src/Library/NetPro.Dapper/Expressions/DapperSmart.cs

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using Dapper;
using Microsoft.CSharp.RuntimeBinder;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Text;

namespace NetPro.Dapper.Expressions
{
    /// <summary>
    /// DapperSmart同步方法扩展
    /// </summary>
    public static partial class DapperSmart
    {
        static DapperSmart()
        {
            SetDialect(_dialect);
        }

        private static Dialect _dialect = Dialect.SQLServer;
        private static string _encapsulation;
        private static string _getIdentitySql;
        private static string _getPagedListSql;

        private static readonly ConcurrentDictionary<Type, string> TableNames = new ConcurrentDictionary<Type, string>();
        private static readonly ConcurrentDictionary<string, string> ColumnNames = new ConcurrentDictionary<string, string>();

        private static readonly ConcurrentDictionary<string, string> StringBuilderCacheDict = new ConcurrentDictionary<string, string>();
        private static bool StringBuilderCacheEnabled = true;

        private static ITableNameResolver _tableNameResolver = new TableNameResolver();
        private static IColumnNameResolver _columnNameResolver = new ColumnNameResolver();

        /// <summary>
        /// Append a Cached version of a strinbBuilderAction result based on a cacheKey
        /// </summary>
        /// <param name="sb"></param>
        /// <param name="cacheKey"></param>
        /// <param name="stringBuilderAction"></param>
        private static void StringBuilderCache(StringBuilder sb, string cacheKey, Action<StringBuilder> stringBuilderAction)
        {
            if (StringBuilderCacheEnabled && StringBuilderCacheDict.TryGetValue(cacheKey, out string value))
            {
                sb.Append(value);
                return;
            }

            StringBuilder newSb = new StringBuilder();
            stringBuilderAction(newSb);
            value = newSb.ToString();
            StringBuilderCacheDict.AddOrUpdate(cacheKey, value, (t, v) => value);
            sb.Append(value);
        }

        /// <summary>
        /// Returns the current dialect name