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.vfs2.cache;
18
19 import org.apache.commons.vfs2.FileName;
20 import org.apache.commons.vfs2.FileSystem;
21
22 /**
23 * Key for various cache implementations.
24 * <p>
25 * It compares the fileSystem (by hashCode) and the file name.
26 * </p>
27 */
28 final class FileSystemAndNameKey implements Comparable<FileSystemAndNameKey> {
29
30 /** The FileSystem */
31 private final FileSystem fileSystem;
32
33 /** The FileName */
34 private final FileName fileName;
35
36 /** Hash code to identify this object */
37 private final int fileSystemId;
38
39 FileSystemAndNameKey(final FileSystem fileSystem, final FileName fileName) {
40 this.fileSystem = fileSystem;
41 this.fileSystemId = System.identityHashCode(fileSystem);
42 this.fileName = fileName;
43 }
44
45 @Override
46 public int compareTo(final FileSystemAndNameKey other) {
47 if (fileSystemId < other.fileSystemId) {
48 return -1;
49 }
50 if (fileSystemId > other.fileSystemId) {
51 return 1;
52 }
53 return fileName.compareTo(other.fileName);
54 }
55
56 FileName getFileName() {
57 return fileName;
58 }
59
60 FileSystem getFileSystem() {
61 return fileSystem;
62 }
63 }