( mSet );
return p;
}
