package er.extensions.components;
import org.apache.log4j.Logger;
import com.webobjects.appserver.WOActionResults;
import com.webobjects.appserver.WOAssociation;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.appserver.WOElement;
import com.webobjects.appserver.WORequest;
import com.webobjects.appserver.WOResponse;
import com.webobjects.appserver._private.WODynamicElementCreationException;
import com.webobjects.appserver._private.WODynamicGroup;
import com.webobjects.foundation.NSDictionary;
import com.webobjects.foundation.NSMutableDictionary;
/**
* Needed when you have a component content and the state of the wrapper changes.
* In that case, you might get the same element id and then switch components will get the
* wrong value from their cache. It's very hard to explain, take a look at the ERXTabPanel :)
* @binding id is to append to the element ID
* @author ak
*/
public class ERXUniquingWrapper extends WODynamicGroup {
private static final Logger log = Logger.getLogger(ERXTolerantWrapper.class);
private WOAssociation _id;
public ERXUniquingWrapper(String name, NSDictionary associations, WOElement template) {
super(name, associations, template);
_id = (WOAssociation) ((NSMutableDictionary) associations).removeObjectForKey("id");
if(_id == null) {
throw new WODynamicElementCreationException("ERXUniquingWrapper needs an 'id' binding." );
}
}
private String id(WOComponent component) {
Object value = _id.valueInComponent(component);
return value != null ? value.toString() : "" + hashCode();
}
@Override
public void appendToResponse(WOResponse response, WOContext context) {
context.appendElementIDComponent(id(context.component()));
super.appendToResponse(response, context);
context.deleteLastElementIDComponent();
}
@Override
public WOActionResults invokeAction(WORequest request, WOContext context) {
context.appendElementIDComponent(id(context.component()));
WOActionResults result = super.invokeAction(request, context);
context.deleteLastElementIDComponent();
return result;
}
@Override
public void takeValuesFromRequest(WORequest request, WOContext context) {
context.appendElementIDComponent(id(context.component()));
super.takeValuesFromRequest(request, context);
context.deleteLastElementIDComponent();
}
}