diff options
Diffstat (limited to 'server/src/com/vaadin/ui/Grid.java')
| -rw-r--r-- | server/src/com/vaadin/ui/Grid.java | 147 |
1 files changed, 141 insertions, 6 deletions
diff --git a/server/src/com/vaadin/ui/Grid.java b/server/src/com/vaadin/ui/Grid.java index f7d49e6419..af89064411 100644 --- a/server/src/com/vaadin/ui/Grid.java +++ b/server/src/com/vaadin/ui/Grid.java @@ -31,6 +31,7 @@ import java.util.LinkedHashMap; import java.util.LinkedHashSet; import java.util.LinkedList; import java.util.List; +import java.util.Locale; import java.util.Map; import java.util.Map.Entry; import java.util.Set; @@ -52,6 +53,7 @@ import com.vaadin.data.Container.PropertySetChangeEvent; import com.vaadin.data.Container.PropertySetChangeListener; import com.vaadin.data.Container.PropertySetChangeNotifier; import com.vaadin.data.Container.Sortable; +import com.vaadin.data.DataGenerator; import com.vaadin.data.Item; import com.vaadin.data.Property; import com.vaadin.data.RpcDataProviderExtension; @@ -1548,6 +1550,60 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, } /** + * Class for generating all row and cell related data for the essential + * parts of Grid. + */ + private class RowDataGenerator implements DataGenerator { + + @Override + public void generateData(Object itemId, Item item, JsonObject rowData) { + RowReference r = new RowReference(Grid.this); + r.set(itemId); + + if (rowStyleGenerator != null) { + String style = rowStyleGenerator.getStyle(r); + if (style != null && !style.isEmpty()) { + rowData.put(GridState.JSONKEY_ROWSTYLE, style); + } + } + + JsonObject cellStyles = Json.createObject(); + JsonObject cellData = Json.createObject(); + for (Column column : getColumns()) { + Object propertyId = column.getPropertyId(); + String columnId = columnKeys.key(propertyId); + + cellData.put(columnId, getRendererData(column, item)); + + if (cellStyleGenerator != null) { + CellReference c = new CellReference(r); + c.set(propertyId); + + String style = cellStyleGenerator.getStyle(c); + if (style != null && !style.isEmpty()) { + cellStyles.put(columnId, style); + } + } + } + + if (cellStyleGenerator != null && cellStyles.keys().length > 0) { + rowData.put(GridState.JSONKEY_CELLSTYLES, cellStyles); + } + rowData.put(GridState.JSONKEY_DATA, cellData); + } + + private JsonValue getRendererData(Column column, Item item) { + Converter<?, ?> converter = column.getConverter(); + Object propertyId = column.getPropertyId(); + Object modelValue = item.getItemProperty(propertyId).getValue(); + Renderer<?> renderer = column.getRenderer(); + + return AbstractRenderer.encodeValue(modelValue, renderer, + converter, getLocale()); + } + } + + /** * Abstract base class for Grid header and footer sections. * * @param <ROWTYPE> @@ -3462,10 +3518,67 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, return JsonCodec.encode(value, null, type, getUI().getConnectorTracker()).getEncodedValue(); } + + /** + * Converts and encodes the given data model property value using the + * given converter and renderer. This method is public only for testing + * purposes. + * + * @param renderer + * the renderer to use + * @param converter + * the converter to use + * @param modelValue + * the value to convert and encode + * @param locale + * the locale to use in conversion + * @return an encoded value ready to be sent to the client + */ + public static <T> JsonValue encodeValue(Object modelValue, + Renderer<T> renderer, Converter<?, ?> converter, Locale locale) { + Class<T> presentationType = renderer.getPresentationType(); + T presentationValue; + + if (converter == null) { + try { + presentationValue = presentationType.cast(modelValue); + } catch (ClassCastException e) { + if (presentationType == String.class) { + // If there is no converter, just fallback to using + // toString(). modelValue can't be null as + // Class.cast(null) will always succeed + presentationValue = (T) modelValue.toString(); + } else { + throw new Converter.ConversionException( + "Unable to convert value of type " + + modelValue.getClass().getName() + + " to presentation type " + + presentationType.getName() + + ". No converter is set and the types are not compatible."); + } + } + } else { + assert presentationType.isAssignableFrom(converter + .getPresentationType()); + @SuppressWarnings("unchecked") + Converter<T, Object> safeConverter = (Converter<T, Object>) converter; + presentationValue = safeConverter + .convertToPresentation(modelValue, + safeConverter.getPresentationType(), locale); + } + + JsonValue encodedValue = renderer.encode(presentationValue); + + return encodedValue; + } } /** * An abstract base class for server-side Grid extensions. + * <p> + * Note: If the extension is an instance of {@link DataGenerator} it will + * automatically register itself to {@link RpcDataProviderExtension} of + * extended Grid. On remove this registration is automatically removed. * * @since 7.5 */ @@ -3490,6 +3603,26 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, extend(grid); } + @Override + protected void extend(AbstractClientConnector target) { + super.extend(target); + + if (this instanceof DataGenerator) { + getParentGrid().datasourceExtension + .addDataGenerator((DataGenerator) this); + } + } + + @Override + public void remove() { + if (this instanceof DataGenerator) { + getParentGrid().datasourceExtension + .removeDataGenerator((DataGenerator) this); + } + + super.remove(); + } + /** * Gets the item id for a row key. * <p> @@ -3531,9 +3664,14 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, if (getParent() instanceof Grid) { Grid grid = (Grid) getParent(); return grid; + } else if (getParent() == null) { + throw new IllegalStateException( + "Renderer is not attached to any parent"); } else { throw new IllegalStateException( - "Renderers can be used only with Grid"); + "Renderers can be used only with Grid. Extended " + + getParent().getClass().getSimpleName() + + " instead"); } } } @@ -4153,7 +4291,8 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, } datasourceExtension = new RpcDataProviderExtension(container); - datasourceExtension.extend(this, columnKeys); + datasourceExtension.extend(this); + datasourceExtension.addDataGenerator(new RowDataGenerator()); detailComponentManager = datasourceExtension .getDetailComponentManager(); @@ -5620,8 +5759,6 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, */ public void setCellStyleGenerator(CellStyleGenerator cellStyleGenerator) { this.cellStyleGenerator = cellStyleGenerator; - getState().hasCellStyleGenerator = (cellStyleGenerator != null); - datasourceExtension.refreshCache(); } @@ -5644,8 +5781,6 @@ public class Grid extends AbstractFocusable implements SelectionNotifier, */ public void setRowStyleGenerator(RowStyleGenerator rowStyleGenerator) { this.rowStyleGenerator = rowStyleGenerator; - getState().hasRowStyleGenerator = (rowStyleGenerator != null); - datasourceExtension.refreshCache(); } |