/// <summary>
/// Adds a GetServiceHashCode method to a target type.
/// </summary>
/// <param name="targetType">The target type.</param>
/// <param name="shouldBeVisible">A boolean flag that indicates whether or not the method should be public.</param>
/// <returns>The GetServiceHashCode method.</returns>
public MethodDefinition AddGetServiceHashMethodTo(TypeDefinition targetType, bool shouldBeVisible)
{
var options = new MethodBuilderOptions();
DefineOptions(targetType, shouldBeVisible, options);
var module = targetType.Module;
var methodBuilder = new MethodBuilder();
var method = methodBuilder.CreateMethod(options);
var body = method.Body;
var il = body.GetILProcessor ();
var getHashCodeMethod = module.ImportMethod<object>("GetHashCode");
var hashVariable = EmitGetServiceTypeHashCode(module, body, il, getHashCodeMethod);
// Calculate the hash code for the service name
// if it isn't null
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Ceq);
var skipNameHash = il.Create(OpCodes.Nop);
il.Emit(OpCodes.Brtrue, skipNameHash);
EmitGetServiceNameHashCode(il, getHashCodeMethod, hashVariable);
il.Append(skipNameHash);
il.Emit(OpCodes.Ldloc, hashVariable);
il.Emit(OpCodes.Ret);
return method;
}
/// <summary>
/// Adds a method override for a particular <paramref name="targetMethod"/>.
/// </summary>
/// <param name="targetMethod">The target method.</param>
/// <param name="hostType">The type that will host the new method.</param>
/// <returns>The overridden method.</returns>
public MethodDefinition AddOverrideFor(MethodInfo targetMethod, TypeDefinition hostType)
{
var module = hostType.Module;
var options = new MethodBuilderOptions();
options.IsPublic = true;
options.MethodName = targetMethod.Name;
var parameterTypes = new List<System.Type>();
foreach (var param in targetMethod.GetParameters())
{
parameterTypes.Add(param.ParameterType);
}
options.HostType = hostType;
options.SetMethodParameters(parameterTypes.ToArray());
options.ReturnType = targetMethod.ReturnType;
var builder = new MethodBuilder();
return builder.CreateMethod(options);
}