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121 lines
4.9 KiB
121 lines
4.9 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace IPA.Config.Stores.Attributes
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{
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/// <summary>
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/// Causes a field or property in an object being wrapped by <see cref="GeneratedExtension.Generated{T}(Config, bool)"/> to be
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/// ignored during serialization and deserialization.
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/// </summary>
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[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
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public sealed class IgnoreAttribute : Attribute { }
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/// <summary>
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/// Indicates that a field or property in an object being wrapped by <see cref="GeneratedExtension.Generated{T}(Config, bool)"/>
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/// that would otherwise be nullable (i.e. a reference type or a <see cref="Nullable{T}"/> type) should never be null, and the
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/// member will be ignored if the deserialized value is <see langword="null"/>.
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/// </summary>
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[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
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public sealed class NonNullableAttribute : Attribute { }
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/// <summary>
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/// Indicates that a given field or property in an object being wrapped by <see cref="GeneratedExtension.Generated{T}(Config, bool)"/>
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/// should be serialized and deserialized using the provided converter instead of the default mechanism.
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/// </summary>
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[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
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public sealed class UseConverterAttribute : Attribute
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{
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/// <summary>
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/// Gets the type of the converter to use.
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/// </summary>
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public Type ConverterType { get; }
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/// <summary>
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/// Gets the target type of the converter if it is avaliable at instantiation time, otherwise
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/// <see langword="null"/>.
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/// </summary>
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public Type ConverterTargetType { get; }
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/// <summary>
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/// Gets whether or not this converter is a generic <see cref="ValueConverter{T}"/>.
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/// </summary>
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public bool IsGenericConverter => ConverterTargetType != null;
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/// <summary>
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/// Creates a new <see cref="UseConverterAttribute"/> with a given <see cref="ConverterType"/>.
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/// </summary>
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/// <param name="converterType">the type to assign to <see cref="ConverterType"/></param>
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public UseConverterAttribute(Type converterType)
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{
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ConverterType = converterType;
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var baseT = ConverterType.BaseType;
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while (baseT != null && baseT != typeof(object) &&
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(!baseT.IsGenericType || baseT.GetGenericTypeDefinition() != typeof(ValueConverter<>)))
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baseT = baseT.BaseType;
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if (baseT == typeof(object)) ConverterTargetType = null;
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else ConverterTargetType = baseT.GetGenericArguments()[0];
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var implInterface = ConverterType.GetInterfaces().Contains(typeof(IValueConverter));
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if (ConverterTargetType == null && !implInterface) throw new ArgumentException("Type is not a value converter!");
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}
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}
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/// <summary>
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/// Specifies a name for the serialized field or property in an object being wrapped by
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/// <see cref="GeneratedExtension.Generated{T}(Config, bool)"/> that is different from the member name itself.
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/// </summary>
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/// <example>
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/// <para>
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/// When serializing the following object, we might get the JSON that follows.
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/// <code>
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/// public class PluginConfig
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/// {
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/// public virtual bool BooleanField { get; set; } = true;
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/// }
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/// </code>
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/// <code>
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/// {
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/// "BooleanField": true
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/// }
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/// </code>
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/// </para>
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/// <para>
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/// However, if we were to add a <see cref="SerializedNameAttribute"/> to that field, we would get the following.
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/// <code>
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/// public class PluginConfig
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/// {
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/// [SerializedName("bool")]
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/// public virtual bool BooleanField { get; set; } = true;
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/// }
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/// </code>
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/// <code>
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/// {
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/// "bool": true
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/// }
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/// </code>
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/// </para>
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/// </example>
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[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
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public sealed class SerializedNameAttribute : Attribute
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{
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/// <summary>
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/// Gets the name to replace the member name with.
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/// </summary>
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public string Name { get; private set; }
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/// <summary>
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/// Creates a new <see cref="SerializedNameAttribute"/> with the given <see cref="Name"/>.
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/// </summary>
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/// <param name="name">the value to assign to <see cref="Name"/></param>
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public SerializedNameAttribute(string name)
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{
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Name = name;
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}
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}
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}
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