be.atbash.ee.security.octopus.jwt.parameter.JWTParameterHeaderDefaultProviderServiceLoader Maven / Gradle / Ivy
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/*
* Copyright 2017-2022 Rudy De Busscher (https://www.atbash.be)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package be.atbash.ee.security.octopus.jwt.parameter;
import be.atbash.util.ordered.OrderComparator;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
final class JWTParameterHeaderDefaultProviderServiceLoader {
private static JWTParameterHeaderDefaultProviderServiceLoader INSTANCE;
private final List defaultProviders;
private JWTParameterHeaderDefaultProviderServiceLoader() {
defaultProviders = new ArrayList<>();
ServiceLoader providers = ServiceLoader.load(JWTParameterHeaderDefaultProvider.class);
for (JWTParameterHeaderDefaultProvider provider : providers) {
defaultProviders.add(provider);
}
defaultProviders.sort(new OrderComparator());
}
static synchronized List getDefaultProviders() {
// Synchronize methods are not so bad for performance anymore and since only 1 synchronized static there are no side effects
if (INSTANCE == null) {
INSTANCE = new JWTParameterHeaderDefaultProviderServiceLoader();
}
return INSTANCE.defaultProviders;
}
}