/**
* Return the request parameters as a Properties. Only the first value of multivalued parameters
* is included.
*/
Properties getParamsAsProps() {
Properties props = new Properties();
for (Enumeration en = req.getParameterNames(); en.hasMoreElements(); ) {
String name = (String) en.nextElement();
props.setProperty(name, req.getParameter(name));
}
return props;
}
/** Concatenate params for URL string */
String concatParams(Properties props) {
if (props == null) {
return null;
}
java.util.List list = new ArrayList();
for (Iterator iter = props.keySet().iterator(); iter.hasNext(); ) {
String key = (String) iter.next();
String val = props.getProperty(key);
if (!StringUtil.isNullString(val)) {
list.add(key + "=" + urlEncode(val));
}
}
return StringUtil.separatedString(list, "&");
}
String modifyParams(String key, String val) {
Properties props = getParamsAsProps();
props.setProperty(key, val);
return concatParams(props);
}