Allow multiple data change handlers in client-side data sources

This patch moves Registration to shared so it can be used in
both client and server

Change-Id: I16757f70beb474403903bbcf92c7f850aed68b88

1 files changed, 33 insertions, 0 deletions

diff --git a/shared/src/main/java/com/vaadin/shared/Registration.java b/shared/src/main/java/com/vaadin/shared/Registration.java
new file mode 100644
index 0000000000..47d3ded8d9
--- /dev/null
+++ b/shared/src/main/java/com/vaadin/shared/Registration.java
@@ -0,0 +1,33 @@
+/*
+ * 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.shared;
+
+import java.io.Serializable;
+
+/**
+ * A registration object for removing an event listener added to a source.
+ *
+ * @author Vaadin Ltd.
+ * @since
+ */
+@FunctionalInterface
+public interface Registration extends Serializable {
+
+    /**
+     * Removes the associated listener from the event source.
+     */
+    public void remove();
+}