Java Code Examples for jdk.internal.org.objectweb.asm.Type#getInternalName()

public static byte[] bytes(String name, Class<?> superClass) {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);

    String superName = Type.getInternalName(superClass);
    cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, name, null, superName, null);

    handlerField(cw);

    for (Method method : sequence(superClass.getMethods()).
            reject(m -> isFinal(m.getModifiers())).
            reject(m -> isStatic(m.getModifiers())).
            reject(m -> m.getName().equals("toString"))) {
        method(cw, name, method, superName);
    }

    cw.visitEnd();
    return cw.toByteArray();
}
 

private static String getGeneratedClassName(final Class<?> superType, final List<Class<?>> interfaces) {
    // The class we use to primarily name our adapter is either the superclass, or if it is Object (meaning we're
    // just implementing interfaces or extending Object), then the first implemented interface or Object.
    final Class<?> namingType = superType == Object.class ? (interfaces.isEmpty()? Object.class : interfaces.get(0)) : superType;
    final Package pkg = namingType.getPackage();
    final String namingTypeName = Type.getInternalName(namingType);
    final StringBuilder buf = new StringBuilder();
    if (namingTypeName.startsWith(JAVA_PACKAGE_PREFIX) || pkg == null || pkg.isSealed()) {
        // Can't define new classes in java.* packages
        buf.append(ADAPTER_PACKAGE_PREFIX).append(namingTypeName);
    } else {
        buf.append(namingTypeName).append(ADAPTER_CLASS_NAME_SUFFIX);
    }
    final Iterator<Class<?>> it = interfaces.iterator();
    if(superType == Object.class && it.hasNext()) {
        it.next(); // Skip first interface, it was used to primarily name the adapter
    }
    // Append interface names to the adapter name
    while(it.hasNext()) {
        buf.append("$$").append(it.next().getSimpleName());
    }
    return buf.toString().substring(0, Math.min(MAX_GENERATED_TYPE_NAME_LENGTH, buf.length()));
}
 

private static String getGeneratedClassName(final Class<?> superType, final List<Class<?>> interfaces) {
    // The class we use to primarily name our adapter is either the superclass, or if it is Object (meaning we're
    // just implementing interfaces or extending Object), then the first implemented interface or Object.
    final Class<?> namingType = superType == Object.class ? (interfaces.isEmpty()? Object.class : interfaces.get(0)) : superType;
    final Package pkg = namingType.getPackage();
    final String namingTypeName = Type.getInternalName(namingType);
    final StringBuilder buf = new StringBuilder();
    buf.append(ADAPTER_PACKAGE_INTERNAL).append(namingTypeName.replace('/', '_'));
    final Iterator<Class<?>> it = interfaces.iterator();
    if(superType == Object.class && it.hasNext()) {
        it.next(); // Skip first interface, it was used to primarily name the adapter
    }
    // Append interface names to the adapter name
    while(it.hasNext()) {
        buf.append("$$").append(it.next().getSimpleName());
    }
    return buf.toString().substring(0, Math.min(MAX_GENERATED_TYPE_NAME_LENGTH, buf.length()));
}
 

private static void loadArguments(MethodVisitor mv, Method method) {
    int arguments = method.getParameterCount();
    mv.visitLdcInsn(arguments);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");

    Class<?>[] parameterTypes = method.getParameterTypes();
    for (int i = 0, local = 0; i < parameterTypes.length; i++) {
        Class<?> parameterType = parameterTypes[i];
        local++;
        mv.visitInsn(DUP);
        mv.visitLdcInsn(i);
        mv.visitVarInsn(Asm.load(parameterType), local);
        if (parameterType.isPrimitive() && !parameterType.equals(void.class)) {
            String internalName = Type.getInternalName(Reflection.box(parameterType));
            mv.visitMethodInsn(INVOKESTATIC, internalName, "valueOf", format("(%s)L%s;", Type.getDescriptor(parameterType), internalName), false);
        }
        if (parameterType.equals(double.class) || parameterType.equals(long.class)) local++;
        mv.visitInsn(AASTORE);
    }
}
 

