Java Code Examples for com.fasterxml.jackson.core.JsonGenerator

@Override
public void writeMetaData(OutputStream out, ResourceWithMetadata resource, Map<String, ResourceWithMetadata> allApiResources) throws IOException
{
    
    final Object result = processResult(resource,allApiResources);

    assistant.getJsonHelper().withWriter(out, new Writer()
    {
        @Override
        public void writeContents(JsonGenerator generator, ObjectMapper objectMapper)
                    throws JsonGenerationException, JsonMappingException, IOException
        {           
           objectMapper.writeValue(generator, result);
        }
    });
}
 

@Override
public void serialize(CategoryLines categoryLines,
                      JsonGenerator jgen,
                      SerializerProvider provider) throws
                                                   IOException,
                                                   JsonProcessingException {
  jgen.writeStartObject();

  super.serialize(categoryLines, jgen, provider);

  if (categoryLines.getWidth() != null) {
    jgen.writeObjectField("width", categoryLines.getWidth());
  }
  if (categoryLines.getStyles() != null) {
    jgen.writeObjectField("styles", categoryLines.getStyles());
  } else {
    jgen.writeObjectField("style", categoryLines.getStyle().toString());
  }
  if (categoryLines.getInterpolation() != null) {
    jgen.writeObjectField("interpolation", categoryLines.getInterpolation());
  }

  jgen.writeEndObject();
}
 

private void writeHistorieRecordKop(final JsonGenerator jgen, final BlobViewGroep groep) throws IOException {
    jgen.writeArrayFieldStart("kolomtitels");
    jgen.writeString(INDEX_OBJECT);
    if (isFormeel(groep.getElement())) {
        jgen.writeString(TIJDSTIP_REGISTRATIE);
        jgen.writeString(TIJDSTIP_VERVAL);
        jgen.writeString(NADERE_AANDUIDING_VERVAL);
        jgen.writeString(ActieType.INHOUD.getOmschrijving());
        jgen.writeString(ActieType.VERVAL.getOmschrijving());
        jgen.writeString(CSS);

    } else if (isMaterieel(groep.getElement())) {
        jgen.writeString(DATUM_INGANG_GELDIGHEID);
        jgen.writeString(DATUM_EINDE_GELDIGHEID);
        jgen.writeString(TIJDSTIP_REGISTRATIE);
        jgen.writeString(TIJDSTIP_VERVAL);
        jgen.writeString(NADERE_AANDUIDING_VERVAL);
        jgen.writeString(ActieType.INHOUD.getOmschrijving());
        jgen.writeString(ActieType.AANPASSING.getOmschrijving());
        jgen.writeString(ActieType.VERVAL.getOmschrijving());
        jgen.writeString(CSS);
    }
    jgen.writeString(DETAIL);
    jgen.writeEndArray();
}
 

protected void serialize(T chart, JsonGenerator jgen) throws IOException {

    super.serialize(chart, jgen);

    String type = chart.getClass().getSimpleName();
    if ("SimpleTimePlot".equals(type)){
      jgen.writeObjectField("type", "TimePlot");
    }else {
      jgen.writeObjectField("type", type);
    }

    jgen.writeObjectField(INIT_WIDTH, chart.getInitWidth());
    jgen.writeObjectField(INIT_HEIGHT, chart.getInitHeight());
    jgen.writeObjectField(CHART_TITLE, chart.getTitle());
    jgen.writeObjectField(SHOW_LEGEND, chart.getShowLegend());
    jgen.writeObjectField(USE_TOOL_TIP, chart.getUseToolTip());
    jgen.writeObjectField(LEGEND_POSITION, chart.getLegendPosition());
    jgen.writeObjectField("legend_layout", chart.getLegendLayout());
    jgen.writeObjectField("custom_styles", chart.getCustomStyles());
    jgen.writeObjectField("element_styles", chart.getElementStyles());
  }
 

