Examples of org.apache.tapestry5.ioc.services.PropertyAdapter

Package org.apache.tapestry5.ioc.services

Examples of org.apache.tapestry5.ioc.services.PropertyAdapter

org.apache.tapestry5.ioc.services.PropertyAdapter
Provides access to a single property within a class. Acts as an {@link org.apache.tapestry5.ioc.AnnotationProvider}; when searching for annotations, the read method (if present) is checked first, followed by the write method, followed by the underlying field (when the property name matches the field name).
Starting in release 5.2, this property may actually be a public field. @see org.apache.tapestry5.ioc.services.ClassPropertyAdapter

    }


    public <T> T build(final Object source, final String propertyName, final Class<T> propertyType)
    {
        final Class sourceClass = source.getClass();
        final PropertyAdapter adapter = propertyAccess.getAdapter(sourceClass).getPropertyAdapter(propertyName);


        // TODO: Perhaps extend ClassPropertyAdapter to do these checks?


        if (adapter == null)
            throw new RuntimeException(ServiceMessages.noSuchProperty(sourceClass, propertyName));


        if (!adapter.isRead())
            throw new RuntimeException(ServiceMessages.readNotSupported(source, propertyName));


        if (!propertyType.isAssignableFrom(adapter.getType()))
            throw new RuntimeException(ServiceMessages.propertyTypeMismatch(propertyName, sourceClass,
                    adapter.getType(), propertyType));


        ClassInstantiator instantiator = proxyFactory.createProxy(propertyType, new PlasticClassTransformer()
        {
            public void transform(PlasticClass plasticClass)
            {
                final PlasticField sourceField = plasticClass.introduceField(sourceClass, "source").inject(source);


                PlasticMethod delegateMethod = plasticClass.introducePrivateMethod(propertyType.getName(),
                        "readProperty", null, null);


                // You don't do this using MethodAdvice, because then we'd have to use reflection to access the read
                // method.


                delegateMethod.changeImplementation(new InstructionBuilderCallback()
                {
                    public void doBuild(InstructionBuilder builder)
                    {
                        builder.loadThis().getField(sourceField);
                        builder.invoke(sourceClass, propertyType, adapter.getReadMethod().getName());


                        // Now add the null check.


                        builder.dupe().when(Condition.NULL, new InstructionBuilderCallback()
                        {

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    {
        List<PropertyOrder> properties = CollectionFactory.newList();


        for (String name : propertyNames)
        {
            PropertyAdapter pa = classAdapter.getPropertyAdapter(name);


            Method readMethod = pa.getReadMethod();


            Location location = readMethod == null ? null : classFactory.getMethodLocation(readMethod);


            int line = location == null ? -1 : location.getLine();

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        BeanModel<T> model = new BeanModelImpl<T>(beanClass, propertyConduitSource, typeCoercer, messages, locator);


        for (final String propertyName : adapter.getPropertyNames())
        {
            PropertyAdapter pa = adapter.getPropertyAdapter(propertyName);


            if (!pa.isRead())
            {
                continue;
            }


            if (isStaticFieldProperty(pa))
            {
                continue;
            }


            if (pa.getAnnotation(NonVisual.class) != null)
            {
                continue;
            }


            if (filterReadOnlyProperties && !pa.isUpdate())
            {
                continue;
            }


            final String dataType = dataTypeAnalyzer.identifyDataType(pa);

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    @Test
    public void property_adapter_read_only_property()
    {
        ClassPropertyAdapter cpa = access.getAdapter(Bean.class);
        PropertyAdapter pa = cpa.getPropertyAdapter("readOnly");


        assertTrue(pa.isRead());
        assertFalse(pa.isUpdate());
        assertFalse(pa.isCastRequired());


        assertNull(pa.getWriteMethod());
        assertEquals(pa.getReadMethod(), findMethod(Bean.class, "getReadOnly"));
    }

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    @Test
    public void property_adapter_write_only_property()
    {
        ClassPropertyAdapter cpa = access.getAdapter(Bean.class);
        PropertyAdapter pa = cpa.getPropertyAdapter("writeOnly");


        assertFalse(pa.isRead());
        assertTrue(pa.isUpdate());


        assertEquals(pa.getWriteMethod(), findMethod(Bean.class, "setWriteOnly"));
        assertNull(pa.getReadMethod());
    }

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    }


    @Test
    public void read_static_field()
    {
        PropertyAdapter adapter = access.getAdapter(Bean.class).getPropertyAdapter("pi");


        assertSame(adapter.get(null), Bean.PI);
    }

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    }


    @Test
    public void static_final_fields_may_not_be_changed()
    {
        PropertyAdapter adapter = access.getAdapter(Bean.class).getPropertyAdapter("pi");


        try
        {
            adapter.set(null, 3.0d);
            unreachable();
        } catch (RuntimeException ex)
        {
            // The exact text varies from JDK to JDK
            assertMessageContains(ex, "final", "PI");

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    }


    @Test
    public void get_annotation_when_annotation_not_present()
    {
        PropertyAdapter pa = access.getAdapter(AnnotatedBean.class).getPropertyAdapter("readWrite");


        assertNull(pa.getAnnotation(Scope.class));
    }

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    }


    @Test
    public void get_annotation_with_annotation_on_write_method()
    {
        PropertyAdapter pa = access.getAdapter(AnnotatedBean.class).getPropertyAdapter("annotationOnWrite");


        Scope annotation = pa.getAnnotation(Scope.class);
        assertNotNull(annotation);


        assertEquals(annotation.value(), "onwrite");
    }

View Full Code Here

    }


    @Test
    public void read_method_annotation_overrides_write_method_annotation()
    {
        PropertyAdapter pa = access.getAdapter(AnnotatedBean.class).getPropertyAdapter("annotationOnRead");


        Scope annotation = pa.getAnnotation(Scope.class);
        assertNotNull(annotation);


        assertEquals(annotation.value(), "onread");
    }

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