1 package org.apache.maven.shared.filtering;
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 java.util.regex.Pattern;
23
24 import org.apache.maven.shared.utils.StringUtils;
25
26 /**
27 * @author Olivier Lamy
28 * @author Dennis Lundberg
29 */
30 public final class FilteringUtils
31 {
32 private static final String WINDOWS_PATH_PATTERN = "^(.*)[a-zA-Z]:\\\\(.*)";
33
34 private static final Pattern PATTERN = Pattern.compile( WINDOWS_PATH_PATTERN );
35
36 /**
37 *
38 */
39 private FilteringUtils()
40 {
41 // nothing just an util class
42 }
43
44 // TODO: Correct to handle relative windows paths. (http://jira.codehaus.org/browse/MSHARED-121)
45 // How do we distinguish a relative windows path from some other value that happens to contain backslashes??
46 /**
47 * @param val The value to be escaped.
48 * @return Escaped value
49 */
50 public static String escapeWindowsPath( String val )
51 {
52 if ( !StringUtils.isEmpty( val ) && PATTERN.matcher( val ).matches() )
53 {
54 // Adapted from StringUtils.replace in plexus-utils to accommodate pre-escaped backslashes.
55 StringBuilder buf = new StringBuilder( val.length() );
56 int start = 0, end = 0;
57 while ( ( end = val.indexOf( '\\', start ) ) != -1 )
58 {
59 buf.append( val.substring( start, end ) ).append( "\\\\" );
60 start = end + 1;
61
62 if ( val.indexOf( '\\', end + 1 ) == end + 1 )
63 {
64 start++;
65 }
66 }
67
68 buf.append( val.substring( start ) );
69
70 return buf.toString();
71 }
72 return val;
73 }
74
75 }