/// <summary>Expresión lógica que permite uso de OR y agrega comillas en caso de ser requeridas</summary>
public static Expression WhereVal(dbCom comp, Expression val, params string[] values)
{
Expression[] quotedValues = values.Select(v => (Expression)AddSingleQuotesIfMissing(v)).ToArray();
Comparison whr = Log(dbLog.Where, comp, val, quotedValues);
return(new Expression(dbLog.Where, whr));
}
/// <summary>Or para expresión lógica agregando comillas en caso de ser requeridas</summary>
public Expression OrVal(dbCom comp, Expression val, params string[] values)
{
Expression[] quotedValues = values.Select(v => (Expression)AddSingleQuotesIfMissing(v)).ToArray();
Comparison whr = Log(dbLog.And, comp, val, quotedValues);
return(this.Operate(dbLog.Or, whr));
}
private static Comparison Log(dbLog log, dbCom comp, Expression val, params Expression[] values)
{
Comparison whr = new Comparison();
whr.comparator = val.ToString();
whr.type = comp;
whr.values = values.Select(v => v.ToString()).ToList();
return(whr);
}
/// <summary>Agrega una condicion al listado de condiciones de agrupacion</summary>
public Query Having(dbCom oper, Expression comp1, params Expression[] comp2)
{
Comparison whr = new Comparison();
whr.comparator = comp1.ToString();
whr.type = oper;
whr.values = comp2.Select(c => c.ToString()).ToList();
curUnion.lstHaving.Add(whr);
return(this);
}
/// <summary>Agrega una o varias condiciones al listado de condiciones</summary>
public Query Where(dbCom comp, Expression val, params Expression[] values)
{
Comparison whr = new Comparison();
whr.comparator = val.ToString();
whr.type = comp;
whr.values = values.Select(v => v.ToString()).ToList();
curUnion.lstWhere.Add(whr);
return(this);
}
/// <summary>Agrega una condicion de union para las tablas</summary>
public Query JoinOn(dbCom comp, Expression value1, params Expression[] values)
{
Comparison whr = new Comparison();
whr.comparator = value1.ToString();
whr.type = comp;
whr.values = values.Select(v => v.ToString()).ToList();
whr.owner = curUnion.lstFrom.Last().tableAlias;
curUnion.lstJoinOn.Add(whr);
return(this);
}
/// <summary>Devuelve los caracteres específicos para la comparación de base de datos</summary>
private string dbComToString(dbCom Com)
{
switch (Com)
{
case dbCom.Equals:
return("=");
case dbCom.MoreThan:
return(">");
case dbCom.LessThan:
return("<");
case dbCom.MoreThanOrEquals:
return(">=");
case dbCom.LessThanOrEquals:
return("<=");
case dbCom.DifferentFrom:
return("<>");
case dbCom.Iss:
return("IS");
case dbCom.IssNot:
return("IS NOT");
case dbCom.IssIn:
return("IN");
case dbCom.IssNotIn:
return("NOT IN");
case dbCom.Like:
return("LIKE");
case dbCom.NotLike:
return("NOT LIKE");
}
return("");
}
/// <summary>Or para expresión lógica</summary>
public Expression Or(dbCom comp, Expression val, params Expression[] values)
{
Comparison whr = Log(dbLog.And, comp, val, values);
return(this.Operate(dbLog.Or, whr));
}
/// <summary>Expresión lógica que permite uso de OR</summary>
public static Expression Where(dbCom comp, Expression val, params Expression[] values)
{
Comparison whr = Log(dbLog.Where, comp, val, values);
return(new Expression(dbLog.Where, whr));
}
/// <summary>Agrega una condicion a valor al listado de condiciones</summary>
public Query WhereVal(dbCom comp, Expression val, params string[] values)
{
Expression[] expr = values.Select(s => (Expression)(AddSingleQuotesIfMissing(s))).ToArray();
return(Where(comp, val, expr));
}
/// <summary>Agrega una o varias condiciones al listado de condiciones</summary>
public Query Where(dbCom comp, Expression val, params int[] values)
{
return(Where(comp, val, values.Select(v => (Expression)v).ToArray()));
}
/// <summary>Agrega una o varias condiciones envasadas al listado de condiciones</summary>
public Query Where(dbCom comp, Expression val, params object[] values)
{
return(Where(comp, val, values.Select(v => ObjectToExpression(v)).ToArray()));
}
/// <summary>Agrega una condicion de union a valor para las tablas</summary>
public Query JoinOnVal(dbCom comp, string value1, params string[] values)
{
Expression[] expr = values.Select(s => (Expression)(AddSingleQuotesIfMissing(s))).ToArray();
return(JoinOn(dbCom.Equals, value1, expr));
}
