public static TreeExpression Compile <T>(SQLInfo <T> sql, Expression Expr)
{
var ret = new TreeExpression();
if (Expr is BinaryExpression)
{
ret.Op = Utils.GetOp(Expr.NodeType);
ret.Left = Compile(sql, ((BinaryExpression)Expr).Left);
ret.Right = Compile(sql, ((BinaryExpression)Expr).Right);
return(ret);
}
if (Expr is MemberExpression)
{
return(ComplieWithMemberExpression(sql, (MemberExpression)Expr));
}
if (Expr is ConstantExpression)
{
return(CompileWitConstantEpxression(sql, (ConstantExpression)Expr));
}
if (Expr is UnaryExpression)
{
return(Compile(sql, ((UnaryExpression)Expr).Operand));
}
throw new NotImplementedException();
}
private static string GetTextField <T>(SQLInfo <T> sql, TreeExpression expr, string quote)
{
if (expr.Op != null)
{
return("(" + GetTextField(sql, expr.Left, quote) + ")" + expr.Op + "(" + GetTextField(sql, expr.Right, quote) + ")");
}
if (expr.Field != null)
{
return(GetTextField(sql, expr.Field, quote));
}
if (expr.Value != null)
{
if (sql.Params == null)
{
sql.Params = new List <FieldValue>();
}
sql.Params.Add(expr.Value);
return("{" + (sql.Params.Count - 1) + "}");
}
throw new NotImplementedException();
}
//[System.Diagnostics.DebuggerStepThrough]
private static TreeExpression GetExpression <T>(
SQLInfo <T> sql,
List <DataFieldInfo> fields1,
List <DataFieldInfo> fields2,
ParameterExpression pExpr1,
ParameterExpression pExpr2,
string alias1,
string alias2,
Expression Expr)
{
var ret = new TreeExpression();
if (Expr is UnaryExpression)
{
return(GetExpression(sql, fields1, fields2, pExpr1, pExpr2, alias1, alias2, ((UnaryExpression)Expr).Operand));
}
if (Expr is MemberExpression)
{
return(GetExpressionInMemberExpression(sql, fields1, fields2, pExpr1, pExpr2, alias1, alias2, (MemberExpression)Expr));
}
return(ret);
}