Method ArrayTable

output/java_guava/1.4.16/ArrayTable.java:149–167

(Iterable<? extends R> rowKeys, Iterable<? extends C> columnKeys)

  private final ImmutableMap<C, Integer> columnKeyToIndex;
  private final V[][] array;
  private ArrayTable(Iterable<? extends R> rowKeys, Iterable<? extends C> columnKeys) {
    this.rowList = ImmutableList.copyOf(rowKeys);
    this.columnList = ImmutableList.copyOf(columnKeys);
    checkArgument(!rowList.isEmpty());
    checkArgument(!columnList.isEmpty());

    /*
     * TODO(jlevy): Support empty rowKeys or columnKeys? If we do, when
     * columnKeys is empty but rowKeys isn't, the table is empty but
     * containsRow() can return true and rowKeySet() isn't empty.
     */
    rowKeyToIndex = Maps.indexMap(rowList);
    columnKeyToIndex = Maps.indexMap(columnList);
    @SuppressWarnings("unchecked")
    V[][] tmpArray = (V[][]) new Object[rowList.size()][columnList.size()];
    array = tmpArray;
    // Necessary because in GWT the arrays are initialized with "undefined" instead of null.
    eraseAll();
  }

  private ArrayTable(Table<R, C, V> table) {
    this(table.rowKeySet(), table.columnKeySet());