Examples of org.apache.tapestry5.Binding

org.apache.tapestry5.Binding
A binding is a connection between a component and its container (another component), that allows the embedded component to gain access to resources defined by the container. Resources can represent any kind of value that can be obtained from the parent component, but is often a JavaBean property that can be read and updated. Different implementations of Binding are used to access different kinds of resources of the container.
A binding ultimately must provide access to the underlying annotations. In most cases, there are no annotations, but bindings that ultimate invoke methods or read and update fields must provide access to those annotations.

                    InternalComponentResources containerResources = pageAssembly.activeElement.peek().getComponentResources();


                    ComponentPageElement embeddedElement = pageAssembly.createdElement.peek();
                    InternalComponentResources embeddedResources = embeddedElement.getComponentResources();


                    Binding binding = elementFactory.newBinding(parameterName,
                                                                containerResources,
                                                                embeddedResources,
                                                                defaultBindingPrefix,
                                                                parameterValue,
                                                                location);

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                                           String containerParameterName)
    {
        // TODO: This assumes that the two parameters are both on the core component and not on
        // a mixin. I think this could be improved with more static analysis.


        Binding containerBinding = container.getBinding(containerParameterName);


        if (containerBinding == null) return;


        // This helps with debugging, and re-orients any thrown exceptions
        // to the location of the inherited binding, rather than the container component's

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    @Test
    public void expression_has_no_prefix()
    {
        BindingFactory factory = mockBindingFactory();
        Binding binding = mockBinding();
        ComponentResources container = mockComponentResources();
        ComponentResources component = mockComponentResources();
        Location l = mockLocation();


        String defaultPrefix = "def";
        String description = "descrip";
        String expression = "full expression";


        train_newBinding(factory, description, container, component, expression, l, binding);


        replay();


        Map<String, BindingFactory> map = newMap();


        map.put(defaultPrefix, factory);


        BindingSource source = new BindingSourceImpl(map, interner);


        Binding actual = source.newBinding(
                description,
                container,
                component,
                defaultPrefix,
                expression,

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    @Test
    public void expression_prefix_not_in_configuration()
    {
        BindingFactory factory = mockBindingFactory();
        Binding binding = mockBinding();
        ComponentResources container = mockComponentResources();
        ComponentResources component = mockComponentResources();
        Location l = mockLocation();


        String defaultPrefix = "def";
        String description = "descrip";
        String expression = "javascript:not-a-known-prefix";


        train_newBinding(factory, description, container, component, expression, l, binding);


        replay();


        Map<String, BindingFactory> map = newMap();


        map.put(defaultPrefix, factory);


        BindingSource source = new BindingSourceImpl(map, interner);


        Binding actual = source.newBinding(
                description,
                container,
                component,
                defaultPrefix,
                expression,

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    @Test
    public void known_prefix()
    {
        BindingFactory factory = mockBindingFactory();
        Binding binding = mockBinding();
        ComponentResources container = mockComponentResources();
        ComponentResources component = mockComponentResources();
        Location l = mockLocation();


        String defaultPrefix = "literal";
        String description = "descrip";


        // The "prop:" prefix is stripped off ...
        train_newBinding(factory, description, container, component, "myproperty", l, binding);


        replay();


        Map<String, BindingFactory> map = newMap();


        map.put("prop", factory);


        BindingSource source = new BindingSourceImpl(map, interner);


        Binding actual = source.newBinding(
                description,
                container,
                component,
                defaultPrefix,
                "prop:myproperty",

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        {
            public void advise(MethodInvocation invocation)
            {
                ComponentResources resources = invocation.getInstanceContext().get(ComponentResources.class);


                Binding binding = bindingSource.newBinding("@Cached watch", resources,
                        BindingConstants.PROP, watch);


                bindingFieldHandle.set(invocation.getInstance(), binding);


                invocation.proceed();
            }
        });


        return new MethodResultCacheFactory()
        {
            public MethodResultCache create(Object instance)
            {
                Binding binding = (Binding) bindingFieldHandle.get(instance);


                return new WatchedBindingMethodResultCache(binding);
            }
        };
    }

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        {
            public String map(DynamicDelegate delegate)
            {
                try
                {
                    Binding binding = bindingSource.newBinding("dynamic template binding", delegate
                            .getComponentResources().getContainerResources(), delegate.getComponentResources(),
                            BindingConstants.PROP, expression, location);


                    Object boundValue = binding.get();


                    return boundValue == null ? null : boundValue.toString();
                } catch (Throwable t)
                {
                    throw new TapestryException(InternalUtils.toMessage(t), location, t);

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                            }


                            // Otherwise, construct a default binding, or use one provided from
                            // the component.


                            Binding binding = getDefaultBindingForParameter();


                            if (logger.isDebugEnabled())
                            {
                                logger.debug(String.format("%s parameter %s bound to default %s", icr.getCompleteId(),
                                        parameterName, binding));

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        ComponentResources resources = newComponentResources(bean);
        Location l = mockLocation();


        replay();


        Binding binding = factory.newBinding("test binding", resources, null, "objectValue", l);


        assertSame(binding.getBindingType(), String.class);


        bean.setObjectValue("first");


        assertEquals(binding.get(), "first");


        binding.set("second");


        assertEquals(bean.getObjectValue(), "second");
        assertEquals(InternalUtils.locationOf(binding), l);


        assertEquals(binding.toString(), "PropBinding[test binding foo.Bar:baz(objectValue)]");


        verify();
    }

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        ComponentResources resources = newComponentResources(bean);
        Location l = mockLocation();


        replay();


        Binding binding = factory.newBinding("test binding", resources, null, "readOnly", l);


        assertEquals(binding.getAnnotation(Validate.class).value(), "readonly");


        verify();
    }

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