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https://gitee.com/dotnetchina/SqlSugar.git
synced 2025-05-18 05:59:34 +08:00
546 lines
23 KiB
C#
546 lines
23 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Text;
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namespace SqlSugar
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{
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public class ExpressionTool
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{
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public static bool IsComparisonOperatorBool(BinaryExpression binaryExp)
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{
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return binaryExp.NodeType.IsIn(ExpressionType.Equal,
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ExpressionType.GreaterThan, ExpressionType.GreaterThanOrEqual,
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ExpressionType.LessThan, ExpressionType.LessThanOrEqual);
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}
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public static string GetOperator(ExpressionType expressiontype)
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{
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switch (expressiontype)
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{
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case ExpressionType.And:
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return "&";
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case ExpressionType.AndAlso:
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return "AND";
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case ExpressionType.Equal:
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return "=";
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case ExpressionType.GreaterThan:
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return ">";
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case ExpressionType.GreaterThanOrEqual:
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return ">=";
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case ExpressionType.LessThan:
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return "<";
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case ExpressionType.LessThanOrEqual:
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return "<=";
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case ExpressionType.NotEqual:
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return "<>";
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case ExpressionType.Or:
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return "|";
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case ExpressionType.OrElse:
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return "OR";
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case ExpressionType.Add:
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case ExpressionType.AddChecked:
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return "+";
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case ExpressionType.Subtract:
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case ExpressionType.SubtractChecked:
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return "-";
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case ExpressionType.Divide:
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return "/";
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case ExpressionType.Multiply:
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case ExpressionType.MultiplyChecked:
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return "*";
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case ExpressionType.Modulo:
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return "%";
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case ExpressionType.Coalesce:
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throw new Exception("Expression no support ?? ,Use SqlFunc.IsNull");
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default:
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Check.ThrowNotSupportedException(string.Format(ErrorMessage.OperatorError, expressiontype.ToString()));
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return null;
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}
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}
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public static void GetOneToOneInfo<T>(SqlSugarProvider context,Expression<Func<T, object>> LeftObject, out MemberExpression memberExpression, out string navObjectName, out EntityColumnInfo navColumn, out EntityInfo navEntityInfo, out EntityColumnInfo navPkColumn)
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{
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memberExpression = ((LeftObject as LambdaExpression).Body as MemberExpression);
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var listItemType = typeof(T);
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var listItemEntity = context.EntityMaintenance.GetEntityInfo(listItemType);
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var listPkColumn = listItemEntity.Columns.Where(it => it.IsPrimarykey).FirstOrDefault();
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navObjectName = memberExpression.Member.Name;
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var navObjectName2 = navObjectName;
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var navObjectNamePropety = listItemType.GetProperty(navObjectName);
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var navObjectNameColumnInfo = listItemEntity.Columns.First(it => it.PropertyName == navObjectName2);
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Check.ExceptionEasy(navObjectNameColumnInfo.Navigat == null, $"{navObjectName} not [Navigat(..)] ", $"{navObjectName} 没有导航特性 [Navigat(..)] ");
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Check.ExceptionEasy(navObjectNameColumnInfo.Navigat.NavigatType != NavigateType.OneToOne, $"IncludeLeftJoin can only be one-on-one ", $"IncludeLeftJoin 只能是一对一 ");
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navColumn = listItemEntity.Columns.FirstOrDefault(it => it.PropertyName == navObjectNameColumnInfo.Navigat.Name);
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Check.ExceptionEasy(navColumn == null, "OneToOne navigation configuration error", $"OneToOne导航配置错误： 实体{ listItemEntity.EntityName } 不存在{navObjectNameColumnInfo.Navigat.Name}");
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var navType = navObjectNamePropety.PropertyType;
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navEntityInfo = context.EntityMaintenance.GetEntityInfo(navType);
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context.InitMappingInfo(navEntityInfo.Type);
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navPkColumn = navEntityInfo.Columns.Where(it => it.IsPrimarykey).FirstOrDefault();
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Check.ExceptionEasy(navPkColumn == null && navObjectNameColumnInfo.Navigat.Name2 == null, navEntityInfo.EntityName + "need primarykey", navEntityInfo.EntityName + " 需要主键");
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if (navObjectNameColumnInfo.Navigat.Name2.HasValue())
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{
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navPkColumn = navEntityInfo.Columns.Where(it => it.PropertyName == navObjectNameColumnInfo.Navigat.Name2).FirstOrDefault();
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}
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}
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public static List<ParameterExpression> ExpressionParameters(Expression expression)
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{
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List<ParameterExpression> parameters = null;
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if (expression is LambdaExpression)
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{
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if ((expression as LambdaExpression).Parameters != null)
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{
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parameters = (expression as LambdaExpression).Parameters.ToList();
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}
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}
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return parameters;
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}
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public static object GetValue(object value,ExpressionContext context)
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{
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if (value == null) return value;
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var type = value.GetType();
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if (type.IsEnum() && type != typeof(DateType) && type != typeof(JoinType) && type != typeof(OrderByType))
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{
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if (context.TableEnumIsString == true)
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{
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return value.ToString();
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}
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else
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{
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return Convert.ToInt64(value);
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}
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}
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else
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return value;
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}
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public static Expression GetLambdaExpressionBody(Expression expression)
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{
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Expression newExp = expression;
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if (newExp is LambdaExpression)
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{
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newExp = (newExp as LambdaExpression).Body;
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}