private void configureFeature(ObjectMapper objectMapper, Object feature, boolean enabled) {
	if (feature instanceof JsonParser.Feature) {
		objectMapper.configure((JsonParser.Feature) feature, enabled);
	}
	else if (feature instanceof JsonGenerator.Feature) {
		objectMapper.configure((JsonGenerator.Feature) feature, enabled);
	}
	else if (feature instanceof SerializationFeature) {
		objectMapper.configure((SerializationFeature) feature, enabled);
	}
	else if (feature instanceof DeserializationFeature) {
		objectMapper.configure((DeserializationFeature) feature, enabled);
	}
	else if (feature instanceof MapperFeature) {
		objectMapper.configure((MapperFeature) feature, enabled);
	}
	else {
		throw new FatalBeanException("Unknown feature class: " + feature.getClass().getName());
	}
}
 

@Override
public void serialize(JsonMeter jsonMeter,
                      JsonGenerator json,
                      SerializerProvider provider) throws IOException {
    json.writeStartObject();
    json.writeStringField("name", jsonMeter.name());
    json.writeObjectField(timestampFieldname, jsonMeter.timestampAsDate());
    Meter meter = jsonMeter.value();
    json.writeNumberField("count", meter.getCount());
    json.writeNumberField("m1_rate", meter.getOneMinuteRate() * rateFactor);
    json.writeNumberField("m5_rate", meter.getFiveMinuteRate() * rateFactor);
    json.writeNumberField("m15_rate", meter.getFifteenMinuteRate() * rateFactor);
    json.writeNumberField("mean_rate", meter.getMeanRate() * rateFactor);
    json.writeStringField("units", rateUnit);
    addOneOpsMetadata(json);
    json.writeEndObject();
}
 

@Override
public void serialize(final TradingStatusType value, final JsonGenerator gen, final SerializerProvider serializers) throws IOException {
    if (value == null || value == TradingStatusType.UNKNOWN) {
        gen.writeNull();
        return;
    }

    switch (value) {
        case TRADING_HALTED:
            gen.writeString("H");
            break;
        case TRADING_HALT_RELEASED_INTO_ORDER_ACCEPTANCE_PERIOD:
            gen.writeString("O");
            break;
        case TRADING_PAUSED_AND_ORDER_ACCEPTANCE_PERIOD_ON_IEX:
            gen.writeString("P");
            break;
        case TRADING_ON_IEX:
            gen.writeString("T");
            break;
        default:
            gen.writeNull();
            break;
    }
}
 

private void _testFailOnWritingStringFromReaderWithTooFewCharacters(JsonFactory f, boolean useReader) throws Exception{
    JsonGenerator gen;
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    if (useReader) {
        gen = f.createGenerator(ObjectWriteContext.empty(), new OutputStreamWriter(bout, "UTF-8"));
    } else {
        gen = f.createGenerator(ObjectWriteContext.empty(), bout, JsonEncoding.UTF8);
    }
    gen.writeStartObject();

    try {
        String testStr = "aaaaaaaaa";
        StringReader reader = new StringReader(testStr);
        gen.writeFieldName("a");
        gen.writeString(reader, testStr.length() + 1);
        gen.flush();
        String json = bout.toString("UTF-8");
        fail("Should not have let "+gen.getClass().getName()+".writeString() ': output = "+json);
    } catch (JsonProcessingException e) {
        verifyException(e, "Didn't read enough from reader");
    }
    gen.close();
}
 

@Override
public void serialize(JsonGenerator generator) throws IOException {
	generator.writeNumber(getCode());
	generator.writeNumber(this.sessionId);

	generator.writeStartObject();

	generator.writeObjectFieldStart("roles");
	for (WampRole wampRole : this.roles) {
		generator.writeObjectFieldStart(wampRole.getRole());
		if (wampRole.hasFeatures()) {
			generator.writeObjectFieldStart("features");
			for (String feature : wampRole.getFeatures()) {
				generator.writeBooleanField(feature, true);
			}
			generator.writeEndObject();
		}
		generator.writeEndObject();
	}
	generator.writeEndObject();

	if (this.realm != null) {
		generator.writeStringField("realm", this.realm);
	}
	generator.writeEndObject();
}
 

