List of usage examples for com.fasterxml.jackson.core JsonGenerator close
@Override public abstract void close() throws IOException;
From source file:com.netflix.spectator.tdigest.TDigestWriter.java
/** * Write a list of measurements to some underlying storage. *//*from w w w. ja v a 2s .c om*/ void write(List<TDigestMeasurement> measurements) throws IOException { JsonGenerator gen = json.newGenerator(out); gen.writeStartArray(); gen.flush(); int pos = buf.position(); for (TDigestMeasurement m : measurements) { json.encode(commonTags, m, gen); gen.flush(); if (out.overflow()) { // Ignore the last entry written to the buffer out.setPosition(pos); gen.writeEndArray(); gen.close(); write(buf); // Reuse the buffer and write the current entry out.reset(); gen = json.newGenerator(out); gen.writeStartArray(); json.encode(commonTags, m, gen); gen.flush(); // If a single entry is too big, then drop it if (out.overflow()) { LOGGER.warn("dropping measurement {}, serialized size exceeds the buffer cap", m.id()); out.reset(); gen = json.newGenerator(out); gen.writeStartArray(); gen.flush(); } pos = buf.position(); } else if (buf.remaining() < MIN_FREE) { // Not enough free-space, go ahead and write gen.writeEndArray(); gen.close(); write(buf); // Reuse the buffer out.reset(); gen = json.newGenerator(out); gen.writeStartArray(); gen.flush(); pos = buf.position(); } else { pos = buf.position(); } } // Write any data that is still in the buffer if (buf.position() > 1) { gen.writeEndArray(); gen.close(); write(buf); } }
From source file:test.com.azaptree.services.json.JsonUtilsTest.java
@Test public void test_serialize() throws JsonGenerationException, IOException { final ByteArrayOutputStream bos = new ByteArrayOutputStream(); final JsonGenerator generator = JsonUtils.createJsonGenerator(bos); generator.writeStartObject();//from ww w. j a va2 s . c o m generator.writeStringField("stringField", "stringFieldValue"); generator.writeNumberField("numberField", 5); generator.writeEndObject(); generator.close(); final Map<String, Object> test = JsonUtils.parse(new ByteArrayInputStream(bos.toByteArray())); Assert.assertEquals(test.get("stringField"), "stringFieldValue"); Assert.assertEquals(test.get("numberField"), 5); }
From source file:javasnack.snacks.json.PojoEncodeJackson.java
@Override public void run() { ObjectMapper objectMapper = new ObjectMapper(); try {//w w w . j a v a 2s .com String jsonout = objectMapper.writeValueAsString(new EncodePojo()); System.out.println("--- simple jackson encode ---"); System.out.println(jsonout); String jsonout2 = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(new EncodePojo()); System.out.println("--- default pretty-print jackson encode ---"); System.out.println(jsonout2); System.out.println("--- streaming jackson encode ---"); JsonFactory jsonFactory = objectMapper.getFactory(); Writer out = new OutputStreamWriter(System.out); JsonGenerator jg = jsonFactory.createGenerator(out); jg.setPrettyPrinter(new DefaultPrettyPrinter()); jg.writeStartObject(); jg.writeStringField("message", "success"); jg.writeNumberField("count", 10); jg.writeArrayFieldStart("records"); for (int i = 0; i < 10; i++) { jg.writeObject(new EncodePojo()); Thread.sleep(100); jg.flush(); } jg.writeEndArray(); jg.writeEndObject(); jg.close(); } catch (JsonProcessingException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } }
From source file:piazza.services.ingest.test.SerializationTests.java
/** * Tests serialization and deserialization of GeoJSON Features *///from w w w. j a va 2 s . c om @Test public void testSerialization() throws Exception { List<String> geometries = new ArrayList<String>(Arrays.asList("Point", "Polygon", "LineString", "MultiPoint", "MultiPolygon", "MultiLineString", "GeometryCollection")); JsonGenerator generator = jsonFactory.createGenerator(System.out); File file; for (String geometryType : geometries) { // Load test file file = new File(String.format("%s%s.%s", resourceBasePath, geometryType, "geojson")); JsonParser parser = jsonFactory.createParser(file); // Read Geometry geometry = deserializer.deserialize(parser, null); // Write serializer.serialize(geometry, generator, null); } file = null; generator.close(); }
From source file:eu.mondo.driver.mongo.util.StatementSerializer.java
