Examples of org.codehaus.jackson.JsonGenerator

org.codehaus.jackson.JsonGenerator
Base class that defines public API for writing JSON content. Instances are created using factory methods of a {@link JsonFactory} instance. @author Tatu Saloranta


                        @Override
                        public void writeTo(BufferedWriter out) throws IOException {


                            while(entryIterator.hasNext()) {
                                final JsonGenerator generator = new JsonFactory(new ObjectMapper()).createJsonGenerator(out);
                                Pair<ByteArray, Versioned<byte[]>> kvPair = entryIterator.next();
                                byte[] keyBytes = kvPair.getFirst().get();
                                byte[] valueBytes = kvPair.getSecond().getValue();
                                VectorClock version = (VectorClock) kvPair.getSecond().getVersion();


                                Object keyObject = keySerializer.toObject((null == keyCompressionStrategy) ? keyBytes
                                                                                                          : keyCompressionStrategy.inflate(keyBytes));
                                Object valueObject = valueSerializer.toObject((null == valueCompressionStrategy) ? valueBytes
                                                                                                                : valueCompressionStrategy.inflate(valueBytes));
                                if(keyObject instanceof GenericRecord) {
                                    out.write(keyObject.toString());
                                } else {
                                    generator.writeObject(keyObject);
                                }
                                out.write(' ' + version.toString() + ' ');
                                if(valueObject instanceof GenericRecord) {
                                    out.write(valueObject.toString());
                                } else {
                                    generator.writeObject(valueObject);
                                }
                                out.write('\n');
                            }
                        }
                    });

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    private Response buildJsonpResponse(final String attribute, final Cache<Object, Object> samples, final String callback)
    {
        try {
            final ByteArrayOutputStream out = new ByteArrayOutputStream();
            final JsonGenerator generator = objectMapper.getJsonFactory().createJsonGenerator(out);
            generator.writeStartObject();


            generator.writeFieldName("attribute");
            generator.writeString(attribute);


            generator.writeFieldName("samples");
            generator.writeStartArray();


            if (samples != null) {
                final ConcurrentMap<Object, Object> samplesForType = samples.asMap();


                final List<DateTime> timestamps = new ArrayList<DateTime>();
                for (final Object timestamp : samplesForType.keySet()) {
                    timestamps.add((DateTime) timestamp);
                }
                Collections.sort(timestamps);


                for (final DateTime timestamp : timestamps) {
                    final Object dataPoint = samplesForType.get(timestamp);
                    // Might have been evicted already
                    if (dataPoint != null) {
                        generator.writeNumber(unixSeconds(timestamp));
                        generator.writeObject(dataPoint);
                    }
                }
            }


            generator.writeEndArray();


            generator.writeEndObject();
            generator.close();


            final JSONPObject object = new JSONPObject(callback, out.toString());
            return Response.ok(object).build();
        }
        catch (IOException e) {

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  }


  @Override
  public void encode(Trace trace, OutputStream outputStream) throws IOException
  {
    final JsonGenerator generator = OBJECT_MAPPER.getJsonFactory()
                                                 .createJsonGenerator(outputStream, JsonEncoding.UTF8);
    JsonTraceSerializer.serialize(trace, generator);
    generator.flush();
  }

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  protected<T> String makeJsonResponse(T obj, DatabusRequest request)
  throws IOException
  {
    StringWriter out = new StringWriter(102400);
    ObjectMapper mapper = new ObjectMapper();
    JsonGenerator jsonGen = createJsonGenerator(mapper, out,
                                                null != request.getParams().getProperty(PRETTY_PRINT_PARAM));
    mapper.writeValue(jsonGen, obj);
    return out.toString();
  }

View Full Code Here

      DatumReader<Object> reader = new GenericDatumReader<Object>(schema);
      binDecoder.set(DecoderFactory.defaultFactory().createBinaryDecoder(valueBytes, binDecoder.get()));


