org.apache.bcel.classfile.ClassParser Java Examples

/**
 * Override this method to create you own classes on the fly. The
 * name contains the special token $$BCEL$$. Everything before that
 * token is considered to be a package name. You can encode your own
 * arguments into the subsequent string. You must ensure however not
 * to use any "illegal" characters, i.e., characters that may not
 * appear in a Java class name too
 * <p>
 * The default implementation interprets the string as a encoded compressed
 * Java class, unpacks and decodes it with the Utility.decode() method, and
 * parses the resulting byte array and returns the resulting JavaClass object.
 * </p>
 *
 * @param class_name compressed byte code with "$$BCEL$$" in it
 */
protected JavaClass createClass( final String class_name ) {
    final int index = class_name.indexOf(BCEL_TOKEN);
    final String real_name = class_name.substring(index + BCEL_TOKEN.length());
    JavaClass clazz = null;
    try {
        final byte[] bytes = Utility.decode(real_name, true);
        final ClassParser parser = new ClassParser(new ByteArrayInputStream(bytes), "foo");
        clazz = parser.parse();
    } catch (final IOException e) {
        e.printStackTrace();
        return null;
    }
    // Adapt the class name to the passed value
    final ConstantPool cp = clazz.getConstantPool();
    final ConstantClass cl = (ConstantClass) cp.getConstant(clazz.getClassNameIndex(),
            Const.CONSTANT_Class);
    final ConstantUtf8 name = (ConstantUtf8) cp.getConstant(cl.getNameIndex(),
            Const.CONSTANT_Utf8);
    name.setBytes(class_name.replace('.', '/'));
    return clazz;
}
 

public static void main(final String[] argv) throws Exception {
    for (final String arg : argv) {
        if (arg.endsWith(".class")) {
            final JavaClass java_class = new ClassParser(arg).parse();
            final ConstantPool constants = java_class.getConstantPool();
            final String file_name = arg.substring(0, arg.length() - 6) + "_hello.class";
            cp = new ConstantPoolGen(constants);

            helloifyClassName(java_class);

            out = cp.addFieldref("java.lang.System", "out", "Ljava/io/PrintStream;");
            println = cp.addMethodref("java.io.PrintStream", "println", "(Ljava/lang/String;)V");
            // Patch all methods.
            final Method[] methods = java_class.getMethods();

            for (int j = 0; j < methods.length; j++) {
                methods[j] = helloifyMethod(methods[j]);
            }

            // Finally dump it back to a file.
            java_class.setConstantPool(cp.getFinalConstantPool());
            java_class.dump(file_name);
        }
    }
}
 

public void addClass(final InputStream classStream, final boolean doNotify) throws IOException {
  final JavaClass jclazz = new ClassParser(classStream, null).parse();

  String packageName = jclazz.getPackageName();
  if (packageName == null || packageName.length() == 0) {
    packageName = "<default>";
  }

  PackageItem packageItem = getPackageForName(packageName);
  if (packageItem == null) {
    packageItem = addPackage(packageName);
  }

  packageItem.addClass(new ClassItem(packageItem, jclazz));

  if (doNotify) {
    for (final TreeModelListener l : this.treeModelListeners) {
      l.treeStructureChanged(new TreeModelEvent(this, new TreePath(this)));
    }
  }
}
 

private ClassNode fillFromJar(File file) {

        ClassNode rootNode = new ClassNode(file.getName());
        try {
            JarFile theJar = new JarFile(file);
            Enumeration<? extends JarEntry> en = theJar.entries();

            while (en.hasMoreElements()) {
                JarEntry entry = en.nextElement();
                if (entry.getName().endsWith(".class")) {
                    ClassParser cp = new ClassParser(
                            theJar.getInputStream(entry), entry.getName());
                    JavaClass jc = cp.parse();
                    ClassInfo classInfo = new ClassInfo(jc.getClassName(),
                            jc.getMethods().length);
                    rootNode.add(classInfo);
                }
            }
        } catch (IOException e) {
            System.err.println("Error reading file: " + file + ". " + e.getMessage());
            e.printStackTrace(System.err);
        }

