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 preprocess(String token, QueryTranslatorImpl q) throws QueryException {
// ugly hack for cases like "elements(foo.bar.collection)"
// (multi-part path expression ending in elements or indices)
String[] tokens = StringHelper.split(".", token, true);
if (tokens.length > 5
&& (CollectionPropertyNames.COLLECTION_ELEMENTS.equals(tokens[tokens.length - 1])
|| CollectionPropertyNames.COLLECTION_INDICES.equals(tokens[tokens.length - 1]))) {
pathExpressionParser.start(q);
for (int i = 0; i < tokens.length - 3; i++) {
pathExpressionParser.token(tokens[i], q);
}
pathExpressionParser.token(null, q);
pathExpressionParser.end(q);
addJoin(pathExpressionParser.getWhereJoin(), q);
pathExpressionParser.ignoreInitialJoin();
}
}