Question

I cant understand this API. I have downloaded (maven) google-api-services-freebase and to test I have tried to do this code:

 JsonHttpRequestInitializer initializer = 
        new GoogleKeyInitializer("MY KEY");
                                 HttpTransport httpTransport = new NetHttpTransport();
                                 JsonFactory jsonFactory = new JacksonFactory();

 Freebase freebase = 
          Freebase.builder(httpTransport,   
          jsonFactory).setJsonHttpRequestInitializer(initializer).build();

Now i want to do this:

https://www.googleapis.com/freebase/v1/search?query=cardiff&lang=en&type=university

And next, I want to parse the json output.

Please, where is the method to this in freebase object?. I see freebase.mqlread and freebase.text but i cant find any method similar for API SEARCH (http://wiki.freebase.com/wiki/ApiSearch).

Answer 1

Unfortunately, the Java API Client doesn’t support Freebase Search yet. Here’s how to do a search using Apache HttpClient instead.

HttpClient httpclient = new DefaultHttpClient();
JSONParser parser = new JSONParser();

List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("query", "Blue Bottle"));
params.add(new BasicNameValuePair("key", API_KEY));

String serviceURL = "https://www.googleapis.com/freebase/v1/search";
String url = serviceURL + "?" + URLEncodedUtils.format(params, "UTF-8");      
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
JSONObject response = (JSONObject)parser.parse(EntityUtils.toString(httpResponse.getEntity()));
JSONArray results = (JSONArray)response.get("result");

for (Object result : results) {
  System.out.println(JsonPath.read(result,"$.name").toString());
}

This code also uses the json-simple and json-path libraries.