@Override
public void visit(SubJoin subJoin) {
FromItem left = subJoin.getLeft();
FromItem right = subJoin.getJoin().getRightItem();
FromItemVisitorImpl leftVisitor = new FromItemVisitorImpl(where);
FromItemVisitorImpl rightVisitor = new FromItemVisitorImpl(where);
left.accept(leftVisitor);
right.accept(rightVisitor);
relationProvider = PlanFactory.getInstance().newJoin();
((Join) relationProvider)
.setInput(leftVisitor.getRelationProvider(), rightVisitor.getRelationProvider());
}
private static String[] getTables(List fromItems) {
if (fromItems == null) {
throw new NullPointerException("fromItems");
}
List tableNames = new ArrayList(fromItems.size());
for (Iterator it = fromItems.iterator(); it.hasNext(); ) {
FromItem fromItem = (FromItem) it.next();
String fromItemDef = fromItem.toString();
tableNames.add(fromItemDef);
}
return (String[]) tableNames.toArray(new String[tableNames.size()]);
}