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      1 //
      2 //  ========================================================================
      3 //  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
      4 //  ------------------------------------------------------------------------
      5 //  All rights reserved. This program and the accompanying materials
      6 //  are made available under the terms of the Eclipse Public License v1.0
      7 //  and Apache License v2.0 which accompanies this distribution.
      8 //
      9 //      The Eclipse Public License is available at
     10 //      http://www.eclipse.org/legal/epl-v10.html
     11 //
     12 //      The Apache License v2.0 is available at
     13 //      http://www.opensource.org/licenses/apache2.0.php
     14 //
     15 //  You may elect to redistribute this code under either of these licenses.
     16 //  ========================================================================
     17 //
     18 
     19 package org.eclipse.jetty.util;
     20 
     21 import java.net.URI;
     22 import java.util.ArrayList;
     23 import java.util.List;
     24 import java.util.regex.Pattern;
     25 
     26 public abstract class PatternMatcher
     27 {
     28     public abstract void matched (URI uri) throws Exception;
     29 
     30 
     31     /**
     32      * Find jar names from the provided list matching a pattern.
     33      *
     34      * If the pattern is null and isNullInclusive is true, then
     35      * all jar names will match.
     36      *
     37      * A pattern is a set of acceptable jar names. Each acceptable
     38      * jar name is a regex. Each regex can be separated by either a
     39      * "," or a "|". If you use a "|" this or's together the jar
     40      * name patterns. This means that ordering of the matches is
     41      * unimportant to you. If instead, you want to match particular
     42      * jar names, and you want to match them in order, you should
     43      * separate the regexs with "," instead.
     44      *
     45      * Eg "aaa-.*\\.jar|bbb-.*\\.jar"
     46      * Will iterate over the jar names and match
     47      * in any order.
     48      *
     49      * Eg "aaa-*\\.jar,bbb-.*\\.jar"
     50      * Will iterate over the jar names, matching
     51      * all those starting with "aaa-" first, then "bbb-".
     52      *
     53      * @param pattern the pattern
     54      * @param uris the uris to test the pattern against
     55      * @param isNullInclusive if true, an empty pattern means all names match, if false, none match
     56      * @throws Exception
     57      */
     58     public void match (Pattern pattern, URI[] uris, boolean isNullInclusive)
     59     throws Exception
     60     {
     61         if (uris!=null)
     62         {
     63             String[] patterns = (pattern==null?null:pattern.pattern().split(","));
     64 
     65             List<Pattern> subPatterns = new ArrayList<Pattern>();
     66             for (int i=0; patterns!=null && i<patterns.length;i++)
     67             {
     68                 subPatterns.add(Pattern.compile(patterns[i]));
     69             }
     70             if (subPatterns.isEmpty())
     71                 subPatterns.add(pattern);
     72 
     73             if (subPatterns.isEmpty())
     74             {
     75                 matchPatterns(null, uris, isNullInclusive);
     76             }
     77             else
     78             {
     79                 //for each subpattern, iterate over all the urls, processing those that match
     80                 for (Pattern p : subPatterns)
     81                 {
     82                     matchPatterns(p, uris, isNullInclusive);
     83                 }
     84             }
     85         }
     86     }
     87 
     88 
     89     public void matchPatterns (Pattern pattern, URI[] uris, boolean isNullInclusive)
     90     throws Exception
     91     {
     92         for (int i=0; i<uris.length;i++)
     93         {
     94             URI uri = uris[i];
     95             String s = uri.toString();
     96             if ((pattern == null && isNullInclusive)
     97                     ||
     98                     (pattern!=null && pattern.matcher(s).matches()))
     99             {
    100                 matched(uris[i]);
    101             }
    102         }
    103     }
    104 }
    105