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

---
 .../CsvHelper/Expressions/ObjectRecordWriter.cs    | 124 +++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/ObjectRecordWriter.cs

(limited to 'ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/ObjectRecordWriter.cs')

diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/ObjectRecordWriter.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/ObjectRecordWriter.cs
new file mode 100644
index 0000000..08fc79b
--- /dev/null
+++ b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/ObjectRecordWriter.cs
@@ -0,0 +1,124 @@
+// 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 CsvHelper.Configuration;
+using CsvHelper.TypeConversion;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Reflection;
+
+namespace CsvHelper.Expressions
+{
+	/// <summary>
+	/// Writes objects.
+	/// </summary>
+	public class ObjectRecordWriter : RecordWriter
+	{
+		/// <summary>
+		/// Initializes a new instance using the given writer.
+		/// </summary>
+		/// <param name="writer">The writer.</param>
+		public ObjectRecordWriter(CsvWriter writer) : base(writer) { }
+
+		/// <summary>
+		/// Creates a <see cref="Delegate"/> of type <see cref="Action{T}"/>
+		/// that will write the given record using the current writer row.
+		/// </summary>
+		/// <typeparam name="T">The record type.</typeparam>
+		/// <param name="record">The record.</param>
+		protected override Action<T> CreateWriteDelegate<T>(T record)
+		{
+			var type = Writer.GetTypeForRecord(record);
+
+			if (Writer.Context.Maps[type] == null)
+			{
+				Writer.Context.Maps.Add(Writer.Context.AutoMap(type));
+			}
+
+			var recordParameter = Expression.Parameter(typeof(T), "record");
+			var recordParameterConverted = Expression.Convert(recordParameter, type);
+
+			// Get a list of all the members so they will
+			// be sorted properly.
+			var members = new MemberMapCollection();
+			members.AddMembers(Writer.Context.Maps[type]);
+
+			if (members.Count == 0)
+			{
+				throw new WriterException(Writer.Context, $"No properties are mapped for type '{type.FullName}'.");
+			}
+
+			var delegates = new List<Action<T>>();
+
+			foreach (var memberMap in members)
+			{
+				if (memberMap.Data.WritingConvertExpression != null)
+				{
+					// The user is providing the expression to do the conversion.
+					var constructor = typeof(ConvertToStringArgs<T>).GetConstructor(new Type[] { typeof(T) });
+					var args = Expression.New(constructor, recordParameterConverted);
+					Expression exp = Expression.Invoke(memberMap.Data.WritingConvertExpression, args);
+					exp = Expression.Call(Expression.Constant(Writer), nameof(Writer.WriteField), null, exp);
+					delegates.Add(Expression.Lambda<Action<T>>(exp, recordParameter).Compile());
+					continue;
+				}
+
+				if (!Writer.CanWrite(memberMap))
+				{
+					continue;
+				}
+
+				Expression fieldExpression;
+
+				if (memberMap.Data.IsConstantSet)
+				{
+					if (memberMap.Data.Constant == null)
+					{
+						fieldExpression = Expression.Constant(string.Empty);
+					}
+					else
+					{
+						fieldExpression = Expression.Constant(memberMap.Data.Constant);
+						var typeConverterExpression = Expression.Constant(Writer.Context.TypeConverterCache.GetConverter(memberMap.Data.Constant.GetType()));
+						var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
+						fieldExpression = Expression.Convert(fieldExpression, typeof(object));
+						fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(Writer), Expression.Constant(memberMap.Data));
+					}
+				}
+				else
+				{
+					if (memberMap.Data.TypeConverter == null)
+					{
+						// Skip if the type isn't convertible.
+						continue;
+					}
+
+					fieldExpression = ExpressionManager.CreateGetMemberExpression(recordParameterConverted, Writer.Context.Maps[type], memberMap);
+
+					var typeConverterExpression = Expression.Constant(memberMap.Data.TypeConverter);
+					memberMap.Data.TypeConverterOptions = TypeConverterOptions.Merge(new TypeConverterOptions { CultureInfo = Writer.Configuration.CultureInfo }, Writer.Context.TypeConverterOptionsCache.GetOptions(memberMap.Data.Member.MemberType()), memberMap.Data.TypeConverterOptions);
+
+					var method = typeof(ITypeConverter).GetMethod(nameof(ITypeConverter.ConvertToString));
+					fieldExpression = Expression.Convert(fieldExpression, typeof(object));
+					fieldExpression = Expression.Call(typeConverterExpression, method, fieldExpression, Expression.Constant(Writer), Expression.Constant(memberMap.Data));
+
+					if (type.GetTypeInfo().IsClass)
+					{
+						var areEqualExpression = Expression.Equal(recordParameterConverted, Expression.Constant(null));
+						fieldExpression = Expression.Condition(areEqualExpression, Expression.Constant(string.Empty), fieldExpression);
+					}
+				}
+
+				var writeFieldMethodCall = Expression.Call(Expression.Constant(Writer), nameof(Writer.WriteConvertedField), null, fieldExpression, Expression.Constant(memberMap.Data.Type));
+
+				delegates.Add(Expression.Lambda<Action<T>>(writeFieldMethodCall, recordParameter).Compile());
+			}
+
+			var action = CombineDelegates(delegates) ?? new Action<T>((T parameter) => { });
+
+			return action;
+		}
+	}
+}
-- 
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