Expression <Func <T, bool> > CreateLambdaBinary(CRLExpression expression)
{
var left = expression.Left;
var right = expression.Right;
var creater = new LambdaCreater <T>();
var type = expression.ExpressionType;
var dic = new Dictionary <string, ExpressionHandler>();
dic.Add("Equal", creater.Equal);
dic.Add("NotEqual", creater.NotEqual);
dic.Add("Greater", creater.Greater);
dic.Add("Less", creater.Less);
dic.Add("GreaterThan", creater.GreaterThan);
dic.Add("LessThan", creater.LessThan);
//todo 更多方法解析
if (!dic.ContainsKey(type))
{
throw new CRLException("没有对应的运算方法 " + type);
}
if (left.Type == CRLExpressionType.MethodCall)//按方法运算 如 b.NameSubstring,Indexof(0,1)=="123"
{
//按属性的子方法
var left2 = CreateLambdaMethodCall2(left);
var value = ObjectConvert.ConvertObject(left2.Type, right.Data);
return(dic[type](left2, value));
}
else//按属性运算 如b.Id==1
{
var member = creater.CreatePropertyExpression(left.Data.ToString());
return(dic[type](member, right.Data));
}
}
Expression <Func <T, bool> > CreateLambdaTree(CRLExpression expression)
{
var expression1 = CreateLambda(expression.Left);
var expression2 = CreateLambda(expression.Right);
switch (expression.ExpType)
{
case ExpressionType.AndAlso:
return(expression1.Compose(expression2, Expression.AndAlso));
case ExpressionType.OrElse:
return(expression1.Compose(expression2, Expression.OrElse));
case ExpressionType.And:
return(expression1.Compose(expression2, Expression.And));
case ExpressionType.Or:
return(expression1.Compose(expression2, Expression.Or));
}
//if (expression.ExpressionType == "AndAlso")
//{
// return expression1.Compose(expression2, Expression.AndAlso);
//}
//else
//{
// return expression1.Compose(expression2, Expression.OrElse);
//}
return(null);
}
FilterData RouteCRLExpression(CRLExpression.CRLExpression exp)
{
if (exp.Type == CRLExpression.CRLExpressionType.Binary || exp.Type == CRLExpression.CRLExpressionType.Tree)//表示二元运算
{
return(BinaryCRLExpression(exp.Left, exp.Right, exp.ExpType));
}
else if (exp.Type == CRLExpression.CRLExpressionType.MethodCall)
{
var methodInfo = exp.Data as CRLExpression.MethodCallObj;
var left = new CRLExpression.CRLExpression()
{
ExpType = methodInfo.ExpressionType, Type = CRLExpression.CRLExpressionType.MethodCallArgs, Data = methodInfo
};
var right = new CRLExpression.CRLExpression()
{
ExpType = methodInfo.ExpressionType, Type = CRLExpression.CRLExpressionType.MethodCallArgs, Data = methodInfo.Args
};
return(BinaryCRLExpression(left, right, methodInfo.ExpressionType));
}
//按值
return(new FilterData()
{
Data = exp.Data, Type = exp.Type
});
}
public CRLExpression.CRLExpression DealParame(CRLExpression.CRLExpression par1, string typeStr, out string typeStr2)
{
var par = par1.Data + "";
typeStr2 = typeStr;
//todo 非关系型数据库不参数化
if (dbContext.DataBaseArchitecture == DataBaseArchitecture.NotRelation)
{
return(par1);
}
if (par1.Data is CRLExpression.MethodCallObj)
{
var method = par1.Data as CRLExpression.MethodCallObj;
var _DBAdapter = DBAdapter.DBAdapterBase.GetDBAdapterBase(dbContext);
var dic = MethodAnalyze.GetMethos(_DBAdapter);
if (!dic.ContainsKey(method.MethodName))
{
throw new CRLException("LambdaQuery不支持方法" + method.MethodName);
}
int newParIndex = parIndex;
par = dic[method.MethodName](method, ref newParIndex, AddParame);
parIndex = newParIndex;
}
//字段会返回替换符
bool needPar = par1.Type == CRLExpression.CRLExpressionType.Value;//是否需要参数化处理
if (!needPar)
{
par1.Data = par;
return(par1);
}
if (needPar)
{
if (par.ToUpper() == "NULL")
{
typeStr2 = "";
if (typeStr == "=")
{
par = " IS NULL ";
}
else if (typeStr == "<>")
{
par = " IS NOT NULL ";
}
}
else
{
QueryParames.Add("par" + parIndex, par);
par = "@par" + parIndex;
parIndex += 1;
}
}
par1.Data = par;
return(par1);
}
Expression CreateLambdaBinary(CRLExpression expression)
{
var left = expression.Left;
var right = expression.Right;
Expression exp;
object value;
var type = expression.ExpType;
if (left.Type == CRLExpressionType.MethodCall)//按方法运算 如 b.NameSubstring,Indexof(0,1)=="123"
{
//按属性的子方法
exp = CreateLambdaMethodCall2(left);
value = ObjectConvert.ConvertObject(exp.Type, right.Data);
}
else if (left.Type == CRLExpressionType.Tree)
{
exp = CreateLambdaBinary(left);//todo 暂时在左边
value = right.Data;
//throw new CRLException("不支持的运算 "+ left.ExpressionType);
}
else//按属性运算 如b.Id==1
{
exp = creater.CreatePropertyExpression(left.Data.ToString());
value = right.Data;
}
switch (type)
{
case ExpressionType.Equal:
return(creater.Equal(exp, value));
case ExpressionType.NotEqual:
return(creater.NotEqual(exp, value));
case ExpressionType.GreaterThan:
return(creater.Greater(exp, value));
case ExpressionType.LessThan:
return(creater.Less(exp, value));
case ExpressionType.GreaterThanOrEqual:
return(creater.GreaterThan(exp, value));
