public PaginationAttributeAdder setPageSize(int pageSize) {
if (!IntegerUtils.isPositive(pageSize)) {
pageSize = Integer.MAX_VALUE;
}
this.pageSize = pageSize;
return this;
}
public PaginationAttributeAdder setVisibleButtonSize(int visibleButtonSize) {
if (!IntegerUtils.isPositive(visibleButtonSize)) {
visibleButtonSize = Integer.MAX_VALUE;
}
this.visibleButtonSize = visibleButtonSize;
return this;
}
public void add() {
Integer pageNumber = getIntParameter(PAGE_NUMBER_KEY);
if (!IntegerUtils.isPositive(pageNumber)) {
pageNumber = 1;
}
long itemCount = factory.getCount();
int pageCount = PaginationUtils.getPageCount(itemCount, pageSize);
if (pageNumber > pageCount) {
pageNumber = pageCount;
}
String pageUrl = request.getRequestURI();
List<String> parameters = new ArrayList<>();
@SuppressWarnings("unchecked")
Set<Map.Entry<String, Object>> entries = request.getParameterMap().entrySet();
for (Map.Entry<String, Object> entry : entries) {
if (entry.getKey().equals(PAGE_NUMBER_KEY)) {
continue;
}
Object value = entry.getValue();
if (value == null) {
continue;
}
if (value instanceof String) {
parameters.add(entry.getKey() + "=" + UrlUtils.encode((String) value));
} else if (value.getClass().isArray()) {
String[] strings = (String[]) value;
if (strings.length > 0) {
parameters.add(entry.getKey() + "=" + UrlUtils.encode(strings[0]));
}
}
}
if (parameters.size() > 0) {
pageUrl += "?" + Joiner.on("&").join(parameters);
}
List<PaginationAnchor> anchors =
PaginationAnchor.create(pageUrl, pageCount, visibleButtonSize, pageNumber);
request.setAttribute("paginationAnchors", anchors);
request.setAttribute("rowStartIndex", (pageNumber - 1) * pageSize + 1);
request.setAttribute(rowItemsName, factory.getInstances((pageNumber - 1) * pageSize, pageSize));
request.setAttribute(rowItemCountName, itemCount);
}