        return rootNode;
    }
 

public static void main(final String[] argv) throws Exception {
    JavaClass clazz;

    if ((clazz = Repository.lookupClass(argv[0])) == null) {
        clazz = new ClassParser(argv[0]).parse(); // May throw IOException
    }

    final ClassGen cg = new ClassGen(clazz);

    for (final Method method : clazz.getMethods()) {
        final MethodGen mg = new MethodGen(method, cg.getClassName(), cg.getConstantPool());
        cg.replaceMethod(method, mg.getMethod());
    }

    for (final Field field : clazz.getFields()) {
        final FieldGen fg = new FieldGen(field, cg.getConstantPool());
        cg.replaceField(field, fg.getField());
    }

    cg.getJavaClass().dump(clazz.getClassName() + ".clazz");
}
 

public static void main(final String[] argv) throws Exception {
    final String[] file_name = new String[argv.length];
    int files = 0;

    if (argv.length < 3) {
        System.err.println("Usage: patch <oldstring> <newstring> file1.class ...");
        System.exit(-1);
    }

    for (int i = 2; i < argv.length; i++) {
        file_name[files++] = argv[i];
    }

    for (int i = 0; i < files; i++) {
        final ClassParser parser = new ClassParser(file_name[i]);
        final JavaClass java_class = parser.parse();

        patchIt(argv[0], argv[1], java_class.getConstantPool().getConstantPool());

        // Dump the changed class to a new file
        java_class.dump("_" + file_name[i]);
        System.out.println("Results saved in: _" + file_name[i]);
    }
}
 

public static void main(final String[] argv) {
    JavaClass java_class;

    try {
        if (argv.length == 0) {
            System.err.println("transitive: No input files specified");
        } else {
            if ((java_class = Repository.lookupClass(argv[0])) == null) {
                java_class = new ClassParser(argv[0]).parse();
            }

            final TransitiveHull hull = new TransitiveHull(java_class);

            hull.start();
            System.out.println(Arrays.asList(hull.getClassNames()));
        }
    } catch (final Exception e) {
        e.printStackTrace();
    }
}
 

/**
 * Lookup a JavaClass object from the Class Name provided.
 */
@Override
public JavaClass loadClass(final String className) throws ClassNotFoundException {
    final String classFile = className.replace('.', '/');
    JavaClass RC = findClass(className);
    if (RC != null) {
        return RC;
    }
    try (InputStream is = loader.getResourceAsStream(classFile + ".class")) {
        if (is == null) {
            throw new ClassNotFoundException(className + " not found.");
        }
        final ClassParser parser = new ClassParser(is, className);
        RC = parser.parse();
        storeClass(RC);
        return RC;
    } catch (final IOException e) {
        throw new ClassNotFoundException(className + " not found: " + e, e);
    }
}
 

private void testJar(final File file) throws Exception {
    System.out.println(file);
    try (JarFile jar = new JarFile(file)) {
        final Enumeration<JarEntry> en = jar.entries();
        while (en.hasMoreElements()) {
            final JarEntry jarEntry = en.nextElement();
            final String name = jarEntry.getName();
            if (name.endsWith(".class")) {
                // System.out.println("- " + name);
                try (InputStream inputStream = jar.getInputStream(jarEntry)) {
                    final ClassParser classParser = new ClassParser(inputStream, name);
                    final JavaClass javaClass = classParser.parse();
                    for (final Method method : javaClass.getMethods()) {
                        compare(name, method);
                    }
                }
            }
        }
    }
}
 

private boolean embeddedNameMismatch(ZipFile zipInputFile, ZipEntry ze) throws IOException {
    InputStream zipIn = zipInputFile.getInputStream(ze);
    String name = ze.getName();
    JavaClass j = new ClassParser(zipIn, name).parse();
    zipIn.close();
    String className = j.getClassName();
    String computedFileName = ClassName.toSlashedClassName(className) + ".class";
    if (name.charAt(0) == '1') {
        System.out.println(name);
        System.out.println("  " + className);
    }
    if (computedFileName.equals(name)) {
        return false;
    }
    System.out.println("In " + name + " found " + className);
    return true;
}
 