@Override public void serialize(Statement st, JsonGenerator generator, SerializerProvider provider) throws IOException, JsonProcessingException { generator.writeStartObject();//from w w w . ja va 2s. c om generator.writeStringField("subject", st.getSubject().toString()); generator.writeStringField("predicate", st.getPredicate().toString()); generator.writeStringField("object", st.getObject().toString()); generator.writeStringField("subjectBI", ""); generator.writeStringField("predicateBI", ""); generator.writeStringField("objectBI", ""); generator.writeEndObject(); generator.close(); }
From source file:org.openiot.security.oauth.OAuth20ProfileController.java
@Override protected ModelAndView handleRequestInternal(final HttpServletRequest request, final HttpServletResponse response) throws Exception { final String accessToken = request.getParameter(OAuthConstants.ACCESS_TOKEN); log.debug("accessToken : {}", accessToken); final JsonFactory jsonFactory = new JsonFactory(); final JsonGenerator jsonGenerator = jsonFactory.createJsonGenerator(response.getWriter()); response.setContentType("application/json"); // accessToken is required if (StringUtils.isBlank(accessToken)) { log.error("missing accessToken"); jsonGenerator.writeStartObject(); jsonGenerator.writeStringField("error", OAuthConstants.MISSING_ACCESS_TOKEN); jsonGenerator.writeEndObject();//from www. j a v a 2 s . co m jsonGenerator.close(); response.flushBuffer(); return null; } // get ticket granting ticket final TicketGrantingTicket ticketGrantingTicket = (TicketGrantingTicket) this.ticketRegistry .getTicket(accessToken); if (ticketGrantingTicket == null || ticketGrantingTicket.isExpired()) { log.error("expired accessToken : {}", accessToken); jsonGenerator.writeStartObject(); jsonGenerator.writeStringField("error", OAuthConstants.EXPIRED_ACCESS_TOKEN); jsonGenerator.writeEndObject(); jsonGenerator.close(); response.flushBuffer(); return null; } // generate profile : identifier + attributes final Principal principal = ticketGrantingTicket.getAuthentication().getPrincipal(); jsonGenerator.writeStartObject(); jsonGenerator.writeStringField(CasWrapperProfile.ID, principal.getId()); jsonGenerator.writeArrayFieldStart(CasWrapperProfile.ATTRIBUTES); final Map<String, Object> attributes = principal.getAttributes(); for (final String key : attributes.keySet()) { jsonGenerator.writeStartObject(); Object vals = attributes.get(key); if (vals instanceof Iterable<?>) { jsonGenerator.writeArrayFieldStart(key); for (final Object value : (Iterable<?>) vals) jsonGenerator.writeString(value.toString()); jsonGenerator.writeEndArray(); } else if ("role_name".equals(key)) { jsonGenerator.writeArrayFieldStart(key); if (!StringUtils.isBlank((String) vals)) jsonGenerator.writeString(vals.toString()); jsonGenerator.writeEndArray(); } else jsonGenerator.writeObjectField(key, attributes.get(key)); jsonGenerator.writeEndObject(); } jsonGenerator.writeEndArray(); jsonGenerator.writeEndObject(); jsonGenerator.close(); response.flushBuffer(); return null; }
From source file:ratpack.codahale.metrics.internal.WebSocketReporter.java
@Override @SuppressWarnings("rawtypes") public void report(SortedMap<String, Gauge> gauges, SortedMap<String, Counter> counters, SortedMap<String, Histogram> histograms, SortedMap<String, Meter> meters, SortedMap<String, Timer> timers) { try {/* www . j av a2 s. com*/ OutputStream out = new ByteArrayOutputStream(); JsonGenerator json = factory.createGenerator(out); json.writeStartObject(); json.writeNumberField("timestamp", clock.getTime()); writeTimers(json, timers); writeGauges(json, gauges); writeMeters(json, meters); writeCounters(json, counters); writeHistograms(json, histograms); json.writeEndObject(); json.flush(); json.close(); metricsBroadcaster.broadcast(out.toString()); } catch (IOException e) { LOGGER.log(Level.WARNING, "Exception encountered while reporting metrics: " + e.getLocalizedMessage()); } }
From source file:test.com.azaptree.services.json.JsonUtilsTest.java
@Test public void test_serialize_JSONEncoding() throws JsonGenerationException, IOException { final ByteArrayOutputStream bos = new ByteArrayOutputStream(); final JsonGenerator generator = JsonUtils.createJsonGenerator(bos, JsonEncoding.UTF8); generator.writeStartObject();/* w w w .ja v a 2 s .c om*/ generator.writeStringField("stringField", "stringFieldValue"); generator.writeNumberField("numberField", 5); generator.writeEndObject(); generator.close(); final Map<String, Object> test = JsonUtils.parse(new ByteArrayInputStream(bos.toByteArray())); Assert.assertEquals(test.get("stringField"), "stringFieldValue"); Assert.assertEquals(test.get("numberField"), 5); }
From source file:uk.ac.cam.cl.dtg.isaac.quiz.IsaacSymbolicValidator.java
