Examples of org.apache.tapestry.services.MethodSignature

org.apache.tapestry.services.MethodSignature
A representation of a method signature, which consists of its name, modifiers (primarily, visibility), return type, parameter types, and declared exception types.
Types are stored as class names (or primitive names) because the MethodSignature is often used in situations where the actual class has not been loaded yet. When classes are already loaded (such as, for use with {@link org.apache.hivemind.service.ClassFab}), then a different implementation with the same name, {@link org.apache.tapestry.ioc.services.MethodSignature} is used.


        List<MethodSignature> result = newList();


        for (CtMethod method : _ctClass.getDeclaredMethods())
        {
            MethodSignature sig = getMethodSignature(method);


            if (filter.accept(sig)) result.add(sig);
        }


        Collections.sort(result);

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        return result;
    }


    private MethodSignature getMethodSignature(CtMethod method)
    {
        MethodSignature result = _methodSignatures.get(method);
        if (result == null)
        {
            try
            {
                String type = method.getReturnType().getName();
                String[] parameters = toTypeNames(method.getParameterTypes());
                String[] exceptions = toTypeNames(method.getExceptionTypes());


                result = new MethodSignature(method.getModifiers(), type, method.getName(),
                        parameters, exceptions);


                _methodSignatures.put(method, result);
            }
            catch (NotFoundException ex)

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    {
        String methodName = newMemberName("write", fieldName);


        String fieldType = getFieldType(fieldName);


        MethodSignature sig = new MethodSignature(Modifier.PRIVATE, "void", methodName,
                new String[]
                { fieldType }, null);


        String message = ServicesMessages.readOnlyField(_ctClass.getName(), fieldName);

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    private void replaceFlagRead(ClassTransformation transformation, String booleanFieldName,
            String typeFieldName, String managerFieldName)
    {
        String readMethodName = transformation.newMemberName("read", booleanFieldName);


        MethodSignature sig = new MethodSignature(Modifier.PRIVATE, "boolean", readMethodName,
                null, null);


        String body = format("return %s.exists(%s);", managerFieldName, typeFieldName);


        transformation.addMethod(sig, body);

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    private void replaceWrite(ClassTransformation transformation, String fieldName,
            String fieldType, String managerFieldName, String typeFieldName)
    {
        String writeMethodName = transformation.newMemberName("write", fieldName);


        MethodSignature writeSignature = new MethodSignature(Modifier.PRIVATE, "void",
                writeMethodName, new String[]
                { fieldType }, null);


        String body = format("%s.set(%s, $1);", managerFieldName, typeFieldName);

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            String fieldType, String managerFieldName, String typeFieldName)
    {


        String readMethodName = transformation.newMemberName("read", fieldName);


        MethodSignature readMethodSignature = new MethodSignature(Modifier.PRIVATE, fieldType,
                readMethodName, null, null);


        String body = format("return (%s) %s.get(%s);", fieldType, managerFieldName, typeFieldName);


        transformation.addMethod(readMethodSignature, body);

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        assertEquals(subclassFieldName, parentFieldName);


        // This proves the the field is protected and can be used in subclasses.


        ct.addMethod(new MethodSignature(Modifier.PUBLIC, "java.lang.String", "getValue", null,
                null), "return " + subclassFieldName + ";");


        ct.finish();


        Class transformed = _classPool.toClass(subclassCtClass, _loader);

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    private void replaceAccessToField(InternalClassTransformation ct, String baseName)
    {
        String fieldName = "_" + baseName;
        String readMethodName = "_read_" + baseName;


        MethodSignature readMethodSignature = new MethodSignature(Modifier.PRIVATE,
                STRING_CLASS_NAME, readMethodName, null, null);


        ct.addMethod(readMethodSignature, String.format(
                "throw new RuntimeException(\"read %s\");",
                baseName));


        ct.replaceReadAccess(fieldName, readMethodName);


        String writeMethodName = "_write_" + baseName;


        MethodSignature writeMethodSignature = new MethodSignature(Modifier.PRIVATE, "void",
                writeMethodName, new String[]
                { STRING_CLASS_NAME }, null);
        ct.addMethod(writeMethodSignature, String.format(
                "throw new RuntimeException(\"write %s\");",
                baseName));

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        replay();


        ClassTransformation ct = createClassTransformation(EventHandlerTarget.class, log);


        OnEvent annotation = ct.getMethodAnnotation(new MethodSignature("handler"), OnEvent.class);


        // Check that the attributes of the annotation match the expectation.


        assertEquals(annotation.value(), new String[]
        { "fred", "barney" });

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        ClassTransformation ct = createClassTransformation(ParentClass.class, log);


        try
        {
            ct.getMethodAnnotation(new MethodSignature("foo"), OnEvent.class);
            unreachable();
        }
        catch (IllegalArgumentException ex)
        {
            assertEquals(

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