LOG.debug("reading collection metadata for " + doc.getDocId());
	public void readDocumentMetadata(final DocumentImpl doc) {		new DOMTransaction(this, domDb, Lock.WRITE_LOCK) {			public Object start() throws ReadOnlyException {				final Value val = domDb.get(doc.getAddress());				doc.deserialize(val.getData());				return null;			}		}		.run();	}