Java tutorial
/** * This software is released under the University of Illinois/Research and Academic Use License. See * the LICENSE file in the root folder for details. Copyright (c) 2016 * * Developed by: The Cognitive Computation Group University of Illinois at Urbana-Champaign * http://cogcomp.cs.illinois.edu/ */ package edu.illinois.cs.cogcomp.wikifier.utils.freebase; import com.google.common.collect.Lists; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; import edu.illinois.cs.cogcomp.core.io.IOUtils; import edu.illinois.cs.cogcomp.core.io.LineIO; import org.apache.commons.io.FileUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.net.URLEncoder; import java.util.ArrayList; import java.util.List; import static java.util.stream.Collectors.joining; import static java.util.stream.Collectors.toList; /** * Takes a string (e.g., "obama") and asks the Freebase Search API. Caches if * necessary. Outputs a set of entities. * * @author Percy Liang * @modified upadhya3 */ public class FreebaseSearch { static int counter = 0; private String apikey; private String cacheLocation; private String rdfCacheLocation; static final String defaultCacheLocation = "/shared/bronte/tac2014/data/freebaseRawResponseCache/SearchResponse"; static final String defaultRdfCacheLocation = "/shared/bronte/tac2014/data/freebaseRawResponseCache/RdfResponse"; static final String defaultApikey = "AIzaSyAclVmmn2FbIc6PiN9poGfNTt2CcyU6x48"; // has // 10k // queries // per // day // limit // (Shyam) // static final String defaultApikey = // "AIzaSyD4X-Y5JK4ONiCrxp_rbyo54VgKFFXcon0"; // has 10k queries per day // limit (Chen-Tse) private static final Logger logger = LoggerFactory.getLogger(FreebaseSearch.class); public FreebaseSearch() { this.apikey = defaultApikey; this.cacheLocation = defaultCacheLocation; this.rdfCacheLocation = defaultRdfCacheLocation; } public FreebaseSearch(String cacheLocation, String key) { this.apikey = key; this.cacheLocation = cacheLocation; } public FreebaseSearch(String cacheLocation) { this(cacheLocation, defaultApikey); } public List<FreebaseAnswer> lookup(String query) throws Exception { // First, try the cache. String checksum = QueryMQL.getMD5Checksum(query); if (IOUtils.exists(cacheLocation + "/" + checksum + ".cached")) { // System.out.println("Found!"); return parseJson( FileUtils.readFileToString(new File(cacheLocation + "/" + checksum + ".cached"), "UTF-8")); } else { System.out.println("Caching"); String tmp = getQueryResponse(query); FileUtils.writeStringToFile(new File(cacheLocation + "/" + checksum + ".cached"), tmp, "UTF-8"); return parseJson(tmp); } } /** * Query Freebase by ID * @param query: in the form of m/09c7w0 * @return * @throws Exception */ public List<String> lookupRdf(String query) { // First, try the cache. String checksum = QueryMQL.getMD5Checksum(query); String filename = rdfCacheLocation + "/" + checksum + ".cached"; if (IOUtils.exists(filename)) { // System.out.println("Found!"); try { return LineIO.read(filename); } catch (FileNotFoundException e) { e.printStackTrace(); } } else { System.out.println("Caching"); List<String> tmp = queryByID(query); try { FileUtils.writeStringToFile(new File(filename), tmp.stream().collect(joining("\n")), "UTF-8"); } catch (IOException e) { e.printStackTrace(); } return tmp; } return null; } private List<FreebaseAnswer> parseJson(String ans) { if (ans == null) return null; List<FreebaseAnswer> output = Lists.newArrayList(); JsonElement parse = new JsonParser().parse(ans); JsonObject asJsonObject = parse.getAsJsonObject(); JsonArray jarray = asJsonObject.getAsJsonArray("result"); for (JsonElement js : jarray) { output.add(new FreebaseAnswer(js)); } return output; } private List<String> queryByID(String query) { counter++; logger.info("NOT IN FREEBASE CACHE, QUERYING ... " + counter + " times"); String url = null; try { url = String.format("https://www.googleapis.com/freebase/v1/rdf/" + query + "?key=" + apikey, URLEncoder.encode(query, "UTF-8")); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } System.out.println("QUERY URL: " + url); URLConnection conn = null; InputStream in; try { conn = new URL(url).openConnection(); in = conn.getInputStream(); } catch (IOException