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

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

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    } catch (IOException e) {
      throw new TasteException("Failed to retrieve item preferences from HBase", e);
    }

    if (results[0].isEmpty()) {
      throw new NoSuchItemException(itemID1);
    }
    if (results[1].isEmpty()) {
      throw new NoSuchItemException(itemID2);
    }

    // First item
    Result result = results[0];
    SortedMap<byte[], byte[]> families = result.getFamilyMap(USERS_CF);
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      newPreferenceArray.set(prefsCounter++, anonymousPreference);
    }

    if (newPreferenceArray.length() == 0) {
      // No, didn't find it among the anonymous user prefs
      throw new NoSuchItemException(itemID);
    }

    return newPreferenceArray;
  }
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      newPreferenceArray.set(prefsCounter++, anonymousPreference);
    }

    if (newPreferenceArray.length() == 0) {
      // No, didn't find it among the anonymous user prefs
      throw new NoSuchItemException(itemID);
    }

    return newPreferenceArray;
  }
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        return cloneAndMergeInto(delegatePrefs, itemID, tempPrefs.getUserID(i), tempPrefs.getValue(i));
      }
    }
    if (delegatePrefs == null) {
      // No, didn't find it among the anonymous user prefs
      throw new NoSuchItemException(itemID);
    }
    return delegatePrefs;
  }
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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws NoSuchItemException {
    FastIDSet userIDs = preferenceForItems.get(itemID);
    if (userIDs == null) {
      throw new NoSuchItemException(itemID);
    }
    PreferenceArray prefArray = new BooleanItemPreferenceArray(userIDs.size());
    int i = 0;
    LongPrimitiveIterator it = userIDs.iterator();
    while (it.hasNext()) {
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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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  @Override
  public PreferenceArray getPreferencesForItem(long itemID) throws TasteException {
    List<Preference> list = doGetPreferencesForItem(itemID);
    if (list.isEmpty()) {
      throw new NoSuchItemException(itemID);
    }
    return new GenericItemPreferenceArray(list);
  }
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    public PreferenceArray get(Long itemID) throws TasteException {
      SliceQuery<Long,Long,Float> query = buildValueSliceQuery(ITEMS_CF);
      query.setKey(itemID);
      ColumnSlice<Long,Float> result = query.execute().get();
      if (result == null) {
        throw new NoSuchItemException(itemID);
      }
      List<HColumn<Long,Float>> userIDColumns = result.getColumns();
      if (userIDColumns.isEmpty()) {
        throw new NoSuchItemException(itemID);
      }
      int size = userIDColumns.size();
      PreferenceArray prefs = new GenericItemPreferenceArray(size);
      prefs.setItemID(0, itemID);
      for (int i = 0; i < size; i++) {
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    public FastIDSet get(Long itemID) throws TasteException {
      SliceQuery<Long,Long,byte[]> query = buildNoValueSliceQuery(ITEMS_CF);
      query.setKey(itemID);
      ColumnSlice<Long,byte[]> result = query.execute().get();
      if (result == null) {
        throw new NoSuchItemException(itemID);
      }
      List<HColumn<Long,byte[]>> columns = result.getColumns();
      FastIDSet userIDs = new FastIDSet(columns.size());
      for (HColumn<Long,?> userIDColumn : columns) {
        userIDs.add(userIDColumn.getName());
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  }

  public double[] getItemFeatures(long itemID) throws NoSuchItemException {
    Integer index = itemIDMapping.get(itemID);
    if (index == null) {
      throw new NoSuchItemException(itemID);
    }
    return itemFeatures[index];
  }
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