/// <summary>
///
/// </summary>
/// <param name="q"></param>
/// <returns></returns>
public string AddFromCollection(QueryTranslator q)
{
IType collectionElementType = PropertyType;
if (collectionElementType == null)
{
throw new QueryException(
string.Format("must specify 'elements' for collection valued property in from clause: {0}", path));
}
if (collectionElementType.IsEntityType)
{
// an association
IQueryableCollection collectionPersister = q.GetCollectionPersister(collectionRole);
IQueryable entityPersister = (IQueryable) collectionPersister.ElementPersister;
string clazz = entityPersister.EntityName;
string elementName;
if (collectionPersister.IsOneToMany)
{
elementName = collectionName;
// allow index() function
q.DecoratePropertyMapping(elementName, collectionPersister);
}
else
{
// many to many
q.AddCollection(collectionName, collectionRole);
elementName = q.CreateNameFor(clazz);
AddJoin(elementName, (IAssociationType) collectionElementType);
}
q.AddFrom(elementName, clazz, joinSequence);
currentPropertyMapping = new CollectionPropertyMapping(collectionPersister);
return elementName;
}
// collection of values
q.AddFromCollection(collectionName, collectionRole, joinSequence);
return collectionName;
}
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))
{
q.AddNamedParameter(token.Substring(1));
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))
{
q.AddNamedParameter(token.Substring(1));
q.AppendScalarSelectParameter();
}
else
throw;
}
readyForAliasOrExpression = false;
}
}
private void PrepareForIndex(QueryTranslator q)
{
IQueryableCollection collPersister = q.GetCollectionPersister(collectionRole);
if (!collPersister.HasIndex)
{
throw new QueryException("unindexed collection before []");
}
string[] indexCols = collPersister.IndexColumnNames;
if (indexCols.Length != 1)
{
throw new QueryException("composite-index appears in []: " + path);
}
JoinSequence fromJoins = new JoinSequence(q.Factory)
.SetUseThetaStyle(useThetaStyleJoin)
.SetRoot(collPersister, collectionName)
.SetNext(joinSequence.Copy());
if (!continuation)
{
AddJoin(collectionName, collPersister.CollectionType);
}
joinSequence.AddCondition(new SqlString(collectionName + '.' + indexCols[0] + " = "));
CollectionElement elem = new CollectionElement();
elem.ElementColumns = collPersister.GetElementColumnNames(collectionName);
elem.Type = collPersister.ElementType;
elem.IsOneToMany = collPersister.IsOneToMany;
elem.Alias = collectionName;
elem.JoinSequence = joinSequence;
collectionElements.Add(elem); //addlast
SetExpectingCollectionIndex();
q.AddCollection(collectionName, collectionRole);
q.AddJoin(collectionName, fromJoins);
}
/// <summary>
///
/// </summary>
/// <param name="token"></param>
/// <param name="q"></param>
public void Token(string token, QueryTranslator q)
{
string lctoken = token.ToLower(CultureInfo.InvariantCulture);
if (first)
{
first = false;
if (lctoken.Equals("distinct"))
{
q.Distinct = true;
return;
}
else if (lctoken.Equals("all"))
{
q.Distinct = false;
return;
}
}
if (afterNew)
{
afterNew = false;
holderClass = SessionFactoryHelper.GetImportedClass(q.Factory, token);
if (holderClass == null)
{
throw new QueryException("class not found: " + token);
}
q.HolderClass = holderClass;
insideNew = true;
}
else if (token.Equals(StringHelper.Comma))
{
if (ready)
{
throw new QueryException("alias or expression expected in SELECT");
}
q.AppendScalarSelectToken(StringHelper.CommaSpace);
ready = true;
}
else if ("new".Equals(lctoken))
{
afterNew = true;
ready = false;
}
else if (StringHelper.OpenParen.Equals(token))
{
if (!aggregate && holderClass != null && !ready)
{
//opening paren in new Foo ( ... )
ready = true;
}
else if (aggregate)
{
q.AppendScalarSelectToken(token);
}
else
{
throw new QueryException("aggregate function expected before ( in SELECT");
}
ready = true;
}
else if (StringHelper.ClosedParen.Equals(token))
{
if (insideNew && !aggregate && !ready)
{
//if we are inside a new Result(), but not inside a nested function
insideNew = false;
}
else if (aggregate && ready)
{
q.AppendScalarSelectToken(token);
aggregateFuncTokenList.RemoveAt(0);
if (aggregateFuncTokenList.Count < 1)
{
aggregate = false;
ready = false;
}
}
else
{
throw new QueryException("( expected before ) in select");
}
}
else if (countArguments.Contains(lctoken))
{
if (!ready || !aggregate)
{
throw new QueryException(token + " only allowed inside aggregate function in SELECT");
}
q.AppendScalarSelectToken(token);
if ("*".Equals(token) && !afterAggregatePath)
{
q.AddSelectScalar(GetFunction("count", q).ReturnType(NHibernateUtil.Int64, q.Factory));
} //special case
afterAggregatePath = false;
}
else if (GetFunction(lctoken, q) != null && token == q.Unalias(token))
{
// the name of an SQL function
if (!ready)
{
throw new QueryException(", expected before aggregate function in SELECT: " + token);
}
aggregate = true;
afterAggregatePath = false;
aggregateAddSelectScalar = true;
aggregateFuncTokenList.Insert(0, lctoken);
ready = false;
q.AppendScalarSelectToken(token);
if (!AggregateHasArgs(lctoken, q))
{
q.AddSelectScalar(AggregateType(aggregateFuncTokenList, null, q));
if (!AggregateFuncNoArgsHasParenthesis(lctoken, q))
{
aggregateFuncTokenList.RemoveAt(0);
if (aggregateFuncTokenList.Count < 1)
{
aggregate = false;
ready = false;
}
else
{
ready = true;
}
}
}
}
else if (aggregate)
{
bool constantToken = false;
if (!ready)
{
throw new QueryException("( expected after aggregate function in SELECT");
}
try
{
ParserHelper.Parse(aggregatePathExpressionParser, q.Unalias(token), ParserHelper.PathSeparators, q);
}
catch (QueryException)
{
constantToken = true;
}
afterAggregatePath = true;
if (constantToken)
{
q.AppendScalarSelectToken(token);
}
else
{
if (aggregatePathExpressionParser.IsCollectionValued)
{
q.AddCollection(
aggregatePathExpressionParser.CollectionName,
aggregatePathExpressionParser.CollectionRole);
}
q.AppendScalarSelectToken(aggregatePathExpressionParser.WhereColumn);
if (aggregateAddSelectScalar)
{
q.AddSelectScalar(AggregateType(aggregateFuncTokenList, aggregatePathExpressionParser.WhereColumnType, q));
aggregateAddSelectScalar = false;
}
aggregatePathExpressionParser.AddAssociation(q);
}
}
else
{
if (!ready)
{
throw new QueryException(", expected in SELECT");
}
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);
ready = false;
}
}