case ExpressionType.LessThanOrEqual:
return(creater.LessThan(exp, value));
case ExpressionType.And:
return(creater.And(exp, value));
case ExpressionType.Or:
return(creater.Or(exp, value));
default:
throw new CRLException("没有对应的运算方法 " + type);
}
}
FilterData BinaryCRLExpression(CRLExpression.CRLExpression left, CRLExpression.CRLExpression right, ExpressionType expressionType)
{
var parLeft = RouteCRLExpression(left);
var parRight = RouteCRLExpression(right);
return(new FilterData()
{
Filter = getFilter(parLeft, parRight, expressionType)
});
}
Expression <Func <T, bool> > CreateLambdaMethodCall(CRLExpression expression)
{
//表示方法调用
var arry = expression.Data.ToString().Split('|');
var propertyName = arry[0];
var methodName = arry[1];
var args = expression.Data.ToString().Substring(propertyName.Length + methodName.Length + 2);
var value = args.Split(',');
if (args == "")
{
value = new string[] { };
}
//if (CreateLambdaMethodCallCache.Count == 0)
//{
// CreateLambdaMethodCallCache.Add("Contains", creater.Contains);
// CreateLambdaMethodCallCache.Add("StartsWith", creater.StartsWith);
// CreateLambdaMethodCallCache.Add("EndsWith", creater.EndsWith);
// CreateLambdaMethodCallCache.Add("IsNullOrEmpty", creater.EndsWith);
//}
MethodHandler method;
switch (methodName)
{
case "Contains":
method = creater.Contains;
break;
case "StartsWith":
method = creater.StartsWith;
break;
case "EndsWith":
method = creater.EndsWith;
break;
case "IsNullOrEmpty":
method = creater.IsNullOrEmpty;
break;
case "Equals":
method = creater.Equals;
break;
default:
throw new CRLException("没有对应的方法 " + methodName);
}
//var a = CreateLambdaMethodCallCache.TryGetValue(methodName, out method);
////todo 更多方法解析
//if (!a)
//{
// throw new CRLException("没有对应的方法 " + methodName);
//}
return(method(propertyName, value));
}
/// <summary>
/// 解析表达式
/// </summary>
/// <param name="exp"></param>
/// <param name="nodeType"></param>
/// <param name="firstLevel">是否首次调用,来用修正bool一元运算</param>
/// <returns></returns>
public CRLExpression.CRLExpression RouteExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
if (exp is BinaryExpression)
{
//like a.Name??str
BinaryExpression be = (BinaryExpression)exp;
if (be.NodeType == ExpressionType.Coalesce)
{
var par1 = new CRLExpression.CRLExpression();
par1.Type = CRLExpression.CRLExpressionType.MethodCall;
var member = be.Left as MemberExpression;
if (member == null)
{
throw new Exception(be.Left + "不为MemberExpression");
}
var args = RouteExpressionHandler(be.Right);
par1.Data = new CRLExpression.MethodCallObj()
{
MemberName = member.Member.Name, MethodName = "IsNull", Args = new List <object>()
{
args.Data
}, MemberQueryName = member.Member.Name
};
return(DealParame(par1, ""));
}
return(BinaryExpressionHandler(be.Left, be.Right, be.NodeType));
}
if (exp is MemberExpression)
{
return(MemberExpressionHandler(exp, nodeType, firstLevel));
}
else if (exp is ConstantExpression)
{
return(ConstantExpressionHandler(exp, nodeType, firstLevel));
}
else if (exp is MethodCallExpression)
{
return(MethodCallExpressionHandler(exp, nodeType, firstLevel));
}
else if (exp is UnaryExpression)
{
return(UnaryExpressionHandler(exp, nodeType, firstLevel));
}
else if (exp is NewArrayExpression)
{
return(NewArrayExpressionHandler(exp, nodeType, firstLevel));
}
else
{
throw new Exception("不支持此语法解析:" + exp);
}
}
CRLExpression BinaryExpressionHandler(Expression left, Expression right, ExpressionType type, int level = 1)
{
var types = new ExpressionType[] { ExpressionType.Equal, ExpressionType.GreaterThan, ExpressionType.GreaterThanOrEqual, ExpressionType.LessThan, ExpressionType.LessThanOrEqual, ExpressionType.NotEqual };
var leftPar = RouteExpressionHandler(left);
var isBinary = types.Contains(type);
var rightPar = RouteExpressionHandler(right);
var e = new CRLExpression()
{
ExpType = type, Left = leftPar, Right = rightPar, Type = isBinary ? CRLExpressionType.Binary : CRLExpressionType.Tree
};
return(e);
}
Expression <Func <T, bool> > CreateLambdaTree(CRLExpression expression)
{
var expression1 = CreateLambda(expression.Left);
var expression2 = CreateLambda(expression.Right);
if (expression.ExpressionType == "AndAlso")
{
return(expression1.Compose(expression2, Expression.AndAlso));
}
else
{
return(expression1.Compose(expression2, Expression.OrElse));
}
return(null);
}
CRLExpression.CRLExpression DealParame(CRLExpression.CRLExpression par1, string typeStr)
{
var par = par1.Data + "";
//typeStr2 = typeStr;
//todo 非关系型数据库不参数化
if (dbContext.DataBaseArchitecture == DataBaseArchitecture.NotRelation)
{
return(par1);
}
if (parIndex > 1000)
{
throw new CRLException("参数计数超过了1000,请确认数据访问对象没有被静态化");
}
switch (par1.Type)
{
case CRLExpression.CRLExpressionType.Value:
