/**
* This method is called to aggregate the list of services that the widgets relevant to this
* widget provide. This allows the server to act as a proxy to the individual widgets' services.
* This should be called after a constructor sets the widget handles to use or after setWidgets()
* has been called.
*
* @return the server services
*/
protected Services initServices() {
if (widgets == null) {
return null;
}
Services services = new Services();
for (int i = 0; i < widgets.size(); i++) {
WidgetHandle handle = widgets.getWidgetHandleAt(i);
DataObject widgetServices =
getWidgetServices(handle.getHostName(), handle.getPort(), handle.getId());
String error = new Error(widgetServices).getError();
if (error != null) {
if (error.equals(Error.NO_ERROR)) {
ServiceDescriptions wServices = new ServiceDescriptions(widgetServices);
for (int j = 0; j < wServices.numServiceDescriptions(); j++) {
ServiceDescription desc = wServices.getServiceDescriptionAt(j);
services.addService(
new InheritedService(
this,
getId(),
desc.getName(),
desc.getFunctionDescriptions(),
handle.getHostName(),
Integer.toString(handle.getPort()),
handle.getId()));
}
}
}
}
services.addServices(setServerServices());
return services;
}
/**
* This method is called to aggregate the list of constant attributes that the widgets relevant to
* this server provide. This should be called after a constructor sets the widget handles to use
* or after setWidgets() has been called.
*
* @return AttributeNameValues the server constant attributes
*/
protected Attributes initConstantAttributes() {
// this protects us against the Widget constructor
// that calls us too early (we havent' got the widgets yet)
// it's good practice anyway
if (widgets == null) {
return null;
}
Attributes atts = new Attributes();
for (int i = 0; i < widgets.size(); i++) {
WidgetHandle handle = widgets.getWidgetHandleAt(i);
DataObject widgetAtts =
getWidgetConstantAttributes(handle.getHostName(), handle.getPort(), handle.getId());
String error = new Error(widgetAtts).getError();
if (error != null) {
if (error.equals(Error.NO_ERROR)) {
Attributes wAtts = new Attributes(widgetAtts);
for (int j = 0; j < wAtts.numAttributes(); j++) {
AttributeNameValue wAtt = (AttributeNameValue) wAtts.getAttributeAt(j);
if (atts.getAttributeNameValue(wAtt.getName()) == null) {
atts.addAttributeNameValue(wAtt);
}
}
}
}
}
atts.addAttributes(setServerConstantAttributes());
return atts;
}
/**
* This method is called to subscribe to the widgets this server is interested in. It allows the
* server to act as a proxy to the callbacks provided by each individual widget. This should be
* called after a constructor sets the widget handles to use or after setWidgets() has been
* called.
*
* @see #setCallbacks()
*/
protected Callbacks initCallbacks() {
// this protects us against the Widget constructor
// that calls us too early (we havent' got the widgets yet)
// it's good practice anyway
if (widgets == null) {
return null;
}
Callbacks calls = new Callbacks();
// For all widgets
for (int i = 0; i < widgets.size(); i++) {
WidgetHandle handle = widgets.getWidgetHandleAt(i);
addWidgetCallbacksSubscription(handle, calls);
}
calls.addCallbacks(setServerCallbacks());
return calls;
}
/**
* This method allows to subscribe to a new widget
*
* @param handle The widget to subscribe to
* @author Agathe
*/
protected void addCallback(WidgetHandle handle) {
// Add that to widgets
widgets.addWidgetHandle(handle);
Callbacks calls = new Callbacks();
// Get the callbacks and subscribe
addWidgetCallbacksSubscription(handle, calls);
// Add the calls to callbacks
callbacks.addCallbacks(calls);
// Update the discoverer
if (discoverer != null) {
this.discovererUpdate();
}
}