Examples of org.apache.tapestry.services.ComponentConstructor

org.apache.tapestry.services.ComponentConstructor
Starting with 4.0, copmonents do not always have a zero-args constructor; the enhanced subclass may take some parameters used to initialize instance variables. This interface represents a wrapper around a constructor and an array of parameters that can be used to stamp out new instances of a component. @author Howard M. Lewis Ship @since 4.0

        String className = _pageClassProvider.providePageClassName(context);


        String pageName = namespace.constructQualifiedName(name);
        Location location = spec.getLocation();


        ComponentConstructor cc = _componentConstructorFactory.getComponentConstructor(
                spec,
                className);


        try
        {
            result = (IPage) cc.newInstance();


            result.setNamespace(namespace);
            result.setPageName(pageName);
            result.setPage(result);
            result.setLocale(_locale);
            result.setLocation(location);
        }
        catch (ClassCastException ex)
        {
            throw new ApplicationRuntimeException(PageloadMessages.classNotPage(cc
                    .getComponentClass()), location, ex);
        }


        return result;
    }

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        String ref2 = eo.getClassReference(Map.class);


        eo.addMethod(Modifier.PUBLIC, new MethodSignature(Class.class, "getClassReference", null,
                null), "return " + ref + ";");


        ComponentConstructor cc = eo.getConstructor();


        GetClassReferenceFixture f = (GetClassReferenceFixture) cc.newInstance();


        assertSame(Map.class, f.getClassReference());


        verifyControls();

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    public void testComponentConstructorFailure()
    {
        Location l = newLocation();


        ComponentConstructor cc = new ComponentConstructorImpl(BaseComponent.class
                .getConstructors()[0], new Object[]
        { "unexpected" }, "<classfab>", l);


        try
        {
            cc.newInstance();
            unreachable();
        }
        catch (ApplicationRuntimeException ex)
        {
            assertExceptionSubstring(

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            if (IPage.class.isAssignableFrom(componentClass))
                throw new ApplicationRuntimeException(PageloadMessages.pageNotAllowed(id),
                        container, spec.getLocation(), null);
        }


        ComponentConstructor cc = _componentConstructorFactory.getComponentConstructor(
                spec,
                className);


        IComponent result = (IComponent) cc.newInstance();


        result.setNamespace(namespace);
        result.setPage(page);
        result.setContainer(container);
        result.setId(id);

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            throw new ApplicationRuntimeException(PageloadMessages.classNotPage(pageClass),
                    location, null);


        String pageName = namespace.constructQualifiedName(name);


        ComponentConstructor cc = _componentConstructorFactory.getComponentConstructor(
                spec,
                className);


        IPage result = (IPage) cc.newInstance();


        result.setNamespace(namespace);
        result.setPageName(pageName);
        result.setPage(result);
        result.setLocale(_locale);

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        return op.getConstructor();
    }


    private ComponentConstructor getComponentConstructor(Class inputClass)
    {
        ComponentConstructor result = (ComponentConstructor) _constructors.get(inputClass);


        if (result == null)
        {
            result = createComponentConstructor(inputClass);

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     * Given a particular abstract class; will create an instance of that class. A subclass is
     * created with all abstract properties filled in with ordinary implementations.
     */
    public Object newInstance(Class abstractClass)
    {
        ComponentConstructor constructor = getComponentConstructor(abstractClass);


        try
        {
            return constructor.newInstance();
        }
        catch (Exception ex)
        {
            throw new ApplicationRuntimeException(ScriptMessages.unableToInstantiate(
                    abstractClass,

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            if (IPage.class.isAssignableFrom(componentClass))
                throw new ApplicationRuntimeException(PageloadMessages.pageNotAllowed(id),
                        container, spec.getLocation(), null);
        }


        ComponentConstructor cc = _componentConstructorFactory.getComponentConstructor(
                spec,
                className);


        IComponent result = (IComponent) cc.newInstance();


        result.setNamespace(namespace);
        result.setPage(page);
        result.setContainer(container);
        result.setId(id);

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            throw new ApplicationRuntimeException(PageloadMessages.classNotPage(pageClass),
                    location, null);


        String pageName = namespace.constructQualifiedName(name);


        ComponentConstructor cc = _componentConstructorFactory.getComponentConstructor(
                spec,
                className);


        IPage result = (IPage) cc.newInstance();


        result.setNamespace(namespace);
        result.setPageName(pageName);
        result.setPage(result);
        result.setLocale(_locale);

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        String ref2 = eo.getClassReference(Map.class);


        eo.addMethod(Modifier.PUBLIC, new MethodSignature(Class.class, "getClassReference", null,
                null), "return " + ref + ";");


        ComponentConstructor cc = eo.getConstructor();


        GetClassReferenceFixture f = (GetClassReferenceFixture) cc.newInstance();


        assertSame(Map.class, f.getClassReference());


        verifyControls();

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