public void Token(string token, QueryTranslator q)
{
SessionFactoryHelper helper = new SessionFactoryHelper(q.Factory);
string lctoken = token.ToLowerInvariant();
if (first)
{
first = false;
if ("distinct".Equals(lctoken))
{
q.Distinct = true;
return;
}
else if ("all".Equals(lctoken))
{
q.Distinct = false;
return;
}
}
if (afterNew)
{
afterNew = false;
holderClass = helper.GetImportedClass(token);
if (holderClass == null)
{
throw new QueryException("class not found: " + token);
}
q.HolderClass = holderClass;
insideNew = true;
}
else if (token.Equals(StringHelper.Comma))
{
if (readyForAliasOrExpression)
{
throw new QueryException("alias or expression expected in SELECT");
}
q.AppendScalarSelectToken(StringHelper.CommaSpace);
readyForAliasOrExpression = true;
}
else if ("new".Equals(lctoken))
{
afterNew = true;
readyForAliasOrExpression = false;
}
else if (StringHelper.OpenParen.Equals(token))
{
parenCount++;
if (!funcStack.HasFunctions && holderClass != null && !readyForAliasOrExpression)
{
//opening paren in new Foo ( ... )
readyForAliasOrExpression = true;
}
else if (funcStack.HasFunctions)
{
q.AppendScalarSelectToken(token);
}
else
{
throw new QueryException("HQL function expected before '(' in SELECT clause.");
}
readyForAliasOrExpression = true;
}
else if (StringHelper.ClosedParen.Equals(token))
{
parenCount--;
if (parenCount < 0)
{
throw new QueryException("'(' expected before ')' in SELECT clause.");
}
if (insideNew && !funcStack.HasFunctions && !readyForAliasOrExpression)
{
//if we are inside a new Result(), but not inside a nested function
insideNew = false;
}
else if (funcStack.HasFunctions)
{
q.AppendScalarSelectToken(token);
IType scalarType = funcStack.GetReturnType();
funcStack.Pop();
// Can't have an alias or expression right after the closing parenthesis of a function call.
readyForAliasOrExpression = false;
// if all functions were parsed add the type of the first function in stack
if (!funcStack.HasFunctions)
{
q.AddSelectScalar(scalarType);
}
}
}
else if (IsHQLFunction(lctoken, q) && token == q.Unalias(token))
{
if (!readyForAliasOrExpression && !funcStack.HasFunctions)
{
// The syntax control inside a functions is delegated to the render
throw new QueryException("',' expected before function in SELECT: " + token);
}
if (funcStack.HasFunctions && funcStack.FunctionGrammar.IsKnownArgument(lctoken))
{
// Some function, like extract, may have KnownArgument with the same name of another function
q.AppendScalarSelectToken(token);
}
else
{
// Is a nested function
funcStack.Push(GetFunction(lctoken, q));
q.AppendScalarSelectToken(token);
if (!funcStack.SqlFunction.HasArguments && !funcStack.SqlFunction.HasParenthesesIfNoArguments)
{
q.AddSelectScalar(funcStack.GetReturnType());
funcStack.Pop();
readyForAliasOrExpression = funcStack.HasFunctions;
}
}
}
else if (funcStack.HasFunctions)
{
bool constantToken = false;
var expectedParen = parenCount + ((insideNew) ? -1 : 0);
if (!readyForAliasOrExpression && expectedParen != funcStack.NestedFunctionCount)
{
throw new QueryException("'(' expected after HQL function in SELECT");
}
try
{
ParserHelper.Parse(funcStack.PathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
}
catch (QueryException)
{
if (IsPathExpression(token))
{
throw;
}
// If isn't a path the token is added like part of function arguments
constantToken = true;
}
if (token.StartsWith(ParserHelper.HqlVariablePrefix))
{
string name = token.Substring(1);
q.AppendScalarSelectParameter(name);
}
else if (token.Equals(StringHelper.SqlParameter))
{
q.AppendScalarSelectParameter();
}
else if (constantToken)
{
q.AppendScalarSelectToken(token);
}
else
{
if (funcStack.PathExpressionParser.IsCollectionValued)
{
q.AddCollection(
funcStack.PathExpressionParser.CollectionName,
funcStack.PathExpressionParser.CollectionRole);
}
q.AppendScalarSelectToken(funcStack.PathExpressionParser.WhereColumn);
funcStack.PathExpressionParser.AddAssociation(q);
}
// after a function argument
readyForAliasOrExpression = false;
}
else
{
if (!readyForAliasOrExpression)
{
throw new QueryException("',' expected in SELECT before:" + token);
}
try
{
//High probablly to find a valid pathExpression
ParserHelper.Parse(pathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
if (pathExpressionParser.IsCollectionValued)
{
q.AddCollection(
pathExpressionParser.CollectionName,
pathExpressionParser.CollectionRole);
}
else if (pathExpressionParser.WhereColumnType.IsEntityType)
{
q.AddSelectClass(pathExpressionParser.SelectName);
}
q.AppendScalarSelectTokens(pathExpressionParser.WhereColumns);
q.AddSelectScalar(pathExpressionParser.WhereColumnType);
pathExpressionParser.AddAssociation(q);
}
catch (QueryException)
{
// Accept costants in SELECT: NH-280
// TODO: Parse a costant expression like 5+3+8 (now is not supported in SELECT)
if (IsStringCostant(token))
{
q.AppendScalarSelectToken(token);
q.AddSelectScalar(NHibernateUtil.String);
}
else if (IsIntegerConstant(token))
{
q.AppendScalarSelectToken(token);
q.AddSelectScalar(GetIntegerConstantType(token));
}
else if (IsFloatingPointConstant(token))
{
q.AppendScalarSelectToken(token);
q.AddSelectScalar(GetFloatingPointConstantType());
}
else if (token.StartsWith(ParserHelper.HqlVariablePrefix))
{
string name = token.Substring(1);
q.AppendScalarSelectParameter(name);
}
else if (token.Equals(StringHelper.SqlParameter))
{
q.AppendScalarSelectParameter();
}
else
{
throw;
}
}
readyForAliasOrExpression = false;
}
}