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return newExp;
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}
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public static string GetMethodName(Expression expression)
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{
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if (expression is MethodCallExpression)
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{
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return (expression as MethodCallExpression).Method.Name;
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}
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return null;
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}
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public static Type GetMemberInfoType(MemberInfo member)
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{
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switch (member.MemberType)
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{
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case MemberTypes.Event:
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return ((EventInfo)member).EventHandlerType;
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case MemberTypes.Field:
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return ((FieldInfo)member).FieldType;
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case MemberTypes.Method:
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return ((MethodInfo)member).ReturnType;
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case MemberTypes.Property:
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return ((PropertyInfo)member).PropertyType;
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default:
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return null;
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}
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}
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public static bool IsLogicOperator(string operatorValue)
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{
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return operatorValue == "&&" || operatorValue == "||" || operatorValue == "AND" || operatorValue == "OR";
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}
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public static bool IsLogicOperator(Expression expression)
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{
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return expression.NodeType == ExpressionType.And ||
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expression.NodeType == ExpressionType.AndAlso ||
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expression.NodeType == ExpressionType.Or ||
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expression.NodeType == ExpressionType.OrElse;
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}
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public static bool IsComparisonOperator(Expression expression)
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{
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return expression.NodeType != ExpressionType.And &&
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expression.NodeType != ExpressionType.AndAlso &&
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expression.NodeType != ExpressionType.Or &&
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expression.NodeType != ExpressionType.OrElse;
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}
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public static object GetMemberValue(MemberInfo member, Expression expression)
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{
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var rootExpression = expression as MemberExpression;
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var memberInfos = new Stack<MemberInfo>();
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var fieldInfo = member as System.Reflection.FieldInfo;
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object reval = null;
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MemberExpression memberExpr = null;
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while (expression is MemberExpression)
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{
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memberExpr = expression as MemberExpression;
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memberInfos.Push(memberExpr.Member);
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if (memberExpr.Expression == null)
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{
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var isProperty = memberExpr.Member.MemberType == MemberTypes.Property;
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var isField = memberExpr.Member.MemberType == MemberTypes.Field;
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if (isProperty)
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{
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try
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{
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reval = GetPropertyValue(memberExpr);
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}
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catch
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{
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reval = null;
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}
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}
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else if (isField)
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{
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reval = GetFiledValue(memberExpr);
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}
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}
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if (memberExpr.Expression == null)
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{
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}
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expression = memberExpr.Expression;
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}
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// fetch the root object reference:
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var constExpr = expression as ConstantExpression;
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if (constExpr == null)
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{
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return DynamicInvoke(rootExpression);
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}
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object objReference = constExpr.Value;
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// "ascend" back whence we came from and resolve object references along the way:
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while (memberInfos.Count > 0) // or some other break condition
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{
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var mi = memberInfos.Pop();
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if (mi.MemberType == MemberTypes.Property)
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{
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var objProp = objReference.GetType().GetProperties().Where(it=>it.Name== mi.Name).First();
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if (objProp == null)
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{
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objReference = DynamicInvoke(expression, rootExpression == null ? memberExpr : rootExpression);
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}
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else
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{
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objReference = objProp.GetValue(objReference, null);
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}
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}
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else if (mi.MemberType == MemberTypes.Field)
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{
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var objField = objReference.GetType().GetField(mi.Name);
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if (objField == null)
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{
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objReference = DynamicInvoke(expression, rootExpression == null ? memberExpr : rootExpression);
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}
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else
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{
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objReference = objField.GetValue(objReference);
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}
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}
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}
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reval = objReference;
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return reval;
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}
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internal static Expression RemoveConvert(Expression item)
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{
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for (int i = 0; i < 10; i++)
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{
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if ((item is UnaryExpression) && (item as UnaryExpression).NodeType == ExpressionType.Convert)
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{
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item = (item as UnaryExpression).Operand;
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}
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else
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{
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break;
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}
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}
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return item;
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}
