/// <summary>
/// Emits the service method call.
/// </summary>
/// <param name="methodIL">The il emitter.</param>
/// <param name="serviceMethod">The service method.</param>
private void EmitServiceMethodCall(
IEmitter methodIL,
MethodInfo serviceMethod)
{
ILocal proxyArguments = null;
if (this.methodParmAttrs.Any() == true)
{
// Load the proxy method arguments into an array.
methodIL
.DeclareLocal <object[]>("proxyArguments", out proxyArguments)
.Array(
typeof(object),
proxyArguments,
this.methodParmTypes.Length,
(i) =>
{
methodIL
.LdArg(i + 1)
.Conv(this.methodParmTypes[i], typeof(object), false);
});
methodIL.EmitWriteLine("------------------- PROXY ARGS --------------------");
methodIL.EmitWriteLine(proxyArguments);
// Load the service object.
methodIL
.LdArg0()
.LdFld(this.context.BaseObjectField);
// Iterate through service parameters
for (int i = 0; i < this.methodParms.Length; i++)
{
var fromModelAttr = this.methodParms[i].GetCustomAttribute <FromParameterAttribute>();
if (fromModelAttr != null)
{
if (string.IsNullOrEmpty(fromModelAttr.PropertyName) == false)
{
methodIL
.EmitLoadArrayElement(proxyArguments, this.methodParmIndex[fromModelAttr.ParameterName])
.LdStr(fromModelAttr.PropertyName)
.Call(BinderGetValueMethod.MakeGenericMethod(this.methodParms[i].ParameterType));
}
else
{
int index = this.methodParmIndex[fromModelAttr.ParameterName];
methodIL
.EmitLoadArrayElement(proxyArguments, index)
.EmitConverter(this.methodParmTypes[index], this.methodParms[i].ParameterType);
}
continue;
}
var fromHeaderAttr = this.methodParms[i].GetCustomAttribute <FromHeaderAttribute>();
if (fromHeaderAttr != null)
{
methodIL
.LdArg0()
.CallVirt(RequestPropertyInfo.GetGetMethod())
.CallVirt(HeadersPropertyInfo.GetGetMethod())
.LdStr(fromHeaderAttr.Name)
.CallVirt(ItemPropertyInfo.GetGetMethod());
continue;
}
methodIL.LdArg(i + 1);
}
// Call the service method
methodIL
.CallVirt(serviceMethod);
}
else
{
// Load the base object and method parameters then call the service method.
methodIL
.LdArg0()
.LdFld(this.context.BaseObjectField)
.EmitLoadParameters(this.methodParms)
.CallVirt(serviceMethod);
}
}
/// <summary>
/// Emits IL to call the set method of a property.
/// </summary>
/// <param name="emitter">The <see cref="IEmitter"/> to use.</param>
/// <param name="propertyName">The property name.</param>
/// <param name="propertyType">The property type.</param>
/// <returns></returns>
public static IEmitter SetProperty(this IEmitter emitter, string propertyName, Type propertyType)
{
var setMethod = propertyType.GetProperty(propertyName).GetSetMethod();
return emitter
.CallVirt(setMethod);
}
/// <summary>
/// Emits IL to call the 'ToString' method on the object on the top of the evaluation stack.
/// </summary>
/// <param name="emitter">THe <see cref="IEmitter"/> to use.</param>
public static IEmitter EmitToString(this IEmitter emitter)
{
MethodInfo toStringMethod = typeof(object).GetMethod("ToString", Type.EmptyTypes);
return(emitter.CallVirt(toStringMethod));
}
/// <summary>
/// Emits IL to load the contents of a property onto the evaluation stack.
/// </summary>
/// <param name="emitter">The <see cref="IEmitter"/> to use.</param>
/// <param name="propertyName">The property name.</param>
/// <param name="propertyType">The property type.</param>
/// <returns>The <see cref="IEmitter"/>.</returns>
public static IEmitter GetProperty(this IEmitter emitter, string propertyName, Type propertyType)
{
MethodInfo getMethod = propertyType.GetProperty(propertyName).GetGetMethod();
return emitter
.CallVirt(getMethod);
}
