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

     * TAPESTRY-2448
     */
    @Test
    public void get_annotation_will_read_inherited_field()
    {
        PropertyAdapter pa = access.getAdapter(BeanSubclass.class).getPropertyAdapter("value");


        DataType dt = pa.getAnnotation(DataType.class);


        assertNotNull(dt);
        assertEquals(dt.value(), "fred");


    }

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    }


    @Test
    public void field_annotation_overridden_by_getter_annotation()
    {
        PropertyAdapter pa = access.getAdapter(Bean.class).getPropertyAdapter("value");


        assertEquals(pa.getAnnotation(Validate.class).value(), "getter-value-overrides");
    }

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    @Test
    public void using_generics()
    {
        ClassPropertyAdapter cpa1 = access.getAdapter(StringLongPair.class);


        PropertyAdapter pa1 = cpa1.getPropertyAdapter("key");
        assertSame(pa1.getType(), String.class);
        assertTrue(pa1.isCastRequired());


        assertSame(pa1.getDeclaringClass(), Pair.class);


        PropertyAdapter pa2 = cpa1.getPropertyAdapter("value");
        assertSame(pa2.getType(), Long.class);
        assertTrue(pa2.isCastRequired());


        // On the base class, which defines the generic parameter type variables,
        // the properties just look like Object.


        ClassPropertyAdapter cpa2 = access.getAdapter(Pair.class);


        pa1 = cpa2.getPropertyAdapter("key");
        assertSame(pa1.getType(), Object.class);
        assertFalse(pa1.isCastRequired());


        pa2 = cpa2.getPropertyAdapter("value");
        assertSame(pa2.getType(), Object.class);
        assertFalse(pa2.isCastRequired());


    }

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    }


    @Test
    public void get_scala_properties_with_bean_accessors()
    {
        PropertyAdapter pa = access.getAdapter(ScalaBean.class).getPropertyAdapter("value");


        // even thought scala accessors are present the java bean ones should be the ones used by Tapestry
        assertEquals(pa.getReadMethod().getName(), "getValue");
        assertEquals(pa.getWriteMethod().getName(), "setValue");
    }

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    }


    @Test
    public void get_scala_properties()
    {
        PropertyAdapter pa = access.getAdapter(ScalaClass.class).getPropertyAdapter("value");


        assertEquals(pa.getReadMethod().getName(), "value");
        assertEquals(pa.getWriteMethod().getName(), "value_$eq");
    }

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    }


    @Test
    public void access_to_public_field()
    {
        PropertyAdapter pa = access.getAdapter(PublicFieldBean.class).getPropertyAdapter("value");


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


        PublicFieldBean bean = new PublicFieldBean();


        pa.set(bean, "fred");


        assertEquals(bean.value, "fred");


        bean.value = "barney";


        assertEquals(pa.get(bean), "barney");
    }

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    }


    @Test
    public void property_is_favored_over_public_field()
    {
        PropertyAdapter pa = access.getAdapter(ShadowedPublicFieldBean.class).getPropertyAdapter("value");


        assertFalse(pa.isField());


        ShadowedPublicFieldBean bean = new ShadowedPublicFieldBean();


        pa.set(bean, "fred");


        assertNull(bean.value);


        bean.value = "barney";
        bean.setValue("wilma");


        assertEquals(pa.get(bean), "wilma");
    }

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    }


    @Test
    public void generic_field_is_recognized()
    {
        PropertyAdapter pa = access.getAdapter(GenericStringBean.class).getPropertyAdapter("value");


        assertTrue(pa.isCastRequired());
        assertEquals(pa.getType(), String.class);
        assertSame(pa.getDeclaringClass(), GenericBean.class);
    }

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            Method readMethod = pd.getReadMethod();


            Class propertyType = readMethod == null ? pd.getPropertyType() : GenericsUtils.extractGenericReturnType(
                    beanType, readMethod);


            PropertyAdapter pa = new PropertyAdapterImpl(this, pd.getName(), propertyType, readMethod, pd
                    .getWriteMethod());


            adapters.put(pa.getName(), pa);
        }


        // Now, add any public fields (even if static) that do not conflict


        for (Field f : beanType.getFields())
        {
            String name = f.getName();


            if (!adapters.containsKey(name))
            {
                Class propertyType = GenericsUtils.extractGenericFieldType(beanType, f);
                PropertyAdapter pa = new PropertyAdapterImpl(this, name, propertyType, f);


                adapters.put(name, pa);
            }
        }
    }

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        adaptorFor(propertyName).set(instance, value);
    }


    private PropertyAdapter adaptorFor(String name)
    {
        PropertyAdapter pa = adapters.get(name);


        if (pa == null)
            throw new IllegalArgumentException(ServiceMessages.noSuchProperty(beanType, name));


        return pa;

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