/**
* Call the closure once for each document in this corpus, loading and unloading documents as
* appropriate in the case of a persistent corpus.
*
* @param self the corpus to traverse
* @param closure the closure to call
* @return the corpus.
*/
public static <T> Object each(Corpus self, Closure<T> closure) {
for (int i = 0; i < self.size(); i++) {
boolean docWasLoaded = self.isDocumentLoaded(i);
Document doc = self.get(i);
closure.call(doc);
if (!docWasLoaded) {
self.unloadDocument(doc);
Factory.deleteResource(doc);
}
}
return self;
}
/**
* Call the closure once for each document in this corpus, loading and unloading documents as
* appropriate in the case of a persistent corpus, and adding the return values of each call to
* the given collection.
*
* @param self the corpus to traverse
* @param closure the closure to call
* @return a list of the return values from each closure call.
*/
public static <T> Collection<T> collect(Corpus self, Collection<T> coll, Closure<T> closure) {
for (int i = 0; i < self.size(); i++) {
boolean docWasLoaded = self.isDocumentLoaded(i);
Document doc = self.get(i);
coll.add(closure.call(doc));
if (!docWasLoaded) {
self.unloadDocument(doc);
Factory.deleteResource(doc);
}
}
return coll;
}