@Override public QuestionValidationResponse validateQuestionResponse(final Question question, final Choice answer) throws ValidatorUnavailableException { Validate.notNull(question);/*from w ww .j av a2 s. c om*/ Validate.notNull(answer); if (!(question instanceof IsaacSymbolicQuestion)) { throw new IllegalArgumentException( String.format("This validator only works with Isaac Symbolic Questions... (%s is not symbolic)", question.getId())); } if (!(answer instanceof Formula)) { throw new IllegalArgumentException( String.format("Expected Formula for IsaacSymbolicQuestion: %s. Received (%s) ", question.getId(), answer.getClass())); } IsaacSymbolicQuestion symbolicQuestion = (IsaacSymbolicQuestion) question; Formula submittedFormula = (Formula) answer; // These variables store the important features of the response we'll send. Content feedback = null; // The feedback we send the user MatchType responseMatchType = MatchType.NONE; // The match type we found boolean responseCorrect = false; // Whether we're right or wrong // There are several specific responses the user can receive. Each of them will set feedback content, so // use that to decide whether to proceed to the next check in each case. // STEP 0: Do we even have any answers for this question? Always do this check, because we know we // won't have feedback yet. if (null == symbolicQuestion.getChoices() || symbolicQuestion.getChoices().isEmpty()) { log.error("Question does not have any answers. " + question.getId() + " src: " + question.getCanonicalSourceFile()); feedback = new Content("This question does not have any correct answers"); } // STEP 1: Did they provide an answer? if (null == feedback && (null == submittedFormula.getPythonExpression() || submittedFormula.getPythonExpression().isEmpty())) { feedback = new Content("You did not provide an answer"); } // STEP 2: Otherwise, Does their answer match a choice exactly? if (null == feedback) { // For all the choices on this question... for (Choice c : symbolicQuestion.getChoices()) { // ... that are of the Formula type, ... if (!(c instanceof Formula)) { log.error("Isaac Symbolic Validator for questionId: " + symbolicQuestion.getId() + " expected there to be a Formula. Instead it found a Choice."); continue; } Formula formulaChoice = (Formula) c; // ... and that have a python expression ... if (null == formulaChoice.getPythonExpression() || formulaChoice.getPythonExpression().isEmpty()) { log.error("Expected python expression, but none found in choice for question id: " + symbolicQuestion.getId()); continue; } // ... look for an exact string match to the submitted answer. if (formulaChoice.getPythonExpression().equals(submittedFormula.getPythonExpression())) { feedback = (Content) formulaChoice.getExplanation(); responseMatchType = MatchType.EXACT; responseCorrect = formulaChoice.isCorrect(); } } } // STEP 3: Otherwise, use the symbolic checker to analyse their answer if (null == feedback) { // Go through all choices, keeping track of the best match we've seen so far. A symbolic match terminates // this loop immediately. A numeric match may later be replaced with a symbolic match, but otherwise will suffice. Formula closestMatch = null; MatchType closestMatchType = MatchType.NONE; // Sort the choices so that we match incorrect choices last, taking precedence over correct ones. List<Choice> orderedChoices = Lists.newArrayList(symbolicQuestion.getChoices()); Collections.sort(orderedChoices, new Comparator<Choice>() { @Override public int compare(Choice o1, Choice o2) { int o1Val = o1.isCorrect() ? 0 : 1; int o2Val = o2.isCorrect() ? 0 : 1; return o1Val - o2Val; } }); // For all the choices on this question... for (Choice c : orderedChoices) { // ... that are of the Formula type, ... if (!(c instanceof Formula)) { // Don't need to log this - it will have been logged above. continue; } Formula formulaChoice = (Formula) c; // ... and that have a python expression ... if (null == formulaChoice.getPythonExpression() || formulaChoice.getPythonExpression().isEmpty()) { // Don't need to log this - it will have been logged above. continue; } // ... test their answer against this choice with the symbolic checker. // We don't do any sanitisation of user input here, we'll leave that to the python. MatchType matchType = MatchType.NONE; try { // This is ridiculous. All I want to do is pass some JSON to a REST endpoint and get some JSON back. ObjectMapper mapper = new ObjectMapper(); HashMap<String, String> req = Maps.newHashMap(); req.put("target", formulaChoice.getPythonExpression()); req.put("test", submittedFormula.getPythonExpression()); req.put("description", symbolicQuestion.getId()); StringWriter sw = new StringWriter(); JsonGenerator g = new JsonFactory().createGenerator(sw); mapper.writeValue(g, req); g.close(); String requestString = sw.toString(); HttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost("http://" + hostname + ":" + port + "/check"); httpPost.setEntity(new StringEntity(requestString, "UTF-8")); httpPost.addHeader("Content-Type", "application/json"); HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity responseEntity = httpResponse.getEntity(); String responseString = EntityUtils.toString(responseEntity); HashMap<String, Object> response = mapper.readValue(responseString, HashMap.class); if (response.containsKey("error")) { if (response.containsKey("code")) { log.error("Failed to check formula \"" + submittedFormula.getPythonExpression() + "\" against \"" + formulaChoice.getPythonExpression() + "\": " + response.get("error")); } else { // If it doesn't contain a code, it wasn't a fatal error in the checker; probably only a // problem with the submitted answer. log.warn("Problem checking formula \"" + submittedFormula.getPythonExpression() + "\" for (" + symbolicQuestion.getId() + ") with symbolic checker: " + response.get("error")); } } else { if (response.get("equal").equals("true")) { matchType = MatchType.valueOf(((String) response.get("equality_type")).toUpperCase()); } } } catch (IOException e) { log.error( "Failed to check formula with symbolic checker. Is the server running? Not trying again."); throw new ValidatorUnavailableException( "We are having problems marking Symbolic Questions." + " Please try again later!"); } if (matchType == MatchType.EXACT) { closestMatch = formulaChoice; closestMatchType = MatchType.EXACT; break; } else if (matchType.compareTo(closestMatchType) > 0) { if (formulaChoice.getRequiresExactMatch() && formulaChoice.isCorrect()) { closestMatch = formulaChoice; closestMatchType = matchType; } else { if (closestMatch == null || !closestMatch.getRequiresExactMatch()) { closestMatch = formulaChoice; closestMatchType = matchType; } else { // This is not as good a match as the one we already have. } } } } if (null != closestMatch) { // We found a decent match. Of course, it still might be wrong. if (closestMatchType != MatchType.EXACT && closestMatch.getRequiresExactMatch()) { if (closestMatch.isCorrect()) { feedback = new Content( "Your answer is not in the form we expected. Can you rearrange or simplify it?"); responseCorrect = false; responseMatchType = closestMatchType; log.info("User submitted an answer that was close to an exact match, but not exact " + "for question " + symbolicQuestion.getId() + ". Choice: " + closestMatch.getPythonExpression() + ", submitted: " + submittedFormula.getPythonExpression()); } else { // This is weak match to a wrong answer; we can't use the feedback for the choice. } } else { feedback = (Content) closestMatch.getExplanation(); responseCorrect = closestMatch.isCorrect(); responseMatchType = closestMatchType; } if (closestMatchType == MatchType.NUMERIC) { log.info("User submitted an answer that was only numerically equivalent to one of our choices " + "for question " + symbolicQuestion.getId() + ". Choice: " + closestMatch.getPythonExpression() + ", submitted: " + submittedFormula.getPythonExpression()); // TODO: Decide whether we want to add something to the explanation along the lines of "you got it // right, but only numerically. } } } // If we got this far and feedback is still null, they were wrong. There's no useful feedback we can give at this point. return new FormulaValidationResponse(symbolicQuestion.getId(), answer, feedback, responseCorrect, responseMatchType.toString(), new Date()); }
From source file:com.microsoft.azure.storage.blob.BlobEncryptionData.java
public String serialize() throws IOException { final StringWriter strWriter = new StringWriter(); JsonGenerator generator = Utility.getJsonGenerator(strWriter); try {//from ww w .j a va 2 s . c o m // start object generator.writeStartObject(); // write the encryption mode generator.writeStringField(Constants.EncryptionConstants.ENCRYPTION_MODE, Constants.EncryptionConstants.FULL_BLOB); // write the encryption data this.serialize(generator); // end object generator.writeEndObject(); } finally { generator.close(); } return strWriter.toString(); }