private void edit(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String linkIdParam = request.getParameter(PARAM_LINK_ID);
String title = request.getParameter(PARAM_TITLE);
String image = request.getParameter(PARAM_IMAGE);
String url = request.getParameter(PARAM_URL);
if (linkIdParam == null || !Utils.isNumeric(linkIdParam)) {
response.sendError(400);
return;
}
try {
long linkId = Long.valueOf(linkIdParam);
Link link = linkDao.getLinkById(linkId);
if (title != null) {
link.setTitle(title);
}
if (image != null) {
link.setImage(image);
}
if (url != null) {
link.setUrl(url);
}
linkDao.updateLink(link);
response.sendRedirect(LINK_PAGE_URL);
} catch (NumberFormatException ex) {
logger.log(Level.SEVERE, ex.getMessage(), ex);
response.sendError(400, ex.getMessage());
} catch (DataAccessException ex) {
logger.log(Level.SEVERE, ex.getMessage(), ex);
response.sendError(500, ex.getMessage());
}
}
private void add(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String title = request.getParameter(PARAM_TITLE);
String image = request.getParameter(PARAM_IMAGE);
String url = request.getParameter(PARAM_URL);
if (title == null || url == null) {
response.sendError(400);
return;
}
try {
if (image == null) {
linkDao.createNewLink(title, url);
} else {
linkDao.createNewLink(title, image, url);
}
response.sendRedirect(LINK_PAGE_URL);
} catch (DataAccessException ex) {
logger.log(Level.SEVERE, ex.getMessage(), ex);
response.sendError(500, ex.getMessage());
}
}
private void delete(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String linkIdParam = request.getParameter(PARAM_LINK_ID);
if (linkIdParam == null || !Utils.isNumeric(linkIdParam)) {
response.sendError(400);
return;
}
try {
long linkId = Long.valueOf(linkIdParam);
linkDao.deleteLink(linkId);
response.sendRedirect(LINK_PAGE_URL);
} catch (NumberFormatException ex) {
logger.log(Level.SEVERE, ex.getMessage(), ex);
response.sendError(400, ex.getMessage());
} catch (DataAccessException ex) {
logger.log(Level.SEVERE, ex.getMessage(), ex);
response.sendError(500, ex.getMessage());
}
}