Custom DataProvider Nattable

Question

I create nattable the following way. But I can get access to the cells only through getters and setters in my Student class. How else can I access cells? Should I create my own BodyDataProvider or use IDataProvider? If it is true, could someone give some examples of implementing such providers?

    final ColumnGroupModel columnGroupModel = new ColumnGroupModel();
    ColumnHeaderLayer columnHeaderLayer;
    String[] propertyNames = { "name", "groupNumber", "examName", "examMark" };

    Map<String, String> propertyToLabelMap = new HashMap<String, String>();
    propertyToLabelMap.put("name", "Full Name");
    propertyToLabelMap.put("groupNumber", "Group");
    propertyToLabelMap.put("examName", "Name");
    propertyToLabelMap.put("examMark", "Mark");

    DefaultBodyDataProvider<Student> bodyDataProvider = new DefaultBodyDataProvider<Student>(students,
            propertyNames);

    ColumnGroupBodyLayerStack bodyLayer = new ColumnGroupBodyLayerStack(new DataLayer(bodyDataProvider),
            columnGroupModel);

    DefaultColumnHeaderDataProvider defaultColumnHeaderDataProvider = new DefaultColumnHeaderDataProvider(
            propertyNames, propertyToLabelMap);
    DefaultColumnHeaderDataLayer columnHeaderDataLayer = new DefaultColumnHeaderDataLayer(
            defaultColumnHeaderDataProvider);
    columnHeaderLayer = new ColumnHeaderLayer(columnHeaderDataLayer, bodyLayer, bodyLayer.getSelectionLayer());
    ColumnGroupHeaderLayer columnGroupHeaderLayer = new ColumnGroupHeaderLayer(columnHeaderLayer,
            bodyLayer.getSelectionLayer(), columnGroupModel);

    columnGroupHeaderLayer.addColumnsIndexesToGroup("Exams", 2, 3);
    columnGroupHeaderLayer.setGroupUnbreakable(2);

    final DefaultRowHeaderDataProvider rowHeaderDataProvider = new DefaultRowHeaderDataProvider(bodyDataProvider);
    DefaultRowHeaderDataLayer rowHeaderDataLayer = new DefaultRowHeaderDataLayer(rowHeaderDataProvider);
    ILayer rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer, bodyLayer, bodyLayer.getSelectionLayer());

    final DefaultCornerDataProvider cornerDataProvider = new DefaultCornerDataProvider(
            defaultColumnHeaderDataProvider, rowHeaderDataProvider);
    DataLayer cornerDataLayer = new DataLayer(cornerDataProvider);
    ILayer cornerLayer = new CornerLayer(cornerDataLayer, rowHeaderLayer, columnGroupHeaderLayer);

    GridLayer gridLayer = new GridLayer(bodyLayer, columnGroupHeaderLayer, rowHeaderLayer, cornerLayer);

    NatTable table = new NatTable(shell, gridLayer, true);

score 0 · Answer 1 · answered May 15 '18 at 05:26

As answered in your previous question How do I fix NullPointerException and putting data into NatTable, this is explained in the NatTable Getting Started Tutorial.

If you need some sample code try the NatTable Examples Application

And from knowing your previous question, your data structure does not work in a table, as you have nested objects where the child objects are stored in an array. So this is more a tree and not a table.

Custom DataProvider Nattable

1 Answers1