#region value
if (par1.Data == null)
{
par = __DBAdapter.IsNotFormat(typeStr != "=") + "null";
}
else
{
QueryParames.Add("par" + parIndex, par);
par = "@par" + parIndex;
parIndex += 1;
}
#endregion
break;
case CRLExpression.CRLExpressionType.MethodCall:
#region method
var method = par1.Data as CRLExpression.MethodCallObj;
var dic = MethodAnalyze.GetMethos(__DBAdapter);
if (!dic.ContainsKey(method.MethodName))
{
throw new CRLException("LambdaQuery不支持扩展方法" + method.MemberQueryName + "." + method.MethodName);
}
int newParIndex = parIndex;
par = dic[method.MethodName](method, ref newParIndex, AddParame);
parIndex = newParIndex;
#endregion
break;
}
par1.DataParamed = par;
return(par1);
}
CRLExpression.CRLExpression BinaryExpressionHandler(Expression left, Expression right, ExpressionType type)
{
StringBuilder sb = new StringBuilder();
sb.Append("(");
var leftPar = RouteExpressionHandler(left);
string typeStr = ExpressionTypeCast(type);
var rightPar = RouteExpressionHandler(right);
#region 修正bool值一元运算
//t1.isTop=1
if (leftPar.Type == CRLExpression.CRLExpressionType.Binary && rightPar.Type == CRLExpression.CRLExpressionType.Name)
{
var proType = ((MemberExpression)right).Type;
if (proType == typeof(bool))
{
rightPar.Data = rightPar.Data + "=1";
}
}
else if (rightPar.Type == CRLExpression.CRLExpressionType.Binary && leftPar.Type == CRLExpression.CRLExpressionType.Name)
{
var proType = ((MemberExpression)left).Type;
if (proType == typeof(bool))
{
leftPar.Data = leftPar.Data + "=1";
}
}
#endregion
string typeStr2;
leftPar = DealParame(leftPar, typeStr, out typeStr2);
sb.Append(leftPar.Data);
rightPar = DealParame(rightPar, typeStr, out typeStr2);
sb.Append(typeStr2);
sb.Append(rightPar.Data);
sb.Append(")");
//return sb.ToString();
var types = new ExpressionType[] { ExpressionType.Equal, ExpressionType.GreaterThan, ExpressionType.GreaterThanOrEqual, ExpressionType.LessThan, ExpressionType.LessThanOrEqual, ExpressionType.NotEqual };
var isBinary = types.Contains(type);
var e = new CRLExpression.CRLExpression()
{
ExpressionType = type.ToString(), Left = leftPar, Right = rightPar, Type = isBinary ? CRLExpression.CRLExpressionType.Binary : CRLExpression.CRLExpressionType.Tree
};
e.SqlOut = sb.ToString();
e.Data = e.SqlOut;
return(e);
}
/// <summary>
/// 转换为Lambda表达式
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public Expression <Func <T, bool> > CreateLambda(CRLExpression expression)
{
if (expression.Type == CRLExpressionType.Tree)
{
//解析一个表达式树
return(CreateLambdaTree(expression));
}
else if (expression.Type == CRLExpressionType.MethodCall)
{
//方法
return(CreateLambdaMethodCall(expression));
}
else
{
//二元运算
return(CreateLambdaBinary(expression) as Expression <Func <T, bool> >);
}
}
public string DealCRLExpression(Expression exp, CRLExpression.CRLExpression b, string typeStr, out bool isNullValue, bool first = false)
{
isNullValue = false;
switch (b.Type)
{
case CRLExpression.CRLExpressionType.Name:
return(FormatFieldPrefix(b.MemberType, b.Data.ToString()));
case CRLExpression.CRLExpressionType.Binary:
return(b.Data.ToString());
default:
var valExp = (b.IsConstantValue || first) ? b : RouteExpressionHandler(exp);
isNullValue = valExp.Data == null;
var par2 = DealParame(valExp, typeStr);
return(par2.DataParamed);
}
}
internal MethodCallExpression CreateLambdaMethodCall2(CRLExpression expression)
{
//表示二元运算的方法
var creater = new LambdaCreater <T>();
var arry = expression.Data.ToString().Split('|');
var propertyName = arry[0];
var methodName = arry[1];
var args = expression.Data.ToString().Substring(propertyName.Length + methodName.Length + 2);
var dic = new Dictionary <string, MethodResultHandler>();
dic.Add("Substring", creater.Substring);
dic.Add("IndexOf", creater.IndexOf);
if (!dic.ContainsKey(methodName))
{
throw new CRLException("没有对应的方法 " + methodName);
}
return(dic[methodName](propertyName, args.Split(',')));
}
Expression <Func <T, bool> > CreateLambdaMethodCall(CRLExpression expression)
{
//表示方法调用
var creater = new LambdaCreater <T>();
var arry = expression.Data.ToString().Split('|');
var propertyName = arry[0];
var methodName = arry[1];
var args = expression.Data.ToString().Substring(propertyName.Length + methodName.Length + 2);
var dic = new Dictionary <string, MethodHandler>();
dic.Add("Contains", creater.Contains);
dic.Add("StartsWith", creater.StartsWith);
dic.Add("EndsWith", creater.EndsWith);
//todo 更多方法解析
if (!dic.ContainsKey(methodName))
{
throw new CRLException("没有对应的方法 " + methodName);
}
return(dic[methodName](propertyName, args.Split(',')));
}
internal MethodCallExpression CreateLambdaMethodCall2(CRLExpression expression)
{
//表示二元运算的方法
var arry = expression.Data.ToString().Split('|');
var propertyName = arry[0];
