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https://issues.apache.org/struts/browse/SHALE-425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_40601
]
Matthias Wuttke commented on SHALE-425:
---------------------------------------
Don't know if this can be helpful:
package teuto.base.shale;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import org.apache.shale.view.Constants;
import org.apache.shale.view.ViewControllerMapper;
import org.apache.shale.view.impl.DefaultViewControllerMapper;
/**
* ViewControllerMapper that allows for dynamic
* registration of mappings at runtime or application startup.
* Provides convenience methods for registering a mapping
* for the currently executing controller bean and
* the view currently rendered.
* @author Matthias Wuttke
*/
public class MemoryViewControllerMapper
extends DefaultViewControllerMapper {
/**
* Returns the name of the controller bean to
* be used with the passed view id. Falls back
* to the default Shale implementation if there
* is no dynamically registered view controller.
* @param viewId view id
* @return controller name
*/
public String mapViewId(String viewId) {
String beanName = mapping.get(viewId);
if (beanName != null)
return beanName;
return super.mapViewId(viewId);
}
/**
* Registers a mapping for the given view id and
* bean name.
* @param viewId id of the view
* @param beanName name of the controller bean
*/
public void registerMapping(String viewId, String beanName) {
if (!mapping.containsKey(viewId))
mapping.put(viewId, beanName);
}
/**
* Registers the given bean for the view that is
* currently being rendered.
* @param beanName name of the controller bean
*/
public void registerMapping(String beanName) {
FacesContext ctx = FacesContext.getCurrentInstance();
UIViewRoot viewRoot = ctx.getViewRoot();
if (viewRoot != null) {
String viewId = viewRoot.getViewId();
registerMapping(viewId, beanName);
}
}
/**
* Convenience method for registering multiple
* mappings at once. This can be used to initialize
* this class from a properties file.
* @param mappings
*/
public void setMappings(Properties mappings) {
for (Object key : mappings.keySet())
mapping.put((String)key,
mappings.getProperty((String)key));
}
/**
* Convenience method for retrieving the instance of
* this object from the Faces application context.
* @return instance or null
*/
public static MemoryViewControllerMapper getInstance() {
FacesContext ctx = FacesContext.getCurrentInstance();
if (ctx != null) {
ViewControllerMapper vcm = (ViewControllerMapper)
ctx.getExternalContext().getApplicationMap().get(Constants.VIEW_MAPPER);
if (vcm instanceof MemoryViewControllerMapper)
return (MemoryViewControllerMapper)vcm;
}
return null;
}
private Map<String, String> mapping =
new HashMap<String, String>();
}
> ViewControllerMapper allows mapping only to one bean
> ----------------------------------------------------
>
> Key: SHALE-425
> URL: https://issues.apache.org/struts/browse/SHALE-425
> Project: Shale
> Issue Type: Improvement
> Components: View
> Affects Versions: 1.0.4
> Reporter: Matthias Wuttke
> Priority: Minor
>
> ViewControllerMapper.mapViewId(String viewId) allows only to map a view to a
> single bean. A key feature of JSF (IMHO) is the ability to have multiple
> backing beans / view controllers that contribute to a single page. An
> extension of this interface could allow other mapping strategies to associate
> multiple beans with a given page that can then receive phase change events. A
> possiblte mapping strategy would be a XmlViewControllerMapper which takes a
> XML file that associates view ids with bean names.
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