private boolean isAddButtonVisible() {
    Component inputPanel = this.get(ID_VALUE_CONTAINER).get(ID_INPUT);
    ValueWrapper valueWrapper = valueWrapperModel.getObject();

    if (valueWrapper.isReadonly()) {
      return false;
    }

    ItemWrapper propertyWrapper = valueWrapper.getItem();
    Item property = propertyWrapper.getItem();

    ItemDefinition definition = property.getDefinition();
    int max = definition.getMaxOccurs();
    List<ValueWrapper> usableValues = getUsableValues(propertyWrapper);
    if (usableValues.indexOf(valueWrapper) != usableValues.size() - 1) {
      return false;
    }

    if (max == -1) {
      return true;
    }

    if (countNonDeletedValues(propertyWrapper) >= max) {
      return false;
    }

    if (propertyWrapper.getContainer() == null) {
      return true; // TODO
    }
    return isAccessible(definition, getContainerStatus(propertyWrapper));
  }
  private boolean isRemoveButtonVisible() {
    ValueWrapper valueWrapper = valueWrapperModel.getObject();

    if (valueWrapper.isReadonly()) {
      return false;
    }
    Component inputPanel = this.get(ID_VALUE_CONTAINER).get(ID_INPUT);
    if (inputPanel instanceof ValueChoosePanel
        || inputPanel instanceof AssociationValueChoicePanel) {
      return true;
    }

    ItemWrapper propertyWrapper = valueWrapper.getItem();
    ItemDefinition definition = propertyWrapper.getItem().getDefinition();
    int min = definition.getMinOccurs();

    int count = countNonDeletedValues(propertyWrapper);
    if (count <= 1 || count <= min) {
      return false;
    }

    if (propertyWrapper.getContainer() == null) {
      return true; // TODO
    }

    return isAccessible(definition, getContainerStatus(propertyWrapper));
  }
 private void addValue(AjaxRequestTarget target) {
   Component inputPanel = this.get(ID_VALUE_CONTAINER).get(ID_INPUT);
   ValueWrapper wrapper = valueWrapperModel.getObject();
   ItemWrapper propertyWrapper = wrapper.getItem();
   LOGGER.debug("Adding value of {}", propertyWrapper);
   propertyWrapper.addValue();
   ListView parent = findParent(ListView.class);
   target.add(parent.getParent());
 }
  private boolean hasEmptyPlaceholder(
      ItemWrapper<? extends Item, ? extends ItemDefinition> property) {
    for (ValueWrapper value : property.getValues()) {
      value.normalize(property.getItemDefinition().getPrismContext());
      if (ValueStatus.ADDED.equals(value.getStatus()) && !value.hasValueChanged()) {
        return true;
      }
    }

    return false;
  }
 private int countNonDeletedValues(
     ItemWrapper<? extends Item, ? extends ItemDefinition> property) {
   int count = 0;
   for (ValueWrapper value : property.getValues()) {
     value.normalize(property.getItemDefinition().getPrismContext());
     if (ValueStatus.DELETED.equals(value.getStatus())) {
       continue;
     }
     count++;
   }
   return count;
 }
  private List<ValueWrapper> getUsableValues(
      ItemWrapper<? extends Item, ? extends ItemDefinition> property) {
    List<ValueWrapper> values = new ArrayList<>();
    for (ValueWrapper value : property.getValues()) {
      value.normalize(property.getItemDefinition().getPrismContext());
      if (ValueStatus.DELETED.equals(value.getStatus())) {
        continue;
      }
      values.add(value);
    }

    return values;
  }
  private void removeValue(AjaxRequestTarget target) {
    ValueWrapper wrapper = valueWrapperModel.getObject();
    ItemWrapper propertyWrapper = wrapper.getItem();
    LOGGER.debug("Removing value of {}", propertyWrapper);

    List<ValueWrapper> values = propertyWrapper.getValues();
    Component inputPanel = this.get(ID_VALUE_CONTAINER).get(ID_INPUT);

    switch (wrapper.getStatus()) {
      case ADDED:
        values.remove(wrapper);
        break;
      case DELETED:
        error("Couldn't delete already deleted item: " + wrapper.toString());
        target.add(((PageBase) getPage()).getFeedbackPanel());
      case NOT_CHANGED:
        if (inputPanel instanceof AssociationValueChoicePanel) {
          ((PropertyWrapper) propertyWrapper).setStatus(ValueStatus.DELETED);
        }
        wrapper.setStatus(ValueStatus.DELETED);
        break;
    }

    //        wrapper.getItem().getContainer().

    int count = countUsableValues(propertyWrapper);
    if (count == 0 && !hasEmptyPlaceholder(propertyWrapper)) {
      if (inputPanel instanceof ValueChoosePanel) {
        values.add(
            new ValueWrapper(propertyWrapper, new PrismReferenceValue(null), ValueStatus.ADDED));
      } else if (inputPanel instanceof AssociationValueChoicePanel) {
        Item item = propertyWrapper.getItem();
        ItemPath path = item.getPath();
        if (path != null) {}

        //                values.add(new ValueWrapper(propertyWrapper, new PrismPropertyValue(null),
        // ValueStatus.ADDED));
      } else {
        values.add(
            new ValueWrapper(propertyWrapper, new PrismPropertyValue(null), ValueStatus.ADDED));
      }
    }
    ListView parent = findParent(ListView.class);
    target.add(parent.getParent());
  }
 private ContainerStatus getContainerStatus(ItemWrapper propertyWrapper) {
   final ObjectWrapper objectWrapper = propertyWrapper.getContainer().getObject();
   return objectWrapper != null ? objectWrapper.getStatus() : ContainerStatus.MODIFYING;
 }