@Test
public void testListInnerClasses() throws IOException {
  InputStream classFileInputStream = URLClassLoader.getSystemResourceAsStream(
      EXAMPLE_CLASS_FILE);
  ClassParser parser = new ClassParser(classFileInputStream, EXAMPLE_CLASS_FILE);
  JavaClass javaClass = parser.parse();

  Set<String> innerClassNames = ClassDumper.listInnerClassNames(javaClass);
  Truth.assertThat(innerClassNames).containsExactly(
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreFutureStub",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreMethodDescriptorSupplier",
      "com.google.firestore.v1beta1.FirestoreGrpc$1",
      "com.google.firestore.v1beta1.FirestoreGrpc$MethodHandlers",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreStub",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreBaseDescriptorSupplier",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreBlockingStub",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreImplBase",
      "com.google.firestore.v1beta1.FirestoreGrpc$FirestoreFileDescriptorSupplier"
  );
}
 

static JavaClass getJavaClass(final String name) throws ClassNotFoundException, IOException {
    JavaClass java_class;
    if ((java_class = Repository.lookupClass(name)) == null) {
        java_class = new ClassParser(name).parse(); // May throw IOException
    }
    return java_class;
}
 

@Fuzz
public void testWithInputStream(InputStream inputStream) throws IOException {
    JavaClass clazz;
    try {
        clazz = new ClassParser(inputStream, "Hello.class").parse();
    } catch (ClassFormatException e) {
        // ClassFormatException thrown by the parser is just invalid input
        Assume.assumeNoException(e);
        return;
    }

    // Any non-IOException thrown here should be marked a failure
    // (including ClassFormatException)
    verifyJavaClass(clazz);
}
 

private void find(final Path path) throws IOException {
    final Path name = path.getFileName();
    if (name != null && matcher.matches(name)) {
        try (final InputStream inputStream = Files.newInputStream(path)) {
            final ClassParser classParser = new ClassParser(inputStream, name.toAbsolutePath().toString());
            final JavaClass javaClass = classParser.parse();
            Assert.assertNotNull(javaClass);
        }

    }
}
 

public static void main(final String[] argv) throws Exception {
    for (final String class_name : argv) {
        JavaClass java_class = Repository.lookupClass(class_name);

        if (java_class == null) {
            java_class = new ClassParser(class_name).parse();
        }

        final ConstantPoolGen cp = new ConstantPoolGen(java_class.getConstantPool());

        for (final Method m : java_class.getMethods()) {
            if (!(m.isAbstract() || m.isNative())) {
                final MethodGen mg = new MethodGen(m, class_name, cp);

                final int compiled_stack = mg.getMaxStack();
                final int compiled_locals = mg.getMaxLocals();
                mg.setMaxStack(); // Recompute value
                mg.setMaxLocals();
                final int computed_stack = mg.getMaxStack();
                final int computed_locals = mg.getMaxLocals();

                mg.getInstructionList().dispose(); // Reuse instruction handles

                System.out.println(m);

                if (computed_stack == compiled_stack) {
                    System.out.println("Stack ok(" + computed_stack + ")");
                } else {
                    System.out.println("\nCompiled stack size " + compiled_stack + " computed size " + computed_stack);
                }

                if (computed_locals == compiled_locals) {
                    System.out.println("Locals ok(" + computed_locals + ")");
                } else {
                    System.out.println("\nCompiled locals " + compiled_locals + " computed size " + computed_locals);
                }
            }
        }
    }
}
 

@Benchmark
public void parser(Blackhole bh) throws IOException {
    JarFile jar = getJarFile();

    for (JarEntry entry : getClasses(jar)) {
        byte[] bytes = IOUtils.toByteArray(jar.getInputStream(entry));

