/*
* Select clause
* Get all property name (as column name) with attribute Showable is true
*/
public void GetSelectClauses <T>(T obj, SelectClauses select)
{
if (obj == null || select == null)
{
throw new ArgumentNullException("Null parameter.");
}
foreach (PropertyInfo prop in obj.GetType().GetProperties())
{
foreach (DBAttributes attr in
prop.GetCustomAttributes <DBAttributes>(false).Where(el => el.Showable || el.JoinClass != null))
{
if (attr.Showable)
{
select.Add(GetAlias(obj), prop.Name);
}
else if (attr.JoinClass != null)
{
if (!_alias.ContainsKey(attr.JoinClass))
{
GetSelectClauses(Activator.CreateInstance(
Type.GetType(
obj.GetType().Namespace + "." + attr.JoinClass)
), select);
}
}
}
}
}
//demo of sqlbuilder
static void Main(string[] args)
{
P p = new P();
DBBase db = new DBBase();
QueryClauses q = new QueryClauses();
OrderByClauses o = new OrderByClauses();
DBBase.GetQueryClauses("q0=age,eq,&q1=sex,eq,1&q2=age,lt,30&q3=sex,in,1,2,3,4&q4=id,eq,a001&orderby=sex,asc,age,desc", q, o);
SelectClauses s = new SelectClauses();
db.GetSelectClauses(p, s);
JoinClauses j = new JoinClauses();
db.GetJoinClauses(p, j);
WhereClauses w = new WhereClauses();
db.GetWhereClauses(p, q, w);
db.GetOrderByClauses(p, o);
SQLClause sql = new SQLClause(s,
db.GetFromClause(p),
j, w, o);
Trace.WriteLine(sql.ToString());
}
