/**
* Use the fully qualified name of a MimeDetector and try to instantiate it if it's not already
* registered. If it's already registered then log a warning and return the already registered
* MimeDetector
*
* @param mimeDetector
* @return MimeDetector registered under this name. Returns null if an exception occurs
*/
MimeDetector registerMimeDetector(final String mimeDetector) {
if (mimeDetectors.containsKey(mimeDetector)) {
log.warn(
"MimeDetector ["
+ mimeDetector
+ "] will not be registered as a MimeDetector with this name is already registered.");
return (MimeDetector) mimeDetectors.get(mimeDetector);
}
// Create the mime detector if we can
try {
MimeDetector md = (MimeDetector) Class.forName(mimeDetector).newInstance();
md.init();
if (log.isDebugEnabled()) {
log.debug(
"Registering MimeDetector with name ["
+ md.getName()
+ "] and description ["
+ md.getDescription()
+ "]");
}
mimeDetectors.put(mimeDetector, md);
return md;
} catch (Exception e) {
log.error("Exception while registering MimeDetector [" + mimeDetector + "].", e);
}
// Failed to create an instance
return null;
}
/**
* unregister the MimeDetector from the list.
*
* @param mimeDetector the MimeDetector to unregister
* @return MimeDetector unregistered or null if it was not registered
*/
MimeDetector unregisterMimeDetector(final MimeDetector mimeDetector) {
if (mimeDetector == null) {
return null;
}
return unregisterMimeDetector(mimeDetector.getName());
}
