Package org.apache.mahout.cf.taste.impl.common

Examples of org.apache.mahout.cf.taste.impl.common.FastIDSet.removeAll()

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        for (int i = 0; i < prefsLength; i++) {
          addSomeOf(possibleItemsIDs, dataModel.getItemIDsFromUser(prefs.getUserID(i)));
        }
      }
    }
    possibleItemsIDs.removeAll(preferredItemIDs);
    return possibleItemsIDs;
  }
 
  private void addSomeOf(FastIDSet possibleItemIDs, FastIDSet itemIDs) {
    if (itemIDs.size() > maxItemsPerUser) {
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          addSomeOf(possibleItemsIDs, dataModel.getItemIDsFromUser(prefs.getUserID(i)));
        }
      }
    }
    if (!includeKnownItems) {
      possibleItemsIDs.removeAll(preferredItemIDs);
    }
    return possibleItemsIDs;
  }

  private void addSomeOf(FastIDSet possibleItemIDs, FastIDSet itemIDs) {
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    FastIDSet possibleItemIDs = new FastIDSet();
    for (long userID : theNeighborhood) {
      possibleItemIDs.addAll(dataModel.getItemIDsFromUser(userID));
    }
    if (!includeKnownItems) {
      possibleItemIDs.removeAll(dataModel.getItemIDsFromUser(theUserID));
    }
    return possibleItemIDs;
  }
 
  @Override
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    FastIDSet possibleItemIDs = new FastIDSet();
    for (long userID : theNeighborhood) {
      possibleItemIDs.addAll(dataModel.getItemIDsFromUser(userID));
    }
    if (!includeKnownItems) {
      possibleItemIDs.removeAll(dataModel.getItemIDsFromUser(theUserID));
    }
    return possibleItemIDs;
  }
 
  @Override
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    LongPrimitiveIterator allItemIDs = dataModel.getItemIDs();
    while (allItemIDs.hasNext()) {
      possibleItemIDs.add(allItemIDs.nextLong());
    }
    if (!includeKnownItems) {
      possibleItemIDs.removeAll(preferredItemIDs);
    }
    return possibleItemIDs;
  }
}
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    FastIDSet candidateItemIDs = new FastIDSet();
    for (long itemID : preferredItemIDs) {
      candidateItemIDs.addAll(similarity.allSimilarItemIDs(itemID));
    }
    if (!includeKnownItems) {
      candidateItemIDs.removeAll(preferredItemIDs);
    }
    return candidateItemIDs;
  }
}
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      for (int index = 0; index < numUsersPreferringItem; index++) {
        possibleItemsIDs.addAll(dataModel.getItemIDsFromUser(itemPreferences.getUserID(index)));
      }
    }
    if (!includeKnownItems) {
      possibleItemsIDs.removeAll(preferredItemIDs);
    }
    return possibleItemsIDs;
  }

}
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    long[] seenItemIDs) throws TasteException {
      FastIDSet possibleItemsIDs = new FastIDSet();
      possibleItemsIDs.addAll(this.validItemIDs);

      if (seenItemIDs != null)
        possibleItemsIDs.removeAll(seenItemIDs);

      return possibleItemsIDs;
  }

  // override for AbstractCandidateItemsStrategy
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