Added SharedUtil for helpers shared by client and server

Change-Id: Ie289e8eefd962631a43f35dbb47fa192fcf60abf

1 files changed, 45 insertions, 0 deletions

diff --git a/shared/src/com/vaadin/shared/util/SharedUtil.java b/shared/src/com/vaadin/shared/util/SharedUtil.java
new file mode 100644
index 0000000000..2242fa4363
--- /dev/null
+++ b/shared/src/com/vaadin/shared/util/SharedUtil.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2000-2013 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.util;
+
+/**
+ * Misc internal utility methods used by both the server and the client package.
+ * 
+ * @author Vaadin Ltd
+ * @since 7.1
+ * 
+ */
+public class SharedUtil {
+    /**
+     * Checks if a and b are equals using {@link #equals(Object)}. Handles null
+     * values as well. Does not ensure that objects are of the same type.
+     * Assumes that the first object's equals method handle equals properly.
+     * 
+     * @param o1
+     *            The first value to compare
+     * @param o2
+     *            The second value to compare
+     * @return true if the objects are equal, false otherwise
+     */
+    public static boolean equals(Object o1, Object o2) {
+        if (o1 == null) {
+            return o2 == null;
+        }
+
+        return o1.equals(o2);
+    }
+
+}