Retcat_BGSLinkedData Class Reference

Static Public Member Functions
static Map< String, SuggestionItem >	query (String searchword)
static JSONObject	info (String url) throws MalformedURLException, IOException, ParseException, ParseException, RepositoryException, MalformedQueryException, QueryEvaluationException, SesameSparqlException, ResourceNotAvailableException, RetcatException

Member Function Documentation

info()

static JSONObject info ( String  url ) throws MalformedURLException, IOException, ParseException, ParseException, RepositoryException, MalformedQueryException, QueryEvaluationException, SesameSparqlException, ResourceNotAvailableException, RetcatException

static

                                                                                                                                                                                                                                                                           {
                try {
                        String dataURL = url.replace("/id/", "/doc/");
                        dataURL += ".JSON";
                        URL obj = new URL(dataURL);
                        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
                        con.setRequestMethod("GET");
                        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF8"));
                        String inputLine;
                        StringBuilder response = new StringBuilder();
                        while ((inputLine = in.readLine()) != null) {
                                response.append(inputLine);
                        }
                        in.close();
                        // parse json
                        JSONObject jsonOut = new JSONObject();
                        JSONObject jsonObject = (JSONObject) new JSONParser().parse(response.toString());
                        // output
                        JSONObject conceptObject = (JSONObject) jsonObject.get(url);
                        JSONArray prefLabel = (JSONArray) conceptObject.get("http://www.w3.org/2000/01/rdf-schema#label");
                        JSONObject prefLabelObj = (JSONObject) prefLabel.get(0);
                        jsonOut.put("label", prefLabelObj.get("value"));
                        jsonOut.put("lang", prefLabelObj.get("lang"));
                        JSONArray definition = (JSONArray) conceptObject.get("http://www.w3.org/2004/02/skos/core#definition");
                        if (definition != null) {
                                JSONObject definitionObj = (JSONObject) definition.get(0);
                                jsonOut.put("description", definitionObj.get("value"));
                        }
                        JSONArray scheme = (JSONArray) conceptObject.get("http://www.w3.org/2004/02/skos/core#inScheme");
                        if (scheme != null) {
                                JSONObject schemeObj = (JSONObject) scheme.get(0);
                                String schemeValue = (String) schemeObj.get("value");
                                String[] schemeSplit = schemeValue.split("/");
                                jsonOut.put("scheme", schemeSplit[schemeSplit.length - 1]);
                        } else {
                                jsonOut.put("scheme", "BGS Linked Data");
                        }
                        jsonOut.put("uri", url);
                        // get retcat info
                        String type = "bgs";
                        String quality = "";
                        String group = "";
                        for (RetcatItem item : LocalRetcatItems.getLocalCatalogue()) {
                                if (item.getType().equals(type)) {
                                        quality = item.getQuality();
                                        group = item.getGroup();
                                }
                        }
                        jsonOut.put("type", type);
                        jsonOut.put("quality", quality);
                        jsonOut.put("group", group);
                        // broader and narrower (not yet available)
                        jsonOut.put("broaderTerms", new JSONArray());
                        jsonOut.put("narrowerTerms", new JSONArray());
                        if (jsonOut.get("label") != null && !jsonOut.get("label").equals("")) {
                                return jsonOut;
                        } else {
                                throw new RetcatException("no label for this uri available");
                        }
                } catch (Exception e) {
                        return new JSONObject();
                }
        }

References LocalRetcatItems.getLocalCatalogue().

Referenced by RetcatResource.getInfoBGS(), and RetcatResource.getQueryResultsBGS().

query()

static Map<String, SuggestionItem> query ( String  searchword )

static

                                                                           {
                // no query API available, return empty object, use info with uri prefix
                return new HashMap<>();
        }

Referenced by RetcatResource.getQueryResultsBGS().