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internal static Expression RemoveConvertThanOne(Expression item)
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{
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for (int i = 0; i < 10; i++)
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{
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if ((item is UnaryExpression)
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&& (item as UnaryExpression).NodeType == ExpressionType.Convert
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&& (item as UnaryExpression).Operand is UnaryExpression)
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{
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item = (item as UnaryExpression).Operand;
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}
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else
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{
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break;
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}
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}
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return item;
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}
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public static string GetMemberName(Expression expression)
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{
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if (expression is LambdaExpression)
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{
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expression = (expression as LambdaExpression).Body;
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}
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if (expression is UnaryExpression)
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{
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expression = ((UnaryExpression)expression).Operand;
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}
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var member = (expression as MemberExpression).Member.Name;
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return member;
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}
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internal static object GetExpressionValue(Expression expression)
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{
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try
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{
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if (expression is ConstantExpression)
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{
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return (expression as ConstantExpression).Value;
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}
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else
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{
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return GetMemberValue((expression as MemberExpression).Member, expression);
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}
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}
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catch
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{
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return LambdaExpression.Lambda(expression).Compile().DynamicInvoke();
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}
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}
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public static object GetFiledValue(MemberExpression memberExpr)
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{
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if (!(memberExpr.Member is FieldInfo))
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{
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return DynamicInvoke(memberExpr);
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}
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object reval = null;
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FieldInfo field = (FieldInfo)memberExpr.Member;
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Check.Exception(field.IsPrivate, string.Format(" Field \"{0}\" can't be private ", field.Name));
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reval = field.GetValue(memberExpr.Member);
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if (reval != null && reval.GetType().IsClass() && reval.GetType() != UtilConstants.StringType)
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{
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var fieldName = memberExpr.Member.Name;
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var proInfo = reval.GetType().GetProperty(fieldName);
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if (proInfo != null)
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{
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reval = proInfo.GetValue(reval, null);
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}
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var fieInfo = reval.GetType().GetField(fieldName);
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if (fieInfo != null)
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{
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reval = fieInfo.GetValue(reval);
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}
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if (fieInfo == null && proInfo == null)
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{
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Check.Exception(field.IsPrivate, string.Format(" Field \"{0}\" can't be private ", field.Name));
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}
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}
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return reval;
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}
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public static bool IsConstExpression(MemberExpression memberExpr)
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{
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var result = false;
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while (memberExpr != null && memberExpr.Expression != null)
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{
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var isConst = memberExpr.Expression is ConstantExpression;
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if (isConst)
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{
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result = true;
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break;
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}
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memberExpr = memberExpr.Expression as MemberExpression;
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}
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return result;
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}
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public static object GetPropertyValue(MemberExpression memberExpr)
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{
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if (!(memberExpr.Member is PropertyInfo))
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{
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return DynamicInvoke(memberExpr);
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}
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object reval = null;
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PropertyInfo pro = (PropertyInfo)memberExpr.Member;
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reval = pro.GetValue(memberExpr.Member, null);
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if (reval != null && reval.GetType().IsClass() && reval.GetType() != UtilConstants.StringType)
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{
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var fieldName = memberExpr.Member.Name;
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var proInfo = reval.GetType().GetProperty(fieldName);
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if (proInfo != null)
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{
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reval = proInfo.GetValue(reval, null);
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}
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var fieInfo = reval.GetType().GetField(fieldName);
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if (fieInfo != null)
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{
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reval = fieInfo.GetValue(reval);
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}
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if (fieInfo == null && proInfo == null)
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{
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Check.Exception(true, string.Format(" Property \"{0}\" can't be private ", pro.Name));
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}
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}
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return reval;
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}
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public static object DynamicInvoke(Expression expression, MemberExpression memberExpression = null)
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{
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try
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{
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object value = Expression.Lambda(expression).Compile().DynamicInvoke();
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if (value != null && value.GetType().IsClass() && value.GetType() != UtilConstants.StringType && memberExpression != null)
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{
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value = Expression.Lambda(memberExpression).Compile().DynamicInvoke();
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}
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return value;
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}
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catch (InvalidOperationException ex)
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{
