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

Examples of org.apache.mahout.cf.taste.common.NoSuchItemException

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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws NoSuchItemException {
    FastIDSet userIDs = preferenceForItems.get(itemID);
    if (userIDs == null) {
      throw new NoSuchItemException();
    }
    PreferenceArray prefArray = new BooleanItemPreferenceArray(userIDs.size());
    int i = 0;
    LongPrimitiveIterator it = userIDs.iterator();
    while (it.hasNext()) {
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    if (itemIDs.length == 0) {
      return 0;
    }
    FastIDSet userIDs = preferenceForItems.get(itemIDs[0]);
    if (userIDs == null) {
      throw new NoSuchItemException();
    }
    FastIDSet intersection = new FastIDSet(userIDs.size());
    intersection.addAll(userIDs);
    int i = 1;
    while (!intersection.isEmpty() && (i < itemIDs.length)) {
      userIDs = preferenceForItems.get(itemIDs[i]);
      if (userIDs == null) {
        throw new NoSuchItemException();
      }
      intersection.retainAll(userIDs);
      i++;
    }
    return intersection.size();
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      rs = stmt.executeQuery();
     
      if (rs.next()) {
        return rs.getDouble(1);
      } else {
        throw new NoSuchItemException();
      }
     
    } catch (SQLException sqle) {
      log.warn("Exception while retrieving user", sqle);
      throw new TasteException(sqle);
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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws NoSuchItemException {
    PreferenceArray prefs = preferenceForItems.get(itemID);
    if (prefs == null) {
      throw new NoSuchItemException();
    }
    return prefs;
  }
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    if (useridx == null) {
      throw new NoSuchUserException();
    }
    Integer itemidx = itemMap.get(itemID);
    if (itemidx == null) {
      throw new NoSuchItemException();
    }
    return predictRating(useridx, itemidx);
  }
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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws NoSuchItemException {
    FastIDSet userIDs = preferenceForItems.get(itemID);
    if (userIDs == null) {
      throw new NoSuchItemException();
    }
    PreferenceArray prefArray = new BooleanItemPreferenceArray(userIDs.size());
    int i = 0;
    LongPrimitiveIterator it = userIDs.iterator();
    while (it.hasNext()) {
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        return newPreferenceArray;
      }
    }
    if (delegatePrefs == null) {
      // No, didn't find it among the anonymous user prefs
      throw new NoSuchItemException(itemID);
    }
    return delegatePrefs;
  }
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    if (!add && !isIDInModel(userID)) {
      throw new NoSuchUserException();
    }
    for (List<String> item : items) {
      if (!add && !isIDInModel(item.get(0))) {
        throw new NoSuchItemException();
      }
    }
  }
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        return newPreferenceArray;
      }
    }
    if (delegatePrefs == null) {
      // No, didn't find it among the anonymous user prefs
      throw new NoSuchItemException();
    }
    return delegatePrefs;
  }
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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws NoSuchItemException {
    PreferenceArray prefs = preferenceForItems.get(itemID);
    if (prefs == null) {
      throw new NoSuchItemException();
    }
    return prefs;
  }
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