排序后表格数据消失

问题描述

如果我在 nattable 中排序，则只显示表格中的第一个单元格，并且我得到 NPE：at org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor.getDataValue(ReflectiveColumnPropertyAccessor.java:74)。所有其他单元格消失。我猜，问题可能出在 composite.setChildLayer(GridRegion.BODY,bodyLayerStack,1);。 sortHeaderLayer 中应该包含 bodyLayerStack 吗？

例如：

ColumnGroupHeaderLayer columnGroupHeaderLayer =
            new ColumnGroupHeaderLayer(sortHeaderLayer,selectionLayer,columnGroupModel);
GridLayer gridLayer =
            new GridLayer(viewportLayer,columnGroupHeaderLayer,rowHeaderLayer,cornerLayer);
NatTable natTable = new NatTable(parent,gridLayer,false);

我的代码：

private NatTable createTable(Composite parent,List<TableLine> tLines,String[][] propertyNames,PropertyToLabels[] propToLabels,TableParams params,TextMatcherEditor<TableLine>editor) {

BodyLayerStack bodyLayerStack =
    new BodyLayerStack(
            tLines,new LineDataProviderColumnAccessor(propertyNames[0].length),params.getColumnIndicesForRowHeaders());

DataLayer bodyDataLayer = bodyLayerStack.getBodyDataLayer();

...
IDataProvider columnHeaderDataProvider =
    new DefaultColumnHeaderDataProvider(propertyNames[0],propToLabels[0].getPropertyToLabels());
DataLayer columnHeaderDataLayer =
    new DefaultColumnHeaderDataLayer(columnHeaderDataProvider);

ILayer columnHeaderLayer =
    new ColumnHeaderLayer(
        columnHeaderDataLayer,(SelectionLayer)null);

//
SortHeaderLayer<TableLine> sortHeaderLayer =
        new SortHeaderLayer<>(
                columnHeaderLayer,new GlazedListsSortModel<>(
                        bodyLayerStack.getSortedList(),new ReflectiveColumnPropertyAccessor<TableLine>(propertyNames[0]),configRegistry,columnHeaderDataLayer));


CompositeLayer composite = new CompositeLayer(1,2);
composite.setChildLayer(GridRegion.COLUMN_HEADER,sortHeaderLayer,0);
composite.setChildLayer(GridRegion.BODY,1);

NatTable natTable = new NatTable(parent,composite,false);
//new CustomTextPainter();
new CustomNatTableContentTooltip(natTable);

// before addConfiguration
natTable.setConfigRegistry(configRegistry);
// to sort on a single click
natTable.addConfiguration(new SingleClickSortConfiguration());

natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
natTable.addConfiguration(new ContextMenuConfiguration(natTable));
natTable.addConfiguration(new AbstractRegistryConfiguration() {
  
  
});
natTable.configure();

editor.setFilterator(new TextFilterator<TableLine>() {

  @Override
  public void getFilterStrings(List<String> baseList,TableLine element) {
    for( int i = 0; i < element.getLength(); i++ )
      baseList.add("" + element.getobjectByColumn(i));
  }
});
editor.setMode(TextMatcherEditor.REGULAR_EXPRESSION);
bodyLayerStack.getFilterList().setMatcherEditor(editor);

NatTableSelectionProvider.addNatTableData(natTable,bodyLayerStack.getSelectionLayer(),bodyLayerStack.getBodyDataProvider());

return natTable;
}

我的解决方案是创建 CustomColumnPropertyAccessor，但它仅适用于具有单行标题的列：

public class CustomColumnPropertyAccessor<R extends TableLine> extends ReflectiveColumnPropertyAccessor<R>
{
public CustomColumnPropertyAccessor(String... propertyNames) 
{
  super(propertyNames);
}

@Override
public Object getDataValue(R rowObj,int columnIndex) 
{
  return ((TableLine) rowObj).getobjectByColumn(columnIndex);
}
}

对于双行标题，我得到：java.lang.indexoutofboundsexception: Index: 5,Size: 1 at java.util.ArrayList.rangeCheck(ArrayList.java:657)

感谢您的任何想法

解决方法

所以我从 CustomColumnPropertyAccessor 中删除了 2row 标题表的索引 [0] 所以我得到：

SortHeaderLayer<TableLine> sortHeaderLayer =
        new SortHeaderLayer<>(
                columnHeaderLayer,new GlazedListsSortModel<>(
                        bodyLayerStack.getSortedList(),new CustomColumnPropertyAccessor<>(propertyNames),configRegistry,columnHeaderDataLayer));

排序也适用于具有双标题的表格。但是，奇怪的是，如果没有这个 CustomColumnPropertyAccessor，它就无法工作，如示例中所示。也许是因为我不使用网格。