@Override
public void serialize(final BerichtListView value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException {
    jgen.writeStartObject();
    if (value.getBericht() != null) {
        JsonUtils.writeAsInteger(jgen, BerichtModule.ID, ObjectUtils.getWaarde(value, "bericht.id"));
        JsonUtils.writeAsInteger(jgen, BerichtModule.SOORT, ObjectUtils.getWaarde(value, "bericht.soortBericht.id"));
        JsonUtils.writeAsInteger(jgen, BerichtModule.ZENDENDE_PARTIJ, ObjectUtils.getWaarde(value, "bericht.zendendePartij"));
        JsonUtils.writeAsInteger(jgen, BerichtModule.ONTVANGENDE_PARTIJ, ObjectUtils.getWaarde(value, "bericht.ontvangendePartij"));
        JsonUtils.writeAsString(jgen, BerichtModule.REFERENTIENUMMER, value.getBericht().getReferentieNummer());
        JsonUtils.writeAsString(jgen, BerichtModule.CROSS_REFERENTIENUMMER, value.getBericht().getCrossReferentieNummer());
        JsonUtils.writeAsString(jgen, BerichtModule.VERZENDDATUM, ObjectUtils.getGeformateerdeWaarde(value, "bericht.datumTijdVerzending", sdf));
        JsonUtils.writeAsString(jgen, BerichtModule.ONTVANGSTDATUM, ObjectUtils.getGeformateerdeWaarde(value, "bericht.datumTijdOntvangst", sdf));
        JsonUtils.writeAsInteger(jgen, BerichtModule.SOORT_SYNCHRONISATIE, ObjectUtils.getWaarde(value, "bericht.soortSynchronisatie.id"));
        JsonUtils.writeAsInteger(jgen, BerichtModule.VERWERKINGSWIJZE, ObjectUtils.getWaarde(value, "bericht.verwerkingswijze.id"));
        JsonUtils.writeAsInteger(jgen, BerichtModule.BIJHOUDING, ObjectUtils.getWaarde(value, "bericht.bijhoudingResultaat.id"));
    }
    jgen.writeEndObject();

}
 

private void maakCssLinkObject(final ActieType actieType, final BlobViewObject actie, final StringBuilder ccsClassBuilder, final JsonGenerator jgen)
        throws IOException {
    if (actie != null) {
        final BlobViewObject administratieveHandeling = actie.getParent();

        ccsClassBuilder.append(BRP_MARKEER);
        ccsClassBuilder.append(administratieveHandeling.getObjectsleutel());
        ccsClassBuilder.append(" ");
        jgen.writeObjectFieldStart(actieType.getOmschrijving());
        jgen.writeStringField(TYPE, CSS_LINK);
        jgen.writeStringField(LINK_TEKST, "Ja (actie " + actie.getObjectsleutel() + ")");
        jgen.writeStringField(LINK, BRP_MARKEER + administratieveHandeling.getObjectsleutel());
        jgen.writeEndObject();
    } else {
        jgen.writeObjectFieldStart(actieType.getOmschrijving());
        jgen.writeStringField(TYPE, CSS_LINK);
        jgen.writeStringField(LINK_TEKST, "Nee");
        jgen.writeStringField(LINK, "");
        jgen.writeEndObject();
    }
}
 

@Override
public void serialize(final Version value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException {
    jgen.writeStartObject();

    writeVersieRegel(jgen, value.getMainVersion());

    jgen.writeArrayFieldStart(VersieModule.COMPONENTEN);
    for (final VersionLine component : value.getComponentVersions()) {
        jgen.writeStartObject();
        writeVersieRegel(jgen, component);
        jgen.writeEndObject();
    }
    jgen.writeEndArray();

    jgen.writeEndObject();
}
 

@Override
public void serialize(JsonGenerator generator) throws IOException {
	generator.writeNumber(getCode());
	generator.writeNumber(this.requestId);
	generator.writeStartObject();
	generator.writeEndObject();

	if (this.argumentsKw != null) {
		if (this.arguments == null) {
			generator.writeStartArray();
			generator.writeEndArray();
		}
		else {
			generator.writeObject(this.arguments);
		}
		generator.writeObject(this.argumentsKw);
	}
	else if (this.arguments != null) {
		generator.writeObject(this.arguments);
	}
}
 

