Fix RpcDataProvider listener handling on ItemSetChange (#19371)

Old ValueChangeListeners are discarded and new ones created when an
ItemSetChange occurs. This is done to reapply the listeners to possibly
recreated Items.

Change-Id: I9956af8950e241005574c597c49c5efb43afc1c7

server/src/com/vaadin/server/communication/data/RpcDataProviderExtension.java

@@ -137,6 +137,10 @@ public class RpcDataProviderExtension extends AbstractExtension {
         @Override
         public void destroyData(Object itemId) {
             keyMapper.remove(itemId);
+            removeListener(itemId);
+        }
+
+        private void removeListener(Object itemId) {
             GridValueChangeListener removed = activeItemMap.remove(itemId);
 
             if (removed != null) {
@@ -239,6 +243,13 @@ public class RpcDataProviderExtension extends AbstractExtension {
             }
 
             else {
+                // Remove obsolete value change listeners.
+                Set<Object> keySet = new HashSet<Object>(
+                        activeItemHandler.activeItemMap.keySet());
+                for (Object itemId : keySet) {
+                    activeItemHandler.removeListener(itemId);
+                }
+
                 /* Mark as dirty to push changes in beforeClientResponse */
                 bareItemSetTriggeredSizeChange = true;
                 markAsDirty();

uitest/src/com/vaadin/tests/components/grid/GridItemSetChange.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2000-2014 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.tests.components.grid;
+
+import com.vaadin.data.util.BeanItemContainer;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.tests.util.Person;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.Button.ClickEvent;
+import com.vaadin.ui.Button.ClickListener;
+import com.vaadin.ui.Grid;
+
+public class GridItemSetChange extends AbstractTestUI {
+
+    public static class SneakyBeanContainer extends BeanItemContainer<Person> {
+
+        private Person p = new Person("Foo", "Bar", "", "", "", 0, "");
+
+        public SneakyBeanContainer() throws IllegalArgumentException {
+            super(Person.class);
+            addItem(p);
+        }
+
+        public void reset() {
+            internalRemoveAllItems();
+            p.setLastName("Baz");
+            internalAddItemAtEnd(p, createBeanItem(p), false);
+            fireItemSetChange();
+        }
+    }
+
+    @Override
+    protected void setup(VaadinRequest request) {
+        final SneakyBeanContainer c = new SneakyBeanContainer();
+        Grid g = new Grid(c);
+        g.setColumns("firstName", "lastName");
+        addComponent(g);
+        addComponent(new Button("Reset", new ClickListener() {
+
+            @Override
+            public void buttonClick(ClickEvent event) {
+                c.reset();
+            }
+        }));
+        addComponent(new Button("Modify", new ClickListener() {
+
+            @Override
+            public void buttonClick(ClickEvent event) {
+                c.getItem(c.firstItemId()).getItemProperty("lastName")
+                        .setValue("Spam");
+            }
+        }));
+    }
+
+}

uitest/src/com/vaadin/tests/components/grid/GridItemSetChangeTest.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2000-2014 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.tests.components.grid;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.vaadin.testbench.elements.ButtonElement;
+import com.vaadin.testbench.elements.GridElement;
+import com.vaadin.tests.tb3.SingleBrowserTest;
+
+public class GridItemSetChangeTest extends SingleBrowserTest {
+
+    @Test
+    public void testValueChangeListenersWorkAfterItemSetChange() {
+        openTestURL();
+
+        GridElement grid = $(GridElement.class).first();
+        assertEquals("Last name initially wrong", "Bar", grid.getCell(0, 1)
+                .getText());
+
+        $(ButtonElement.class).caption("Modify").first().click();
+        assertEquals("Last name was not updated", "Spam", grid.getCell(0, 1)
+                .getText());
+
+        $(ButtonElement.class).caption("Reset").first().click();
+        assertEquals("Last name was not updated on reset", "Baz",
+                grid.getCell(0, 1).getText());
+
+        $(ButtonElement.class).caption("Modify").first().click();
+        assertEquals("Last name was not updated after reset modification",
+                "Spam", grid.getCell(0, 1).getText());
+    }
+}