var methodName = arry[1];
var args = expression.Data.ToString().Substring(propertyName.Length + methodName.Length + 2);
string[] value = args.Split(',');
if (args == "")
{
value = new string[] { };
}
MethodResultHandler method;
switch (methodName)
{
case "Substring":
method = creater.Substring;
break;
case "IndexOf":
method = creater.IndexOf;
break;
case "ToString":
method = creater.ToString;
break;
case "ToInt32":
method = creater.ToInt32;
break;
case "ToDecimal":
method = creater.ToDecimal;
break;
case "ToDouble":
method = creater.ToDouble;
break;
case "ToBoolean":
method = creater.ToBoolean;
break;
case "ToDateTime":
method = creater.ToDateTime;
break;
case "ToInt16":
method = creater.ToInt16;
break;
case "ToSingle":
method = creater.ToSingle;
break;
case "ToLower":
method = creater.ToLower;
break;
case "ToUpper":
method = creater.ToUpper;
break;
default:
throw new CRLException("没有对应的方法 " + methodName);
}
return(method(propertyName, value));
}
CRLExpression.CRLExpression BinaryExpressionHandler(Expression left, Expression right, ExpressionType expType)
{
var isBinary = binaryTypes.Contains(expType);
//string key = "";
string typeStr = ExpressionTypeCast(expType);
string __typeStr2 = typeStr;
string outLeft, outRight;
bool isNullValue = false;
//isBinary = false;
if (isBinary)
{
#region 二元运算缓存 并没有效率提升
//if (SettingConfig.UseLambdaCache&&false)
//{
// CRLExpression.CRLExpression cacheItem;
// key = string.Format("{0}{1}{2}{3}", __PrefixsAllKey, left, expType, right);
// var a = BinaryExpressionCache.TryGetValue(key, out cacheItem);
// if (a)
// {
// outLeft = DealCRLExpression(left, cacheItem.Left, typeStr, out isNullValue);
// outRight = DealCRLExpression(right, cacheItem.Right, typeStr, out isNullValue);
// if (isNullValue)//left为null则语法错误
// {
// __typeStr2 = "";
// }
// cacheItem.SqlOut = string.Format("({0}{1}{2})", outLeft, __typeStr2, outRight);
// cacheItem.Data = cacheItem.SqlOut;
// return cacheItem;
// }
//}
#endregion
}
var sb = "";
var leftPar = RouteExpressionHandler(left);
var rightPar = RouteExpressionHandler(right);
#region 修正bool值一元运算
//b => b.IsTop && b.Id < 10
if (expType == ExpressionType.AndAlso || expType == ExpressionType.OrElse)
{
if (leftPar.Type == CRLExpression.CRLExpressionType.Name)
{
left = left.Equal(Expression.Constant(true));
leftPar = RouteExpressionHandler(left);
}
else if (rightPar.Type == CRLExpression.CRLExpressionType.Name)
{
right = right.Equal(Expression.Constant(true));
rightPar = RouteExpressionHandler(right);
}
}
#endregion
outLeft = DealCRLExpression(left, leftPar, typeStr, out isNullValue, true);
outRight = DealCRLExpression(right, rightPar, typeStr, out isNullValue, true);
if (isNullValue)//left为null则语法错误
{
__typeStr2 = "";
}
sb = string.Format("({0}{1}{2})", outLeft, __typeStr2, outRight);
var e = new CRLExpression.CRLExpression()
{
ExpType = expType, Left = leftPar, Right = rightPar, Type = isBinary ? CRLExpression.CRLExpressionType.Binary : CRLExpression.CRLExpressionType.Tree
};
e.SqlOut = sb;
e.Data = e.SqlOut;
//if (isBinary && SettingConfig.UseLambdaCache && false)
//{
// BinaryExpressionCache[key] = e;
//}
return(e);
}
CRLExpression.CRLExpression MemberExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region MemberExpression
//区分 属性表达带替换符{0} 变量值不带
MemberExpression mExp = (MemberExpression)exp;
if (mExp.Expression != null && mExp.Expression.NodeType == ExpressionType.Parameter) //like b.Name==b.Name1 或b.Name
{
#region MemberParameter
var fieldName = mExp.Member.Name;
var type = mExp.Expression.Type;
if (mExp.Member.ReflectedType.Name.StartsWith("<>f__AnonymousType"))//按匿名类
{
//var queryField = FormatFieldPrefix(type, fieldName);
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = fieldName, MemberType = type
};
//MemberExpressionCache[key] = exp2;
return(exp2);
}
CRL.Attribute.FieldAttribute field;
var a = TypeCache.GetProperties(type, true).TryGetValue(fieldName, out field);
if (!a)
{
throw new CRLException("类型 " + type.Name + "." + fieldName + " 未设置Mapping,请检查查询条件");
}
//if (!string.IsNullOrEmpty(field.VirtualField))//按虚拟字段
//{
// //return filed.VirtualField;
// var queryField = field.VirtualField.Replace("{" + type.FullName + "}", Prefixs[type]);//替换前辍
// var exp2 = new CRLExpression.CRLExpression() { Type = CRLExpression.CRLExpressionType.Name, Data = queryField, MemberType = type };
// //MemberExpressionCache[key] = exp2;
// return exp2;
//}
//var fieldStr = FormatFieldPrefix(type, field.MapingName);//格式化为别名
//return field;
if (firstLevel)
{
var exp2 = exp.Equal(Expression.Constant(true));
return(RouteExpressionHandler(exp2));
}
if (field.DefaultCRLExpression != null)
{
var c2 = field.DefaultCRLExpression;
c2.Data = __DBAdapter.FieldNameFormat(field);
return(c2);
}