@Override
public void serialize(LinksInformation value, JsonGenerator gen, SerializerProvider serializers)
		throws IOException {

	gen.writeStartObject();

	BeanInformation info = BeanInformation.get(value.getClass());

	for (String attrName : info.getAttributeNames()) {
		BeanAttributeInformation attribute = info.getAttribute(attrName);
		Object linkValue = attribute.getValue(value);
		if (linkValue != null) {
			gen.writeObjectFieldStart(attrName);
			if (linkValue instanceof String) {
				gen.writeStringField(SerializerUtil.HREF, linkValue.toString());
			}
			else {
				gen.writeObject(linkValue);
			}
			gen.writeEndObject();
		}
	}

	gen.writeEndObject();

}
 

@Override
    public void serialize(Wrapper<?> value, JsonGenerator gen, SerializerProvider provider) throws IOException {
        // TODO: maybe find a cleaner way to do this
        if(Vector.class.isAssignableFrom(value.getWrappedClass())) {
            // value is a vector, just write the coordinates
            gen.writeObject(((Vector) value.getWrapped()).toArray());
            return;
        }
        gen.writeStartObject();
        gen.writeStringField("class", value.getWrappedClass().getSimpleName());
        gen.writeNumberField("id", value.getWrappedId());
        value.getValues().forEach((name, obj) -> {
            try {
                gen.writeObjectField(name, obj);
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
//        for(Property p : value.getProperties()) {
//            gen.writeObjectField(p.getName(), p);
//        }
        gen.writeEndObject();
    }
 

protected BasicJsonOutput(JsonGenerator gen, DateOutputFormat dateOutput) {
  Preconditions.checkNotNull(dateOutput);
  Preconditions.checkNotNull(gen);

  this.gen = gen;

  switch (dateOutput) {
  case SQL: {
    dateFormatter = DateUtility.formatDate.withZoneUTC();
    timeFormatter = DateUtility.formatTime.withZoneUTC();
    timestampFormatter = DateUtility.formatTimeStampMilli.withZoneUTC();
    break;
  }
  case ISO: {
    dateFormatter = ISODateTimeFormat.date().withZoneUTC();
    timeFormatter = ISODateTimeFormat.time().withZoneUTC();
    timestampFormatter = ISODateTimeFormat.dateTime().withZoneUTC();
    break;
  }

  default:
    throw new UnsupportedOperationException(String.format("Unable to support date output of type %s.", dateOutput));
  }
}
 

public static void serializeFeaturesReply(OFFeaturesReply fr, JsonGenerator jGen) throws IOException, JsonProcessingException {
	/* Common to All OF Versions */			
	jGen.writeStringField("capabilities", fr.getCapabilities().toString());
	jGen.writeStringField("dpid", fr.getDatapathId().toString());
	jGen.writeNumberField("buffers", fr.getNBuffers());
	jGen.writeNumberField("tables", fr.getNTables());
	jGen.writeStringField("version", fr.getVersion().toString());

	if (fr.getVersion().compareTo(OFVersion.OF_13) < 0) { // OF1.3+ break this out into port_config
		serializePortDesc(fr.getPorts(), jGen);
	}
	if (fr.getVersion().compareTo(OFVersion.OF_10) == 0) {
		String actions = "[";
		for (OFActionType action : fr.getActions()) {
			actions =  actions + action.toString() + ", ";
		}
		actions = actions.substring(0, actions.length() - 2); // remove ending space+comma
		actions = actions + "]";
		jGen.writeStringField("actions", actions);
	}
}
 

@Override
public boolean writeObject(Object obj, JsonGenerator jgen, boolean expand) throws JsonProcessingException, IOException {
  logger.debug("generic map");
  // convert this 'on the fly' to a map of objects
  Map<?,?> m = (Map<?,?>) obj;

