GWT JSNI

FsItem.java

import com.google.gwt.core.client.JavaScriptObject;

public final class FsItem extends JavaScriptObject {
    protected FsItem() {
    }

    public native FsItem init(boolean folder, String absoluteName, String name, int size) /*-{
        this.folder = folder;
        this.absoluteName = absoluteName;
        this.name = name;
        this.size = size;
        return this;
    }-*/;

    public native boolean isFolder() /*-{ return this.folder }-*/;

    public native String getAbsoluteName()/*-{ return this.absoluteName }-*/;

    public native String getName() /*-{ return this.name }-*/;

    public native int getSize()/*-{ return this.size }-*/;
}

JsArray.java

import com.google.gwt.core.client.JavaScriptObject;

public class JsArray<E extends JavaScriptObject> extends JavaScriptObject {
  protected JsArray() { }
  public final native int length() /*-{ return this.length; }-*/;
  public final native E get(int i) /*-{ return this[i];     }-*/;
}

JSNIUtils.java

	private static final native JsArray<FsItem> fsItems(String json) /*-{
		return eval('('+json+')'); //important: wrap the json in ()
	}-*/;

	public static final native FsItem newItem(boolean folder, String absoluteName, String name, int size) /*-{
		return eval('({folder: '+folder+', absoluteName: "'+absoluteName+'", name: "'+name+'", size: '+size+' })');
	}-*/;