/**
 * Copyright 2018 The original authors.
 *
 * 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 io.dekorate.config;

import java.util.Comparator;
import java.util.List;
import java.util.ServiceLoader;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;

/**
 * Utility class to locate all the additional resources.
 */
public final class AdditionalResourcesLocator {

  private AdditionalResourcesLocator() {

  }

  public static List<String> getAdditionalResources() {
    ServiceLoader<AdditionalResourcesProvider> loader = ServiceLoader.load(AdditionalResourcesProvider.class,
        AdditionalResourcesProvider.class.getClassLoader());
    return StreamSupport.stream(loader.spliterator(), false)
        .sorted(Comparator.comparingInt(AdditionalResourcesProvider::order).reversed())
        .flatMap(provider -> provider.getResourceNames().stream())
        .collect(Collectors.toList());
  }
}
