From 3b0ed7a67553ca48e40f9c78da5655256a1fe5ea Mon Sep 17 00:00:00 2001
From: Denis Anisimov <denis@vaadin.com>
Date: Sun, 24 Aug 2014 14:48:03 +0300
Subject: Update selection after changes in underlying data source (#13580).

Change-Id: I6354d85bd6bc37b1cbb69f388559278d5a163256
---
 server/src/com/vaadin/ui/AbstractSelect.java       | 19 +++++
 .../TestAbstractSelectValueUpdate.java             | 81 ++++++++++++++++++++++
 2 files changed, 100 insertions(+)
 create mode 100644 server/tests/src/com/vaadin/tests/server/component/abstractselect/TestAbstractSelectValueUpdate.java

(limited to 'server')

diff --git a/server/src/com/vaadin/ui/AbstractSelect.java b/server/src/com/vaadin/ui/AbstractSelect.java
index b083db3183..2c4dd5be5d 100644
--- a/server/src/com/vaadin/ui/AbstractSelect.java
+++ b/server/src/com/vaadin/ui/AbstractSelect.java
@@ -1675,6 +1675,8 @@ public abstract class AbstractSelect extends AbstractField<Object> implements
         // Clears the item id mapping table
         itemIdMapper.removeAll();
 
+        adjustSelection();
+
         // Notify all listeners
         fireItemSetChange();
     }
@@ -1712,6 +1714,23 @@ public abstract class AbstractSelect extends AbstractField<Object> implements
         markAsDirty();
     }
 
+    /**
+     * Removes orphaned ids from selection.
+     */
+    protected void adjustSelection() {
+        Object value = getValue();
+        if (isMultiSelect() && (value instanceof Collection)) {
+            Collection<?> collection = (Collection<?>) value;
+            for (Object id : collection) {
+                if (!containsId(id)) {
+                    unselect(id);
+                }
+            }
+        } else if (!containsId(value)) {
+            unselect(value);
+        }
+    }
+
     /**
      * Implementation of item set change event.
      */
diff --git a/server/tests/src/com/vaadin/tests/server/component/abstractselect/TestAbstractSelectValueUpdate.java b/server/tests/src/com/vaadin/tests/server/component/abstractselect/TestAbstractSelectValueUpdate.java
new file mode 100644
index 0000000000..e81f6e09b6
--- /dev/null
+++ b/server/tests/src/com/vaadin/tests/server/component/abstractselect/TestAbstractSelectValueUpdate.java
@@ -0,0 +1,81 @@
+/*
+ * 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.server.component.abstractselect;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.vaadin.data.util.BeanItemContainer;
+import com.vaadin.ui.AbstractSelect;
+
+public class TestAbstractSelectValueUpdate {
+
+    @Test
+    public void removeItem_deleteItemFromUnderlyingContainer_selectValueIsUpdated() {
+        BeanItemContainer<Object> container = new BeanItemContainer<Object>(
+                Object.class);
+        Object item1 = new Object();
+        Object item2 = new Object();
+        container.addBean(item1);
+        container.addBean(item2);
+        TestSelect select = new TestSelect();
+        select.setContainerDataSource(container);
+
+        select.setValue(item1);
+
+        Assert.assertNotNull("Value is null after selection", select.getValue());
+
+        container.removeItem(item1);
+
+        Assert.assertNull("Value is not null after removal", select.getValue());
+    }
+
+    @Test
+    public void removeItem_multiselectSectionDeleteItemFromUnderlyingContainer_selectValueIsUpdated() {
+        BeanItemContainer<Object> container = new BeanItemContainer<Object>(
+                Object.class);
+        Object item1 = new Object();
+        Object item2 = new Object();
+        container.addBean(item1);
+        container.addBean(item2);
+        TestSelect select = new TestSelect();
+        select.setMultiSelect(true);
+        select.setContainerDataSource(container);
+
+        select.setValue(Collections.singletonList(item1));
+
+        checkSelectedItemsCount(select, 1);
+
+        container.removeItem(item1);
+
+        checkSelectedItemsCount(select, 0);
+    }
+
+    private void checkSelectedItemsCount(TestSelect select, int count) {
+        Assert.assertNotNull("Selected value is null", select.getValue());
+        Assert.assertTrue("Selected value is not a collection",
+                select.getValue() instanceof Collection);
+        Assert.assertEquals("Wrong number of selected items",
+                ((Collection<?>) select.getValue()).size(), count);
+    }
+
+    private class TestSelect extends AbstractSelect {
+
+    }
+}
-- 
cgit v1.2.3