/*
    * 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.logging.log4j.core.config.yaml;
  
  import org.apache.logging.log4j.core.LoggerContext;
  import org.apache.logging.log4j.core.config.Configuration;
  import org.apache.logging.log4j.core.config.ConfigurationFactory;
  import org.apache.logging.log4j.core.config.ConfigurationSource;
  import org.apache.logging.log4j.core.config.Order;
  import org.apache.logging.log4j.core.config.plugins.Plugin;
  import org.apache.logging.log4j.core.util.Loader;
  
  @Plugin(name = "YamlConfigurationFactory", category = ConfigurationFactory.CATEGORY)
  @Order(7)
  public class YamlConfigurationFactory extends ConfigurationFactory {
  
      /**
       * The file extensions supported by this factory.
       */
      private static final String[] SUFFIXES = new String[] {".yml", ".yaml"};
  
      private static final String[] dependencies = new String[] {
              "com.fasterxml.jackson.databind.ObjectMapper",
              "com.fasterxml.jackson.databind.JsonNode",
              "com.fasterxml.jackson.core.JsonParser",
              "com.fasterxml.jackson.dataformat.yaml.YAMLFactory"
      };
  
      private final boolean isActive;
  
      public YamlConfigurationFactory() {
          for (final String dependency : dependencies) {
              if (!Loader.isClassAvailable(dependency)) {
                  LOGGER.debug("Missing dependencies for Yaml support, ConfigurationFactory {} is inactive", getClass().getName());
                  isActive = false;
                  return;
              }
          }
          isActive = true;
      }
  
      @Override
      protected boolean isActive() {
          return isActive;
      }
  
      @Override
      public Configuration getConfiguration(final LoggerContext loggerContext, final ConfigurationSource source) {
          if (!isActive) {
              return null;
          }
          return new YamlConfiguration(loggerContext, source);
      }
  
      @Override
      public String[] getSupportedTypes() {
          return SUFFIXES;
      }
  
  }