/**
* Insert the given {@code Provider} at the specified {@code position}. The positions define the
* preference order in which providers are searched for requested algorithms.
*
* @param provider the provider to insert.
* @param position the position (starting from 1).
* @return the actual position or {@code -1} if the given {@code provider} was already in the
* list. The actual position may be different from the desired position.
*/
public static synchronized int insertProviderAt(Provider provider, int position) {
// check that provider is not already
// installed, else return -1; if (position <1) or (position > max
// position) position = max position + 1; insert provider, shift up
// one position for next providers; Note: The position is 1-based
if (getProvider(provider.getName()) != null) {
return -1;
}
int result = Services.insertProviderAt(provider, position);
renumProviders();
return result;
}
