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 org.codehaus.plexus.component.annotations.Component;
23
24 /**
25 * Normalizes a URL.
26 *
27 * @author Benjamin Bentmann
28 */
29 @Component( role = UrlNormalizer.class )
30 public class DefaultUrlNormalizer
31 implements UrlNormalizer
32 {
33
34 @Override
35 public String normalize( String url )
36 {
37 String result = url;
38
39 if ( result != null )
40 {
41 while ( true )
42 {
43 int idx = result.indexOf( "/../" );
44 if ( idx <= 0 )
45 {
46 break;
47 }
48 int parent = idx - 1;
49 while ( parent >= 0 && result.charAt( parent ) == '/' )
50 {
51 parent--;
52 }
53 parent = result.lastIndexOf( '/', parent );
54 if ( parent < 0 )
55 {
56 break;
57 }
58 result = result.substring( 0, parent ) + result.substring( idx + 3 );
59 }
60 }
61
62 return result;
63 }
64
65 }