1 files changed, 66 insertions, 0 deletions
diff --git a/server/src/main/java/com/vaadin/ui/AbstractMultiSelect.java b/server/src/main/java/com/vaadin/ui/AbstractMultiSelect.java
new file mode 100644
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+++ b/server/src/main/java/com/vaadin/ui/AbstractMultiSelect.java
@@ -0,0 +1,66 @@
+/*
+ * 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.ui;
+
+import java.lang.reflect.Method;
+import java.util.Objects;
+
+import com.vaadin.event.selection.MultiSelectionEvent;
+import com.vaadin.event.selection.MultiSelectionListener;
+import com.vaadin.shared.Registration;
+import com.vaadin.shared.data.selection.SelectionModel.Multi;
+import com.vaadin.util.ReflectTools;
+
+/**
+ * Base class for listing components that allow selecting multiple items.
+ *
+ * @param <T>
+ *            item type
+ * @author Vaadin Ltd
+ * @since 8.0
+ */
+public abstract class AbstractMultiSelect<T>
+        extends AbstractListing<T, Multi<T>> {
+
+    @Deprecated
+    private static final Method SELECTION_CHANGE_METHOD = ReflectTools
+            .findMethod(MultiSelectionListener.class, "accept",
+                    MultiSelectionEvent.class);
+
+    /**
+     * Creates a new multi select with an empty data source.
+     */
+    protected AbstractMultiSelect() {
+        super();
+    }
+
+    /**
+     * Adds a selection listener that will be called when the selection is
+     * changed either by the user or programmatically.
+     *
+     * @param listener
+     *            the value change listener, not <code>null</code>
+     * @return a registration for the listener
+     */
+    public Registration addSelectionListener(
+            MultiSelectionListener<T> listener) {
+        Objects.requireNonNull(listener, "listener cannot be null");
+        addListener(MultiSelectionEvent.class, listener,
+                SELECTION_CHANGE_METHOD);
+        return () -> removeListener(MultiSelectionEvent.class, listener);
+    }
+
+}
+\ No newline at end of file