[gatein-issues] [JBoss JIRA] (GTNPORTAL-3529) Enhance UI container layout fully extensible and customizable

Enhance UI container layout fully extensible and customizable ------------------------------------------------------------- Key: GTNPORTAL-3529 URL: https://issues.jboss.org/browse/GTNPORTAL-3529 Project: GateIn Portal Issue Type: Enhancement Security Level: Public(Everyone can see) Components: WebUI Affects Versions: 3.8.2.Final Reporter: Vu Viet Phuong Assignee: Vu Viet Phuong Fix For: 3.9.0.Final In PortalDataMapper, we have this {code} if (UITabContainer.TAB_CONTAINER.equals(container.getFactoryId())) { uiTempContainer = uiContainer.createUIComponent(context, UITabContainer.class, null, null); } else if (UIColumnContainer.COLUMN_CONTAINER.equals(container.getFactoryId())) { uiTempContainer = uiContainer.createUIComponent(context, UIColumnContainer.class, null, null); } else { ... {code} - This should be improved by making it more flexible, and extensible. Using ServiceLoader to load the factories class that help to create UIContainer by their factory-id - The proposed solution is: using factory-id attribute of container model to create corresponding UI container type. And the creation task is delegated to a factory service, that can be loaded via service loader. This design make gatein ui container creation more flexible, it's easy to deploy gatein extension which define a new UI container type with new factory-id - factory-id has already be used before in gatein, we use it to create UITabContainer, UIColumnContainer... This issue will add interface for factory service: UIComponentFactory and a default implementation for create current gatein build-in container: DefaultUIContainerFactory. It's declared as a service load by java ServiceLoader - When gatein try to create UI container (from model loaded from database or from xml config file). ServiceLoader will load registered UIComponentFactory services, then delegate creation task with factory-id as argument - A developer can deploy a jar that declare a new ui factory service, then help to create a new type of UI container easily