protected Image getImage(Object element) { if (!(element instanceof Attachment)) { return null; } Attachment attachment = (Attachment) element; Image thumb = null; if (Arrays.asList(Attachment.getImageMimeTypes()).contains(attachment.getMimeType())) { Element cacheElement = getCache().get(attachment.getDbId()); if (cacheElement != null) { // != is correct here if (cacheElement.getObjectValue() != EMPTY_CACHE_ELEMENT) { ImageData imageData = (ImageData) cacheElement.getObjectValue(); thumb = new Image(FileView.getDisplay(), imageData); } } else { byte[] fileData = loadFileData(attachment); thumb = createImage(fileData); if (thumb != null) { getCache().put(new Element(attachment.getDbId(), thumb.getImageData())); } else { getCache().put(new Element(attachment.getDbId(), EMPTY_CACHE_ELEMENT)); } } } return thumb; }