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/Expressions/RecordWriter.cs      | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/RecordWriter.cs

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

diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/RecordWriter.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/RecordWriter.cs
new file mode 100644
index 0000000..ca1194f
--- /dev/null
+++ b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/RecordWriter.cs
@@ -0,0 +1,109 @@
+// 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;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace CsvHelper.Expressions
+{
+	/// <summary>
+	/// Base implementation for classes that write records.
+	/// </summary>
+	public abstract class RecordWriter
+	{
+		private readonly Dictionary<int, Delegate> typeActions = new Dictionary<int, Delegate>();
+
+		/// <summary>
+		/// Gets the writer.
+		/// </summary>
+		protected CsvWriter Writer { get; private set; }
+
+		/// <summary>
+		/// The expression manager.
+		/// </summary>
+		protected ExpressionManager ExpressionManager { get; private set; }
+
+		/// <summary>
+		/// Initializes a new instance using the given writer.
+		/// </summary>
+		/// <param name="writer">The writer.</param>
+		public RecordWriter(CsvWriter writer)
+		{
+			Writer = writer;
+			ExpressionManager = ObjectResolver.Current.Resolve<ExpressionManager>(writer);
+		}
+
+		/// <summary>
+		/// Writes the record to the current row.
+		/// </summary>
+		/// <typeparam name="T">Type of the record.</typeparam>
+		/// <param name="record">The record.</param>
+		public void Write<T>(T record)
+		{
+			try
+			{
+				GetWriteDelegate(record)(record);
+			}
+			catch (TargetInvocationException ex)
+			{
+				if (ex.InnerException != null)
+				{
+					throw ex.InnerException;
+				}
+				else
+				{
+					throw;
+				}
+			}
+		}
+
+		/// <summary>
+		/// Gets the delegate to write the given record. 
+		/// If the delegate doesn't exist, one will be created and cached.
+		/// </summary>
+		/// <typeparam name="T">The record type.</typeparam>
+		/// <param name="record">The record.</param>
+		protected Action<T> GetWriteDelegate<T>(T record)
+		{
+			var type = typeof(T);
+			var typeKeyName = type.AssemblyQualifiedName;
+			if (type == typeof(object))
+			{
+				type = record.GetType();
+				typeKeyName += $"|{type.AssemblyQualifiedName}";
+			}
+
+			int typeKey = typeKeyName.GetHashCode();
+
+			if (!typeActions.TryGetValue(typeKey, out Delegate action))
+			{
+				typeActions[typeKey] = action = CreateWriteDelegate(record);
+			}
+
+			return (Action<T>)action;
+		}
+
+		/// <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 abstract Action<T> CreateWriteDelegate<T>(T record);
+
+		/// <summary>
+		/// Combines the delegates into a single multicast delegate.
+		/// This is needed because Silverlight doesn't have the
+		/// Delegate.Combine( params Delegate[] ) overload.
+		/// </summary>
+		/// <param name="delegates">The delegates to combine.</param>
+		/// <returns>A multicast delegate combined from the given delegates.</returns>
+		protected virtual Action<T> CombineDelegates<T>(IEnumerable<Action<T>> delegates)
+		{
+			return (Action<T>)delegates.Aggregate<Delegate, Delegate>(null, Delegate.Combine);
+		}
+	}
+}
-- 
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