e) { return new ArrayList<>(); } // Read the response BufferedReader reader = new BufferedReader(new InputStreamReader(in)); List<String> ret = new ArrayList<>(); String line; try { while ((line = reader.readLine()) != null) ret.add(line.trim()); reader.close(); } catch (IOException e) { e.printStackTrace(); } return ret; } private String getQueryResponse(String query) throws MalformedURLException, IOException { counter++; logger.info("NOT IN FREEBASE CACHE, QUERYING ... " + counter + " times"); String url = String.format("https://www.googleapis.com/freebase/v1/search?query=%s&key=" + apikey, URLEncoder.encode(query, "UTF-8")); System.out.println("QUERY URL: " + url); URLConnection conn = new URL(url).openConnection(); InputStream in = conn.getInputStream(); // Read the response StringBuilder buf = new StringBuilder(); BufferedReader reader = new BufferedReader(new InputStreamReader(in)); String line; while ((line = reader.readLine()) != null) buf.append(line); reader.close(); // logger.info(buf.toString()); return buf.toString(); } // /en/barack_obama => fb:en.barack_obama, FOR LATER USE private String toRDF(String s) { if (s == null) return s; return "fb:" + s.substring(1).replaceAll("/", "."); } public String[] query(String q) throws IOException { System.out.println("in query:" + q); List<String> ans = new ArrayList<String>(); try { List<FreebaseAnswer> tmp = lookup(q); for (FreebaseAnswer t : tmp) { ans.add(t.getName()); } } catch (Exception e) { e.printStackTrace(); } return ans.toArray(new String[ans.size()]); } public void close() throws IOException { // TODO Auto-generated method stub } public static void main(String[] args) throws Exception { FreebaseSearch fb = new FreebaseSearch(); List<FreebaseAnswer> answers = fb.lookup("Barack_Obama"); String mid = answers.get(0).getMid().substring(1); // Arrays.asList(answers).forEach(x -> System.out.println(x)); // for(FreebaseAnswer term:fb.lookup("Obama")) // { // System.out.println(term.getName()+" "); // } // Map<String, String> map = MapDB // .newDefaultDb("data/freebaseRawResponseCache/", // "freebase_cache").make().getHashMap("freebase_cache"); // System.out.println(map.size()); // int i = 0; // for (String key : map.keySet()) { // // System.out.println(map.get(key)); // fb.lookup(key); // if (i++ % 1000 == 0) { // System.out.println("Done " + i); // } // } // query = "Obomber"; // // query = "Saint Ronnie"; // NO! // query = "Kstewart"; // NO! // query = "Shrub"; ///// // query = "Mufc"; /// // query = "Hogtown"; ///// // query = "Arnie"; // // query = "Owe Bama"; // NO! // query = "Belgie"; // // query = "MAN U"; // // query = "Brittania"; // query = "heels"; // // query = "dprk"; // // query = "CFF"; // NO! // query = "Hayluh Bawbuh"; // NO! // query = "T Dot"; // // query = "Chitown"; // NO! // query = "Rpattz"; /// // query = "Hiltery"; // NO! // query = "Baby Bush"; /// // query = "Mclame"; // NO! // query = "Rob Pattinson"; // query = "Cigar City"; // // query = "Nobama"; // String[] querys = { "Obomber", "MAN U", "Arnie", "heels", "dprk", // "CFF", "Hayluh Bawbuh", "Rob Pattinson", "Cigar City", // "Baby Bush", "Hogtown" }; // 11 queries // FreebaseSearch search = new FreebaseSearch( // "/shared/bronte/tac2014/data/freebaseCache"); // FreebaseSearch search = new FreebaseSearch(); // System.out.println(search.lookup("Popolo Delle Liberta'")); // FreebaseSearch search = new FreebaseSearch("freebase_cache"); // System.out.println(search.cache.size()); // populate(search); // System.out.println(search.cache.size()); // for(String key:search.cache.keySet()) // { // System.out.println(key+" : "+search.cache.get(key)); // System.out.println(search.cache.get(key).size()); // // // System.out.println(remove_duplicates(search.cache.get(key))); // // search.cache.put(key, remove_duplicates(search.cache.get(key))); // // // System.out.println(remove_duplicates(search.cache.get(key)).size()); // } // int c=0; // while(true) // { // try { // search.lookup(query); // } catch (Exception e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } // c++; // System.out.println(c); // } // for (String query : querys) // for (String ans : search.lookup(query)) { // System.out.println(ans); // } } }