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public class WeatherConnectrOperations {

 public void select(@MetadataKeyId(RecordKeysResolver.class) String type) {
 }
}

public class RecordKeysResolver implements TypeKeysResolver {

 @Override
 public String getCategoryName() {
     return "Records";
 }
 @Override
 public Set<MetadataKey> getKeys(MetadataContext context) throws MetadataResolvingException, ConnectionException {
     // First we need to obtain the key IDs that will be used.
     // This is where you'd normally use `context.getConfig()`
     // or `context.getConnection()` to obtain the entity id's
     // from a remote service, for this demo the keys will be fixed
     System.out.println("Hello");
     List<String> keyIds = Arrays.asList("Author_id", "BookList_id", "Book_id");
     HashSet<MetadataKey> keys = new HashSet<>();
     for (String id : keyIds) {
         // For each possible if, we create a new MetadataKey with that ID
         MetadataKeyBuilder builder = MetadataKeyBuilder.newKey(id);
         // Then, we add a DisplayName to that MetadataKey,
         // this will be the name shown in the UI
         builder.withDisplayName(StringUtils.removeEnd(id, "_id"));
         // finally, add the key to the Set of known MetadataKeys
         keys.add(builder.build());
     }
     return keys;
 }
}