Make Invoker support non-public methods (#12959)

Change-Id: Ie449489f3c9222bbe4a4221841c4ebc20693f969

1 files changed, 53 insertions, 0 deletions

diff --git a/client/src/com/vaadin/client/metadata/JsniInvoker.java b/client/src/com/vaadin/client/metadata/JsniInvoker.java
new file mode 100644
index 0000000000..4692a18cfe
--- /dev/null
+++ b/client/src/com/vaadin/client/metadata/JsniInvoker.java
@@ -0,0 +1,53 @@
+/*
+ * 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.client.metadata;
+
+import com.google.gwt.core.client.JavaScriptObject;
+import com.vaadin.client.JsArrayObject;
+
+/**
+ * Special {@link Invoker} that uses JSNI to invoke methods with limited
+ * visibility.
+ * 
+ * @since 7.2
+ * @author Vaadin Ltd
+ */
+public abstract class JsniInvoker implements Invoker {
+
+    @Override
+    public Object invoke(Object target, Object... params) {
+        JsArrayObject<Object> jsParams = JavaScriptObject.createArray().cast();
+        for (Object object : params) {
+            jsParams.add(object);
+        }
+        return jsniInvoke(target, jsParams);
+    }
+
+    /**
+     * Abstract method that will be generated to contain JSNI for invoking the
+     * actual method.
+     * 
+     * @param target
+     *            the object upon which to invoke the method
+     * @param params
+     *            a js array with arguments to pass to the method
+     * @return the value returned by the invoked method, or <code>null</code> if
+     *         the target method return type is <code>void</code>.
+     */
+    protected abstract Object jsniInvoke(Object target,
+            JsArrayObject<Object> params);
+
+}