var fieldStr = __DBAdapter.FieldNameFormat(field);
var exp3 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = fieldStr, MemberType = type
};
field.DefaultCRLExpression = exp3;
return(exp3);
#endregion
}
else
{
//string key = mExp.ToString() + firstLevel;
//CRLExpression.CRLExpression val;
//var a1 = MemberExpressionCache.TryGetValue(key, out val);
//if (a1)
//{
// return val;
//}
#region 值
bool isConstant;
var obj = GetParameExpressionValue(mExp, out isConstant);
if (obj is Enum)
{
obj = (int)obj;
}
else if (obj is Boolean)//sql2000需要转换
{
obj = Convert.ToInt32(obj);
}
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj, IsConstantValue = isConstant
};
//if (isConstant)
//{
// MemberExpressionCache[key] = exp4;
//}
return(exp4);
#endregion
}
#endregion
}
CRLExpression.CRLExpression DealParame(CRLExpression.CRLExpression par1, string typeStr)
{
var par = par1.Data + "";
//typeStr2 = typeStr;
//todo 非关系型数据库不参数化
if (dbContext.DataBaseArchitecture == DataBaseArchitecture.NotRelation)
{
return(par1);
}
var a = parameDicList.TryGetValue(__DBAdapter.DBType, out string[] parameDic);
if (!a)
{
parameDic = new string[5000];
for (int i = 0; i < 5000; i++)
{
parameDic[i] = __DBAdapter.GetParamName("p", i);
}
parameDicList.TryAdd(__DBAdapter.DBType, parameDic);
}
if (parIndex >= 5000)
{
//MSSQL 参数最多2800
throw new Exception("参数计数超过了5000,请确认数据访问对象没有被静态化" + parIndex);
}
switch (par1.Type)
{
case CRLExpression.CRLExpressionType.Value:
#region value
if (par1.Data == null)
{
par = __DBAdapter.IsNotFormat(typeStr != "=") + "null";
}
else
{
if (SettingConfig.FieldParameName)
{
par1.DataParamed = par;
return(par1); //参数名按字段名
}
var _par = parameDic[parIndex];
AddParame(_par, par);
par = _par;
parIndex += 1;
}
#endregion
break;
case CRLExpression.CRLExpressionType.MethodCall:
#region method
var method = par1.Data as CRLExpression.MethodCallObj;
#region in优化 MSSQL内部已自动优化
var nodeType = method.ExpressionType;
/**
* if (dbContext.DataBaseArchitecture == DataBaseArchitecture.Relation && method.MethodName == "In" && lambdaQueryBase.__AutoInJoin > 5 && nodeType == ExpressionType.Equal)
* {
* var inArgs = method.Args[0] as System.Collections.IEnumerable;
* int _i = 0;
* Type innerType = null;
* var pars = new List<InJoin>();
* var batchNo = System.Guid.NewGuid().ToString().Replace("-", "");
* foreach (var a in inArgs)
* {
* _i += 1;
* if (innerType == null)
* {
* innerType = a.GetType();
* }
* var obj2 = new InJoin() { BatchNo = batchNo, V_String = "" };
* obj2.SetValue(innerType, a);
* pars.Add(obj2);
* }
* if (_i > lambdaQueryBase.__AutoInJoin)
* {
* QueryParames.Add("__batchNO", batchNo);
* var typeJoin = typeof(InJoin);
* var inJoinName = lambdaQueryBase.GetPrefix(typeJoin);
* var joinFormat = string.Format("{1}BatchNo=@__batchNO and {0}={1}V_{2}", method.MemberQueryName, inJoinName, innerType.Name);
* lambdaQueryBase.AddInnerRelation(new TypeQuery(typeJoin), JoinType.Inner, joinFormat);
* par1.DataParamed = "";
* var dbEx = DBExtendFactory.CreateDBExtend(dbContext);
* dbEx.CheckTableCreated(typeJoin);
* __DBAdapter.BatchInsert(pars);
* lambdaQueryBase.__RemoveInJionBatchNo = batchNo;
* return par1;
* }
* }
*/
#endregion
var dic = MethodAnalyze.GetMethos(__DBAdapter);
if (!dic.ContainsKey(method.MethodName))
{
throw new Exception("LambdaQuery不支持扩展方法" + method.MemberQueryName + "." + method.MethodName);
}
int newParIndex = parIndex;
par = dic[method.MethodName](method, ref newParIndex, AddParame);
parIndex = newParIndex;
#endregion
break;
}
par1.DataParamed = par;
return(par1);
}
CRLExpression.CRLExpression MethodCallExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region methodCall
MethodCallExpression mcExp = (MethodCallExpression)exp;
var arguments = new List <object>();
var allArguments = new List <Expression>(mcExp.Arguments);
int argsIndex = 0;
Expression firstArgs;
bool isLambdaQueryJoinExt = false;
if (mcExp.Object == null) //区分静态方法还是实例方法
{
firstArgs = allArguments[0]; //like b.Name.IsNull("22")
argsIndex = 1;
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
else
{
firstArgs = mcExp.Object; //like b.Id.ToString()
if (allArguments.Count > 0 && (allArguments[0] is MemberExpression)) //like ids.Contains(b.Id)
{
var mexp2 = allArguments[0] as MemberExpression;
var firstArgsM = firstArgs as MemberExpression;
//var par2 = (ParameterExpression)mexp2.Expression;
if (mexp2.Expression is ParameterExpression && firstArgsM.Expression is ConstantExpression)
{
firstArgs = allArguments[0];
argsIndex = 1;
allArguments.Add(mcExp.Object);
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
}
}
#region MethodCallExpression
//bool isConstantMethod = false;
MemberExpression memberExpression;
string methodField = "";
string memberName = "";
