com.asayama.gwt.angular.client.q.HostedModeEnvelope Maven / Gradle / Ivy

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package com.asayama.gwt.angular.client.q;

import com.asayama.gwt.jsni.client.JSArray;
import com.asayama.gwt.jsni.client.JSObject;

/**
 * This JavaScriptObject type was defined to workaround the problem of passing
 * a plain old java object through AngularJS's promise pipeline. When primitive
 * and String objects were passed, the framework worked as expected. However,
 * when a user defined object, such as GWT's Response object, was passed, the
 * promise framework broke with null pointer exception in the code somewhere
 * for Hosted Mode only. (The same exact code worked in Prod Mode, just as 
 * expected.)
 * 
 * https://github.com/kyoken74/gwt-angular/issues/67
 * 
 * 
 * @author kyoken74
 */
class HostedModeEnvelope extends JSObject {

    static 
 HostedModeEnvelope
 wrap(P payload) {
        HostedModeEnvelope
 envelope = JSObject.create();
        envelope.$object("payload", payload);
        return envelope;
    }
    
    @SuppressWarnings("unchecked")
    static 
 P unwrap(Object o) {
        if (o == null) {
            return null;
        }
        HostedModeEnvelope
 envelope = (HostedModeEnvelope
) o;
        P payload = envelope.getPayload();
        if (payload == null) {
            JSArray array = envelope.cast();
            if (array.size() > 0) {
                JSArray