SinglePage page = new SinglePage(compressPages); if(pages != null) pages.add(page);
SinglePage page = new SinglePage(); dataCache.add(page, 2);
	private SinglePage createDataPage() {		try {			SinglePage page = new SinglePage(compressPages);			if(pages != null)				pages.add(page);			return page;		} catch (IOException ioe) {			LOG.warn(ioe);			return null;		}	}