Make HierarchyRendererCellReferenceWrapper a nested class of HierarchyRenderer

client/src/main/java/com/vaadin/client/renderers/HierarchyRenderer.java

@@ -19,6 +19,7 @@ import java.util.function.BiConsumer;
 
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.dom.client.Element;
+import com.google.gwt.dom.client.TableCellElement;
 import com.google.gwt.event.dom.client.ClickEvent;
 import com.google.gwt.event.dom.client.ClickHandler;
 import com.google.gwt.event.dom.client.HasClickHandlers;
@@ -30,8 +31,9 @@ import com.google.gwt.user.client.ui.HTML;
 import com.google.gwt.user.client.ui.Widget;
 import com.vaadin.client.WidgetUtil;
 import com.vaadin.client.connectors.treegrid.TreeGridConnector;
+import com.vaadin.client.widget.escalator.FlyweightCell;
 import com.vaadin.client.widget.grid.RendererCellReference;
-import com.vaadin.client.widget.treegrid.HierarchyRendererCellReferenceWrapper;
+import com.vaadin.client.widget.grid.RowReference;
 import com.vaadin.shared.ui.treegrid.HierarchicalDataCommunicatorConstants;
 
 import elemental.json.JsonObject;
@@ -44,6 +46,42 @@ import elemental.json.JsonObject;
  */
 public class HierarchyRenderer extends ClickableRenderer<Object, Widget> {
 
+    /**
+     * Wrapper for cell references. Used to get the correct inner element to
+     * render.
+     *
+     * @author Vaadin Ltd
+     * @since 8.1
+     */
+    private static class HierarchyRendererCellReferenceWrapper
+            extends RendererCellReference {
+
+        private Element element;
+
+        public HierarchyRendererCellReferenceWrapper(RendererCellReference cell,
+                Element element) {
+            super(getRowReference(cell));
+            set(getFlyweightCell(cell), cell.getColumnIndex(),
+                    cell.getColumn());
+            this.element = element;
+        }
+
+        @Override
+        public TableCellElement getElement() {
+            return (TableCellElement) element;
+        }
+
+        private native static RowReference<Object> getRowReference(
+                RendererCellReference cell) /*-{
+            return cell.@com.vaadin.client.widget.grid.CellReference::getRowReference()();
+        }-*/;
+
+        private native static FlyweightCell getFlyweightCell(
+                RendererCellReference cell) /*-{
+            return cell.@com.vaadin.client.widget.grid.RendererCellReference::cell;
+        }-*/;
+    }
+
     private String nodeStyleName;
     private String expanderStyleName;
     private String cellContentStyleName;

client/src/main/java/com/vaadin/client/widget/treegrid/HierarchyRendererCellReferenceWrapper.java

@@ -1,59 +0,0 @@
-/*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * 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 com.vaadin.client.widget.treegrid;
-
-import com.google.gwt.dom.client.Element;
-import com.google.gwt.dom.client.TableCellElement;
-import com.vaadin.client.widget.escalator.FlyweightCell;
-import com.vaadin.client.widget.grid.RendererCellReference;
-import com.vaadin.client.widget.grid.RowReference;
-
-/**
- * Wrapper for cell references. Used by HierarchyRenderer to get the correct
- * inner element to render.
- *
- * @author Vaadin Ltd
- * @since 8.1
- */
-public class HierarchyRendererCellReferenceWrapper
-        extends RendererCellReference {
-
-    private Element element;
-
-    public HierarchyRendererCellReferenceWrapper(RendererCellReference cell,
-            Element element) {
-        super(getRowReference(cell));
-        set(getFlyweightCell(cell), cell.getColumnIndex(), cell.getColumn());
-        this.element = element;
-    }
-
-    @Override
-    public TableCellElement getElement() {
-        return (TableCellElement) element;
-    }
-
-    private native static RowReference<Object> getRowReference(
-            RendererCellReference cell)
-    /*-{
-    return cell.@com.vaadin.client.widget.grid.CellReference::getRowReference()();
-    }-*/;
-
-    private native static FlyweightCell getFlyweightCell(
-            RendererCellReference cell)
-    /*-{
-    return cell.@com.vaadin.client.widget.grid.RendererCellReference::cell;
-    }-*/;
-}