Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 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 | |
| 20 | package org.eclipse.jetty.webapp; |
| 21 | |
| 22 | import java.io.InputStream; |
| 23 | import java.net.URI; |
| 24 | import java.net.URL; |
| 25 | import java.net.URLClassLoader; |
| 26 | import java.util.Locale; |
| 27 | import java.util.jar.JarEntry; |
| 28 | import java.util.jar.JarInputStream; |
| 29 | import java.util.regex.Pattern; |
| 30 | |
| 31 | import org.eclipse.jetty.util.log.Log; |
| 32 | import org.eclipse.jetty.util.log.Logger; |
| 33 | import org.eclipse.jetty.util.resource.Resource; |
| 34 | |
| 35 | /** |
| 36 | * JarScannerConfiguration |
| 37 | * |
| 38 | * Abstract base class for configurations that want to scan jars in |
| 39 | * WEB-INF/lib and the classloader hierarchy. |
| 40 | * |
| 41 | * Jar name matching based on regexp patterns is provided. |
| 42 | * |
| 43 | * Subclasses should implement the processEntry(URL jarUrl, JarEntry entry) |
| 44 | * method to handle entries in jar files whose names match the supplied |
| 45 | * pattern. |
| 46 | */ |
| 47 | public abstract class JarScanner extends org.eclipse.jetty.util.PatternMatcher |
| 48 | { |
| 49 | private static final Logger LOG = Log.getLogger(JarScanner.class); |
| 50 | |
| 51 | |
| 52 | public abstract void processEntry (URI jarUri, JarEntry entry); |
| 53 | |
| 54 | /** |
| 55 | * Find jar names from the provided list matching a pattern. |
| 56 | * |
| 57 | * If the pattern is null and isNullInclusive is true, then |
| 58 | * all jar names will match. |
| 59 | * |
| 60 | * A pattern is a set of acceptable jar names. Each acceptable |
| 61 | * jar name is a regex. Each regex can be separated by either a |
| 62 | * "," or a "|". If you use a "|" this or's together the jar |
| 63 | * name patterns. This means that ordering of the matches is |
| 64 | * unimportant to you. If instead, you want to match particular |
| 65 | * jar names, and you want to match them in order, you should |
| 66 | * separate the regexs with "," instead. |
| 67 | * |
| 68 | * Eg "aaa-.*\\.jar|bbb-.*\\.jar" |
| 69 | * Will iterate over the jar names and match |
| 70 | * in any order. |
| 71 | * |
| 72 | * Eg "aaa-*\\.jar,bbb-.*\\.jar" |
| 73 | * Will iterate over the jar names, matching |
| 74 | * all those starting with "aaa-" first, then "bbb-". |
| 75 | * |
| 76 | * @param pattern |
| 77 | * @param uris |
| 78 | * @param isNullInclusive if true, an empty pattern means all names match, if false, none match |
| 79 | * @throws Exception |
| 80 | */ |
| 81 | public void scan (Pattern pattern, URI[] uris, boolean isNullInclusive) |
| 82 | throws Exception |
| 83 | { |
| 84 | super.match(pattern, uris, isNullInclusive); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Find jar names from the classloader matching a pattern. |
| 89 | * |
| 90 | * If the pattern is null and isNullInclusive is true, then |
| 91 | * all jar names in the classloader will match. |
| 92 | * |
| 93 | * A pattern is a set of acceptable jar names. Each acceptable |
| 94 | * jar name is a regex. Each regex can be separated by either a |
| 95 | * "," or a "|". If you use a "|" this or's together the jar |
| 96 | * name patterns. This means that ordering of the matches is |
| 97 | * unimportant to you. If instead, you want to match particular |
| 98 | * jar names, and you want to match them in order, you should |
| 99 | * separate the regexs with "," instead. |
| 100 | * |
| 101 | * Eg "aaa-.*\\.jar|bbb-.*\\.jar" |
| 102 | * Will iterate over the jar names in the classloader and match |
| 103 | * in any order. |
| 104 | * |
| 105 | * Eg "aaa-*\\.jar,bbb-.*\\.jar" |
| 106 | * Will iterate over the jar names in the classloader, matching |
| 107 | * all those starting with "aaa-" first, then "bbb-". |
| 108 | * |
| 109 | * If visitParent is true, then the pattern is applied to the |
| 110 | * parent loader hierarchy. If false, it is only applied to the |
| 111 | * classloader passed in. |
| 112 | * |
| 113 | * @param pattern |
| 114 | * @param loader |
| 115 | * @param isNullInclusive |
| 116 | * @param visitParent |
| 117 | * @throws Exception |
| 118 | */ |
| 119 | public void scan (Pattern pattern, ClassLoader loader, boolean isNullInclusive, boolean visitParent) |
| 120 | throws Exception |
| 121 | { |
| 122 | while (loader!=null) |
| 123 | { |
| 124 | if (loader instanceof URLClassLoader) |
| 125 | { |
| 126 | URL[] urls = ((URLClassLoader)loader).getURLs(); |
| 127 | if (urls != null) |
| 128 | { |
| 129 | URI[] uris = new URI[urls.length]; |
| 130 | int i=0; |
| 131 | for (URL u : urls) |
| 132 | uris[i++] = u.toURI(); |
| 133 | scan (pattern, uris, isNullInclusive); |
| 134 | } |
| 135 | } |
| 136 | if (visitParent) |
| 137 | loader=loader.getParent(); |
| 138 | else |
| 139 | loader = null; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | |
| 144 | public void matched (URI uri) |
| 145 | throws Exception |
| 146 | { |
| 147 | LOG.debug("Search of {}",uri); |
| 148 | if (uri.toString().toLowerCase(Locale.ENGLISH).endsWith(".jar")) |
| 149 | { |
| 150 | |
| 151 | InputStream in = Resource.newResource(uri).getInputStream(); |
| 152 | if (in==null) |
| 153 | return; |
| 154 | |
| 155 | JarInputStream jar_in = new JarInputStream(in); |
| 156 | try |
| 157 | { |
| 158 | JarEntry entry = jar_in.getNextJarEntry(); |
| 159 | while (entry!=null) |
| 160 | { |
| 161 | processEntry(uri, entry); |
| 162 | entry = jar_in.getNextJarEntry(); |
| 163 | } |
| 164 | } |
| 165 | finally |
| 166 | { |
| 167 | jar_in.close(); |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | } |