jjg@416: /*
ohair@554:  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
jjg@416:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@416:  *
jjg@416:  * This code is free software; you can redistribute it and/or modify it
jjg@416:  * under the terms of the GNU General Public License version 2 only, as
jjg@416:  * published by the Free Software Foundation.
jjg@416:  *
jjg@416:  * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@416:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@416:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jjg@416:  * version 2 for more details (a copy is included in the LICENSE file that
jjg@416:  * accompanied this code).
jjg@416:  *
jjg@416:  * You should have received a copy of the GNU General Public License version
jjg@416:  * 2 along with this work; if not, write to the Free Software Foundation,
jjg@416:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@416:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
jjg@416:  */
jjg@416: 
jjg@416: import java.io.IOException;
jjg@416: import java.io.InputStream;
jjg@416: import java.util.Enumeration;
jjg@416: import java.util.jar.JarEntry;
jjg@416: import java.util.jar.JarFile;
jjg@416: 
jjg@416: import com.sun.tools.classfile.AccessFlags;
jjg@416: import com.sun.tools.classfile.ClassFile;
jjg@416: import com.sun.tools.classfile.ConstantPoolException;
jjg@416: import com.sun.tools.classfile.Method;
jjg@416: import java.util.Comparator;
jjg@416: import java.util.Set;
jjg@416: import java.util.TreeSet;
jjg@416: 
jjg@416: public class FindNativeFiles {
jjg@416:     public static void main(String[] args) throws IOException, ConstantPoolException {
jjg@416:         new FindNativeFiles().run(args);
jjg@416:     }
jjg@416: 
jjg@416:     public void run(String[] args) throws IOException, ConstantPoolException {
jjg@416:         JarFile jar = new JarFile(args[0]);
jjg@416:         Set<JarEntry> entries = getNativeClasses(jar);
jjg@416:         for (JarEntry e: entries) {
jjg@416:             String name = e.getName();
jjg@416:             String className = name.substring(0, name.length() - 6).replace("/", ".");
jjg@416:             System.out.println(className);
jjg@416:         }
jjg@416:     }
jjg@416: 
jjg@416:     Set<JarEntry> getNativeClasses(JarFile jar) throws IOException, ConstantPoolException {
jjg@416:         Set<JarEntry> results = new TreeSet<JarEntry>(new Comparator<JarEntry>() {
jjg@416:             public int compare(JarEntry o1, JarEntry o2) {
jjg@416:                 return o1.getName().compareTo(o2.getName());
jjg@416:             }
jjg@416:         });
jjg@416:         Enumeration<JarEntry> e = jar.entries();
jjg@416:         while (e.hasMoreElements()) {
jjg@416:             JarEntry je = e.nextElement();
jjg@416:             if (isNativeClass(jar, je))
jjg@416:                 results.add(je);
jjg@416:         }
jjg@416:         return results;
jjg@416:     }
jjg@416: 
jjg@416:     boolean isNativeClass(JarFile jar, JarEntry entry) throws IOException, ConstantPoolException {
jjg@416:         String name = entry.getName();
jjg@416:         if (name.startsWith("META-INF") || !name.endsWith(".class"))
jjg@416:             return false;
jjg@416:         //String className = name.substring(0, name.length() - 6).replace("/", ".");
jjg@416:         //System.err.println("check " + className);
jjg@416:         InputStream in = jar.getInputStream(entry);
jjg@416:         ClassFile cf = ClassFile.read(in);
jjg@416:         in.close();
jjg@416:         for (int i = 0; i < cf.methods.length; i++) {
jjg@416:             Method m = cf.methods[i];
jjg@416:             if (m.access_flags.is(AccessFlags.ACC_NATIVE)) {
jjg@416:                 // System.err.println(className);
jjg@416:                 return true;
jjg@416:             }
jjg@416:         }
jjg@416:         return false;
jjg@416:     }
jjg@416: }