  Set<?> kset = m.keySet();
  if (kset.size()==0 || !(kset.iterator().next() instanceof String))
    jgen.writeObject(obj.toString());
  else {
    jgen.writeStartObject();
    for (Object k : kset) {
      jgen.writeFieldName((null==k)?"null":k.toString());
      if (!parent.writeObject(m.get(k), jgen, false))
        jgen.writeObject(m.get(k)!=null ? (m.get(k).toString()) : "null");
    }
    jgen.writeEndObject();
  }
  return true;
}
 

/**
  * Performs the serialization of a OneComponentTime object
  */
@Override
public void serialize(CumulativeTimeBucket ctb,
                JsonGenerator jGen,
                SerializerProvider serializer) 
                throws IOException, JsonProcessingException {
    jGen.writeStartObject();
    Timestamp ts = new Timestamp(ctb.getStartTimeNs()/1000000);
    jGen.writeStringField("start-time", ts.toString());
    jGen.writeStringField("current-time", 
      new Timestamp(System.currentTimeMillis()).toString());
    jGen.writeNumberField("total-packets", ctb.getTotalPktCnt());
    jGen.writeNumberField("average", ctb.getAverageProcTimeNs());
    jGen.writeNumberField("min", ctb.getMinTotalProcTimeNs());
    jGen.writeNumberField("max", ctb.getMaxTotalProcTimeNs());
    jGen.writeNumberField("std-dev", ctb.getTotalSigmaProcTimeNs());
    jGen.writeArrayFieldStart("modules");
    for (OneComponentTime oct : ctb.getModules()) {
        serializer.defaultSerializeValue(oct, jGen);
    }
    jGen.writeEndArray();
    jGen.writeEndObject();
}
 

@Test
public void testSerializeComment() throws IOException
{
    final Comment aComment = new Comment();
    aComment.setContent("<b>There it is</b>");
    ByteArrayOutputStream out = new ByteArrayOutputStream();

    jsonHelper.withWriter(out, new Writer()
    {
        @Override
        public void writeContents(JsonGenerator generator, ObjectMapper objectMapper)
                    throws JsonGenerationException, JsonMappingException, IOException
        {
            FilterProvider fp = new SimpleFilterProvider().addFilter(
                        JacksonHelper.DEFAULT_FILTER_NAME, new ReturnAllBeanProperties());
            objectMapper.writer(fp).writeValue(generator, aComment);
        }
    });
    assertTrue(out.toString().contains("{\"content\":\"<b>There it is</b>\""));
}
 

public static void writeJson(Writer writer, Consumer<JsonGenerator> consumer) {
    Objects.requireNonNull(writer);
    Objects.requireNonNull(consumer);
    JsonFactory factory = new JsonFactory();
    try (JsonGenerator generator = factory.createGenerator(writer)) {
        generator.useDefaultPrettyPrinter();
        consumer.accept(generator);
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}
 

@Override
public void serialize(I18NStrings value, JsonGenerator jgen, SerializerProvider provider) throws IOException,
	JsonProcessingException
{
	jgen.writeStartObject();
	Map<String, String> strings = value.getStrings();
	for( Entry<String, String> string : strings.entrySet() )
	{
		jgen.writeFieldName(string.getKey());
		jgen.writeString(string.getValue());
	}
	jgen.writeEndObject();
}
 

@Override
public void serialize(SwitchPortBandwidth spb, JsonGenerator jGen, SerializerProvider serializer) throws IOException, JsonProcessingException {
	jGen.configure(Feature.WRITE_NUMBERS_AS_STRINGS, true);

	jGen.writeStartObject();
	jGen.writeStringField("dpid", spb.getSwitchId().toString());
	jGen.writeStringField("port", spb.getSwitchPort().toString());
	jGen.writeStringField("updated", new Date(spb.getUpdateTime()).toString());
	jGen.writeStringField("bits-per-second-rx", spb.getBitsPerSecondRx().getBigInteger().toString());
	jGen.writeStringField("bits-per-second-tx", spb.getBitsPerSecondTx().getBigInteger().toString());
	jGen.writeEndObject();
}
 

