1 /*
   2  * Copyright (c) 2017, 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 package jdk.tools.jaotc.collect;
  24 
  25 import java.nio.file.Path;
  26 import java.util.function.BiConsumer;
  27 
  28 public interface ClassSource {
  29     static boolean pathIsClassFile(Path entry) {
  30         String fileName = entry.getFileName().toString();
  31         return fileName.endsWith(".class") && !fileName.endsWith("module-info.class");
  32     }
  33 
  34     static String stripRoot(Path path) {
  35       if (path.getRoot() != null) {
  36         String root = path.getRoot().toString();
  37         String filename = path.toString().substring(root.length());
  38         String separator = path.getFileSystem().getSeparator();
  39         while (filename.startsWith(separator)) {
  40           filename = filename.substring(separator.length());
  41         }
  42         return filename;
  43       }
  44 
  45       return path.toString();
  46     }
  47 
  48     static String makeClassName(Path path) {
  49         String fileName = path.toString();
  50 
  51         if (!fileName.endsWith(".class")) {
  52             throw new IllegalArgumentException("File doesn't end with .class: '" + fileName + "'");
  53         }
  54 
  55         fileName = stripRoot(path);
  56 
  57         String className = fileName.substring(0, fileName.length() - ".class".length());
  58         className = className.replace(path.getFileSystem().getSeparator(), ".");
  59         return className;
  60     }
  61 
  62     void eachClass(BiConsumer<String, ClassLoader> consumer);
  63 }