        JavaClass clazz = new ClassParser(new ByteArrayInputStream(bytes), entry.getName()).parse();
        bh.consume(clazz);
    }

    jar.close();
}
 

@Benchmark
public void generator(Blackhole bh) throws IOException {
    JarFile jar = getJarFile();

    for (JarEntry entry : getClasses(jar)) {
        byte[] bytes = IOUtils.toByteArray(jar.getInputStream(entry));

        JavaClass clazz = new ClassParser(new ByteArrayInputStream(bytes), entry.getName()).parse();

        ClassGen cg = new ClassGen(clazz);

        for (Method m : cg.getMethods()) {
            MethodGen mg = new MethodGen(m, cg.getClassName(), cg.getConstantPool());
            InstructionList il = mg.getInstructionList();

            if (il != null) {
                mg.getInstructionList().setPositions();
                mg.setMaxLocals();
                mg.setMaxStack();
            }
            cg.replaceMethod(m, mg.getMethod());
        }

        bh.consume(cg.getJavaClass().getBytes());
    }

    jar.close();
}
 

public void testConvertJavaUtil() throws Exception {
    final File outputDir = new File("target/test-output/html");
    if (!outputDir.mkdirs()) { // either was not created or already existed
        Assert.assertTrue(outputDir.isDirectory()); // fail if missing
    }

    try (FileInputStream file = new FileInputStream("target/test-classes/Java8Example.class")) {

        final ClassParser parser = new ClassParser(file, "Java8Example.class");

        new Class2HTML(parser.parse(), outputDir.getAbsolutePath() + "/");
    }
}
 

public static void main(final String[] argv) throws Exception {
    JavaClass java_class;

    if (argv.length == 0) {
        System.err.println("disassemble: No input files specified");
        return;
    }

    for (final String arg : argv) {
        if ((java_class = Repository.lookupClass(arg)) == null) {
            java_class = new ClassParser(arg).parse();
        }

        String class_name = java_class.getClassName();
        final int index = class_name.lastIndexOf('.');
        final String path = class_name.substring(0, index + 1).replace('.', File.separatorChar);
        class_name = class_name.substring(index + 1);

        if (!path.equals("")) {
            final File f = new File(path);
            f.mkdirs();
        }

        final String name = path + class_name + ".j";
        final FileOutputStream out = new FileOutputStream(name);
        new JasminVisitor(java_class, out).disassemble();
        System.out.println("File dumped to: " + name);
    }
}
 

byte[] nullAdaptClass(final InputStream is, final String name)
        throws Exception
{
    JavaClass jc = new ClassParser(is, name + ".class").parse();
    ClassGen cg = new ClassGen(jc);
    ConstantPoolGen cp = cg.getConstantPool();
    Method[] ms = cg.getMethods();
    for (int j = 0; j < ms.length; ++j) {
        MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
        boolean lv = ms[j].getLocalVariableTable() == null;
        boolean ln = ms[j].getLineNumberTable() == null;
        if (lv) {
            mg.removeLocalVariables();
        }
        if (ln) {
            mg.removeLineNumbers();
        }
        mg.stripAttributes(skipDebug);
        InstructionList il = mg.getInstructionList();
        if (il != null) {
            InstructionHandle ih = il.getStart();
            while (ih != null) {
                ih = ih.getNext();
            }
            if (compute) {
                mg.setMaxStack();
                mg.setMaxLocals();
            }
        }
        cg.replaceMethod(ms[j], mg.getMethod());
    }
    return cg.getJavaClass().getBytes();
}
 

