private static Func <object[], object> GetCreator(Type type)
{
Func <object> defaultConstructor = (ReflectionUtils.HasDefaultConstructor(type, false))
? ReflectionDelegateFactory.CreateDefaultConstructor <object>(type)
: null;
return((parameters) =>
{
try
{
if (parameters != null)
{
Type[] paramTypes = parameters.Select(param => param.GetType()).ToArray();
ConstructorInfo parameterizedConstructorInfo = type.GetConstructor(paramTypes);
if (null != parameterizedConstructorInfo)
{
ObjectConstructor <object> parameterizedConstructor = ReflectionDelegateFactory.CreateParameterizedConstructor(parameterizedConstructorInfo);
return parameterizedConstructor(parameters);
}
else
{
throw new JsonException("No matching parameterized constructor found for '{0}'.".FormatWith(CultureInfo.InvariantCulture, type));
}
}
if (defaultConstructor == null)
{
throw new JsonException("No parameterless constructor defined for '{0}'.".FormatWith(CultureInfo.InvariantCulture, type));
}
return defaultConstructor();
}
catch (Exception ex)
{
throw new JsonException("Error creating '{0}'.".FormatWith(CultureInfo.InvariantCulture, type), ex);
}
});
}
public static ReflectionObject Create(Type t, MethodBase creator, params string[] memberNames)
{
ReflectionDelegateFactory delegateFactory = JsonTypeReflector.ReflectionDelegateFactory;
ObjectConstructor <object> creatorConstructor = null;
if (creator != null)
{
creatorConstructor = delegateFactory.CreateParameterizedConstructor(creator);
}
else
{
if (ReflectionUtils.HasDefaultConstructor(t, false))
{
Func <object> ctor = delegateFactory.CreateDefaultConstructor <object>(t);
creatorConstructor = args => ctor();
}
}
ReflectionObject d = new ReflectionObject(creatorConstructor);
foreach (string memberName in memberNames)
{
MemberInfo[] members = t.GetMember(memberName, BindingFlags.Instance | BindingFlags.Public);
if (members.Length != 1)
{
throw new ArgumentException("Expected a single member with the name '{0}'.".FormatWith(CultureInfo.InvariantCulture, memberName));
}
MemberInfo member = members.Single();
ReflectionMember reflectionMember = new ReflectionMember();
switch (member.MemberType())
{
case MemberTypes.Field:
case MemberTypes.Property:
if (ReflectionUtils.CanReadMemberValue(member, false))
{
reflectionMember.Getter = delegateFactory.CreateGet <object>(member);
}
if (ReflectionUtils.CanSetMemberValue(member, false, false))
{
reflectionMember.Setter = delegateFactory.CreateSet <object>(member);
}
break;
case MemberTypes.Method:
MethodInfo method = (MethodInfo)member;
if (method.IsPublic)
{
ParameterInfo[] parameters = method.GetParameters();
if (parameters.Length == 0 && method.ReturnType != typeof(void))
{
MethodCall <object, object> call = delegateFactory.CreateMethodCall <object>(method);
reflectionMember.Getter = target => call(target);
}
else if (parameters.Length == 1 && method.ReturnType == typeof(void))
{
MethodCall <object, object> call = delegateFactory.CreateMethodCall <object>(method);
reflectionMember.Setter = (target, arg) => call(target, arg);
}
}
break;
default:
throw new ArgumentException("Unexpected member type '{0}' for member '{1}'.".FormatWith(CultureInfo.InvariantCulture, member.MemberType(), member.Name));
}
if (ReflectionUtils.CanReadMemberValue(member, false))
{
reflectionMember.Getter = delegateFactory.CreateGet <object>(member);
}
if (ReflectionUtils.CanSetMemberValue(member, false, false))
{
reflectionMember.Setter = delegateFactory.CreateSet <object>(member);
}
reflectionMember.MemberType = ReflectionUtils.GetMemberUnderlyingType(member);
d.Members[memberName] = reflectionMember;
}
return(d);
}