示例#1
0
 @Override
 public Data getBuffer() {
   return new Data(transformer.getBuffer(), data.getHeader(), data.getMap(), data.getDictionary());
 }
示例#2
0
  @Override
  protected void initializeInternal(
      final DataDefinition definition,
      final Data input,
      final GeneralizationHierarchy[] ahierarchies,
      final ARXConfiguration config) {

    // Obtain dictionary
    final Dictionary dictionary = input.getDictionary();

    // Obtain research subset
    RowSet rSubset = null;
    if (config.containsCriterion(DPresence.class)) {
      Set<DPresence> crits = config.getCriteria(DPresence.class);
      if (crits.size() > 1) {
        throw new IllegalArgumentException("Only one d-presence criterion supported!");
      }
      for (DPresence dPresence : crits) {
        rSubset = dPresence.getSubset().getSet();
      }
    }

    // Create reference to the hierarchies
    final int[][] data = input.getArray();
    hierarchies = new int[data[0].length][][];
    for (int i = 0; i < ahierarchies.length; i++) {
      hierarchies[i] = ahierarchies[i].getArray();
      // Column -> Id -> Level -> Output
    }

    // Initialize counts
    cardinalities = new int[data[0].length][][];
    for (int i = 0; i < cardinalities.length; i++) {
      cardinalities[i] =
          new int[dictionary.getMapping()[i].length][ahierarchies[i].getArray()[0].length];
      // Column -> Id -> Level -> Count
    }

    for (int i = 0; i < data.length; i++) {
      // only use the rows contained in the research subset
      if (rSubset == null || rSubset.contains(i)) {
        final int[] row = data[i];
        for (int column = 0; column < row.length; column++) {
          cardinalities[column][row[column]][0]++;
        }
      }
    }

    // Create counts for other levels
    for (int column = 0; column < hierarchies.length; column++) {
      final int[][] hierarchy = hierarchies[column];
      for (int in = 0; in < hierarchy.length; in++) {
        final int cardinality = cardinalities[column][in][0];
        for (int level = 1; level < hierarchy[in].length; level++) {
          final int out = hierarchy[in][level];
          cardinalities[column][out][level] += cardinality;
        }
      }
    }

    // Create a cache for the results
    cache = new double[hierarchies.length][];
    for (int i = 0; i < cache.length; i++) {
      cache[i] = new double[ahierarchies[i].getArray()[0].length];
      Arrays.fill(cache[i], NA);
    }
  }