Examples of org.apache.tapestry5.runtime.Component

org.apache.tapestry5.runtime.Component
Interface that defines the lifecycle of a component, within a page, allowing for callbacks into the component for many different events. This interface is part of the public API for Tapestry, but is not expected to be directly implemented by component classes; it should only be implemented as part of the component class transformation process.
Most of the methods are related to render phases; see the corresponding annotations and component rendering documentation to see how they relate to each other.
Starting in 5.3 this interface no longer implements {@link PageLifecycleListener}. Normally, this would be an incompatible change, but Component is not supposed to be directly implemented by user code.


    @Test
    public void get_embedded_does_not_exist()
    {
        Page page = newPage(PAGE_NAME);
        Component component = mockComponent();
        ComponentModel model = mockComponentModel();
        TypeCoercer coercer = mockTypeCoercer();
        Logger logger = mockLogger();


        train_getLogger(model, logger);

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    @Test
    public void get_existing_embedded_component()
    {
        Page page = newPage(PAGE_NAME);
        Component component = mockComponent();
        ComponentModel model = mockComponentModel();
        ComponentPageElement childElement = mockComponentPageElement();
        Component childComponent = mockComponent();
        TypeCoercer coercer = mockTypeCoercer();
        Logger logger = mockLogger();


        train_getLogger(model, logger);

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    @Test
    public void component_ids_must_be_unique_within_container()
    {
        Page page = newPage(PAGE_NAME);
        Component pageComponent = mockComponent();
        ComponentModel model = mockComponentModel();
        ComponentPageElement child1 = mockComponentPageElement();
        ComponentPageElement child2 = mockComponentPageElement();
        TypeCoercer coercer = mockTypeCoercer();
        Location l = mockLocation();

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    @Test
    public void get_mixin_by_class_name()
    {
        Page page = newPage(PAGE_NAME);
        Component component = mockComponent();
        ComponentModel model = mockComponentModel();
        TypeCoercer coercer = mockTypeCoercer();
        final String mixinClassName = "foo.Bar";
        Component mixin = mockComponent();
        ComponentModel mixinModel = mockComponentModel();
        Logger logger = mockLogger();


        train_getLogger(model, logger);

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    @Test
    public void get_mixin_by_unknown_class_name()
    {
        Page page = newPage(PAGE_NAME);
        Component component = mockComponent();
        ComponentModel model = mockComponentModel();
        TypeCoercer coercer = mockTypeCoercer();
        Component mixin = mockComponent();
        ComponentModel mixinModel = mockComponentModel();
        Logger logger = mockLogger();


        train_getLogger(model, logger);

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    @Test
    public void set_explicit_parameter_of_unknown_mixin()
    {
        Page page = newPage(PAGE_NAME);
        Component component = mockComponent();
        ComponentModel model = mockComponentModel();
        ComponentModel mixinModel = mockComponentModel();
        Component mixin = mockComponent();
        TypeCoercer coercer = mockTypeCoercer();
        Binding binding = mockBinding();
        Logger logger = mockLogger();


        train_getLogger(model, logger);

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    @Test
    public void invariant_object_retained_after_detach() throws Exception
    {
        InternalComponentResources resources = mockInternalComponentResources();


        Component component = setupForIntegrationTest(resources);


        // On first invocation, the resources are queried.


        String value = "To be in Tapestry in the spring time ...";


        train_isLoaded(resources, true);
        train_isBound(resources, "invariantObject", true);
        train_readParameter(resources, "invariantObject", String.class, value);


        replay();


        assertSame(access.get(component, "invariantObject"), value);


        verify();


        // No further training needed here.


        replay();


        // Still cached ...


        assertSame(access.get(component, "invariantObject"), value);


        component.postRenderCleanup();


        // Still cached ...


        assertSame(access.get(component, "invariantObject"), value);


        component.containingPageDidDetach();


        // Still cached ...


        assertSame(access.get(component, "invariantObject"), value);

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    @Test
    public void invariant_primitive_retained_after_detach() throws Exception
    {
        InternalComponentResources resources = mockInternalComponentResources();


        Component component = setupForIntegrationTest(resources);


        // On first invocation, the resources are queried.


        long value = 123456;


        train_isLoaded(resources, true);
        train_isBound(resources, "invariantPrimitive", true);
        train_readParameter(resources, "invariantPrimitive", Long.class, value);


        replay();


        assertEquals(access.get(component, "invariantPrimitive"), value);


        verify();


        // No further training needed here.


        replay();


        // Still cached ...


        assertEquals(access.get(component, "invariantPrimitive"), value);


        component.postRenderCleanup();


        // Still cached ...


        assertEquals(access.get(component, "invariantPrimitive"), value);

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    @Test
    public void changes_before_load_become_defaults_and_dont_update_bindings() throws Exception
    {
        InternalComponentResources resources = mockInternalComponentResources();


        Component component = setupForIntegrationTest(resources);


        train_isLoaded(resources, false);


        replay();


        assertNull(access.get(component, "object"));


        verify();


        train_isLoaded(resources, false);


        replay();


        access.set(component, "object", "new-default");


        verify();


        train_isLoaded(resources, false);


        replay();


        assertEquals(access.get(component, "object"), "new-default");


        verify();


        trainForPageDidLoad(resources);


        replay();


        component.containingPageDidLoad();


        verify();


        // For the set ...


        train_isLoaded(resources, true);
        train_isBound(resources, "object", false);
        train_isRendering(resources, false);


        // For the first read ...


        train_isLoaded(resources, true);
        train_isBound(resources, "object", false);


        // For the second read (after postRenderCleanup) ...


        train_isLoaded(resources, true);
        train_isBound(resources, "object", false);


        replay();


        access.set(component, "object", "new-value");
        assertEquals(access.get(component, "object"), "new-value");


        component.postRenderCleanup();


        assertEquals(access.get(component, "object"), "new-default");


        verify();
    }

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    @Test
    public void cached_object_read() throws Exception
    {
        InternalComponentResources resources = mockInternalComponentResources();


        Component component = setupForIntegrationTest(resources);


        train_isLoaded(resources, true);
        train_isBound(resources, "object", true);
        train_readParameter(resources, "object", String.class, "first");
        train_isRendering(resources, false);


        replay();


        assertEquals(access.get(component, "object"), "first");


        verify();


        // Keeps re-reading the parameter when not rendering.


        train_isLoaded(resources, true);
        train_isBound(resources, "object", true);
        train_readParameter(resources, "object", String.class, "second");
        train_isRendering(resources, false);


        replay();


        assertEquals(access.get(component, "object"), "second");


        verify();


        // Now, when rendering is active, the value is cached


        train_isLoaded(resources, true);
        train_isBound(resources, "object", true);
        train_readParameter(resources, "object", String.class, "third");
        train_isRendering(resources, true);


        replay();


        assertEquals(access.get(component, "object"), "third");


        // Does not cause readParameter() to be invoked:


        assertEquals(access.get(component, "object"), "third");


        verify();


        train_isLoaded(resources, true);
        train_isBound(resources, "object", true);
        train_readParameter(resources, "object", String.class, "fourth");
        train_isRendering(resources, false);


        replay();


        component.postRenderCleanup();


        assertEquals(access.get(component, "object"), "fourth");


        verify();
    }

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