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copied!<p>Java enums can't be handled by JSNI, but you can pass enum strings to the JSNI layer, as well as convert strings returned from JSNI methods back to enums. </p> <p>You'd also be better off representing the <code>Giant</code> JavaScript object separately, and delegate to the JSNI layer from the <code>Giant</code> Java type. That way you can maintain separation of concerns and loosely couple the implementation and the abstraction:</p> <pre class="lang-java prettyprint-override"><code>public class GiantJso extends JavaScriptObject { protected GiantJso() { } public static final native GiantJso create(String wordA, String wordB, String wordC) /*-{ return { vocabulary : [ wordA, wordB, wordC ], said : '' }; }-*/; public final native void sayGiantWord(String word) /*-{ if (this.vocabulary.indexOf(word) != -1) { console.log("i'm a giant, here me roar: ", word, "!"); this.said = word; } }-*/; public final native JsArrayString vocabulary() /*-{ return this.vocabulary || null; }-*/; public final native String said() /*-{ return this.said; }-*/; } </code></pre> <p>Then wrap that in the Java type:</p> <pre class="lang-java prettyprint-override"><code>public class Giant { private GiantJso jso; public Giant() { jso = GiantJso.create(GiantWord.FEE.name(), GiantWord.FEE.name(), GiantWord.FEE.name()); } public void sayGiantWord(GiantWord word) { jso.sayGiantWord(word.name()); } public GiantWord getSaidWord() { return GiantWord.valueOf(jso.said()); } } </code></pre> <p><code>vocabulary</code> and <code>said</code> are just examples of additional properties that can be assigned to the JSO, you're free to implement any structure you wish, of course.</p> <h3>Further reading</h3> <ul> <li><em><a href="http://code.google.com/webtoolkit/doc/latest/DevGuideCodingBasicsOverlay.html" rel="nofollow">JSNI overlay types</a></em> on the GWT docs dev guide.</li> </ul> <p><em><strong>Note:</strong> If what you're going for is representing Java classes as JavaScript constructs, check out <a href="http://code.google.com/p/gwt-exporter/" rel="nofollow">GWT exporter</a>.</em></p>

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