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return new MapperExpressionResolve(expression,ex).GetSql(); ;
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}
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catch (Exception ex)
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{
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throw new Exception("No support "+expression.ToString()+" "+ex.Message);
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}
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}
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public static Type GetPropertyOrFieldType(MemberInfo propertyOrField)
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{
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if (propertyOrField.MemberType == MemberTypes.Property)
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return ((PropertyInfo)propertyOrField).PropertyType;
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if (propertyOrField.MemberType == MemberTypes.Field)
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return ((FieldInfo)propertyOrField).FieldType;
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throw new NotSupportedException();
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}
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public static bool IsEntity(Type type)
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{
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return type.IsClass() && type != UtilConstants.StringType;
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}
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public static bool IsValueType(Type type)
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{
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return !IsEntity(type);
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}
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public static bool IsUnConvertExpress(Expression item)
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{
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return item is UnaryExpression && item.NodeType == ExpressionType.Convert;
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}
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internal static List<NewExpressionInfo> GetNewexpressionInfos(Expression item,ExpressionContext context, BaseResolve baseResolve)
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{
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List<NewExpressionInfo> result = new List<NewExpressionInfo>();
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foreach (MemberBinding binding in ((MemberInitExpression)item).Bindings)
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{
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if (binding.BindingType != MemberBindingType.Assignment)
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{
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throw new NotSupportedException();
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}
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MemberAssignment memberAssignment = (MemberAssignment)binding;
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NewExpressionInfo additem = new NewExpressionInfo();
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if (memberAssignment.Expression is MemberExpression)
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{
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additem.LeftNameName = memberAssignment.Member.Name;
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var member = (memberAssignment.Expression as MemberExpression).Expression;
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additem.ShortName = member + "";
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additem.RightName = (memberAssignment.Expression as MemberExpression).Member.Name;
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additem.RightDbName = context.GetDbColumnName(member.Type.Name, additem.RightName);
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result.Add(additem);
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}
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else if (memberAssignment.Expression is ConstantExpression)
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{
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var value = ((ConstantExpression)memberAssignment.Expression).Value;
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//var leftInfo = keys[i];
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additem.Type = nameof(ConstantExpression);
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additem.RightName = memberAssignment.Member.Name;
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additem.ShortName = memberAssignment.Member.Name;
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additem.RightName = memberAssignment.Member.Name;
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additem.LeftNameName = memberAssignment.Member.Name;
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additem.RightDbName = UtilMethods.GetSqlValue(value);
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//additem.Value = "";
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result.Add(additem);
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}
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else
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{
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var value = baseResolve.GetNewExpressionValue(memberAssignment.Expression);
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//var leftInfo = keys[i];
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additem.Type = nameof(ConstantExpression);
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additem.RightName = memberAssignment.Member.Name;
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additem.ShortName = memberAssignment.Member.Name;
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additem.RightName = memberAssignment.Member.Name;
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additem.LeftNameName = memberAssignment.Member.Name;
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additem.RightDbName = value;
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//additem.Value = "";
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result.Add(additem);
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}
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}
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return result;
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}
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internal static List<NewExpressionInfo> GetNewDynamicexpressionInfos(Expression item, ExpressionContext context, BaseResolve baseResolve)
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{
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List<NewExpressionInfo> result = new List<NewExpressionInfo>();
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int i = 0;
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foreach (var binding in ((NewExpression)item).Arguments)
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{
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NewExpressionInfo additem = new NewExpressionInfo();
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var keys = ((NewExpression)item).Members;
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if (binding is MemberExpression)
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{
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var member = (MemberExpression)binding;
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var entityName = member.Expression?.Type?.Name;
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//var memberAssignment = binding;
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//NewExpressionInfo additem = new NewExpressionInfo();
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additem.RightName = member.Member.Name;
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additem.ShortName = member.Expression + "";
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additem.RightName = member.Member.Name;
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additem.RightDbName = context.GetDbColumnName(entityName, additem.RightName);
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additem.LeftNameName = member.Member.Name;
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//additem.Value = "";
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result.Add(additem);
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}
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else if (binding is ConstantExpression)
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{
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var value = ((ConstantExpression)binding).Value;
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var leftInfo = keys[i];
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additem.Type = nameof(ConstantExpression);
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additem.RightName = leftInfo.Name;
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additem.ShortName = leftInfo.Name;
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additem.RightName = leftInfo.Name;
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additem.LeftNameName = leftInfo.Name;
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additem.RightDbName = UtilMethods.GetSqlValue(value);
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//additem.Value = "";
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result.Add(additem);
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}
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else
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{
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var value = baseResolve.GetNewExpressionValue(binding);
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var leftInfo = keys[i];
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additem.Type = nameof(ConstantExpression);
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additem.RightName = leftInfo.Name;
|
||
additem.ShortName = leftInfo.Name;
|
||
additem.RightName = leftInfo.Name;
|
||
additem.LeftNameName = leftInfo.Name;
|
||
additem.RightDbName = value;
|
||
//additem.Value = "";
|
||
result.Add(additem);
|
||
}
|
||
i++;
|
||
}
|
||
return result;
|
||
}
|
||
}
|
||
}
|