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Only one of controllerUrlor controllerClass should be used. controllerClass The class type of a controller called immediately before the page is inserted. The controller is used to prepare data to be rendered by the inserted tile. Only one of controllerUrlor controllerClass should be used. The class must implement or extend one of the following: org.apache.struts.tiles.Controller, org.apache.struts.tiles.ControllerSupport, or org.apache.struts.action.Action. definition The name of the definition to insert. Definitions are defined in a centralized file. For now, only definitions from a factory can be inserted with this attribute. To insert a definition defined with the definition tag, use beanName=”". flush trueor false. If true, the current page output stream is flushed before tile insertion. ignore If this attribute is set to true and the attribute specified by the name does not exist, simply return without writing anything. The default value is false, which will cause a runtime exception to be thrown. name The name of an entity to insert. The search is done in this order: definition, attribute, then page. page A string representing the URI of a tile or template. The template, page, and component attributes have exactly the same behavior. role If the user is in the specified role, the tag is taken into account; otherwise, the tag is skipped and the content is not written out. template A string representing the URI of a tile or template. The template, page, and component attributes have exactly the same behavior. Several examples of the insert tag were shown earlier in this chapter. 14.4.2 The definition Tag The definition tag is used to create a tile (template) definition as a bean. The newly created bean will be saved under the specified id, in the requested scope. The definition tag has the same syntax as the insert tag. The new definition can extend a definition described in the definition factory (XML file) and may overload any previously defined parameters. Table 14-3 lists the attributes supported by the definition tag. Table 14-3. Attributes for the definition tag Attribute name Description extends The name of a parent definition that is used to initialize this new definition.The parent definition is searched in the definitions factory. id The name under which the newly created definition bean will be saved. This attribute is required.
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