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.ambari.server.stack;
  
  
  import java.io.File;
  import java.io.FilenameFilter;
  
  /**
   * Base stack definition directory.
   * Contains functionality common across directory types.
   */
  public abstract class StackDefinitionDirectory {
    /**
     * xml filename filter
     */
    protected static final FilenameFilter XML_FILENAME_FILTER = new FilenameFilter() {
      @Override
      public boolean accept(File folder, String fileName) {
        return fileName.toLowerCase().endsWith(".xml");
      }
    };
  
    public static final String CONFIG_UPGRADE_XML_FILENAME_PREFIX = "config-upgrade.xml";
  
    /**
     * underlying directory
     */
    protected File directory;
  
  
    /**
     * Constructor.
     *
     * @param directory  underlying directory
     */
    public StackDefinitionDirectory(String directory) {
      //todo: handle non-existent dir
      this.directory = new File(directory);
    }
  
    /**
     * Obtain the configuration sub-directory instance for the specified path.
     *
     * @param directoryName  name of the configuration directory
     * @return ConfigurationDirectory instance for the specified configuration directory name
     */
    public ConfigurationDirectory getConfigurationDirectory(String directoryName, String propertiesDirectoryName) {
      ConfigurationDirectory configDirectory = null;
      File configDirFile = new File(directory.getAbsolutePath() + File.separator + directoryName);
      File propertiesDirFile = new File(directory.getAbsolutePath() + File.separator + propertiesDirectoryName);
      if (configDirFile.exists() && configDirFile.isDirectory())  {
        if(propertiesDirFile.exists() && propertiesDirFile.isDirectory()) {
          configDirectory = new ConfigurationDirectory(configDirFile.getAbsolutePath(), propertiesDirFile.getAbsolutePath());
        } else {
          configDirectory = new ConfigurationDirectory(configDirFile.getAbsolutePath(), null);
        }
      }
      return configDirectory;
    }
  
    /**
     * Obtain the path for this directory instance.
     *
     * @return the path represented by this directory
     */
    public String getPath() {
      return directory.getPath();
    }
  
    /**
     * Obtain the absolute path for this directory instance.
     *
     * @return the absolute path represented by this directory
     */
    public String getAbsolutePath() {
      return directory.getAbsolutePath();
    }
  
    /**
     * Obtain the name of the directory.
     *
     * @return name of the directory
     */
    public String getName() {
      return directory.getName();
    }
  
    /**
     * Obtain the underlying directory.
     *
     * @return the underlying directory file
     */
    protected File getDirectory() {
      return directory;
    }
  }
  