/**
* Adds a filter over the available portlets list based on category
*
* @param rundata The turbine rundata context for this request.
* @param context The velocity context for this request.
*/
public void doFilter(RunData rundata, Context context) throws Exception {
String[] filterFields = rundata.getParameters().getStrings("filter_field");
String[] filterValues = new String[filterFields.length];
for (int i = 0; i < filterFields.length; i++) {
String filterField = filterFields[i];
String filterValue = rundata.getParameters().getString(filterField + ":filter_value");
filterValues[i] = filterValue;
}
String regName =
getPortlet(context).getPortletConfig().getInitParameter("registry", Registry.PORTLET);
PortletSessionState.setAttribute(getPortlet(context), rundata, FILTER_FIELDS, filterFields);
PortletSessionState.setAttribute(getPortlet(context), rundata, FILTER_VALUES, filterValues);
PortletSessionState.setAttribute(rundata, PREFIX + regName + ":" + REFRESH, Boolean.TRUE);
}
/**
* @param rundata The turbine rundata context for this request.
* @param portlet The portlet
* @return The value of the start variable
*/
private int getStart(RunData rundata, Portlet portlet) {
int start = 0;
Integer startInteger = rundata.getParameters().getInteger(START, -1);
if (startInteger.intValue() == -1) {
startInteger = (Integer) PortletSessionState.getAttribute(portlet, rundata, START);
if (startInteger != null) {
start = startInteger.intValue();
}
} else {
PortletSessionState.setAttribute(portlet, rundata, START, startInteger);
start = startInteger.intValue();
}
return start;
}
/** Subclasses must override this method to provide default behavior for the portlet action */
protected void buildNormalContext(Portlet portlet, Context context, RunData rundata) {
String regName = portlet.getPortletConfig().getInitParameter("registry", Registry.PORTLET);
Boolean refresh =
(Boolean)
PortletSessionState.getAttribute(
rundata, PREFIX + regName + ":" + REFRESH, Boolean.FALSE);
if (refresh.equals(Boolean.TRUE)) {
PortletSessionState.clearAttribute(portlet, rundata, START);
PortletSessionState.clearAttribute(portlet, rundata, RESULTS);
PortletSessionState.clearAttribute(portlet, rundata, FILTERED_RESULTS);
PortletSessionState.clearAttribute(rundata, PREFIX + regName + ":" + REFRESH);
}
int start = getStart(rundata, portlet);
if (start < 0) start = 0;
String pageSize = portlet.getPortletConfig().getInitParameter("page-size", "20");
int size = Integer.parseInt(pageSize);
int prev = start - size;
if (prev < 0) {
prev = 0;
}
String[] filterFields =
(String[]) PortletSessionState.getAttribute(portlet, rundata, FILTER_FIELDS);
String[] filterValues =
(String[]) PortletSessionState.getAttribute(portlet, rundata, FILTER_VALUES);
List regEntries = (List) PortletSessionState.getAttribute(portlet, rundata, RESULTS);
List filteredEntries =
(List) PortletSessionState.getAttribute(portlet, rundata, FILTERED_RESULTS);
if (regEntries == null) {
Iterator i = Registry.get(regName).listEntryNames();
regEntries = new ArrayList();
while (i.hasNext()) {
String name = (String) i.next();
RegistryEntry regEntry = Registry.getEntry(regName, name);
if ((regEntry != null) && (!regEntry.isHidden())) {
regEntries.add(regEntry);
}
}
Collections.sort(
regEntries,
new Comparator() {
public int compare(Object o1, Object o2) {
String t1 = ((RegistryEntry) o1).getName().toLowerCase();
String t2 = ((RegistryEntry) o2).getName().toLowerCase();
return t1.compareTo(t2);
}
});
PortletSessionState.setAttribute(portlet, rundata, RESULTS, regEntries);
filteredEntries = filter(regEntries, filterFields, filterValues);
PortletSessionState.setAttribute(portlet, rundata, FILTERED_RESULTS, filteredEntries);
}
if (filterFields != null
&& filterValues != null
&& filterFields.length == filterValues.length) {
for (int i = 0; i < filterFields.length; i++) {
String field = filterFields[i];
String value = filterValues[i];
context.put(field + "_filter_value", value);
}
}
int end = start + size;
if (end > filteredEntries.size()) {
end = filteredEntries.size();
}
List pageEntries = filteredEntries.subList(start, end);
context.put("registry", pageEntries);
context.put("filtered_entries", filteredEntries);
if (start > 0) {
context.put("prev", String.valueOf(prev));
}
if (end < filteredEntries.size()) {
context.put("next", String.valueOf(end));
}
}