      Object datum = reader.read(null, binDecoder.get());
      DatumWriter<Object> writer = new GenericDatumWriter<Object>(schema);
      JsonGenerator g = new JsonFactory().createJsonGenerator(out, JsonEncoding.UTF8);
      // write the src ID
      g.writeStartObject();
      g.writeFieldName(SRC_ID_FIELD_NAME);
      g.writeNumber(e.getSourceId());
      g.writeFieldName(OPCODE_FIELD_NAME);
      g.writeString(e.getOpcode().toString());
      g.writeFieldName("partId");
      g.writeNumber(Integer.valueOf(e.getPartitionId()));


      g.writeFieldName(VALUE_FIELD_NAME);
      writer.write(datum, new JsonEncoder(schema, g));
      g.writeEndObject();
      g.writeEndObject();
      try {
        g.writeEndObject();
      }
      catch (JsonGenerationException e_json) {
        // ignore the error as some how avro JsonEncoder may some times missing two }
      }
      g.flush();
    } catch (IOException e1) {
      LOG.error("event value serialization error; event = " + e, e1);
    }
  }

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    return result;
  }


  public void convert(InputStream in, OutputStream out) throws IOException
  {
    JsonGenerator jsonGenerator = (new JsonFactory()).createJsonGenerator(new OutputStreamWriter(out));
    if (AvroFormat.JSON == _outputFormat) jsonGenerator.useDefaultPrettyPrinter();


    List<GenericRecord> result = convert(in);
    Encoder outputEncoder = (AvroFormat.BINARY == _outputFormat) ?
        new BinaryEncoder(out) :
        new JsonEncoder(_outputSchema, jsonGenerator);

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    case JSON:
    {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      JsonFactory f = new JsonFactory();
      try {
        JsonGenerator g = f.createJsonGenerator(baos, JsonEncoding.UTF8);
        g.writeStartObject();
        int version = getVersion();
        if (version == DbusEventFactory.DBUS_EVENT_V1)
        {
          writeJSON_V1(g,encoding);
        } else {
          writeJSON_V2(g,encoding);
        }


        g.writeEndObject();
        g.flush();
        baos.write("\n".getBytes(Charset.defaultCharset()));
      } catch (IOException e) {
        LOG.error("JSON write error: " + e.getMessage(), e);
      }
      ByteBuffer writeBuffer = ByteBuffer.wrap(baos.toByteArray()).order(_buf.order());

View Full Code Here


    @Override
    public String toJson(Object obj) {
        StringWriter writer = new StringWriter();
        try {
            JsonGenerator jsonGenerator = objectMapper.getJsonFactory().createJsonGenerator(writer);
            objectMapper.writeValue(jsonGenerator, obj);
            writer.close();
            return writer.getBuffer().toString();
        } catch (IOException e) {
            throw new InvalidJsonException();

View Full Code Here

   * @throws IOException
   */
  public static void dumpConfiguration(Configuration config,
      Writer out) throws IOException {
    JsonFactory dumpFactory = new JsonFactory();
    JsonGenerator dumpGenerator = dumpFactory.createJsonGenerator(out);
    dumpGenerator.writeStartObject();
    dumpGenerator.writeFieldName("properties");
    dumpGenerator.writeStartArray();
    dumpGenerator.flush();
    synchronized (config) {
      for (Map.Entry<Object,Object> item: config.getProps().entrySet()) {
        dumpGenerator.writeStartObject();
        dumpGenerator.writeStringField("key", (String) item.getKey());
        dumpGenerator.writeStringField("value",
                                       config.get((String) item.getKey()));
        dumpGenerator.writeBooleanField("isFinal",
                                        config.finalParameters.contains(item.getKey()));
        dumpGenerator.writeStringField("resource",
                                       config.updatingResource.get(item.getKey()));
        dumpGenerator.writeEndObject();
      }
    }
    dumpGenerator.writeEndArray();
    dumpGenerator.writeEndObject();
    dumpGenerator.flush();
  }

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    if (onlyTheseKeys != null && onlyTheseKeys.isEmpty())
      return;


    try {
      JsonFactory f = new JsonFactory();
      JsonGenerator g = f.createJsonGenerator(bundleFile, JsonEncoding.UTF8);
      g.useDefaultPrettyPrinter();
      g.writeStartObject();
      Set<String> orderedKeys = new TreeSet<String>(i18nValues.keySet());
      for (String key : orderedKeys) {
        String value = i18nValues.get(key);
        if (onlyTheseKeys == null || onlyTheseKeys.contains(key))
          g.writeStringField(key, value);
      }
      g.writeEndObject();
      g.close();
    }
    catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

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