byte[] nullAdaptClass(final InputStream is, final String name)
        throws Exception
{
    JavaClass jc = new ClassParser(is, name + ".class").parse();
    ClassGen cg = new ClassGen(jc);
    ConstantPoolGen cp = cg.getConstantPool();
    Method[] ms = cg.getMethods();
    for (int j = 0; j < ms.length; ++j) {
        MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
        boolean lv = ms[j].getLocalVariableTable() == null;
        boolean ln = ms[j].getLineNumberTable() == null;
        if (lv) {
            mg.removeLocalVariables();
        }
        if (ln) {
            mg.removeLineNumbers();
        }
        mg.stripAttributes(skipDebug);
        InstructionList il = mg.getInstructionList();
        if (il != null) {
            InstructionHandle ih = il.getStart();
            while (ih != null) {
                ih = ih.getNext();
            }
            if (compute) {
                mg.setMaxStack();
                mg.setMaxLocals();
            }
        }
        cg.replaceMethod(ms[j], mg.getMethod());
    }
    return cg.getJavaClass().getBytes();
}
 

/**
 * Test driver.
 */
public static void main(String[] argv) throws Exception {
    if (argv.length != 1) {
        System.err.println("Usage: " + BetterCFGBuilder2.class.getName() + " <class file>");
        System.exit(1);
    }

    String methodName = SystemProperties.getProperty("cfgbuilder.method");

    JavaClass jclass = new ClassParser(argv[0]).parse();
    ClassGen classGen = new ClassGen(jclass);

    Method[] methodList = jclass.getMethods();
    for (Method method : methodList) {
        if (method.isAbstract() || method.isNative()) {
            continue;
        }

        if (methodName != null && !method.getName().equals(methodName)) {
            continue;
        }

        MethodDescriptor descriptor = DescriptorFactory.instance().getMethodDescriptor(jclass, method);
        MethodGen methodGen = new MethodGen(method, jclass.getClassName(), classGen.getConstantPool());

        CFGBuilder cfgBuilder = new BetterCFGBuilder2(descriptor, methodGen);
        cfgBuilder.build();

        CFG cfg = cfgBuilder.getCFG();

        CFGPrinter cfgPrinter = new CFGPrinter(cfg);
        System.out.println("---------------------------------------------------------------------");
        System.out.println("Method: " + SignatureConverter.convertMethodSignature(methodGen));
        System.out.println("---------------------------------------------------------------------");
        cfgPrinter.print(System.out);
    }
}
 

/**
 * Look up a class from the classpath.
 *
 * @param className
 *            name of class to look up
 * @return the JavaClass object for the class
 * @throws ClassNotFoundException
 *             if the class couldn't be found
 */
public JavaClass lookupClass(String className) throws ClassNotFoundException {
    if (classesThatCantBeFound.contains(className)) {
        throw new ClassNotFoundException("Error while looking for class " + className + ": class not found");
    }
    String resourceName = className.replace('.', '/') + ".class";
    InputStream in = null;
    boolean parsedClass = false;

    try {

        in = getInputStreamForResource(resourceName);
        if (in == null) {
            classesThatCantBeFound.add(className);
            throw new ClassNotFoundException("Error while looking for class " + className + ": class not found");
        }

        ClassParser classParser = new ClassParser(in, resourceName);
        JavaClass javaClass = classParser.parse();
        parsedClass = true;

        return javaClass;
    } catch (IOException e) {
        classesThatCantBeFound.add(className);
        throw new ClassNotFoundException("IOException while looking for class " + className, e);
    } finally {
        if (in != null && !parsedClass) {
            try {
                in.close();
            } catch (IOException ignore) {
                // Ignore
            }
        }
    }
}
 

private static void printClass(ClassParser parser) throws IOException {
    JavaClass java_class;
    java_class = parser.parse();

    if (superClasses) {
        try {
            while (java_class != null) {
                System.out.print(java_class.getClassName() + "  ");
                java_class = java_class.getSuperClass();
            }
        } catch (ClassNotFoundException e) {
            System.out.println(e.getMessage());

