Column controller typing

Former-commit-id: d10b5488

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/controls/IColumnTextProvider.java

+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2018 Serge Rider (serge@jkiss.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jkiss.dbeaver.ui.controls;
+
+/**
+ * IColumnTextProvider
+ */
+public interface IColumnTextProvider<ELEMENT>
+{
+    String getText(ELEMENT element);
+}
\ No newline at end of file

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/controls/ViewerColumnController.java

@@ -46,7 +46,7 @@ import java.util.List;
 /**
  * Tree/table viewer column controller
  */
-public class ViewerColumnController {
+public class ViewerColumnController<ELEMENT> {
 
     private static final Log log = Log.getLog(ViewerColumnController.class);
 
@@ -73,9 +73,7 @@ public class ViewerColumnController {
         control.setData(DATA_KEY, this);
 
         if (control instanceof Tree || control instanceof Table) {
-            menuListener = new Listener() {
-                @Override
-                public void handleEvent(Event event) {
+            menuListener = event -> {
                 Point pt = control.getDisplay().map(null, control, new Point(event.x, event.y));
                 Rectangle clientArea = ((Composite) control).getClientArea();
                 if (RuntimeUtils.isPlatformMacOS()) {
@@ -87,7 +85,6 @@ public class ViewerColumnController {
                         clickOnHeader = clientArea.y <= pt.y && pt.y < (clientArea.y + ((Table) control).getHeaderHeight());
                     }
                 }
-                }
             };
             control.addListener(SWT.MenuDetect, menuListener);
         }
@@ -120,6 +117,16 @@ public class ViewerColumnController {
         });
     }
 
+    public void addColumn(String name, String description, int style, boolean defaultVisible, boolean required, IColumnTextProvider<ELEMENT> labelProvider)
+    {
+        addColumn(name, description, style, defaultVisible, required, false, null, new CellLabelProvider() {
+            @Override
+            public void update(ViewerCell cell) {
+                cell.setText(labelProvider.getText((ELEMENT) cell.getElement()));
+            }
+        }, null);
+    }
+
     public void addColumn(String name, String description, int style, boolean defaultVisible, boolean required, CellLabelProvider labelProvider)
     {
         addColumn(name, description, style, defaultVisible, required, false, null, labelProvider, null);
@@ -317,13 +324,12 @@ public class ViewerColumnController {
             if (columnInfo.labelProvider instanceof ILazyLabelProvider) {
                 hasLazyColumns = true;
             } else if (columnInfo.labelProvider instanceof ILabelProvider) {
-                columnInfo.sortListener = new SortListener(columnInfo);
+                columnInfo.sortListener = new SortListener(viewer, columnInfo);
                 columnInfo.column.addListener(SWT.Selection, columnInfo.sortListener);
             }
         }
         if (hasLazyColumns) {
-            viewer.getControl().addListener(SWT.PaintItem, new Listener() {
-                public void handleEvent(Event event) {
+            viewer.getControl().addListener(SWT.PaintItem, event -> {
                 if (viewer instanceof TreeViewer) {
                     TreeColumn column = ((TreeViewer) viewer).getTree().getColumn(event.index);
                     if (((ColumnInfo) column.getData()).labelProvider instanceof ILazyLabelProvider &&
@@ -343,7 +349,6 @@ public class ViewerColumnController {
                         }
                     }
                 }
-                }
             });
         }
 
@@ -357,7 +362,7 @@ public class ViewerColumnController {
                 visibleList.add(column);
             }
         }
-        Collections.sort(visibleList, new ColumnInfoComparator());
+        visibleList.sort(new ColumnInfoComparator());
         return visibleList;
     }
 
@@ -504,19 +509,17 @@ public class ViewerColumnController {
             UIUtils.createControlLabel(composite, "Select columns you want to display");
 
             List<ColumnInfo> orderedList = new ArrayList<>(columns);
-            Collections.sort(orderedList, new ColumnInfoComparator());
+            orderedList.sort(new ColumnInfoComparator());
             colTable = new Table(composite, SWT.BORDER | SWT.CHECK | SWT.H_SCROLL | SWT.V_SCROLL);
             colTable.setLayoutData(new GridData(GridData.FILL_BOTH));
             colTable.setLinesVisible(true);
-            colTable.addListener(SWT.Selection,new Listener() {
-                public void handleEvent(Event event) {
+            colTable.addListener(SWT.Selection, event -> {
                 if( event.detail == SWT.CHECK ) {
                     if (((TableItem)event.item).getGrayed()) {
                         ((TableItem)event.item).setChecked(true);
                         event.doit = false;
                     }
                 }
-                }
             });
             final TableColumn nameColumn = new TableColumn(colTable, SWT.LEFT);
             nameColumn.setText("Name");
@@ -594,13 +597,15 @@ public class ViewerColumnController {
         }
     }
 
-    private class SortListener implements Listener
+    private static class SortListener implements Listener
     {
+        ColumnViewer viewer;
         ColumnInfo columnInfo;
         int sortDirection = SWT.DOWN;
         Item prevColumn = null;
 
-        public SortListener(ColumnInfo columnInfo) {
+        public SortListener(ColumnViewer viewer, ColumnInfo columnInfo) {
+            this.viewer = viewer;
             this.columnInfo = columnInfo;
         }