Examples of org.apache.tapestry.runtime.Component

org.apache.tapestry.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.
This interface is likely to change without notice.

    @Test
    public void root_element_of_page()
    {
        RequestPageCache cache = mockRequestPageCache();
        Page page = mockPage();
        Component component = mockComponent();


        train_get(cache, PAGE_NAME, page);


        train_getRootComponent(page, component);

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    public void nested_element_within_page()
    {
        RequestPageCache cache = mockRequestPageCache();
        Page page = mockPage();
        ComponentPageElement element = mockComponentPageElement();
        Component component = mockComponent();


        train_get(cache, PAGE_NAME, page);


        train_getComponentElementByNestedId(page, NESTED_ELEMENT_ID, element);

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    @Test
    public void get_page_by_logical_name()
    {
        RequestPageCache cache = mockRequestPageCache();
        Page page = mockPage();
        Component component = mockComponent();


        train_get(cache, PAGE_NAME, page);
        train_getRootComponent(page, component);


        replay();

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    public void special_prop_binding_value_null()
    {
        Location l = mockLocation();
        String description = "my description";
        ComponentResources resources = mockComponentResources();
        Component component = mockComponent();


        train_getComponent(resources, component);


        replay();

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


        Component component = setupForIntegrationTest(resources);


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


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


        replay();


        _access.set(component, "object", "first");
        assertEquals(_access.get(component, "object"), "second");


        verify();


        // Now try during rendering ...


        train_isLoaded(resources, true);
        train_isBound(resources, "object", true);
        resources.writeParameter("object", "third");
        train_isRendering(resources, true);


        replay();


        _access.set(component, "object", "third");
        assertEquals(_access.get(component, "object"), "third");


        verify();


        // And the cached value is lost after rendering is complete.


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


        Component component = setupForIntegrationTest(resources);


        train_isLoaded(resources, true);
        train_isBound(resources, "primitive", true);
        resources.writeParameter("primitive", 321);


        train_isRendering(resources, false);


        train_isLoaded(resources, true);
        train_isBound(resources, "primitive", true);
        train_readParameter(resources, "primitive", int.class, 123);
        train_isRendering(resources, false);


        replay();


        _access.set(component, "primitive", 321);
        assertEquals(_access.get(component, "primitive"), 123);


        verify();


        // Now try during rendering ...


        train_isLoaded(resources, true);
        train_isBound(resources, "primitive", true);
        resources.writeParameter("primitive", 567);
        train_isRendering(resources, true);


        replay();


        _access.set(component, "primitive", 567);
        assertEquals(_access.get(component, "primitive"), 567);


        verify();


        // And the cached value is lost after rendering is complete.


        train_isLoaded(resources, true);
        train_isBound(resources, "primitive", true);
        train_readParameter(resources, "primitive", int.class, 890);
        train_isRendering(resources, false);


        replay();


        component.postRenderCleanup();


        assertEquals(_access.get(component, "primitive"), 890);


        verify();
    }

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