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+/*
+ * Copyright 2011 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.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import com.vaadin.terminal.gwt.server.ClientConnector;
+
+/**
+ * If this annotation is present on a {@link ClientConnector} class, the
+ * framework ensures the referenced JavaScript files are loaded before the init
+ * method for the corresponding client-side connector is invoked.
+ * <p>
+ * Absolute URLs including protocol and host are used as is on the client-side.
+ * Relative urls are mapped to APP/CONNECTOR/[url] which are by default served
+ * from the classpath relative to the class where the annotation is defined.
+ * <p>
+ * Example: {@code @JavaScript( "http://host.com/file1.js", "file2.js"})} on the
+ * class com.example.MyConnector would load the file http://host.com/file1.js as
+ * is and file2.js from /com/example/file2.js on the server's classpath using
+ * the ClassLoader that was used to load com.example.MyConnector.
+ *
+ * @author Vaadin Ltd
+ * @since 7.0.0
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface JavaScript {
+ /**
+ * JavaScript files to load before initializing the client-side connector.
+ *
+ * @return an array of JavaScript file urls
+ */
+ public String[] value();
+}