string methodName = mcExp.Method.Name;
if (firstArgs is ParameterExpression || isLambdaQueryJoinExt)
{
var exp2 = mcExp.Arguments[1] as UnaryExpression;
var type = exp2.Operand.GetType();
var p = type.GetProperty("Body");
var exp3 = p.GetValue(exp2.Operand, null) as Expression;
methodField = RouteExpressionHandler(exp3).SqlOut;
memberName = "";
}
else if (firstArgs is UnaryExpression)//like a.Code.Count()
{
memberExpression = (firstArgs as UnaryExpression).Operand as MemberExpression;
memberName = memberExpression.Member.Name;
var field = TypeCache.GetProperties(memberExpression.Expression.Type, true)[memberName];
memberName = __DBAdapter.FieldNameFormat(field);
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
}
else if (firstArgs is BinaryExpression)
{
var be = firstArgs as BinaryExpression;
methodField = BinaryExpressionHandler(be.Left, be.Right, be.NodeType).Data.ToString();
}
else if (firstArgs is MemberExpression)
{
//like a.Code
memberExpression = firstArgs as MemberExpression;
memberName = memberExpression.Member.Name;
var type = memberExpression.Expression.Type;
if (type.IsSubclassOf(typeof(IModel)))
{
var field = TypeCache.GetProperties(type, true)[memberExpression.Member.Name];
memberName = __DBAdapter.FieldNameFormat(field);
}
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
//var allConstant = true;
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj);
}
}
else
{
//like Convert.ToDateTime(times)
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj2 = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj2);
}
}
}
else if (firstArgs is ConstantExpression)//按常量
{
//like DateTime.Parse("2016-02-11 12:56"),
//isConstantMethod = true;
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
}
//else
//{
// throw new CRLException("不支持此语法解析:" + args);
//}
if (nodeType == null)
{
nodeType = ExpressionType.Equal;
}
if (string.IsNullOrEmpty(methodField))
{
//当是常量转换方法
var method = mcExp.Method;
object obj = null;
if (method.IsStatic) //like DateTime.Parse("2016-02-11")
{
if (method.IsGenericMethod) //扩展方法,like public static bool Contains<TSource>(this IEnumerable<TSource> source, TSource value)
{
var valueObj = (ExpressionValueObj)arguments[1];
if (valueObj == null)
{
throw new Exception("不支持此语法:" + mcExp);
}
memberName = valueObj.member.Name;
arguments = new List <object>()
{
arguments[0]
};
methodField = valueObj.Value.ToString();
goto lable1;
}
else
{
obj = method.Invoke(null, arguments.ToArray());
}
}
else//like time.AddDays(1)
{
if (arguments.Count == 0)
{
throw new Exception("未能解析" + exp);
}
var args1 = arguments.First();
arguments.RemoveAt(0);
if (arguments.Count > 0)
{
if (arguments[0] is ExpressionValueObj)
{
throw new Exception("不支持这样的语法:" + exp);
}
}
obj = method.Invoke(args1, arguments.ToArray());
}
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
};
return(exp2);
}
lable1:
var methodInfo = new CRLExpression.MethodCallObj()
{
Args = arguments, ExpressionType = nodeType.Value, MemberName = memberName, MethodName = methodName, MemberQueryName = methodField
};
methodInfo.ReturnType = mcExp.Type;
#endregion
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.MethodCall, Data = methodInfo
};
return(exp4);
#endregion
}
CRLExpression.CRLExpression BinaryExpressionHandler(Expression left, Expression right, ExpressionType expType)
{
var isBinary = binaryTypes.Contains(expType);
//string key = "";
string typeStr = ExpressionTypeCast(expType);
string __typeStr2 = typeStr;
string outLeft, outRight;
bool isNullValue = false;
//isBinary = false;
if (isBinary)
{
}
var sb = "";
var leftPar = RouteExpressionHandler(left);
var rightPar = RouteExpressionHandler(right);
#region 修正bool值一元运算
//b => b.IsTop && b.Id < 10
if (expType == ExpressionType.AndAlso || expType == ExpressionType.OrElse)
{
if (leftPar.Type == CRLExpression.CRLExpressionType.Name)
{
left = left.Equal(Expression.Constant(true));
leftPar = RouteExpressionHandler(left);
}
else if (rightPar.Type == CRLExpression.CRLExpressionType.Name)
{
right = right.Equal(Expression.Constant(true));
rightPar = RouteExpressionHandler(right);
}
}
#endregion
outLeft = DealCRLExpression(left, leftPar, typeStr, out isNullValue, true);
outRight = DealCRLExpression(right, rightPar, typeStr, out isNullValue, true);
#region 固定名称的参数
if (isBinary && SettingConfig.FieldParameName)
{
if ((int)(leftPar.Type | rightPar.Type) == 12)
{
CRLExpression.CRLExpression tempName;
CRLExpression.CRLExpression tempValue;
if (leftPar.Type == CRLExpression.CRLExpressionType.Name)
{
tempName = leftPar;
tempValue = rightPar;
}
else
{
tempName = rightPar;
tempValue = leftPar;
outLeft = outRight;
}
existsTempParameName = existsTempParameName ?? new List <string>();
var pre = Prefixs[tempName.MemberType];
