Example usage for org.objectweb.asm MethodVisitor visitLineNumber

List of usage examples for org.objectweb.asm MethodVisitor visitLineNumber

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLineNumber.

Prototype

public void visitLineNumber(final int line, final Label start)

Source Link

Document

Visits a line number declaration.

Usage

From source file:org.fabric3.monitor.impl.proxy.BytecodeMonitorProxyService.java

License:Open Source License

private void writeConstructor(ClassWriter cw, String proxyClassDescriptor) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();//  ww w. java2  s.  com
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitLineNumber(56, l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, ABSTRACT_MONITOR_HANDLER, "<init>", "()V");
    mv.visitInsn(RETURN);
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable("this", proxyClassDescriptor, null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:org.forgerock.openidm.shell.felixgogo.FelixGogoCommandsServiceGenerator.java

License:Apache License

/**
 * Generate CommandProvider class and newBuilder for this class based on parameters.
 *
 * @param service  commands service/*from  w  w w  . j a va2  s. co  m*/
 * @param commands commands map (name=help)
 * @param suffix   unique class suffix
 * @return generated CommandProvider newBuilder
 * @throws Exception if something went wrong
 */
public static Object generate(CustomCommandScope service, Map<String, String> commands, String suffix)
        throws Exception {
    // generate class with unique name
    //javassist.CtClass ctClass = POOL.makeClass(AbstractFelixCommandsService.class.getName() + suffix);

    try {
        ClassWriter cw = new ClassWriter(0);
        MethodVisitor mv;
        AnnotationVisitor av0;
        String className = AbstractFelixCommandsService.class.getName().replace('.', '/') + suffix;
        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, null,
                AbstractFelixCommandsService.class.getName().replace('.', '/'), null);

        //cw.visitSource("AbstractFelixCommandsServiceSample.java", null);

        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(Ljava/lang/Object;)V", null, null);
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(10, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKESPECIAL, AbstractFelixCommandsService.class.getName().replace('.', '/'),
                "<init>", "(Ljava/lang/Object;)V");
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLineNumber(11, l1);
        mv.visitInsn(RETURN);
        Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitLocalVariable("this", "L" + className + ";", null, l0, l2, 0);
        mv.visitLocalVariable("service", "Ljava/lang/Object;", null, l0, l2, 1);
        mv.visitMaxs(2, 2);
        mv.visitEnd();

        /*javassist.bytecode.ClassFile ccFile = ctClass.getClassFile();
        ccFile.setVersionToJava5();
        javassist.bytecode.ConstPool constPool = ccFile.getConstPool();
                
        // set superclass
        javassist.CtClass abstractCtClass = POOL.getCtClass(AbstractFelixCommandsService.class.getName());
        ctClass.setSuperclass(abstractCtClass);
                
        // add constructor
        javassist.CtClass serviceCtClass = POOL.getCtClass(Object.class.getName());
        javassist.CtConstructor ctConstructor = new javassist.CtConstructor(new javassist.CtClass[]{serviceCtClass},
            ctClass);
        ctConstructor.setModifiers(javassist.Modifier.PUBLIC);
        ctConstructor.setBody("super($1);");
        ctClass.addConstructor(ctConstructor);
                
        // add method for each command
        javassist.CtClass sessionCtClass = POOL.getCtClass(CommandSession.class.getName());
        javassist.CtClass stringArrayCtClass = POOL.getCtClass(String[].class.getName());*/
        Set<String> names = commands.keySet();
        for (String name : names) {
            if (isMethodAvailable(service, name)) {
                mv = cw.visitMethod(ACC_PUBLIC, name,
                        "(Lorg/apache/felix/service/command/CommandSession;[Ljava/lang/String;)V", null, null);

                av0 = mv.visitAnnotation("Lorg/apache/felix/service/command/Descriptor;", true);
                av0.visit("value", commands.get(name));
                av0.visitEnd();

                mv.visitCode();
                l0 = new Label();
                mv.visitLabel(l0);
                mv.visitLineNumber(15, l0);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitLdcInsn(name);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitMethodInsn(INVOKEVIRTUAL, className, "runCommand",
                        "(Ljava/lang/String;Lorg/apache/felix/service/command/CommandSession;"
                                + "[Ljava/lang/String;)V");
                l1 = new Label();
                mv.visitLabel(l1);
                mv.visitLineNumber(16, l1);
                mv.visitInsn(RETURN);
                l2 = new Label();
                mv.visitLabel(l2);
                mv.visitLocalVariable("this", "L" + className + ";", null, l0, l2, 0);
                mv.visitLocalVariable("session", "Lorg/apache/felix/service/command/CommandSession;", null, l0,
                        l2, 1);
                mv.visitLocalVariable("args", "[Ljava/lang/String;", null, l0, l2, 2);
                mv.visitMaxs(4, 3);
                mv.visitEnd();

                /*javassist.CtMethod ctMethod = new javassist.CtMethod(javassist.CtClass.voidType, name,
                    new javassist.CtClass[]{
                        sessionCtClass, stringArrayCtClass
                    }, ctClass);
                ctMethod.setModifiers(javassist.Modifier.PUBLIC);
                ctMethod.setBody("runCommand(\"" + name + "\", $1, $2);");
                ctClass.addMethod(ctMethod);
                        
