Example usage for org.objectweb.asm Opcodes ACC

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes ACC_PUBLIC.

Prototype

int ACC_PUBLIC

To view the source code for org.objectweb.asm Opcodes ACC_PUBLIC.

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Usage

From source file:net.sf.cglib.proxy.TestEnhancer.java

License:Apache License

public void testBridgeParameterCheckcast() throws Exception {

    // If the compiler used for Z omits the bridge method, and X is compiled with javac,
    // javac will generate an invokespecial bridge in X.

    // public interface I<A, B> {
    //   public A f(B b);
    // }//w w  w.j  a  va2s  .c o  m
    // public abstract class Z<U extends Number> implements I<U, Long> {
    //   public U f(Long id) {
    //     return null;
    //   }
    // }
    // public class X extends Z<Integer> {}

    final Map<String, byte[]> classes = new HashMap<String, byte[]>();

    {
        ClassWriter cw = new ClassWriter(0);
        cw.visit(49, Opcodes.ACC_PUBLIC | Opcodes.ACC_ABSTRACT | Opcodes.ACC_INTERFACE, "I",
                "<A:Ljava/lang/Object;B:Ljava/lang/Object;>Ljava/lang/Object;", "java/lang/Object", null);
        {
            MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_ABSTRACT, "f",
                    "(Ljava/lang/Object;)Ljava/lang/Object;", "(TB;)TA;", null);
            mv.visitEnd();
        }
        cw.visitEnd();
        classes.put("I.class", cw.toByteArray());
    }
    {
        ClassWriter cw = new ClassWriter(0);
        cw.visit(49, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER | Opcodes.ACC_ABSTRACT, "Z",
                "<U:Ljava/lang/Number;>Ljava/lang/Object;LI<TU;Ljava/lang/String;>;", "java/lang/Object",
                new String[] { "I" });
        {
            MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
        }
        {
            MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "f", "(Ljava/lang/String;)Ljava/lang/Number;",
                    "(Ljava/lang/String;)TU;", null);
            mv.visitCode();
            mv.visitInsn(Opcodes.ACONST_NULL);
            mv.visitInsn(Opcodes.ARETURN);
            mv.visitMaxs(1, 2);
            mv.visitEnd();
        }
        cw.visitEnd();
        classes.put("Z.class", cw.toByteArray());
    }
    {
        ClassWriter cw = new ClassWriter(0);
        cw.visit(49, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER, "X", "LZ<Ljava/lang/Integer;>;", "Z", null);
        {
            MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "Z", "<init>", "()V", false);
            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
        }
        {
            MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_BRIDGE | Opcodes.ACC_SYNTHETIC,
                    "f", "(Ljava/lang/Object;)Ljava/lang/Object;", null, null);
            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitVarInsn(Opcodes.ALOAD, 1);
            mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/String");
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "Z", "f", "(Ljava/lang/String;)Ljava/lang/Number;",
                    false);
            mv.visitInsn(Opcodes.ARETURN);
            mv.visitMaxs(2, 2);
            mv.visitEnd();
        }

        cw.visitEnd();

        classes.put("X.class", cw.toByteArray());
    }

    ClassLoader classLoader = new ClassLoader(getClass().getClassLoader()) {
        @Override
        public InputStream getResourceAsStream(String name) {
            InputStream is = super.getResourceAsStream(name);
            if (is != null) {
                return is;
            }
            if (classes.containsKey(name)) {
                return new ByteArrayInputStream(classes.get(name));
            }
            return null;
        }

        public Class findClass(String name) throws ClassNotFoundException {
            byte[] ba = classes.get(name.replace('.', '/') + ".class");
            if (ba != null) {
                return defineClass(name, ba, 0, ba.length);
            }
            throw new ClassNotFoundException(name);
        }
    };

    List<Class> retTypes = new ArrayList<Class>();
    List<Class> paramTypes = new ArrayList<Class>();
    Interceptor interceptor = new Interceptor(retTypes, paramTypes);

    Enhancer e = new Enhancer();
    e.setClassLoader(classLoader);
    e.setSuperclass(classLoader.loadClass("X"));
    e.setCallback(interceptor);

    Object c = e.create();

    for (Method m : c.getClass().getDeclaredMethods()) {
        if (m.getName().equals("f") && m.getReturnType().equals(Object.class)) {
            m.invoke(c, new Object[] { null });
        }
    }

    // f(Object)Object should bridge to f(Number)String
    assertEquals(Arrays.asList(Object.class, Number.class), retTypes);
    assertEquals(Arrays.asList(Object.class, String.class), paramTypes);
}

From source file:net.sf.clirr.core.internal.asm.AbstractAsmScoped.java

License:Open Source License

public Scope getDeclaredScope() {
    if (checkFlag(Opcodes.ACC_PRIVATE)) {
        return Scope.PRIVATE;
    } else if (checkFlag(Opcodes.ACC_PROTECTED)) {
        return Scope.PROTECTED;
    } else if (checkFlag(Opcodes.ACC_PUBLIC)) {
        return Scope.PUBLIC;
    }//  w w w . j  av a2s  .  c om
    return Scope.PACKAGE;
}

From source file:net.sf.profiler4j.agent.BytecodeTransformer.java

License:Apache License

private static boolean isGetterSetter(int flag, String name, String methodDescriptor) {
    if ((Opcodes.ACC_PUBLIC | flag) == 0 || ((Opcodes.ACC_STATIC | flag) | (Opcodes.ACC_NATIVE | flag)
            | (Opcodes.ACC_ABSTRACT | flag) | (Opcodes.ACC_SYNCHRONIZED | flag)) != 0) {
        return false;
    }//from   w  ww .ja v  a  2  s . c om
    Type[] pTypes = Type.getArgumentTypes(methodDescriptor);
    Type rType = Type.getReturnType(methodDescriptor);
    if (getterRegex.matcher(name).matches() || getterBoolRegex.matcher(name).matches()) {
        return pTypes.length == 0 && !rType.equals(Type.VOID_TYPE);
    }
    if (setterRegex.matcher(name).matches()) {
        return pTypes.length == 1 && !rType.equals(Type.VOID_TYPE);
    }
    return false;
}

From source file:net.sourceforge.cobertura.instrument.pass3.AbstractCodeProvider.java