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

    {
        Defense.notNull(specification, "specification");


        synchronized (specification)
        {
            ComponentConstructor result = (ComponentConstructor) _cachedConstructors
                    .get(specification);


            if (result == null)
            {
                Class baseClass = _classResolver.findClass(className);


                EnhancementOperationImpl eo = new EnhancementOperationImpl(_classResolver,
                        specification, baseClass, _classFactory, _log);


                // Invoking on the chain is the same as invoking on every
                // object in the chain (because method performEnhancement() is type void).


                _chain.performEnhancement(eo, specification);


                result = eo.getConstructor();


                // TODO: This should be optional to work around that IBM JVM bug.


                _validator.validate(baseClass, result.getComponentClass(), specification);


                _cachedConstructors.put(specification, result);
            }


            return result;

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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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                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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