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143 lines
7.2 KiB
143 lines
7.2 KiB
#nullable enable
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using IPA.Config.Data;
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using System;
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namespace IPA.Config.Stores.Converters
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{
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/// <summary>
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/// A <see cref="ValueConverter{T}"/> for objects normally serialized to config via <see cref="GeneratedStore.Generated{T}(Config, bool)"/>.
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/// </summary>
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/// <typeparam name="T">the same type parameter that would be passed into <see cref="GeneratedStore.Generated{T}(Config, bool)"/></typeparam>
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/// <seealso cref="GeneratedStore.Generated{T}(Config, bool)"/>
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public class CustomObjectConverter<T> : ValueConverter<T> where T : class
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{
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private interface IImpl
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{
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T? FromValue(Value? value, object parent);
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Value? ToValue(T? obj, object parent);
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}
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private class Impl<U> : IImpl where U : class, GeneratedStoreImpl.IGeneratedStore<T>, T
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{
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private static readonly GeneratedStoreImpl.GeneratedStoreCreator creator = GeneratedStoreImpl.GetCreator(typeof(T));
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private static U Create(GeneratedStoreImpl.IGeneratedStore? parent)
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=> (U)creator(parent);
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public T? FromValue(Value? value, object parent)
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{ // lots of casting here, but it works i promise (probably) (parent can be a non-IGeneratedStore, however it won't necessarily behave then)
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if (value is null) return null;
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var obj = Create(parent as GeneratedStoreImpl.IGeneratedStore);
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obj.Deserialize(value);
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return obj;
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}
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public Value? ToValue(T? obj, object parent)
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{
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if (obj is null) return null;
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if (obj is GeneratedStoreImpl.IGeneratedStore store)
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return store.Serialize();
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else
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{
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var newObj = Create(null);
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newObj.CopyFrom(obj, false); // don't use lock because it won't be used
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return newObj.Serialize();
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}
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}
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}
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private static readonly IImpl impl = (IImpl)Activator.CreateInstance(
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typeof(Impl<>).MakeGenericType(typeof(T), GeneratedStoreImpl.GetGeneratedType(typeof(T))));
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/// <summary>
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/// Deserializes <paramref name="value"/> into a <typeparamref name="T"/> with the given <paramref name="parent"/>.
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/// </summary>
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/// <param name="value">the <see cref="Value"/> to deserialize</param>
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/// <param name="parent">the parent object that will own the deserialized value</param>
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/// <returns>the deserialized value</returns>
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/// <seealso cref="ValueConverter{T}.FromValue(Value, object)"/>
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public static T? Deserialize(Value? value, object parent)
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=> impl.FromValue(value, parent);
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/// <summary>
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/// Serializes <paramref name="obj"/> into a <see cref="Value"/> structure, given <paramref name="parent"/>.
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/// </summary>
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/// <param name="obj">the object to serialize</param>
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/// <param name="parent">the parent object that owns <paramref name="obj"/></param>
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/// <returns>the <see cref="Value"/> tree that represents <paramref name="obj"/></returns>
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/// <seealso cref="ValueConverter{T}.ToValue(T, object)"/>
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public static Value? Serialize(T? obj, object parent)
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=> impl.ToValue(obj, parent);
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/// <summary>
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/// Deserializes <paramref name="value"/> into a <typeparamref name="T"/> with the given <paramref name="parent"/>.
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/// </summary>
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/// <param name="value">the <see cref="Value"/> to deserialize</param>
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/// <param name="parent">the parent object that will own the deserialized value</param>
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/// <returns>the deserialized value</returns>
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/// <seealso cref="ValueConverter{T}.FromValue(Value, object)"/>
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public override T? FromValue(Value? value, object parent)
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=> Deserialize(value, parent);
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/// <summary>
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/// Serializes <paramref name="obj"/> into a <see cref="Value"/> structure, given <paramref name="parent"/>.
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/// </summary>
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/// <param name="obj">the object to serialize</param>
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/// <param name="parent">the parent object that owns <paramref name="obj"/></param>
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/// <returns>the <see cref="Value"/> tree that represents <paramref name="obj"/></returns>
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/// <seealso cref="ValueConverter{T}.ToValue(T, object)"/>
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public override Value? ToValue(T? obj, object parent)
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=> Serialize(obj, parent);
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}
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/// <summary>
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/// A <see cref="ValueConverter{T}"/> for custom value types, serialized identically to the reference types serialized with
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/// <see cref="GeneratedStore.Generated{T}(Config, bool)"/>.
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/// </summary>
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/// <typeparam name="T">the type of the value to convert</typeparam>
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public class CustomValueTypeConverter<T> : ValueConverter<T> where T : struct
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{
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private static readonly GeneratedStoreImpl.SerializeObject<T> serialize
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= GeneratedStoreImpl.GetSerializerDelegate<T>();
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private static readonly GeneratedStoreImpl.DeserializeObject<T> deserialize
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= GeneratedStoreImpl.GetDeserializerDelegate<T>();
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/// <summary>
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/// Deserializes <paramref name="value"/> into a <typeparamref name="T"/> with the given <paramref name="parent"/>.
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/// </summary>
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/// <param name="value">the <see cref="Value"/> to deserialize</param>
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/// <param name="parent">the parent object that will own the deserialized value</param>
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/// <returns>the deserialized value</returns>
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/// <seealso cref="ValueConverter{T}.FromValue(Value, object)"/>
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public static T Deserialize(Value? value, object parent)
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=> deserialize(value, parent);
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/// <summary>
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/// Serializes <paramref name="obj"/> into a corresponding <see cref="Value"/> structure.
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/// </summary>
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/// <param name="obj">the object to serialize</param>
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/// <returns>the <see cref="Value"/> tree that represents <paramref name="obj"/></returns>
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/// <seealso cref="ValueConverter{T}.ToValue(T, object)"/>
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public static Value Serialize(T obj)
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=> serialize(obj);
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/// <summary>
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/// Deserializes <paramref name="value"/> into a <typeparamref name="T"/> with the given <paramref name="parent"/>.
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/// </summary>
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/// <param name="value">the <see cref="Value"/> to deserialize</param>
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/// <param name="parent">the parent object that will own the deserialized value</param>
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/// <returns>the deserialized value</returns>
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/// <seealso cref="ValueConverter{T}.FromValue(Value, object)"/>
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public override T FromValue(Value? value, object parent)
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=> Deserialize(value, parent);
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/// <summary>
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/// Serializes <paramref name="obj"/> into a <see cref="Value"/> structure, given <paramref name="parent"/>.
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/// </summary>
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/// <param name="obj">the object to serialize</param>
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/// <param name="parent">the parent object that owns <paramref name="obj"/></param>
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/// <returns>the <see cref="Value"/> tree that represents <paramref name="obj"/></returns>
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/// <seealso cref="ValueConverter{T}.ToValue(T, object)"/>
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public override Value? ToValue(T obj, object parent)
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=> Serialize(obj);
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}
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}
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