pre = pre.Replace(".", $"_");
var pName = __DBAdapter.GetParamName(pre, tempName.Data_);
if (existsTempParameName.Contains(pName))
{
pName = pName.Replace("_", "_" + existsTempParameName.Count + "_");
}
AddParame(pName, tempValue.Data);
existsTempParameName.Add(pName);
outRight = pName;
}
}
#endregion
if (isNullValue)//left为null则语法错误
{
__typeStr2 = "";
}
if (isBinary)
{
sb = string.Format("({0}{1}{2})", outLeft, __typeStr2, outRight);
}
else
{
sb = string.Format("{0}{1}{2}", outLeft, __typeStr2, outRight);
}
var e = new CRLExpression.CRLExpression()
{
ExpType = expType, Left = leftPar, Right = rightPar, Type = isBinary ? CRLExpression.CRLExpressionType.Binary : CRLExpression.CRLExpressionType.Tree
};
e.SqlOut = sb;
e.Data = e.SqlOut;
return(e);
}
CRLExpression.CRLExpression MethodCallExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region methodCall
MethodCallExpression mcExp = (MethodCallExpression)exp;
var arguments = new List <object>();
var allArguments = mcExp.Arguments;
int argsIndex = 0;
Expression firstArgs;
bool isLambdaQueryJoinExt = false;
if (mcExp.Method.IsStatic) //区分静态方法还是实例方法
{
firstArgs = allArguments[0]; //like b.Name.IsNull("22")
argsIndex = 1;
if (firstArgs.Type.Name.Contains("LambdaQueryJoin"))
{
isLambdaQueryJoinExt = true;
}
}
else
{
firstArgs = mcExp.Object;//like b.Id.ToString()
}
#region 缓存处理 效率并不高
//MethodCallExpressionCacheItem methodCache;
//string key = "";
//if (SettingConfig.UseLambdaCache&& false)
//{
// key = __PrefixsAllKey + mcExp + nodeType;
// var exists = MethodCallExpressionCache.TryGetValue(key, out methodCache);
// if (exists)
// {
// if (!methodCache.isConstantMethod)
// {
// var methodCall = methodCache.CRLExpression.Data as CRLExpression.MethodCallObj;
// if (methodCall.Args.Count > 0)
// {
// for (int i = argsIndex; i < allArguments.Count; i++)
// {
// bool isConstant1;
// var obj = GetParameExpressionValue(allArguments[i], out isConstant1);
// arguments.Add(obj);
// }
// methodCall.Args = arguments;
// }
// }
// methodCache.CRLExpression.SqlOut = "";
// return methodCache.CRLExpression;
// }
//}
#endregion
#region MethodCallExpression
//bool isConstantMethod = false;
MemberExpression memberExpression;
string methodField = "";
string memberName = "";
string methodName = mcExp.Method.Name;
if (firstArgs is ParameterExpression || isLambdaQueryJoinExt)
{
var exp2 = mcExp.Arguments[1] as UnaryExpression;
var type = exp2.Operand.GetType();
var p = type.GetProperty("Body");
var exp3 = p.GetValue(exp2.Operand, null) as Expression;
methodField = RouteExpressionHandler(exp3).SqlOut;
memberName = "";
}
else if (firstArgs is UnaryExpression)//like a.Code.Count()
{
memberExpression = (firstArgs as UnaryExpression).Operand as MemberExpression;
memberName = memberExpression.Member.Name;
var field = TypeCache.GetProperties(memberExpression.Expression.Type, true)[memberName];
memberName = __DBAdapter.FieldNameFormat(field);
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
}
else if (firstArgs is BinaryExpression)
{
var be = firstArgs as BinaryExpression;
methodField = BinaryExpressionHandler(be.Left, be.Right, be.NodeType).Data.ToString();
}
else if (firstArgs is MemberExpression)
{
//like a.Code
memberExpression = firstArgs as MemberExpression;
memberName = memberExpression.Member.Name;
var type = memberExpression.Expression.Type;
if (type.IsSubclassOf(typeof(IModel)))
{
var field = TypeCache.GetProperties(type, true)[memberExpression.Member.Name];
memberName = __DBAdapter.FieldNameFormat(field);
}
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
methodField = FormatFieldPrefix(memberExpression.Expression.Type, memberName);
//var allConstant = true;
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj);
}
}
else
{
//like Convert.ToDateTime(times)
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
for (int i = argsIndex; i < allArguments.Count; i++)
{
bool isConstant2;
var obj2 = GetParameExpressionValue(allArguments[i], out isConstant2);
arguments.Add(obj2);
}
}
}
else if (firstArgs is ConstantExpression)//按常量
{
//like DateTime.Parse("2016-02-11 12:56"),
//isConstantMethod = true;
var obj = ConstantValueVisitor.GetParameExpressionValue(firstArgs);
arguments.Add(obj);
}
//else
//{
// throw new CRLException("不支持此语法解析:" + args);
//}
if (nodeType == null)
{
nodeType = ExpressionType.Equal;
}
if (string.IsNullOrEmpty(methodField))
{
//当是常量转换方法
var method = mcExp.Method;
object obj;
if (mcExp.Method.IsStatic)//like DateTime.Parse("2016-02-11")
{
obj = method.Invoke(null, arguments.ToArray());
}
else//like time.AddDays(1)
{
if (arguments.Count == 0)
{
throw new Exception("未能解析" + exp);
}
var args1 = arguments.First();
arguments.RemoveAt(0);
obj = method.Invoke(args1, arguments.ToArray());
