1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package sun.hotspot.tools.ctw;
  25 
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.nio.file.Files;
  29 import java.nio.file.Path;
  30 import java.util.jar.JarEntry;
  31 import java.util.jar.JarFile;
  32 import java.util.stream.Stream;
  33 
  34 /**
  35  * Handler for jar-files containing classes to compile.
  36  */
  37 public class ClassPathJarEntry extends PathHandler.PathEntry {
  38     private final JarFile jarFile;
  39 
  40     public ClassPathJarEntry(Path root) {
  41         super(root);
  42         if (!Files.exists(root)) {
  43             throw new Error(root + " file not found");
  44         }
  45         try {
  46             jarFile = new JarFile(root.toFile());
  47         } catch (IOException e) {
  48             throw new Error("can not read " + root + " : " + e.getMessage(), e);
  49         }
  50     }
  51 
  52     @Override
  53     protected Stream<String> classes() {
  54         return jarFile.stream()
  55                       .map(JarEntry::getName)
  56                       .filter(Utils::isClassFile)
  57                       .map(Utils::fileNameToClassName);
  58     }
  59 
  60     @Override
  61     protected String description() {
  62         return "# jar: " + root;
  63     }
  64 
  65     @Override
  66     protected byte[] findByteCode(String classname) {
  67         try {
  68             String filename = Utils.classNameToFileName(classname);
  69             JarEntry entry = jarFile.getJarEntry(filename);
  70 
  71             if (entry == null) {
  72                 return null;
  73             }
  74 
  75             try (InputStream is = jarFile.getInputStream(entry)) {
  76                 return is.readAllBytes();
  77             }
  78 
  79         } catch (IOException e) {
  80             e.printStackTrace(CompileTheWorld.ERR);
  81             return null;
  82         }
  83     }
  84 }
  85