1 package org.apache.maven.model.path;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import javax.inject.Named;
23 import javax.inject.Singleton;
24
25 /**
26 * Normalizes a URL.
27 *
28 * @author Benjamin Bentmann
29 */
30 @Named
31 @Singleton
32 public class DefaultUrlNormalizer
33 implements UrlNormalizer
34 {
35
36 @Override
37 public String normalize( String url )
38 {
39 String result = url;
40
41 if ( result != null )
42 {
43 while ( true )
44 {
45 int idx = result.indexOf( "/../" );
46 if ( idx < 0 )
47 {
48 break;
49 }
50 else if ( idx == 0 )
51 {
52 result = result.substring( 3 );
53 continue;
54 }
55 int parent = idx - 1;
56 while ( parent >= 0 && result.charAt( parent ) == '/' )
57 {
58 parent--;
59 }
60 parent = result.lastIndexOf( '/', parent );
61 if ( parent < 0 )
62 {
63 result = result.substring( idx + 4 );
64 }
65 else
66 {
67 result = result.substring( 0, parent ) + result.substring( idx + 3 );
68 }
69 }
70 }
71
72 return result;
73 }
74
75 }