        }
        System.out.println();
        return;
    }
    if (constants || code) {
        System.out.println(java_class); // Dump the contents
    }
    if (constants) {
        System.out.println(java_class.getConstantPool());
    }

    if (code) {
        printCode(java_class.getMethods());
    }
}
 

byte[] counterAdaptClass(final InputStream is, final String name)
        throws Exception
{
    JavaClass jc = new ClassParser(is, name + ".class").parse();
    ClassGen cg = new ClassGen(jc);
    ConstantPoolGen cp = cg.getConstantPool();
    if (!cg.isInterface()) {
        FieldGen fg = new FieldGen(ACC_PUBLIC,
                Type.getType("I"),
                "_counter",
                cp);
        cg.addField(fg.getField());
    }
    Method[] ms = cg.getMethods();
    for (int j = 0; j < ms.length; ++j) {
        MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
        if (!mg.getName().equals("<init>") && !mg.isStatic()
                && !mg.isAbstract() && !mg.isNative())
        {
            if (mg.getInstructionList() != null) {
                InstructionList il = new InstructionList();
                il.append(new ALOAD(0));
                il.append(new ALOAD(0));
                il.append(new GETFIELD(cp.addFieldref(name, "_counter", "I")));
                il.append(new ICONST(1));
                il.append(new IADD());
                il.append(new PUTFIELD(cp.addFieldref(name, "_counter", "I")));
                mg.getInstructionList().insert(il);
                mg.setMaxStack(Math.max(mg.getMaxStack(), 2));
                boolean lv = ms[j].getLocalVariableTable() == null;
                boolean ln = ms[j].getLineNumberTable() == null;
                if (lv) {
                    mg.removeLocalVariables();
                }
                if (ln) {
                    mg.removeLineNumbers();
                }
                cg.replaceMethod(ms[j], mg.getMethod());
            }
        }
    }
    return cg.getJavaClass().getBytes();
}
 

byte[] counterAdaptClass(final InputStream is, final String name)
        throws Exception
{
    JavaClass jc = new ClassParser(is, name + ".class").parse();
    ClassGen cg = new ClassGen(jc);
    ConstantPoolGen cp = cg.getConstantPool();
    if (!cg.isInterface()) {
        FieldGen fg = new FieldGen(ACC_PUBLIC,
                Type.getType("I"),
                "_counter",
                cp);
        cg.addField(fg.getField());
    }
    Method[] ms = cg.getMethods();
    for (int j = 0; j < ms.length; ++j) {
        MethodGen mg = new MethodGen(ms[j], cg.getClassName(), cp);
        if (!mg.getName().equals("<init>") && !mg.isStatic()
                && !mg.isAbstract() && !mg.isNative())
        {
            if (mg.getInstructionList() != null) {
                InstructionList il = new InstructionList();
                il.append(new ALOAD(0));
                il.append(new ALOAD(0));
                il.append(new GETFIELD(cp.addFieldref(name, "_counter", "I")));
                il.append(new ICONST(1));
                il.append(new IADD());
                il.append(new PUTFIELD(cp.addFieldref(name, "_counter", "I")));
                mg.getInstructionList().insert(il);
                mg.setMaxStack(Math.max(mg.getMaxStack(), 2));
                boolean lv = ms[j].getLocalVariableTable() == null;
                boolean ln = ms[j].getLineNumberTable() == null;
                if (lv) {
                    mg.removeLocalVariables();
                }
                if (ln) {
                    mg.removeLineNumbers();
                }
                cg.replaceMethod(ms[j], mg.getMethod());
            }
        }
    }
    return cg.getJavaClass().getBytes();
}
 

/**
 * Get applicable class names to be "javahed"
 */

private void discoverAdditionalJNIClassName()
    throws MojoExecutionException
{
    if ( !this.javahSearchJNIFromDependencies )
    {
        return;
    }

    // scan the immediate dependency list for jni classes

    List<Artifact> artifacts = this.getJavahArtifacts();

    for ( Iterator<Artifact> iter = artifacts.iterator(); iter.hasNext(); )
    {
        Artifact artifact = iter.next();

        this.getLog().info( "Parsing " + artifact.getFile() + " for native classes." );

        try
        {
            ZipFile zipFile = new ZipFile( artifact.getFile() );
            Enumeration<? extends ZipEntry> zipEntries = zipFile.entries();

            while ( zipEntries.hasMoreElements() )
            {
                ZipEntry zipEntry = zipEntries.nextElement();

                if ( "class".equals( FileUtils.extension( zipEntry.getName() ) ) )
                {
                    ClassParser parser = new ClassParser( artifact.getFile().getPath(), zipEntry.getName() );

