private static object ParseWherePredicate(Bamboo.Query.Query.TokenReader tokenReader, string from)
{
if (tokenReader.Peek().Equals("("))
{
tokenReader.Next();
return(ParseCompoundPredicate(tokenReader, from));
}
System.Collections.ArrayList tokens = new System.Collections.ArrayList();
//TODO this needs work.
string token;
while ((token = tokenReader.Peek()) != null)
{
if (token.Equals("AND"))
{
break;
}
else if (token.Equals("OR"))
{
break;
}
else
{
tokenReader.Next();
tokens.Add(token);
}
}
return(ParseWherePredicate(tokens, from));
}
private static Bamboo.Query.Query.WhereClause GetWhere(System.Collections.ArrayList tokens, string from)
{
object predicate = null;
Bamboo.Query.Query.TokenReader tokenReader = new Bamboo.Query.Query.TokenReader(tokens);
string token;
while ((token = tokenReader.Peek()) != null)
{
switch (token)
{
case "AND":
{
tokenReader.Next();
if (predicate == null)
{
throw new System.Exception("Invalid query.");
}
predicate = new Bamboo.Query.Query.AndPredicate(predicate, ParseWherePredicate(tokenReader, from));
break;
}
case "OR":
{
tokenReader.Next();
if (predicate == null)
{
throw new System.Exception("Invalid query.");
}
predicate = new Bamboo.Query.Query.OrPredicate(predicate, ParseWherePredicate(tokenReader, from));
break;
}
default:
{
if (predicate != null)
{
throw new System.Exception("Invalid query.");
}
predicate = ParseWherePredicate(tokenReader, from);
break;
}
}
}
if (predicate == null)
{
return(null);
}
return(new Bamboo.Query.Query.WhereClause(predicate));
}
private static object ParseCompoundPredicate(Bamboo.Query.Query.TokenReader tokenReader, string from)
{
object predicate = null;
string token;
while ((token = tokenReader.Peek()) != null)
{
switch (token)
{
case ")":
{
tokenReader.Next();
return(predicate);
}
case "AND":
{
tokenReader.Next();
if (predicate == null)
{
throw new System.Exception("Invalid query.");
}
predicate = new Bamboo.Query.Query.AndPredicate(predicate, ParseWherePredicate(tokenReader, from));
break;
}
case "OR":
{
tokenReader.Next();
if (predicate == null)
{
throw new System.Exception("Invalid query.");
}
predicate = new Bamboo.Query.Query.OrPredicate(predicate, ParseWherePredicate(tokenReader, from));
break;
}
default:
{
if (predicate != null)
{
throw new System.Exception("Invalid query.");
}
predicate = ParseWherePredicate(tokenReader, from);
break;
}
}
}
if (predicate != null)
{
return(predicate);
}
throw new System.Exception("Invalid query.");
}