content: /*
   * Copyright 2012-2021 the original author or 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
   *
   *      https://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 org.platformlambda.spring.patch;
  
  import org.springframework.boot.env.OriginTrackedMapPropertySource;
  import org.springframework.boot.env.PropertySourceLoader;
  import org.springframework.core.env.PropertySource;
  import org.springframework.core.io.Resource;
  import org.springframework.util.ClassUtils;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  public class YamlPropertySourceLoader implements PropertySourceLoader {
  
      @Override
      public String[] getFileExtensions() {
          return new String[] { "yml", "yaml" };
      }
  
      @Override
      public List<PropertySource<?>> load(String name, Resource resource) {
          if (!ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", getClass().getClassLoader())) {
              throw new IllegalStateException(
                      "Attempted to load " + name + " but snakeyaml was not found on the classpath");
          }
          List<Map<String, Object>> loaded = new OriginTrackedYamlLoader(resource).load();
          if (loaded.isEmpty()) {
              return Collections.emptyList();
          }
          List<PropertySource<?>> propertySources = new ArrayList<>(loaded.size());
          for (int i = 0; i < loaded.size(); i++) {
              String documentNumber = (loaded.size() != 1) ? " (document #" + i + ")" : "";
              propertySources.add(new OriginTrackedMapPropertySource(name + documentNumber,
                      Collections.unmodifiableMap(loaded.get(i)), true));
          }
          return propertySources;
      }
  
  }