Importing upstream Jetty jetty-9.2.1.v20140609

[gigi.git] / lib / jetty / org / eclipse / jetty / util / PatternMatcher.java

diff --git a/lib/jetty/org/eclipse/jetty/util/PatternMatcher.java b/lib/jetty/org/eclipse/jetty/util/PatternMatcher.java
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+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.util;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public abstract class PatternMatcher
+{
+    public abstract void matched (URI uri) throws Exception;
+    
+    
+    /**
+     * Find jar names from the provided list matching a pattern.
+     * 
+     * If the pattern is null and isNullInclusive is true, then
+     * all jar names will match.
+     * 
+     * A pattern is a set of acceptable jar names. Each acceptable
+     * jar name is a regex. Each regex can be separated by either a
+     * "," or a "|". If you use a "|" this or's together the jar
+     * name patterns. This means that ordering of the matches is
+     * unimportant to you. If instead, you want to match particular
+     * jar names, and you want to match them in order, you should
+     * separate the regexs with "," instead. 
+     * 
+     * Eg "aaa-.*\\.jar|bbb-.*\\.jar"
+     * Will iterate over the jar names and match
+     * in any order.
+     * 
+     * Eg "aaa-*\\.jar,bbb-.*\\.jar"
+     * Will iterate over the jar names, matching
+     * all those starting with "aaa-" first, then "bbb-".
+     *
+     * @param pattern the pattern
+     * @param uris the uris to test the pattern against
+     * @param isNullInclusive if true, an empty pattern means all names match, if false, none match
+     * @throws Exception
+     */
+    public void match (Pattern pattern, URI[] uris, boolean isNullInclusive)
+    throws Exception
+    {
+        if (uris!=null)
+        {
+            String[] patterns = (pattern==null?null:pattern.pattern().split(","));
+
+            List<Pattern> subPatterns = new ArrayList<Pattern>();
+            for (int i=0; patterns!=null && i<patterns.length;i++)
+            {
+                subPatterns.add(Pattern.compile(patterns[i]));
+            }
+            if (subPatterns.isEmpty())
+                subPatterns.add(pattern);
+
+            if (subPatterns.isEmpty())
+            {
+                matchPatterns(null, uris, isNullInclusive);
+            }
+            else
+            {
+                //for each subpattern, iterate over all the urls, processing those that match
+                for (Pattern p : subPatterns)
+                {
+                    matchPatterns(p, uris, isNullInclusive);
+                }
+            }
+        }
+    }
+
+
+    public void matchPatterns (Pattern pattern, URI[] uris, boolean isNullInclusive)
+    throws Exception
+    {
+        for (int i=0; i<uris.length;i++)
+        {
+            URI uri = uris[i];
+            String s = uri.toString();
+            if ((pattern == null && isNullInclusive)
+                    ||
+                    (pattern!=null && pattern.matcher(s).matches()))
+            {
+                matched(uris[i]);
+            }
+        }
+    }
+}