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POPossibility to call nonstatic gwt java method from javascript
 

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    <p>General Aim: call some nonstatic java method from javascript</p> <p>Description: To find gwt's widget on DOM in Java Applet code and call it's java method(non static)</p> <pre><code> JSObject win = JSObject.getWindow(this); JSObject doc = (JSObject) win.getMember("document"); JSObject gwtWidget = (JSObject) doc.call("getElementsByName", widgetName); //todo: have possibility to call `exported` java method over here, smth like: //Object[] params = new Object[1]; //params[0] = widgetName; //Object result = gwtWidget.call("exportedJavaMethod", params); //todo: or just call global ($wnd) static JSNI bridge method: //Object result = win.call("exportedJavaMethod", params); // </code></pre> <p>The problem is: I can find by widget's id not the widget, but it's DivElement which does not have any exported instanced methods.</p> <p>My widget class is Exportable (gwt-export):</p> <pre><code> @Export(value="somewidget") public class SomeWidget extends SimplePanel implements ..., Exportable { private final String id = "id_some_widget_" + count++; private static int count = 0; public SomeWidget () { getElement().setAttribute("name", id); getElement().setId(id); } ... public static Element getInstanceById(String elementId) { Element someWidget= DOM.getElementById(elementId); return someWidget; } public String getSomeInstancedData() { return "useful_inner_data" + this.id; } </code></pre> <p>So, for example I'd like to find the concrete widget added to DOM and call nonstatic method <code>getSomeInstancedData()</code> in javascript. Is it possible at all?</p> <p>Suppose smth like:</p> <pre><code> var someWidget = document.getElementById(widgetId); alert(someWidget.getSomeInstancedData()); //or: var someWidgetExported = com.mypackage.widgets.somewidget.getInstanceById(listenerId); alert(someWidgetExported.getSomeInstancedData()); </code></pre> <p>In Base module I write:</p> <pre><code> ExporterUtil.exportAll(); </code></pre> <p>There is a View(ViewWithSomeWidget.ui.xml) that contains this widget:</p> <pre> ... base:Form base:SomeWidget ui:field="someWidget" ... ... /base:SomeWidget ... </pre> <p>When SomeWidget does not implement Exportable, project runs well, but I couldn't call nonstatic methods of found widget's DIV element.</p> <p>By the time, to solve the problem SomeWidget implements Exportable, but progect doesn't show View with the SomeWidget well because of ClassCastException using deferred binding:</p> <pre><code> ClassCastException: com.mypackage.widgets.SomeWidgetExporterImpl cannot be cast to com.mypackage.widgets.SomeWidget </code></pre> <p>So, probably there are any other methods to find widget's javascript object and call it's exported java method? In any ways, any idea is much appreciated. </p>
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