From 2a1cd4fda8a4a8e649910d16b4dfa1ce7ae63543 Mon Sep 17 00:00:00 2001 From: chai <215380520@qq.com> Date: Fri, 12 May 2023 09:24:40 +0800 Subject: *misc --- .../src/CsvHelper/ObjectResolver.cs | 143 +++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/ObjectResolver.cs (limited to 'ThirdParty/CsvHelper-master/src/CsvHelper/ObjectResolver.cs') diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/ObjectResolver.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/ObjectResolver.cs new file mode 100644 index 0000000..99a17e0 --- /dev/null +++ b/ThirdParty/CsvHelper-master/src/CsvHelper/ObjectResolver.cs @@ -0,0 +1,143 @@ +// Copyright 2009-2022 Josh Close +// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0. +// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0. +// https://github.com/JoshClose/CsvHelper +using System; + +namespace CsvHelper +{ + /// + /// Creates objects from a given type. + /// + public class ObjectResolver : IObjectResolver + { + private static IObjectResolver current; + private readonly ObjectCreator objectCreator = new ObjectCreator(); + + /// + /// Gets or sets the current resolver. + /// Use an instance of this instead if at all possible. + /// + public static IObjectResolver Current + { + get + { + return current; + } + set + { + if (value == null) + { + throw new InvalidOperationException($"{nameof(IObjectResolver)} cannot be null."); + } + + current = value; + } + } + + /// + /// A value indicating if the resolver's + /// returns false that an object will still be created using + /// CsvHelper's object creation. True to fallback, otherwise false. + /// Default value is true. + /// + public bool UseFallback { get; private set; } + + /// + /// A function that returns a value indicating if the resolver + /// is able to resolve the given type. True if the type can be + /// resolved, otherwise false. + /// + public Func CanResolve { get; private set; } + + /// + /// The function that creates an object from a given type. + /// + public Func ResolveFunction { get; private set; } + + static ObjectResolver() + { + var objectCreator = new ObjectCreator(); + var locker = new object(); + current = new ObjectResolver(type => true, (type, args) => + { + lock (locker) + { + return objectCreator.CreateInstance(type, args); + } + }); + } + + /// + /// Creates an instance of the object resolver using default values. + /// + public ObjectResolver() + { + CanResolve = type => true; + ResolveFunction = ResolveWithObjectCreator; + UseFallback = true; + } + + /// + /// Creates an instance of the object resolver using the given can create function + /// and create function. + /// + /// A function that returns a value indicating if the resolver + /// is able to resolve the given type. True if the type can be + /// resolved, otherwise false. + /// The function that creates an object from a given type. + /// A value indicating if the resolver's + /// returns false that an object will still be created using + /// CsvHelper's object creation. True to fallback, otherwise false. + /// Default value is true. + public ObjectResolver(Func canResolve, Func resolveFunction, bool useFallback = true) + { + CanResolve = canResolve ?? throw new ArgumentNullException(nameof(canResolve)); + ResolveFunction = resolveFunction ?? throw new ArgumentNullException(nameof(resolveFunction)); + UseFallback = useFallback; + } + + /// + /// Creates an object from the given type using the + /// function. If is false, the object will be + /// created using CsvHelper's default object creation. If + /// is false, an exception is thrown. + /// + /// The type to create an instance from. The created object + /// may not be the same type as the given type. + /// Constructor arguments used to create the type. + public object Resolve(Type type, params object[] constructorArgs) + { + if (CanResolve(type)) + { + return ResolveFunction(type, constructorArgs); + } + + if (UseFallback) + { + return objectCreator.CreateInstance(type, constructorArgs); + } + + throw new CsvHelperException($"Type '{type.FullName}' can't be resolved and fallback is turned off."); + } + + /// + /// Creates an object from the given type using the + /// function. If is false, the object will be + /// created using CsvHelper's default object creation. If + /// is false, an exception is thrown. + /// + /// The type to create an instance from. The created object + /// may not be the same type as the given type. + /// Constructor arguments used to create the type. + public T Resolve(params object[] constructorArgs) + { + return (T)Resolve(typeof(T), constructorArgs); + } + + private object ResolveWithObjectCreator(Type type, params object[] args) + { + return objectCreator.CreateInstance(type, args); + } + } +} -- cgit v1.1-26-g67d0