}
}
}
public void processJoins(QueryNode query) {
final FromClause fromClause = query.getFromClause();
final List fromElements;
if ( DotNode.useThetaStyleImplicitJoins ) {
// for regression testing against output from the old parser...
// found it easiest to simply reorder the FromElements here into ascending order
// in terms of injecting them into the resulting sql ast in orders relative to those
// expected by the old parser; this is definitely another of those "only needed
// for regression purposes". The SyntheticAndFactory, then, simply injects them as it
// encounters them.
fromElements = new ArrayList();
ListIterator liter = fromClause.getFromElements().listIterator( fromClause.getFromElements().size() );
while ( liter.hasPrevious() ) {
fromElements.add( liter.previous() );
}
}
else {
fromElements = fromClause.getFromElements();
}
// Iterate through the alias,JoinSequence pairs and generate SQL token nodes.
Iterator iter = fromElements.iterator();
while ( iter.hasNext() ) {
final FromElement fromElement = (FromElement) iter.next();
JoinSequence join = fromElement.getJoinSequence();
join.setSelector(
new JoinSequence.Selector() {
public boolean includeSubclasses(String alias) {
// The uber-rule here is that we need to include subclass joins if
// the FromElement is in any way dereferenced by a property from
// the subclass table; otherwise we end up with column references
// qualified by a non-existent table reference in the resulting SQL...
boolean containsTableAlias = fromClause.containsTableAlias( alias );
if ( fromElement.isDereferencedBySubclassProperty() ) {
// TODO : or should we return 'containsTableAlias'??
LOG.tracev(
"Forcing inclusion of extra joins [alias={0}, containsTableAlias={1}]",
alias,
containsTableAlias
);
return true;
}
boolean shallowQuery = walker.isShallowQuery();
boolean includeSubclasses = fromElement.isIncludeSubclasses();
boolean subQuery = fromClause.isSubQuery();
return includeSubclasses && containsTableAlias && !subQuery && !shallowQuery;
}
}
);
addJoinNodes( query, join, fromElement );