Feedback objects

A WVCM Feedback object is a structure for requesting additional feedback from the server during a server interaction. A PropertyRequest is one instance of Feedback. DetailedFeedback is another instance that allows the retrieval of specific properties from multiple resources in one server interaction.

Almost all do methods accept a Feedback argument. As the operation executes, the DetailedFeedback object is passed resource proxies that contain the property values requested by the DetailedFeedback object. For example:

final ResourceList<Resource> modified = provider.resourceList();
    // Write properties from the current dialog tab 
    // and fetch the properties for the "newTab"
    Feedback request = new DetailedFeedback() {
        public PropertyRequest getPropertyRequestForModified()
            {
                return DISPLAY_PROPERTIES_FOR_SIDE_EFFECTS;
            }
        public PropertyRequest getPropertyRequestForResult()
            {
                return computePropertiesNeededForTab(newTab);
            }
            public boolean isAbortRequested()
            {
                return false;
            }
            public void notifyActive(String message)
            {
            }
            public void notifyIsModified(Resource resource)
            {
                modified.add(record);
            }
            public void notifyPercentComplete(int percentComplete)
            {
            }
};
    CcView newTab = (CcView)view.doWriteProperties(request);

    // Update display to reflect side-effects of the operation
    RefreshDisplay(modified);
    if (isEmpty(view.updatedPropertyNameList())) {
        // All fields were written, so proceed to next tab...
        record = newTab;
        // setup the new tab...
    } else {
        // Report failures and stay on the old tab
    }