src/02_Data/Data.Core/Internal/ExpressionResolver.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using Mkh.Data.Abstractions.Adapter;
using Mkh.Data.Abstractions.Queryable;
using Mkh.Data.Core.Extensions;
using Mkh.Data.Core.Internal.QueryStructure;

namespace Mkh.Data.Core.Internal;

/// <summary>
/// 表达式解析器
/// </summary>
public class ExpressionResolver
{
    public static string Resolve(QueryBody queryBody, LambdaExpression expression, IQueryParameters parameters)
    {
        if (expression == null)
            return string.Empty;

        var sqlBuilder = new StringBuilder();

        Resolve(queryBody, expression, expression, sqlBuilder, parameters);

        return sqlBuilder.ToString();
    }

    public static void Resolve(QueryBody queryBody, Expression expression, LambdaExpression fullLambda, StringBuilder sqlBuilder, IQueryParameters parameters)
    {
        switch (expression.NodeType)
        {
            case ExpressionType.Lambda:
                Resolve(queryBody, (expression as LambdaExpression)!.Body, fullLambda, sqlBuilder, parameters);
                break;
            case ExpressionType.Convert:
            case ExpressionType.ConvertChecked:
                Resolve(queryBody, (expression as UnaryExpression)!.Operand, fullLambda, sqlBuilder, parameters);
                break;
            case ExpressionType.Add:
            case ExpressionType.AddChecked:
            case ExpressionType.Subtract:
            case ExpressionType.SubtractChecked:
            case ExpressionType.Multiply:
            case ExpressionType.MultiplyChecked:
            case ExpressionType.Divide:
            case ExpressionType.Modulo:
            case ExpressionType.And:
            case ExpressionType.AndAlso:
            case ExpressionType.Or:
            case ExpressionType.OrElse:
            case ExpressionType.LessThan:
            case ExpressionType.LessThanOrEqual:
            case ExpressionType.GreaterThan:
            case ExpressionType.GreaterThanOrEqual:
            case ExpressionType.Equal:
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