/** Returns {@code true} if the specified provider is for the authority. */
public boolean filter(final Object provider) {
if (authority == null) {
// If the user didn't specified an authority name, then the factory to use must
// be specified explicitly through a hint (e.g. Hints.CRS_AUTHORITY_FACTORY).
return false;
}
return Citations.identifierMatches(((AuthorityFactory) provider).getAuthority(), authority);
}
/** Returns the names of all currently registered authorities. */
public static synchronized Set<String> getAuthorityNames() {
/*
* IMPORTANT: Return the same Set instance (unmodifiable) as long as there is no change
* in the list of registered factories, and create a new instance in case of changes.
* 'add/removeAuthorityFactory(...)' and 'scanForPlugins()' methods reset 'authorityNames'
* to null, which will cause the creation of a new Set instance. Some implementations like
* AllAuthoritiesFactory rely on this behavior as a way to be notified of registration
* changes for clearing their cache.
*/
if (authorityNames == null) {
authorityNames = new LinkedHashSet<String>();
final Hints hints = EMPTY_HINTS;
loop:
for (int i = 0; ; i++) {
final Set<? extends AuthorityFactory> factories;
switch (i) {
case 0:
factories = getCRSAuthorityFactories(hints);
break;
case 1:
factories = getCSAuthorityFactories(hints);
break;
case 2:
factories = getDatumAuthorityFactories(hints);
break;
case 3:
factories = getCoordinateOperationAuthorityFactories(hints);
break;
default:
break loop;
}
for (final AuthorityFactory factory : factories) {
final Citation authority = factory.getAuthority();
if (authority != null) {
authorityNames.add(Citations.getIdentifier(authority));
for (final Identifier id : authority.getIdentifiers()) {
authorityNames.add(id.getCode());
}
}
}
}
authorityNames = Collections.unmodifiableSet(authorityNames);
}
return authorityNames;
}
/** Returns {@code true} if the specified provider is built by the vendor. */
public boolean filter(final Object provider) {
return Citations.titleMatches(((Factory) provider).getVendor(), vendor);
}
