/// <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;
}
private void DereferenceCollection(String propertyName, String role, QueryTranslator q)
{
collectionRole = role;
IQueryableCollection collPersister = q.GetCollectionPersister(role);
string name = q.CreateNameForCollection(role);
AddJoin(name, collPersister.CollectionType);
//if ( collPersister.HasWhere )
//{
// join.AddCondition( collPersister.GetSQLWhereString( name ) );
//}
collectionName = name;
collectionOwnerName = currentName;
currentName = name;
currentProperty = propertyName;
componentPath.Length = 0;
//componentPath = new StringBuilder();
currentPropertyMapping = new CollectionPropertyMapping(collPersister);
}
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);
}
private void DoPathExpression(string token, QueryTranslator q)
{
Preprocess(token, q);
StringTokenizer tokens = new StringTokenizer(token, ".", true);
pathExpressionParser.Start(q);
foreach (string tok in tokens)
{
pathExpressionParser.Token(tok, q);
}
pathExpressionParser.End(q);
if (pathExpressionParser.IsCollectionValued)
{
OpenExpression(q, string.Empty);
AppendToken(q, pathExpressionParser.GetCollectionSubquery(q.EnabledFilters));
CloseExpression(q, string.Empty);
// this is ugly here, but needed because its a subquery
q.AddQuerySpaces(q.GetCollectionPersister(pathExpressionParser.CollectionRole).CollectionSpaces);
}
else
{
if (pathExpressionParser.IsExpectingCollectionIndex)
{
expectingIndex++;
}
else
{
AddJoin(pathExpressionParser.WhereJoin, q);
AppendToken(q, pathExpressionParser.WhereColumn);
}
}
}