                    JavaClass clazz = parser.parse();

                    Method[] methods = clazz.getMethods();

                    for ( int j = 0; j < methods.length; ++j )
                    {
                        if ( methods[j].isNative() )
                        {
                            javahClassNames.add( clazz.getClassName() );

                            this.getLog().info( "Found native class: " + clazz.getClassName() );

                            break;
                        }
                    }
                }
            } // endwhile

            // not full proof
            zipFile.close();
        }
        catch ( IOException ioe )
        {
            throw new MojoExecutionException( "Error searching for native class in " + artifact.getFile(), ioe );
        }
    }

}
 

public static void main(String argv[]) throws IOException {
    String[] file_name = new String[argv.length];
    int files = 0;
    String zip_file = null;

    /*
     * Parse command line arguments.
     */
    for (int i = 0; i < argv.length; i++) {
        if (argv[i].charAt(0) == '-') { // command line switch
            if ("-constants".equals(argv[i])) {
                constants = true;
            } else if ("-code".equals(argv[i])) {
                code = true;
            } else if ("-super".equals(argv[i])) {
                superClasses = true;
            } else if ("-zip".equals(argv[i])) {
                zip_file = argv[++i];
            }
        } else if (argv[i].endsWith(".zip") || argv[i].endsWith(".jar")) {
            zip_file = argv[i];
        } else { // add file name to list
            file_name[files++] = argv[i];
        }
    }

    if (!constants) {
        code = true;
    }
    if (files == 0 && zip_file == null) {
        System.err.println("list: No input files specified");
    } else if (zip_file != null) {
        for (int i = 0; i < files; i++) {
            file_name[i] = file_name[i].replace('.', '/');
        }
        try (ZipFile z = new ZipFile(zip_file)) {
            TreeSet<ZipEntry> zipEntries = new TreeSet<>(new ZipEntryComparator());
            for (Enumeration<? extends ZipEntry> e = z.entries(); e.hasMoreElements();) {
                zipEntries.add(e.nextElement());
            }

            for (ZipEntry ze : zipEntries) {
                String name = ze.getName();
                if (!name.endsWith(".class")) {
                    continue;
                }
                checkMatch: if (files > 0) {
                    for (int i = 0; i < files; i++) {
                        if (name.indexOf(file_name[i]) >= 0) {
                            break checkMatch;
                        }
                    }
                    continue;
                }
                printClass(new ClassParser(z.getInputStream(ze), name));

            }
        }
    } else {
        for (int i = 0; i < files; i++) {
            if (file_name[i].endsWith(".class")) {
                printClass(new ClassParser(file_name[i]));
            }
        }
    }
}
 

private static void test(final File lib) throws IOException {
    final NanoTimer total = new NanoTimer();
    final NanoTimer parseTime = new NanoTimer();
    final NanoTimer cgenTime = new NanoTimer();
    final NanoTimer mgenTime = new NanoTimer();
    final NanoTimer mserTime = new NanoTimer();
    final NanoTimer serTime = new NanoTimer();

    System.out.println("parsing " + lib);

    total.start();
    try (JarFile jar = new JarFile(lib)) {
        final Enumeration<?> en = jar.entries();

        while (en.hasMoreElements()) {
            final JarEntry e = (JarEntry) en.nextElement();
            if (e.getName().endsWith(".class")) {
                byte[] bytes;
                try (InputStream in = jar.getInputStream(e)) {
                    bytes = read(in);
                }

                parseTime.start();
                final JavaClass clazz = new ClassParser(new ByteArrayInputStream(bytes), e.getName()).parse();
                parseTime.stop();

                cgenTime.start();
                final ClassGen cg = new ClassGen(clazz);
                cgenTime.stop();

