/**
* Return the param value as "cls" class object. If the value is null (or empty string) return the
* defaultValue.<br>
* Note: For the first call, this method will parse the request (in case of a multipart).<br>
* <div class="issues"> <strong>Issues</strong>
*
* <ul>
* <li>FIXME: Need to fix the multipart handling. Can be simplified
* </ul>
*
* </div>
*
* @param <T> Class of the return element
* @param name of the parameter
* @param cls Class of the return element
* @param defaultValue Default value in case of an error or null/empty value
* @return
*/
@SuppressWarnings("unchecked")
public <T> T getParam(String name, Class<T> cls, T defaultValue) {
Map<String, Object> paramMap = getParamMap();
if (paramMap == null) {
return defaultValue;
}
// if we have a primitive type or array, then, just get the single value and convert it to the
// appropriate type
if (ObjectUtil.isPrimitive(cls) || cls.isArray() || cls == FileItem.class || cls.isEnum()) {
// first, try to get it from the paramMap
Object valueObject = paramMap.get(name);
if (isMultipart) {
// HACK
// if not found, try to get it from the regular HttpServletRequest
// (in the case of a multiPart post,
// HttpServletRequest.getParameter still have the URL params)
if (valueObject == null) {
valueObject = getReq().getParameter(name);
}
}
if (valueObject == null) {
return defaultValue;
} else if (valueObject instanceof String) {
return (T) ObjectUtil.getValue((String) valueObject, cls, defaultValue);
} else if (valueObject instanceof String[]) {
return (T) ObjectUtil.getValue((String[]) valueObject, cls, defaultValue);
} else {
// hope for the best (should be a fileItem)
return (T) valueObject;
}
}
// otherwise, if it is not a primitive type, attempt to create the targeted object with the
// corresponding paramMap
else {
Map subParamMap = getParamMap(name + "."); // i.e., "product."
if (subParamMap != null) {
try {
T value = cls.newInstance();
ObjectUtil.populate(value, subParamMap);
return value;
} catch (Exception e) {
logger.warn(e.getMessage());
return defaultValue;
}
} else {
return defaultValue;
}
}
}
/**
* @param <T>
* @param prefix
* @param cls
* @return The list of values given a param prefix
*/
public <T> List<T> getParamMapValues(String prefix, Class<T> cls) {
List<T> list = new ArrayList<T>();
Map<String, Object> prefixParamMap = getParamMap(prefix);
if (prefixParamMap != null) {
for (Object valueObj : prefixParamMap.values()) {
if (valueObj instanceof String) {
T value = ObjectUtil.getValue((String) valueObj, cls, null);
if (value != null) {
list.add(value);
}
}
}
}
return list;
}
public <T> T getCurrentPriPathAt(int i, Class<T> cls, T defaultValue) {
String valueStr = getCurrentPriPathAt(i);
return ObjectUtil.getValue(valueStr, cls, defaultValue);
}
public <T> T getCookie(String name, Class<T> cls, T defaultValue) {
return ObjectUtil.getValue(getCookie(name), cls, defaultValue);
}