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.provider.res;
18
19 import org.apache.commons.lang3.StringUtils;
20 import org.apache.commons.vfs2.FileName;
21 import org.apache.commons.vfs2.FileSystemException;
22 import org.apache.commons.vfs2.FileType;
23 import org.apache.commons.vfs2.provider.local.GenericFileNameParser;
24
25 /**
26 * Slightly modified filename parser for resource URIs.
27 */
28 public class ResourceFileNameParser extends GenericFileNameParser {
29
30 private static final ResourceFileNameParserourceFileNameParser.html#ResourceFileNameParser">ResourceFileNameParser INSTANCE = new ResourceFileNameParser();
31
32 /**
33 * retrieve a instance to this parser.
34 *
35 * @return the parser
36 */
37 public static GenericFileNameParser getInstance() {
38 return INSTANCE;
39 }
40
41 @Override
42 protected String extractRootPrefix(final String uri, final StringBuilder name) throws FileSystemException {
43 // Resource URI (as used by ClassLoader.getResource()) are assumed to be absolute despite
44 // lacking a leading '/'. All leading '/' will be stripped from the name.
45
46 int index = 0;
47 while (index < name.length() && name.charAt(index) == '/') {
48 ++index;
49 }
50 if (index > 0) {
51 name.delete(0, index);
52 }
53
54 if (StringUtils.isEmpty(name)) {
55 throw new FileSystemException("vfs.provider.res/not-valid-resource-location.error", uri);
56 }
57
58 return "/";
59 }
60
61 @Override
62 protected FileName createFileName(final String scheme, final String rootFile, final String path,
63 final FileType type) {
64 return new ResourceFileName(scheme, path, type);
65 }
66 }