                final Method[] methods = cg.getMethods();
                for (final Method m : methods) {
                    mgenTime.start();
                    final MethodGen mg = new MethodGen(m, cg.getClassName(), cg.getConstantPool());
                    final InstructionList il = mg.getInstructionList();
                    mgenTime.stop();

                    mserTime.start();
                    if (il != null) {
                        mg.getInstructionList().setPositions();
                        mg.setMaxLocals();
                        mg.setMaxStack();
                    }
                    cg.replaceMethod(m, mg.getMethod());
                    mserTime.stop();
                }

                serTime.start();
                cg.getJavaClass().getBytes();
                serTime.stop();
            }
        }
    }
    total.stop();
    if (REPORT) {
        System.out.println("ClassParser.parse: " + parseTime);
        System.out.println("ClassGen.init: " + cgenTime);
        System.out.println("MethodGen.init: " + mgenTime);
        System.out.println("MethodGen.getMethod: " + mserTime);
        System.out.println("ClassGen.getJavaClass.getBytes: " + serTime);
        System.out.println("Total: " + total);
        System.out.println();
    }
}
 

private void addClassFileMetadata(GraphRewrite event, EvaluationContext context, JavaClassFileModel javaClassFileModel)
{
    try (FileInputStream fis = new FileInputStream(javaClassFileModel.getFilePath()))
    {
        final ClassParser parser = new ClassParser(fis, javaClassFileModel.getFilePath());
        final JavaClass bcelJavaClass = parser.parse();
        final String packageName = bcelJavaClass.getPackageName();

        final String qualifiedName = bcelJavaClass.getClassName();

        final JavaClassService javaClassService = new JavaClassService(event.getGraphContext());
        final JavaClassModel javaClassModel = javaClassService.create(qualifiedName);
        int majorVersion = bcelJavaClass.getMajor();
        int minorVersion = bcelJavaClass.getMinor();

        String simpleName = qualifiedName;
        if (packageName != null && !packageName.isEmpty() && simpleName != null)
        {
            simpleName = StringUtils.substringAfterLast(simpleName, ".");
        }

        javaClassFileModel.setMajorVersion(majorVersion);
        javaClassFileModel.setMinorVersion(minorVersion);
        javaClassFileModel.setPackageName(packageName);

        javaClassModel.setSimpleName(simpleName);
        javaClassModel.setPackageName(packageName);
        javaClassModel.setQualifiedName(qualifiedName);
        javaClassModel.setClassFile(javaClassFileModel);
        javaClassModel.setPublic(bcelJavaClass.isPublic());
        javaClassModel.setInterface(bcelJavaClass.isInterface());

        final String[] interfaceNames = bcelJavaClass.getInterfaceNames();
        if (interfaceNames != null)
        {
            for (final String interfaceName : interfaceNames)
            {
                JavaClassModel interfaceModel = javaClassService.getOrCreatePhantom(interfaceName);
                javaClassService.addInterface(javaClassModel, interfaceModel);
            }
        }

        String superclassName = bcelJavaClass.getSuperclassName();
        if (!bcelJavaClass.isInterface() && !StringUtils.isBlank(superclassName))
            javaClassModel.setExtends(javaClassService.getOrCreatePhantom(superclassName));

        javaClassFileModel.setJavaClass(javaClassModel);
    }
    catch (Exception ex)
    {
        String nl = ex.getMessage() != null ? Util.NL + "\t" : " ";
        final String message = "BCEL was unable to parse class file '" + javaClassFileModel.getFilePath() + "':" + nl + ex.toString();
        LOG.log(Level.WARNING, message);
        ClassificationService classificationService = new ClassificationService(event.getGraphContext());
        classificationService.attachClassification(event, context, javaClassFileModel, UNPARSEABLE_CLASS_CLASSIFICATION, UNPARSEABLE_CLASS_DESCRIPTION);
        javaClassFileModel.setParseError(message);
        javaClassFileModel.setSkipDecompilation(true);
    }
}