/**
* 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;
}