private static String getGeneratedClassName(final Class<?> superType, final List<Class<?>> interfaces) {
    // The class we use to primarily name our adapter is either the superclass, or if it is Object (meaning we're
    // just implementing interfaces or extending Object), then the first implemented interface or Object.
    final Class<?> namingType = superType == Object.class ? (interfaces.isEmpty()? Object.class : interfaces.get(0)) : superType;
    final Package pkg = namingType.getPackage();
    final String namingTypeName = Type.getInternalName(namingType);
    final StringBuilder buf = new StringBuilder();
    if (namingTypeName.startsWith(JAVA_PACKAGE_PREFIX) || pkg == null || pkg.isSealed()) {
        // Can't define new classes in java.* packages
        buf.append(ADAPTER_PACKAGE_PREFIX).append(namingTypeName);
    } else {
        buf.append(namingTypeName).append(ADAPTER_CLASS_NAME_SUFFIX);
    }
    final Iterator<Class<?>> it = interfaces.iterator();
    if(superType == Object.class && it.hasNext()) {
        it.next(); // Skip first interface, it was used to primarily name the adapter
    }
    // Append interface names to the adapter name
    while(it.hasNext()) {
        buf.append("$$").append(it.next().getSimpleName());
    }
    return buf.toString().substring(0, Math.min(MAX_GENERATED_TYPE_NAME_LENGTH, buf.length()));
}
 

private static String[] getExceptionNames(final Class<?>[] exceptions) {
    final String[] exceptionNames = new String[exceptions.length];
    for (int i = 0; i < exceptions.length; ++i) {
        exceptionNames[i] = Type.getInternalName(exceptions[i]);
    }
    return exceptionNames;
}
 

/**
 * Given a list of class objects, return an array with their binary names. Used to generate the array of interface
 * names to implement.
 * @param classes the classes
 * @return an array of names
 */
private static String[] getInternalTypeNames(final List<Class<?>> classes) {
    final int interfaceCount = classes.size();
    final String[] interfaceNames = new String[interfaceCount];
    for(int i = 0; i < interfaceCount; ++i) {
        interfaceNames[i] = Type.getInternalName(classes.get(i));
    }
    return interfaceNames;
}
 

/**
 * Creates a new local variable of the given type.
 *
 * @param type
 *            the type of the local variable to be created.
 * @return the identifier of the newly created local variable.
 */
public int newLocal(final Type type) {
    Object t;
    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
        t = Opcodes.INTEGER;
        break;
    case Type.FLOAT:
        t = Opcodes.FLOAT;
        break;
    case Type.LONG:
        t = Opcodes.LONG;
        break;
    case Type.DOUBLE:
        t = Opcodes.DOUBLE;
        break;
    case Type.ARRAY:
        t = type.getDescriptor();
        break;
    // case Type.OBJECT:
    default:
        t = type.getInternalName();
        break;
    }
    int local = newLocalMapping(type);
    setLocalType(local, type);
    setFrameLocal(local, t);
    changed = true;
    return local;
}
 

private static String[] getExceptionNames(final Class<?>[] exceptions) {
    final String[] exceptionNames = new String[exceptions.length];
    for (int i = 0; i < exceptions.length; ++i) {
        exceptionNames[i] = Type.getInternalName(exceptions[i]);
    }
    return exceptionNames;
}
 

private static String[] getExceptionNames(final Class<?>[] exceptions) {
    final String[] exceptionNames = new String[exceptions.length];
    for (int i = 0; i < exceptions.length; ++i) {
        exceptionNames[i] = Type.getInternalName(exceptions[i]);
    }
    return exceptionNames;
}
 

/**
 * Given a list of class objects, return an array with their binary names. Used to generate the array of interface
 * names to implement.
 * @param classes the classes
 * @return an array of names
 */
private static String[] getInternalTypeNames(final List<Class<?>> classes) {
    final int interfaceCount = classes.size();
    final String[] interfaceNames = new String[interfaceCount];
    for(int i = 0; i < interfaceCount; ++i) {
        interfaceNames[i] = Type.getInternalName(classes.get(i));
    }
    return interfaceNames;
}
 

private static String[] getExceptionNames(final Class<?>[] exceptions) {
    final String[] exceptionNames = new String[exceptions.length];
    for (int i = 0; i < exceptions.length; ++i) {
        exceptionNames[i] = Type.getInternalName(exceptions[i]);
    }
    return exceptionNames;
}
 