}
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj
};
//var cache = new MethodCallExpressionCacheItem() { CRLExpression = exp2, argsIndex = argsIndex, isConstantMethod = isConstantMethod, isStatic = mcExp.Method.IsStatic };
//MethodCallExpressionCache[key] = cache;
return(exp2);
}
var methodInfo = new CRLExpression.MethodCallObj()
{
Args = arguments, ExpressionType = nodeType.Value, MemberName = memberName, MethodName = methodName, MemberQueryName = methodField
};
methodInfo.ReturnType = mcExp.Type;
#endregion
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.MethodCall, Data = methodInfo
};
//if (SettingConfig.UseLambdaCache && false)
//{
// var cache2 = new MethodCallExpressionCacheItem() { CRLExpression = exp4, argsIndex = argsIndex, isConstantMethod = isConstantMethod };
// MethodCallExpressionCache[key] = cache2;
//}
return(exp4);
#endregion
}
CRLExpression.CRLExpression MemberExpressionHandler(Expression exp, ExpressionType?nodeType = null, bool firstLevel = false)
{
#region MemberExpression
//区分 属性表达带替换符{0} 变量值不带
MemberExpression mExp = (MemberExpression)exp;
if (mExp.Expression != null && mExp.Expression.NodeType == ExpressionType.Parameter) //like b.Name==b.Name1 或b.Name
{
#region MemberParameter
var memberName = mExp.Member.Name;
var type = mExp.Expression.Type;
if (mExp.Member.ReflectedType.Name.StartsWith("<>f__AnonymousType"))//按匿名类
{
var exp2 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = memberName, MemberType = type
};
return(exp2);
}
if (firstLevel)//没有运算符的BOOL判断
{
var exp2 = exp.Equal(Expression.Constant(true));
return(RouteExpressionHandler(exp2));
}
CRL.Attribute.FieldInnerAttribute field;
var a = TypeCache.GetProperties(type, true).TryGetValue(memberName, out field);
if (!a)
{
throw new Exception("类型 " + type.Name + "." + memberName + " 未设置Mapping,请检查查询条件");
}
if (field.DefaultCRLExpression != null)
{
var c2 = field.DefaultCRLExpression;
c2.Data = __DBAdapter.FieldNameFormat(field);
return(c2);
}
var fieldStr = __DBAdapter.FieldNameFormat(field);
var exp3 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Name, Data = fieldStr, Data_ = field.MapingName, MemberType = type
};
field.DefaultCRLExpression = exp3;
return(exp3);
#endregion
}
else
{
#region 值
bool isConstant;
var obj = GetParameExpressionValue(mExp, out isConstant);
if (obj is Enum)
{
obj = (int)obj;
}
else if (obj is Boolean)//sql2000需要转换
{
obj = Convert.ToInt32(obj);
}
var exp4 = new CRLExpression.CRLExpression()
{
Type = CRLExpression.CRLExpressionType.Value, Data = obj, IsConstantValue = isConstant
};
//if (isConstant)
//{
// MemberExpressionCache[key] = exp4;
//}
return(exp4);
#endregion
}
#endregion
}
CRLExpression.CRLExpression BinaryExpressionHandler(Expression left, Expression right, ExpressionType expType)
{
var isBinary = binaryTypes.Contains(expType);
string key = "";
string typeStr = ExpressionTypeCast(expType);
string __typeStr2 = typeStr;
string outLeft, outRight;
bool isNullValue = false;
//isBinary = false;
if (isBinary)
{
#region 二元运算缓存
CRLExpression.CRLExpression cacheItem;
key = string.Format("{0}{1}{2}{3}", __PrefixsAllKey, left, expType, right);
var a = BinaryExpressionCache.TryGetValue(key, out cacheItem);
if (a)
{
outLeft = DealCRLExpression(left, cacheItem.Left, typeStr, out isNullValue);
outRight = DealCRLExpression(right, cacheItem.Right, typeStr, out isNullValue);
if (isNullValue)//left为null则语法错误
{
__typeStr2 = "";
}
cacheItem.SqlOut = string.Format("({0}{1}{2})", outLeft, __typeStr2, outRight);
cacheItem.Data = cacheItem.SqlOut;
return(cacheItem);
}
#endregion
}
StringBuilder sb = new StringBuilder();
var leftPar = RouteExpressionHandler(left);
var rightPar = RouteExpressionHandler(right);
#region 修正bool值一元运算
//b => b.IsTop && b.Id < 10
if (expType == ExpressionType.AndAlso || expType == ExpressionType.OrElse)
{
if (leftPar.Type == CRLExpression.CRLExpressionType.Name)
{
left = left.Equal(Expression.Constant(true));
leftPar = RouteExpressionHandler(left);
}
else if (rightPar.Type == CRLExpression.CRLExpressionType.Name)
{
right = right.Equal(Expression.Constant(true));
rightPar = RouteExpressionHandler(right);
}
}
#endregion
outLeft = DealCRLExpression(left, leftPar, typeStr, out isNullValue, true);
outRight = DealCRLExpression(right, rightPar, typeStr, out isNullValue, true);
if (isNullValue)//left为null则语法错误
{
__typeStr2 = "";
}
sb.AppendFormat("({0}{1}{2})", outLeft, __typeStr2, outRight);
var e = new CRLExpression.CRLExpression()
{
ExpType = expType.ToString(), Left = leftPar, Right = rightPar, Type = isBinary ? CRLExpression.CRLExpressionType.Binary : CRLExpression.CRLExpressionType.Tree
};
e.SqlOut = sb.ToString();
e.Data = e.SqlOut;
if (isBinary)
{
BinaryExpressionCache[key] = e;
}
return(e);
}