Terraria.ModLoader.Config.ReferenceDefaultsPreservingResolver Class Reference

Custom ContractResolver for facilitating refernce type defaults. The ShouldSerialize code enables unchanged-by-user reference type defaults to properly not serialize. The ValueProvider code helps during deserialization to not More...

Inheritance diagram for Terraria.ModLoader.Config.ReferenceDefaultsPreservingResolver:

Collaboration diagram for Terraria.ModLoader.Config.ReferenceDefaultsPreservingResolver:

Classes
class	NullToDefaultValueProvider
class	ValueProviderDecorator

Protected Member Functions
override IList< JsonProperty >	CreateProperties (Type type, MemberSerialization memberSerialization)

Detailed Description

Custom ContractResolver for facilitating refernce type defaults. The ShouldSerialize code enables unchanged-by-user reference type defaults to properly not serialize. The ValueProvider code helps during deserialization to not

Definition at line 373 of file ConfigManager.cs.

Member Function Documentation

CreateProperties()

override IList< JsonProperty > Terraria.ModLoader.Config.ReferenceDefaultsPreservingResolver.CreateProperties ( Type  type, MemberSerialization  memberSerialization  )

protected

Definition at line 409 of file ConfigManager.cs.

                                                                                                                    {
            IList<JsonProperty> props = base.CreateProperties(type, memberSerialization);
            if (type.IsClass) {
                ConstructorInfo ctor = type.GetConstructor(Type.EmptyTypes);
                if (ctor != null) {
                    object referenceInstance = ctor.Invoke(null);
                    foreach (JsonProperty prop in props.Where(p => p.Readable)) {
                        if (!prop.PropertyType.IsValueType) {
                            var a = type.GetMember(prop.PropertyName); 
                            if (prop.Writable) {
                                if (prop.PropertyType.GetConstructor(Type.EmptyTypes) != null) {
                                    // defaultValueCreator will create new instance, then get the value from a field in that object. Prevents deserialized nulls from sharing with other instances.
                                    Func<object> defaultValueCreator = () => prop.ValueProvider.GetValue(ctor.Invoke(null));
                                    prop.ValueProvider = new NullToDefaultValueProvider(prop.ValueProvider, defaultValueCreator);
                                }
                                else if (prop.PropertyType.IsArray) {
                                    Func<object> defaultValueCreator = () => (prop.ValueProvider.GetValue(referenceInstance) as Array).Clone();
                                    prop.ValueProvider = new NullToDefaultValueProvider(prop.ValueProvider, defaultValueCreator);
                                }
                            }
                            if (prop.ShouldSerialize == null)
                                prop.ShouldSerialize = instance =>
                                {
                                    object val = prop.ValueProvider.GetValue(instance);
                                    object refVal = prop.ValueProvider.GetValue(referenceInstance);
                                    return !ConfigManager.ObjectEquals(val, refVal);
                                };
                        }
                    }
                }
            }
            return props;
        }

References Terraria.ModLoader.Config.ConfigManager.ObjectEquals().

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