1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.model.path;
20
21 import javax.inject.Named;
22 import javax.inject.Singleton;
23
24 /**
25 * Normalizes a URL.
26 *
27 * @author Benjamin Bentmann
28 */
29 @Named
30 @Singleton
31 public class DefaultUrlNormalizer implements UrlNormalizer {
32
33 @Override
34 public String normalize(String url) {
35 String result = url;
36
37 if (result != null) {
38 while (true) {
39 int idx = result.indexOf("/../");
40 if (idx < 0) {
41 break;
42 } else if (idx == 0) {
43 result = result.substring(3);
44 continue;
45 }
46 int parent = idx - 1;
47 while (parent >= 0 && result.charAt(parent) == '/') {
48 parent--;
49 }
50 parent = result.lastIndexOf('/', parent);
51 if (parent < 0) {
52 result = result.substring(idx + 4);
53 } else {
54 result = result.substring(0, parent) + result.substring(idx + 3);
55 }
56 }
57 }
58
59 return result;
60 }
61 }