/**
* This method derives the content.
*
* @return The derived content
*/
protected java.util.List<Object> deriveContent() {
java.util.List<Object> ret = new java.util.ArrayList<Object>();
ActiveCollection parent = getParent();
Predicate pred = getPredicate();
ActiveCollectionContext context = getContext();
if (parent != null && pred != null) {
for (Object value : (ActiveList) parent) {
if (pred.evaluate(context, value)) {
ret.add(value);
}
}
}
return (ret);
}
/**
* This constructor initializes the active list as a derived version of the supplied collection,
* that applies the supplied predicate.
*
* @param name The name
* @param parent The parent collection
* @param context The context
* @param predicate The predicate
* @param properties The optional properties
*/
protected ActiveList(
String name,
ActiveCollection parent,
ActiveCollectionContext context,
Predicate predicate,
java.util.Map<String, Object> properties) {
super(name, parent, context, predicate, properties);
if (isActive()) {
// Filter the parent list items, to determine which pass the predicate
for (Object value : (ActiveList) parent) {
if (predicate.evaluate(context, value)) {
insert(null, value);
}
}
}
}