01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.FileObject;
21: import org.apache.commons.vfs.FileSystem;
22:
23: /**
24: * <p/>
25: * A {@link org.apache.commons.vfs.FilesCache} implementation.<br>
26: * This implementation never ever caches a single file.
27: * </p>
28: * <p/>
29: * <b>Notice: if you use resolveFile(uri) multiple times with the same path, the system will always create a new instance.
30: * Changes on one instance of this file are not seen by the others.</b>
31: * </p>
32: *
33: * @author <a href="mailto:imario@apache.org">Mario Ivankovits</a>
34: * @version $Revision: 480428 $ $Date: 2006-11-28 22:15:24 -0800 (Tue, 28 Nov 2006) $
35: */
36: public class NullFilesCache extends AbstractFilesCache {
37: public void putFile(final FileObject file) {
38: }
39:
40: public FileObject getFile(final FileSystem filesystem,
41: final FileName name) {
42: return null;
43: }
44:
45: public void clear(FileSystem filesystem) {
46: }
47:
48: public void close() {
49: super .close();
50: }
51:
52: public void removeFile(FileSystem filesystem, FileName name) {
53: }
54:
55: public void touchFile(FileObject file) {
56: }
57: }
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