public static void decodedStateOfTreeData()

in tobago-core/src/main/java/org/apache/myfaces/tobago/internal/util/RenderUtils.java [151:214]
50 lines of code
15 McCabe index (conditional complexity)

  public static void decodedStateOfTreeData(final FacesContext facesContext, final AbstractUIData data) {

    if (!data.isTreeModel()) {
      return;
    }

    // selected
    final List<Integer> selectedIndices = decodeIndices(facesContext, data, AbstractUIData.SUFFIX_SELECTED);

    // expanded
    final List<Integer> expandedIndices = decodeIndices(facesContext, data, AbstractUIData.SUFFIX_EXPANDED);

    final int last = data.isRowsUnlimited() ? Integer.MAX_VALUE : data.getFirst() + data.getRows();
    for (int rowIndex = data.getFirst(); rowIndex < last; rowIndex++) {
      data.setRowIndex(rowIndex);
      if (!data.isRowAvailable()) {
        break;
      }

      // if the node is not rendered, the state must not be evaluated.
      boolean skip = false;
      for (final UIComponent uiComponent : data.getChildren()) {
        if (uiComponent instanceof AbstractUITreeNodeBase && !uiComponent.isRendered()) {
          skip = true;
          break;
        }
      }
      if (skip) {
        continue;
      }

      final TreePath path = data.getPath();

      // selected
      if (selectedIndices != null) {
        final SelectedState selectedState = data.getSelectedState();
        final boolean oldSelected = selectedState.isSelected(path);
        final boolean newSelected = selectedIndices.contains(rowIndex);
        if (newSelected != oldSelected) {
          if (newSelected) {
            selectedState.select(path);
          } else {
            selectedState.unselect(path);
          }
        }
      }

      // expanded
      if (expandedIndices != null) {
        final ExpandedState expandedState = data.getExpandedState();
        final boolean oldExpanded = expandedState.isExpanded(path);
        final boolean newExpanded = expandedIndices.contains(rowIndex);
        if (newExpanded != oldExpanded) {
          if (newExpanded) {
            expandedState.expand(path);
          } else {
            expandedState.collapse(path);
          }
        }
      }

    }
    data.setRowIndex(-1);
  }