protected CmdOptionHandler findHandler(
final AccessibleObject element,
final int argsCount,
final Class<? extends CmdOptionHandler> cmdOptionHandlerType) {
CmdOptionHandler handler = null;
if (cmdOptionHandlerType != null && !cmdOptionHandlerType.equals(CmdOptionHandler.class)) {
// requested a specific handler
final CmdOptionHandler dedicatedHandler;
if (handlerRegistry.containsKey(cmdOptionHandlerType)) {
dedicatedHandler = handlerRegistry.get(cmdOptionHandlerType);
} else {
try {
dedicatedHandler = cmdOptionHandlerType.newInstance();
} catch (final Exception e) {
final PreparedI18n msg =
i18n.preparetr("Could not create handler: {0}", cmdOptionHandlerType);
throw new CmdlineParserException(msg.notr(), e, msg.tr());
}
// not registering this handler because self-introduced handler
// (only in a specific annotation) should not be made available
// to all other options.
}
if (dedicatedHandler.canHandle(element, argsCount)) {
handler = dedicatedHandler;
}
} else {
// walk through registered hander and find one
for (final CmdOptionHandler regHandle : handlerRegistry.values()) {
if (regHandle.canHandle(element, argsCount)) {
handler = regHandle;
break;
}
}
}
if (handler == null && parent != null) {
return parent.findHandler(element, argsCount, cmdOptionHandlerType);
} else {
return handler;
}
}
private void debug(final String msg, final Object... args) {
// always log.debug
if (log.isDebugEnabled()) {
if (args == null || args.length == 0) {
log.debug(msg);
} else {
log.debug(MessageFormat.format(msg, args));
}
}
if (parent != null) {
parent.debug(msg, args);
} else {
if (debugMode) {
if (args == null || args.length == 0) {
System.out.println(DEBUG_PREFIX + msg);
} else {
System.out.println(DEBUG_PREFIX + MessageFormat.format(msg, args));
}
}
}
}