                // add GoGo descriptor for this shell command
                javassist.bytecode.AnnotationsAttribute annotationsAttribute =
                    new javassist.bytecode.AnnotationsAttribute(constPool,
                        javassist.bytecode.AnnotationsAttribute.visibleTag);
                javassist.bytecode.annotation.Annotation annotation =
                    new javassist.bytecode.annotation.Annotation(Descriptor.class.getName(), constPool);
                annotation.addMemberValue("value",
                    new javassist.bytecode.annotation.StringMemberValue(commands.get(name), constPool));
                annotationsAttribute.addAnnotation(annotation);
                ctMethod.getMethodInfo().addAttribute(annotationsAttribute);*/
            }
        }

        cw.visitEnd();
        // create new newBuilder
        /*Class<?> aClass = ctClass.toClass(FelixGogoCommandsServiceGenerator.class.getClassLoader(), null);
        */
        Class<?> aClass = classLoader.defineClass(className, cw.toByteArray());
        Constructor<?> constructor = aClass.getConstructor(Object.class);
        return constructor.newInstance(service);
    } catch (Exception e) {
        //ctClass.detach();
        throw e;
    }
}

From source file:org.glassfish.pfl.tf.tools.enhancer.StaticInitVisitor.java

License:Open Source License

private void generateTraceMsg(MethodVisitor mv, String msg, int num) {
    if (ENABLED && util.getDebug()) {
        final Label start = new Label();
        mv.visitLabel(start);// w  w  w. ja  v  a  2  s .co m
        mv.visitLineNumber(num, start);
        mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
        mv.visitLdcInsn(msg);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
    }
}

From source file:org.jboss.errai.BoringClassGenerator.java

License:Apache License

/**
 * Generates a class with a no-args public constructor.
 *
 * @param loader//from  www  . ja va 2  s . c o m
 *          ignored.
 * @param className
 *          The generated class has this package and name.
 * @param classBeingRedefined
 *          ignored.
 * @param protectionDomain
 *          ignored.
 * @param classfileBuffer
 *          ignored.
 * @return bytecode for an empty class whose package and class name are
 *         determined by the {@code className} parameter.
 */
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
        ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {

    if (!hiddenClassNamePattern.matcher(className).matches()) {
        if (debug) {
            System.out.println("client-local-class-hider: not hiding " + className);
        }
        return null;
    }

    if (debug) {
        System.out.println("client-local-class-hider: hiding " + className);
    }

    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, null, "java/lang/Object", null);

    cw.visitSource("FakeClass__GENERATED_BY_JBoss_ClientLocalClassHider.java", null);

    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(15, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(RETURN);
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }

    cw.visitEnd();

    return cw.toByteArray();
}

From source file:org.jboss.errai.EmtpyClassGenerator.java

License:Apache License

/**
 * Generate an empty class: a trivial public subclass of java.lang.Object
 * which is in the expected package and has the expected name.
 * // ww  w .  j a v  a 2  s .c o m
 * @param className
 *          the fully qualified class name
 * @return byte array representing the empty class
 */
public static byte[] generateEmptyClass(String className) {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, null, "java/lang/Object", null);

    cw.visitSource("FakeClass__GENERATED_BY_JBoss_ClientLocalClassHider.java", null);

    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(15, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(RETURN);
        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }

    cw.visitEnd();

    return cw.toByteArray();
}

From source file:org.jruby.runtime.callback.InvocationCallbackFactory.java

License:LGPL

@Deprecated
private ClassWriter createCtor(String namePath) throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    cw.visit(V1_4, ACC_PUBLIC + ACC_SUPER, namePath, null, SUPER_CLASS, null);
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();//from  w w  w.j a va 2 s  .  c o  m
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, SUPER_CLASS, "<init>", "()V");
    Label line = new Label();
    mv.visitLineNumber(0, line);
    mv.visitInsn(RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
    return cw;
}

From source file:org.jruby.runtime.callback.InvocationCallbackFactory.java

License:LGPL

@Deprecated
private ClassWriter createCtorFast(String namePath) throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    cw.visit(V1_4, ACC_PUBLIC + ACC_SUPER, namePath, null, FAST_SUPER_CLASS, null);
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();//from   w  w w .  j a v a2s  .c  o m
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, FAST_SUPER_CLASS, "<init>", "()V");
    Label line = new Label();
    mv.visitLineNumber(0, line);
    mv.visitInsn(RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
    return cw;
}

From source file:org.jruby.runtime.callback.InvocationCallbackFactory.java

License:LGPL

@Deprecated
private MethodVisitor startCall(ClassWriter cw) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "call", CALL_SIG, null, null);

    mv.visitCode();// w w  w . jav  a  2 s  . c  o m
    Label line = new Label();
    mv.visitLineNumber(0, line);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, typePath);
    return mv;
}

From source file:org.jruby.runtime.callback.InvocationCallbackFactory.java

License:LGPL

@Deprecated
private MethodVisitor startCallS(ClassWriter cw) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "call", CALL_SIG, null, null);

    mv.visitCode();/*  w  w  w  . j  a  v  a  2  s .c o  m*/
    Label line = new Label();
    mv.visitLineNumber(0, line);
    mv.visitVarInsn(ALOAD, 1);
    checkCast(mv, IRubyObject.class);
    return mv;
}

From source file:org.jruby.runtime.callback.InvocationCallbackFactory.java

License:LGPL

@Deprecated
private MethodVisitor startCallFast(ClassWriter cw) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "call", FAST_CALL_SIG, null, null);

    mv.visitCode();//from  w w  w.  j  ava 2  s .  c om
    Label line = new Label();
    mv.visitLineNumber(0, line);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, typePath);
    return mv;
}