gaeasync twitter4j implementation sample

gistfile1.java

class GAEAsyncTwitterImpl extends TwitterBaseImpl
        implements Twitter {
    public QueryResult search(Query query) throws TwitterException {
        try {
            return LazyEntityFactory.newQueryResult(
            		get(conf.getSearchBaseURL() + "search.json", query.asHttpParameterArray())
                    , conf);
        } catch (TwitterException te) {
            if (404 == te.getStatusCode()) {
                return new QueryResultJSONImpl(query);
            } else {
                throw te;
            }
        }
    }
}

public class LazyEntityFactory{
	public static QueryResult newQueryResult(HttpResponse response, Configuration conf)
	throws TwitterException{
		return create(response, conf, QueryResult.class, QueryResultJSONImpl.class);
	}

	private static <T> T create(
			HttpResponse response, Configuration conf
			, Class<T> modelClass, Class<? extends T> implClass)
	throws TwitterException{
		try {
			return (T)Proxy.newProxyInstance(
					Thread.currentThread().getContextClassLoader()
					, new Class<?>[]{modelClass}
					, new LazySimpleModelInvocationHandler<T>(response, conf, implClass)
					);
		} catch (IllegalArgumentException e) {
			throw new TwitterException(e);
		} catch (SecurityException e) {
			throw new TwitterException(e);
		} catch (NoSuchMethodException e) {
			throw new TwitterException(e);
		}
	}
}

public class LazySimpleModelInvocationHandler<T> extends LazyInstanceInvocationHandler<T>{
	public LazySimpleModelInvocationHandler(
			HttpResponse response, Configuration conf, Class<? extends T> implClass)
	throws SecurityException, NoSuchMethodException{
		this.response = response;
		this.implCtor = implClass.getDeclaredConstructor(
				HttpResponse.class, Configuration.class);
		this.implCtor.setAccessible(true);
	}

	@Override
	protected T resolve() throws Throwable {
		return (T)implCtor.newInstance(response, conf);
	}

	private HttpResponse response;
	private Configuration conf;
	private Constructor<? extends T> implCtor;
}