1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one or more
4 * contributor license agreements. See the NOTICE file distributed with
5 * this work for additional information regarding copyright ownership.
6 * The ASF licenses this file to You under the Apache License, Version 2.0
7 * (the "License"); you may not use this file except in compliance with
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.maven.doxia.linkcheck.validation;
19
20 import java.util.regex.Matcher;
21 import java.util.regex.Pattern;
22
23 /**
24 * A helper class to test if some content matches the given HTML anchor
25 */
26 public class Anchors
27 {
28 /**
29 * Returns true if the given anchor can be found in the content markup.
30 *
31 * @param content the content string.
32 * @param anchor the anchor to match.
33 *
34 * @return true if the given anchor can be found in the content markup.
35 */
36 public static boolean matchesAnchor( String content, String anchor )
37 {
38 if ( content != null && anchor.length() > 0 ) {
39 // can use name or id attributes and also can use single or double quotes with whitespace around the =
40 String regex = "(?i)(name|id)(?-i)\\s*=\\s*('|\")" + escapeBrackets( anchor ) + "('|\")";
41 Pattern pattern = Pattern.compile( regex );
42 Matcher matcher = pattern.matcher( content );
43 return matcher.find();
44 }
45 return false;
46 }
47
48 // for javadoc links, see DOXIA-410
49 private static String escapeBrackets( String content )
50 {
51 final String escaped = content.replace( "(", "\\(" ).replace( ")", "\\)" );
52 return escaped.replace( "[", "\\[" ).replace( "]", "\\]" );
53 }
54
55 private Anchors()
56 {
57 // utility class
58 }
59 }