Extension and Extension point(扩展与扩展点).ppt

Ace BackGround The Structure Of Eclipse Eclipse is an open source, extensible development platform based on Java. In itself, it is just a framework and a set of services, For through the plug-in components to construct development environment. Common Plugin Doclipse SWTDesigner HTMLEditor XMLBuddy BackGround How to communicate between the plugin? BackGround Communication mechanism between the plug-in BackGround Explanation Extension Point What Emelent and Attribute Do you have any question? ? 2003 TIBCO Software Inc. All Rights Reserved. Confidential and Proprietary. ? 2005 TIBCO Software Inc. All Rights Reserved. Confidential and Proprietary. Extension and Extension point Overview What is Extension and Extension point Eclipse provides the concept of extension and extension point to facilitate that functionality can be contributed to plugins by other plugins, which define extension points open themself up for other plugins, A extension points defines a contact how other plugins can contribute. An extension point is a hook that allows two plug-ins to communicate through the exchange of data or code. All extension points are defined in XML. these are then stored in the Extension Registry and accessed on demand from client plug-ins. One nice feature of Eclipses Extension Registry is that it is possible to dynamically link plug-ins together at runtime but prior to the bundle having been started. The Extension Registry is also cached, so that the second time you start up Eclipse, it starts faster than it did previously. Demo Extension Some Extension point org.eclipse.ui.views org.eclipse.ui.popupMenus org.eclipse.ui.actionSets(Demo) Announcements ID Interface or Abstract Extension Point How Demo Announcements ID Interface or Abstract Schema Extension Point Question? Interface Abstract Interface and Abstract Extension Point Use Demo Summarize A plugin defines an Extension Point This plugin allow other plugins to add functionality based on the defi