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 public String normalize( String url )
35 {
36 String result = url;
37
38 if ( result != null )
39 {
40 result = result.replaceAll( "(?<![:/])/+", "/" );
41
42 while ( true )
43 {
44 int idx = result.indexOf( "/../" );
45 if ( idx <= 0 )
46 {
47 break;
48 }
49 int parent = result.lastIndexOf( '/', idx - 1 );
50 if ( parent < 0 )
51 {
52 break;
53 }
54 result = result.substring( 0, parent ) + result.substring( idx + 3 );
55 }
56 }
57
58 return result;
59 }
60
61 }