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 com.github.vfss3;
  
  import org.apache.commons.vfs2.FileSystemOptions;
  
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Used to identify a file system
   */
  class FileSystemKey implements Comparable<FileSystemKey> {
  
      private static final FileSystemOptions EMPTY_OPTIONS = new FileSystemOptions();
  
      private final Comparable<?> key;
      private final FileSystemOptions fileSystemOptions;
  
      /**
       * Create the FS key.
       *
       * @param key must implement Comparable, and must be self-comparable
       * @param fileSystemOptions the required options
       */
      FileSystemKey(Comparable<?> key, FileSystemOptions fileSystemOptions) {
          this.key = requireNonNull(key);
          if (fileSystemOptions != null) {
              this.fileSystemOptions = fileSystemOptions;
          } else {
              this.fileSystemOptions = EMPTY_OPTIONS;
          }
      }
  
      @Override
      public int compareTo(final FileSystemKey o) {
          @SuppressWarnings("unchecked") // Keys must implement comparable, and be comparable to themselves
          final Comparable<Comparable<?>> comparable = (Comparable<Comparable<?>>) key;
          final int ret = comparable.compareTo(o.key);
          if (ret != 0) {
              // other filesystem
              return ret;
          }
  
          return fileSystemOptions.compareTo(o.fileSystemOptions);
      }
  
      @Override
      public String toString() {
          return "FileSystemKey[key=" + key + ", fileSystemOptions=" + fileSystemOptions + "]";
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          FileSystemKey that = (FileSystemKey) o;
          return key.equals(that.key) &&
                  fileSystemOptions.equals(that.fileSystemOptions);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(key, fileSystemOptions);
      }
  }
  