content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.camel.spring.boot.util;
  
  import java.util.Collection;
  import org.springframework.boot.context.properties.bind.Bindable;
  import org.springframework.boot.context.properties.bind.Binder;
  import org.springframework.context.ApplicationContext;
  import org.springframework.core.env.Environment;
  
  public final class HierarchicalPropertiesEvaluator {
  
      private HierarchicalPropertiesEvaluator() {
      }
  
      /**
       * Determine the value of the "enabled" flag for a hierarchy of properties.
       *
       * @param applicationContext
       *            the spring {@link ApplicationContext}
       * @param prefixes
       *            an ordered list of prefixed (less restrictive to more restrictive)
       *
       * @return the value of the key `enabled` for most restrictive prefix
       */
      public static boolean evaluate(ApplicationContext applicationContext, String... prefixes) {
          return evaluate(applicationContext.getEnvironment(), prefixes);
      }
  
      /**
       * Determine the value of the "enabled" flag for a hierarchy of properties.
       *
       * @param environment
       *            the environment
       * @param prefixes
       *            an ordered list of prefixed (less restrictive to more restrictive)
       *
       * @return the value of the key `enabled` for most restrictive prefix
       */
      public static boolean evaluate(Environment environment, String... prefixes) {
          boolean answer = true;
  
          // Loop over all the prefixes to find out the value of the key `enabled`
          // for the most restrictive prefix.
          for (String prefix : prefixes) {
              // evaluate the value of the current prefix using the parent one
              // as default value so if the enabled property is not set, the parent
              // one is used.
              answer = isEnabled(environment, prefix, answer);
          }
  
          return answer;
      }
  
      /**
       * Determine the value of the "enabled" flag for a hierarchy of properties.
       *
       * @param environment
       *            the environment
       * @param prefixes
       *            an ordered list of prefixed (less restrictive to more restrictive)
       *
       * @return the value of the key `enabled` for most restrictive prefix
       */
      public static boolean evaluate(Environment environment, Collection<String> prefixes) {
          boolean answer = true;
  
          // Loop over all the prefixes to find out the value of the key `enabled`
          // for the most restrictive prefix.
          for (String prefix : prefixes) {
              // evaluate the value of the current prefix using the parent one
              // as default value so if the enabled property is not set, the parent
              // one is used.
              answer = isEnabled(environment, prefix, answer);
          }
  
          return answer;
      }
  
      private static boolean isEnabled(Environment environment, String prefix, boolean defaultValue) {
          String property = prefix.endsWith(".") ? prefix + "enabled" : prefix + ".enabled";
          Binder binder = Binder.get(environment);
          return binder.bind(property, Bindable.of(Boolean.class)).orElse(defaultValue);
      }
  }
  