public Iterator<T> iterator() { _broker.assertNontransactionalRead(); CloseableIterator citr = null; try { // create an iterator chain; add pnew objects if transactional CloseableIteratorChain chain = new CloseableIteratorChain(); boolean trans = !_ignore && _broker.isActive(); if (trans) chain.addIterator(new FilterNewIterator()); // add database iterators for each implementing class MetaDataRepository repos = _broker.getConfiguration().getMetaDataRepositoryInstance(); ClassMetaData meta = repos.getMetaData(_type, _broker.getClassLoader(), false); ClassMetaData[] metas; if (meta != null && (!_subs || !meta.isManagedInterface()) && (meta.isMapped() || (_subs && meta.getMappedPCSubclassMetaDatas().length > 0))) metas = new ClassMetaData[] {meta}; else if (_subs && (meta == null || meta.isManagedInterface())) metas = repos.getImplementorMetaDatas(_type, _broker.getClassLoader(), false); else metas = EMPTY_METAS; ResultObjectProvider rop; for (int i = 0; i < metas.length; i++) { rop = _broker.getStoreManager().executeExtent(metas[i], _subs, _fc); if (rop != null) chain.addIterator(new ResultObjectProviderIterator(rop)); } // filter deleted objects if transactional if (trans) citr = new FilterDeletedIterator(chain); else citr = chain; citr.setRemoveOnClose(this); } catch (OpenJPAException ke) { throw ke; } catch (RuntimeException re) { throw new GeneralException(re); } lock(); try { if (_openItrs == null) _openItrs = new ReferenceHashSet(ReferenceHashSet.WEAK); _openItrs.add(citr); } finally { unlock(); } return citr; }