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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.commons.vfs.provider;
    18
    19  import org.apache.commons.vfs.FileSystemOptions;
    20
    21  /***
    22   * Used to identify a filesystem
    23   *
    24   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
    25   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
    26   */
    27  class FileSystemKey implements Comparable
    28  {
    29      private final static FileSystemOptions EMPTY_OPTIONS = new FileSystemOptions();
    30
    31      final Comparable key;
    32      final FileSystemOptions fileSystemOptions;
    33
    34      FileSystemKey(final Comparable key, final FileSystemOptions fileSystemOptions)
    35      {
    36          this.key = key;
    37          if (fileSystemOptions != null)
    38          {
    39              this.fileSystemOptions = fileSystemOptions;
    40          }
    41          else
    42          {
    43              this.fileSystemOptions = EMPTY_OPTIONS;
    44          }
    45      }
    46
    47      public int compareTo(Object o)
    48      {
    49          FileSystemKey fk = (FileSystemKey) o;
    50
    51          int ret = key.compareTo(fk.key);
    52          if (ret != 0)
    53          {
    54              // other filesystem
    55              return ret;
    56          }
    57
    58          return fileSystemOptions.compareTo(fk.fileSystemOptions);
    59      }
    60  }