| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 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.start; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Attempt to determine the version of the Jar File based on common version locations. |
| */ |
| public class JarVersion |
| { |
| private static JarEntry findEntry(JarFile jar, String regex) |
| { |
| Pattern pattern = Pattern.compile(regex); |
| Matcher matcher; |
| Enumeration<JarEntry> en = jar.entries(); |
| while (en.hasMoreElements()) |
| { |
| JarEntry entry = en.nextElement(); |
| matcher = pattern.matcher(entry.getName()); |
| if (matcher.matches()) |
| { |
| return entry; |
| } |
| } |
| |
| return null; |
| } |
| |
| private static String getBundleVersion(Manifest manifest) |
| { |
| Attributes attribs = manifest.getMainAttributes(); |
| if (attribs == null) |
| { |
| return null; |
| } |
| |
| String version = attribs.getValue("Bundle-Version"); |
| if (version == null) |
| { |
| return null; |
| } |
| |
| return stripV(version); |
| } |
| |
| private static String getMainManifestImplVersion(Manifest manifest) |
| { |
| Attributes attribs = manifest.getMainAttributes(); |
| if (attribs == null) |
| { |
| return null; |
| } |
| |
| String version = attribs.getValue(Attributes.Name.IMPLEMENTATION_VERSION); |
| if (version == null) |
| { |
| return null; |
| } |
| |
| return stripV(version); |
| } |
| |
| private static String getMavenVersion(JarFile jar) throws IOException |
| { |
| JarEntry pomProp = findEntry(jar,"META-INF/maven/.*/pom\\.properties$"); |
| if (pomProp == null) |
| { |
| return null; |
| } |
| |
| InputStream stream = null; |
| |
| try |
| { |
| stream = jar.getInputStream(pomProp); |
| Properties props = new Properties(); |
| props.load(stream); |
| |
| String version = props.getProperty("version"); |
| if (version == null) |
| { |
| return null; |
| } |
| |
| return stripV(version); |
| } |
| finally |
| { |
| FS.close(stream); |
| } |
| } |
| |
| private static String getSubManifestImplVersion(Manifest manifest) |
| { |
| Map<String, Attributes> entries = manifest.getEntries(); |
| |
| for (Attributes attribs : entries.values()) |
| { |
| if (attribs == null) |
| { |
| continue; // skip entry |
| } |
| |
| String version = attribs.getValue(Attributes.Name.IMPLEMENTATION_VERSION); |
| if (version == null) |
| { |
| continue; // empty, no value, skip it |
| } |
| |
| return stripV(version); |
| } |
| |
| return null; // no valid impl version entries found |
| } |
| |
| public static String getVersion(File file) |
| { |
| try (JarFile jar = new JarFile(file)) |
| { |
| String version = null; |
| |
| Manifest manifest = jar.getManifest(); |
| |
| if (manifest == null) |
| { |
| return "(none specified)"; |
| } |
| |
| version = getMainManifestImplVersion(manifest); |
| if (version != null) |
| { |
| return version; |
| } |
| |
| version = getSubManifestImplVersion(manifest); |
| if (version != null) |
| { |
| return version; |
| } |
| |
| version = getBundleVersion(manifest); |
| if (version != null) |
| { |
| return version; |
| } |
| |
| version = getMavenVersion(jar); |
| if (version != null) |
| { |
| return version; |
| } |
| |
| return "(none specified)"; |
| } |
| catch (IOException e) |
| { |
| return "(error: " + e.getClass().getSimpleName() + " " + e.getMessage() + ")"; |
| } |
| } |
| |
| private static String stripV(String version) |
| { |
| if (version.charAt(0) == 'v') |
| { |
| return version.substring(1); |
| } |
| |
| return version; |
| } |
| } |