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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.cache;
    18
    19  import org.apache.commons.vfs.FileName;
    20  import org.apache.commons.vfs.FileSystem;
    21
    22  /***
    23   * Key for various cache implementations.<br>
    24   * It compares the fileSystem (by hashCode) and the filename.
    25   *
    26   * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
    27   * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
    28   */
    29  class FileSystemAndNameKey implements Comparable
    30  {
    31      private final FileSystem fileSystem;
    32      private final FileName fileName;
    33      private final int fileSystemId;
    34
    35      FileSystemAndNameKey(final FileSystem fileSystem, final FileName fileName)
    36      {
    37          this.fileSystem = fileSystem;
    38          this.fileSystemId = System.identityHashCode(fileSystem);
    39
    40          this.fileName = fileName;
    41      }
    42
    43      public int compareTo(Object o)
    44      {
    45          FileSystemAndNameKey other = (FileSystemAndNameKey) o;
    46
    47          if (fileSystemId < other.fileSystemId)
    48          {
    49              return -1;
    50          }
    51          if (fileSystemId > other.fileSystemId)
    52          {
    53              return 1;
    54          }
    55
    56          return fileName.compareTo(other.fileName);
    57      }
    58
    59      FileSystem getFileSystem()
    60      {
    61          return fileSystem;
    62      }
    63
    64      FileName getFileName()
    65      {
    66          return fileName;
    67      }
    68  }