Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.Enumeration;

 import java.util.jar.JarEntry;

 import java.util.jar.JarFile;

 import com.sun.tools.classfile.AccessFlags;

 import com.sun.tools.classfile.ClassFile;

 import com.sun.tools.classfile.ConstantPoolException;

 import com.sun.tools.classfile.Method;

 import java.util.Comparator;

 import java.util.Set;

 import java.util.TreeSet;

 public class FindNativeFiles {

     public static void main(String[] args) throws IOException, ConstantPoolException {

         new FindNativeFiles().run(args);

     }

     public void run(String[] args) throws IOException, ConstantPoolException {

         JarFile jar = new JarFile(args[0]);

         Set<JarEntry> entries = getNativeClasses(jar);

         for (JarEntry e: entries) {

             String name = e.getName();

             String className = name.substring(0, name.length() - 6).replace("/", ".");

             System.out.println(className);

         }

     }

     Set<JarEntry> getNativeClasses(JarFile jar) throws IOException, ConstantPoolException {

         Set<JarEntry> results = new TreeSet<JarEntry>(new Comparator<JarEntry>() {

             public int compare(JarEntry o1, JarEntry o2) {

                 return o1.getName().compareTo(o2.getName());

             }

         });

         Enumeration<JarEntry> e = jar.entries();

         while (e.hasMoreElements()) {

             JarEntry je = e.nextElement();

             if (isNativeClass(jar, je))

                 results.add(je);

         }

         return results;

     }

     boolean isNativeClass(JarFile jar, JarEntry entry) throws IOException, ConstantPoolException {

         String name = entry.getName();

         if (name.startsWith("META-INF") || !name.endsWith(".class"))

             return false;

         //String className = name.substring(0, name.length() - 6).replace("/", ".");

         //System.err.println("check " + className);

         InputStream in = jar.getInputStream(entry);

         ClassFile cf = ClassFile.read(in);

         in.close();

         for (int i = 0; i < cf.methods.length; i++) {

             Method m = cf.methods[i];

             if (m.access_flags.is(AccessFlags.ACC_NATIVE)) {

                 // System.err.println(className);

                 return true;

             }

         }

         return false;

     }

 }