protected virtual bool PrepareMember(MemberDescriptorBase member)
{
var memberType = member.Type;
// Remove all SyncRoot from members
if (member is PropertyDescriptor && member.OriginalName == "SyncRoot" &&
(member.DeclaringType.Namespace ?? string.Empty).StartsWith(SystemCollectionsNamespace))
{
return(false);
}
// Process all attributes just once instead of getting them one by one
var attributes = AttributeRegistry.GetAttributes(member.MemberInfo);
YamlStyleAttribute styleAttribute = null;
YamlMemberAttribute memberAttribute = null;
DefaultValueAttribute defaultValueAttribute = null;
foreach (var attribute in attributes)
{
// Member is not displayed if there is a YamlIgnore attribute on it
if (attribute is YamlIgnoreAttribute)
{
return(false);
}
if (attribute is YamlMemberAttribute)
{
memberAttribute = (YamlMemberAttribute)attribute;
continue;
}
if (attribute is DefaultValueAttribute)
{
defaultValueAttribute = (DefaultValueAttribute)attribute;
continue;
}
if (attribute is YamlStyleAttribute)
{
styleAttribute = (YamlStyleAttribute)attribute;
continue;
}
var yamlRemap = attribute as YamlRemapAttribute;
if (yamlRemap != null)
{
if (member.AlternativeNames == null)
{
member.AlternativeNames = new List <string>();
}
if (!string.IsNullOrEmpty(yamlRemap.Name))
{
member.AlternativeNames.Add(yamlRemap.Name);
}
}
}
// If the member has a set, this is a conventional assign method
if (member.HasSet)
{
member.SerializeMemberMode = SerializeMemberMode.Content;
}
else
{
// Else we cannot only assign its content if it is a class
member.SerializeMemberMode = (memberType != typeof(string) && memberType.GetTypeInfo().IsClass) || memberType.GetTypeInfo().IsInterface || type.IsAnonymous() ? SerializeMemberMode.Content : SerializeMemberMode.Never;
}
// If it's a private member, check it has a YamlMemberAttribute on it
if (!member.IsPublic)
{
if (memberAttribute == null)
{
return(false);
}
}
// Gets the style
member.Style = styleAttribute != null ? styleAttribute.Style : YamlStyle.Any;
member.Mask = 1;
// Handle member attribute
if (memberAttribute != null)
{
member.Mask = memberAttribute.Mask;
if (!member.HasSet)
{
if (memberAttribute.SerializeMethod == SerializeMemberMode.Assign ||
(memberType.GetTypeInfo().IsValueType&& member.SerializeMemberMode == SerializeMemberMode.Content))
{
throw new ArgumentException("{0} {1} is not writeable by {2}.".DoFormat(memberType.FullName, member.OriginalName, memberAttribute.SerializeMethod.ToString()));
}
}
if (memberAttribute.SerializeMethod != SerializeMemberMode.Default)
{
member.SerializeMemberMode = memberAttribute.SerializeMethod;
}
member.Order = memberAttribute.Order;
}
if (member.SerializeMemberMode == SerializeMemberMode.Binary)
{
if (!memberType.IsArray)
{
throw new InvalidOperationException("{0} {1} of {2} is not an array. Can not be serialized as binary."
.DoFormat(memberType.FullName, member.OriginalName, type.FullName));
}
if (!memberType.GetElementType().IsPureValueType())
{
throw new InvalidOperationException("{0} is not a pure ValueType. {1} {2} of {3} can not serialize as binary.".DoFormat(memberType.GetElementType(), memberType.FullName, member.OriginalName, type.FullName));
}
}
// If this member cannot be serialized, remove it from the list
if (member.SerializeMemberMode == SerializeMemberMode.Never)
{
return(false);
}
// ShouldSerialize
// YamlSerializeAttribute(Never) => false
// ShouldSerializeSomeProperty => call it
// DefaultValueAttribute(default) => compare to it
// otherwise => true
var shouldSerialize = type.GetMethod("ShouldSerialize" + member.OriginalName, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
if (shouldSerialize != null && shouldSerialize.ReturnType == typeof(bool) && member.ShouldSerialize == null)
{
member.ShouldSerialize = obj => (bool)shouldSerialize.Invoke(obj, EmptyObjectArray);
}
if (defaultValueAttribute != null && member.ShouldSerialize == null && !emitDefaultValues)
{
object defaultValue = defaultValueAttribute.Value;
Type defaultType = defaultValue == null ? null : defaultValue.GetType();
if (defaultType.IsNumeric() && defaultType != memberType)
{
defaultValue = memberType.CastToNumericType(defaultValue);
}
member.ShouldSerialize = obj => !TypeExtensions.AreEqual(defaultValue, member.Get(obj));
}
if (member.ShouldSerialize == null)
{
member.ShouldSerialize = ShouldSerializeDefault;
}
if (memberAttribute != null && !string.IsNullOrEmpty(memberAttribute.Name))
{
member.Name = memberAttribute.Name;
}
else
{
member.Name = NamingConvention.Convert(member.OriginalName);
}
return(true);
}