/**
* Gets the information about an element's handlers in the current router configuration.
*
* @param el The element name.
* @return Vector of HandlerInfo structures.
* @exception NoSuchElementException If there is no such element in the current configuration.
* @exception HandlerErrorException If the handler returned an error.
* @exception PermissionDeniedException If the router would not let us access the handler.
* @exception IOException If there was some other error accessing the handler (e.g., there was a
* stream or socket error, the ControlSocket returned an unknwon unknown error code, or the
* response could otherwise not be understood).
* @see #HandlerInfo
* @see #getConfigElementNames
* @see #getRouterConfig
* @see #getRouterFlatConfig
*/
public Vector getElementHandlers(String elementName) throws ClickException, IOException {
Vector v = new Vector();
Vector vh;
try {
char[] buf = read(elementName, "handlers");
vh = StringUtils.split(buf, 0, '\n');
} catch (ClickException.NoSuchHandlerException e) {
return v;
}
for (int i = 0; i < vh.size(); i++) {
String s = (String) vh.elementAt(i);
int j;
for (j = 0; j < s.length() && !Character.isWhitespace(s.charAt(j)); j++)
; // find record split
if (j == s.length())
throw new ClickException.HandlerFormatException(elementName + ".handlers");
HandlerInfo hi = new HandlerInfo(elementName, s.substring(0, j).trim());
while (j < s.length() && Character.isWhitespace(s.charAt(j))) j++;
for (; j < s.length(); j++) {
char c = s.charAt(j);
if (Character.toLowerCase(c) == 'r') hi.canRead = true;
else if (Character.toLowerCase(c) == 'w') hi.canWrite = true;
else if (Character.isWhitespace(c)) break;
}
v.addElement(hi);
}
return v;
}
private boolean checkHandlerWorkaround(
String elementName, String handlerName, boolean writeHandler)
throws ClickException, IOException {
// If talking to an old ControlSocket, try the "handlers" handler
// instead.
String s = readString(elementName, "handlers");
int pos = 0;
// Find handler with same name.
while (true) {
pos = s.indexOf(handlerName, pos);
if (pos < 0) // no such handler
return false;
if ((pos == 0 || s.charAt(pos - 1) == '\n')
&& Character.isWhitespace(s.charAt(pos + handlerName.length()))) break;
pos++;
}
// we have a matching handler: will it be read/write suitable?
char wantType = (writeHandler ? 'w' : 'r');
for (pos += handlerName.length();
pos < s.length() && Character.isWhitespace(s.charAt(pos));
pos++) /* nada */ ;
for (; pos < s.length(); pos++) {
char c = s.charAt(pos);
if (Character.toLowerCase(c) == wantType) return true;
else if (Character.isWhitespace(c)) break;
}
return false;
}