/**
 * Creates a new local variable of the given type.
 *
 * @param type
 *            the type of the local variable to be created.
 * @return the identifier of the newly created local variable.
 */
public int newLocal(final Type type) {
    Object t;
    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
        t = Opcodes.INTEGER;
        break;
    case Type.FLOAT:
        t = Opcodes.FLOAT;
        break;
    case Type.LONG:
        t = Opcodes.LONG;
        break;
    case Type.DOUBLE:
        t = Opcodes.DOUBLE;
        break;
    case Type.ARRAY:
        t = type.getDescriptor();
        break;
    // case Type.OBJECT:
    default:
        t = type.getInternalName();
        break;
    }
    int local = newLocalMapping(type);
    setLocalType(local, type);
    setFrameLocal(local, t);
    changed = true;
    return local;
}
 

/**
 * Creates a new local variable of the given type.
 *
 * @param type
 *            the type of the local variable to be created.
 * @return the identifier of the newly created local variable.
 */
public int newLocal(final Type type) {
    Object t;
    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
        t = Opcodes.INTEGER;
        break;
    case Type.FLOAT:
        t = Opcodes.FLOAT;
        break;
    case Type.LONG:
        t = Opcodes.LONG;
        break;
    case Type.DOUBLE:
        t = Opcodes.DOUBLE;
        break;
    case Type.ARRAY:
        t = type.getDescriptor();
        break;
    // case Type.OBJECT:
    default:
        t = type.getInternalName();
        break;
    }
    int local = newLocalMapping(type);
    setLocalType(local, type);
    setFrameLocal(local, t);
    changed = true;
    return local;
}
 

private static String[] getExceptionNames(final Class<?>[] exceptions) {
    final String[] exceptionNames = new String[exceptions.length];
    for (int i = 0; i < exceptions.length; ++i) {
        exceptionNames[i] = Type.getInternalName(exceptions[i]);
    }
    return exceptionNames;
}
 

/**
 * Generates an invoke method instruction.
 *
 * @param opcode
 *            the instruction's opcode.
 * @param type
 *            the class in which the method is defined.
 * @param method
 *            the method to be invoked.
 */
private void invokeInsn(final int opcode, final Type type,
        final Method method, final boolean itf) {
    String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
            : type.getInternalName();
    mv.visitMethodInsn(opcode, owner, method.getName(),
            method.getDescriptor(), itf);
}
 

/**
 * Generates an invoke method instruction.
 *
 * @param opcode
 *            the instruction's opcode.
 * @param type
 *            the class in which the method is defined.
 * @param method
 *            the method to be invoked.
 */
private void invokeInsn(final int opcode, final Type type,
        final Method method, final boolean itf) {
    String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
            : type.getInternalName();
    mv.visitMethodInsn(opcode, owner, method.getName(),
            method.getDescriptor(), itf);
}
 

/**
 * Generates an invoke method instruction.
 *
 * @param opcode
 *            the instruction's opcode.
 * @param type
 *            the class in which the method is defined.
 * @param method
 *            the method to be invoked.
 */
private void invokeInsn(final int opcode, final Type type,
        final Method method, final boolean itf) {
    String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
            : type.getInternalName();
    mv.visitMethodInsn(opcode, owner, method.getName(),
            method.getDescriptor(), itf);
}
 

/**
 * Generates an invoke method instruction.
 *
 * @param opcode
 *            the instruction's opcode.
 * @param type
 *            the class in which the method is defined.
 * @param method
 *            the method to be invoked.
 */
private void invokeInsn(final int opcode, final Type type,
        final Method method, final boolean itf) {
    String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
            : type.getInternalName();
    mv.visitMethodInsn(opcode, owner, method.getName(),
            method.getDescriptor(), itf);
}
 

/**
 * Generates an invoke method instruction.
 *
 * @param opcode
 *            the instruction's opcode.
 * @param type
 *            the class in which the method is defined.
 * @param method
 *            the method to be invoked.
 */
private void invokeInsn(final int opcode, final Type type,
        final Method method, final boolean itf) {
    String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
            : type.getInternalName();
    mv.visitMethodInsn(opcode, owner, method.getName(),
            method.getDescriptor(), itf);
}