private void doPathExpression(String token, QueryTranslatorImpl q) throws QueryException {
preprocess(token, q);
StringTokenizer tokens = new StringTokenizer(token, ".", true);
pathExpressionParser.start(q);
while (tokens.hasMoreTokens()) {
pathExpressionParser.token(tokens.nextToken(), q);
}
pathExpressionParser.end(q);
if (pathExpressionParser.isCollectionValued()) {
openExpression(q, "");
appendToken(q, pathExpressionParser.getCollectionSubquery(q.getEnabledFilters()));
closeExpression(q, "");
// this is ugly here, but needed because its a subquery
q.addQuerySpaces(
q.getCollectionPersister(pathExpressionParser.getCollectionRole()).getCollectionSpaces());
} else {
if (pathExpressionParser.isExpectingCollectionIndex()) {
expectingIndex++;
} else {
addJoin(pathExpressionParser.getWhereJoin(), q);
appendToken(q, pathExpressionParser.getWhereColumn());
}
}
}
private void prepareForIndex(QueryTranslatorImpl q) throws QueryException {
QueryableCollection collPersister = q.getCollectionPersister(collectionRole);
if (!collPersister.hasIndex())
throw new QueryException("unindexed collection before []: " + path);
String[] indexCols = collPersister.getIndexColumnNames();
if (indexCols.length != 1) throw new QueryException("composite-index appears in []: " + path);
// String[] keyCols = collPersister.getKeyColumnNames();
JoinSequence fromJoins =
new JoinSequence(q.getFactory())
.setUseThetaStyle(useThetaStyleJoin)
.setRoot(collPersister, collectionName)
.setNext(joinSequence.copy());
if (!continuation) addJoin(collectionName, collPersister.getCollectionType());
joinSequence.addCondition(
collectionName + '.' + indexCols[0] + " = "); // TODO: get SQL rendering out of here
CollectionElement elem = new CollectionElement();
elem.elementColumns = collPersister.getElementColumnNames(collectionName);
elem.elementType = collPersister.getElementType();
elem.isOneToMany = collPersister.isOneToMany();
elem.alias = collectionName;
elem.joinSequence = joinSequence;
collectionElements.addLast(elem);
setExpectingCollectionIndex();
q.addCollection(collectionName, collectionRole);
q.addFromJoinOnly(collectionName, fromJoins);
}
public String addFromCollection(QueryTranslatorImpl q) throws QueryException {
Type collectionElementType = getPropertyType();
if (collectionElementType == null) {
throw new QueryException(
"must specify 'elements' for collection valued property in from clause: " + path);
}
if (collectionElementType.isEntityType()) {
// an association
QueryableCollection collectionPersister = q.getCollectionPersister(collectionRole);
Queryable entityPersister = (Queryable) collectionPersister.getElementPersister();
String clazz = entityPersister.getEntityName();
final 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, (AssociationType) collectionElementType);
}
q.addFrom(elementName, clazz, joinSequence);
currentPropertyMapping = new CollectionPropertyMapping(collectionPersister);
return elementName;
} else {
// collections of values
q.addFromCollection(collectionName, collectionRole, joinSequence);
return collectionName;
}
}
private void dereferenceCollection(String propertyName, String role, QueryTranslatorImpl q)
throws QueryException {
collectionRole = role;
QueryableCollection collPersister = q.getCollectionPersister(role);
String name = q.createNameForCollection(role);
addJoin(name, collPersister.getCollectionType());
// if ( collPersister.hasWhere() ) join.addCondition( collPersister.getSQLWhereString(name) );
collectionName = name;
collectionOwnerName = currentName;
currentName = name;
currentProperty = propertyName;
componentPath.setLength(0);
currentPropertyMapping = new CollectionPropertyMapping(collPersister);
}