@Override
public void serialize(Uuid value, JsonGenerator generator,
                      SerializerProvider provider) throws IOException {
    generator.writeStartArray();
    String reg = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$";
    if (value.value().matches(reg)) {
        generator.writeString("uuid");
    } else {
        generator.writeString("named-uuid");
    }
    generator.writeString(value.value());
    generator.writeEndArray();
}
 

@Override
public void serialize(Date date, JsonGenerator jgen,
                      SerializerProvider provider) throws JsonProcessingException {
    try {
        DateFormat dateFormat = new SimpleDateFormat(pattern);
        jgen.writeString(dateFormat.format(date));
    } catch (IOException e) {
        throw new RuntimeException("Date转换json异常，格式：" + pattern);
    }
    //		log.debug("日期类型序列化");
}
 

private void schrijfBerichtStuurgegevens(final JsonGenerator jgen, final BerichtDetailView value) throws IOException {
    JsonUtils.writeAsInteger(jgen, BerichtModule.ID, ObjectUtils.getWaarde(value, "bericht.id"));
    JsonUtils.writeAsInteger(jgen, BerichtModule.SOORT, ObjectUtils.getWaarde(value, "bericht.soortBericht.id"));
    JsonUtils.writeAsString(jgen, BerichtModule.SOORT_NAAM, ObjectUtils.getWaarde(value, "bericht.soortBericht.identifier"));
    JsonUtils.writeAsInteger(jgen, BerichtModule.ZENDENDE_PARTIJ, ObjectUtils.getWaarde(value, "bericht.zendendePartij"));
    JsonUtils.writeAsInteger(jgen, BerichtModule.ONTVANGENDE_PARTIJ, ObjectUtils.getWaarde(value, "bericht.ontvangendePartij"));
    JsonUtils.writeAsString(jgen, BerichtModule.REFERENTIENUMMER, value.getBericht().getReferentieNummer());
    JsonUtils.writeAsString(jgen, BerichtModule.CROSS_REFERENTIENUMMER, value.getBericht().getCrossReferentieNummer());
    JsonUtils.writeAsString(jgen, BerichtModule.VERZENDDATUM, ObjectUtils.getGeformateerdeWaarde(value, "bericht.datumTijdVerzending", sdf));
    JsonUtils.writeAsString(jgen, BerichtModule.ONTVANGSTDATUM, ObjectUtils.getGeformateerdeWaarde(value, "bericht.datumTijdOntvangst", sdf));
}
 

private void processStructStart(JsonToken token, JsonGenerator jgen) throws IOException {
  if (token.id() == JsonToken.START_OBJECT.id()) {
    jgen.writeStartObject();
  } else if (token.id() == JsonToken.START_ARRAY.id()) {
    jgen.writeStartArray();
  } else {
    LOGGER.error("Illegal struct start {}", token.id());
    throw new RuntimeException("Illegal struct start " + token.id());
  }
}
 

public static void serializePortReply(List<OFPortStatsReply> portReplies, JsonGenerator jGen) throws IOException, JsonProcessingException{
	OFPortStatsReply portReply = portReplies.get(0); // we will get only one PortReply and it will contains many OFPortStatsEntry ?
	jGen.writeStringField("version", portReply.getVersion().toString()); //return the enum name
	jGen.writeFieldName("port");
	jGen.writeStartArray();
	for(OFPortStatsEntry entry : portReply.getEntries()) {
		jGen.writeStartObject();
		jGen.writeStringField("portNumber",entry.getPortNo().toString());
		jGen.writeNumberField("receivePackets", entry.getRxPackets().getValue());
		jGen.writeNumberField("transmitPackets", entry.getTxPackets().getValue());
		jGen.writeNumberField("receiveBytes", entry.getRxBytes().getValue());
		jGen.writeNumberField("transmitBytes", entry.getTxBytes().getValue());
		jGen.writeNumberField("receiveDropped", entry.getRxDropped().getValue());
		jGen.writeNumberField("transmitDropped", entry.getTxDropped().getValue());
		jGen.writeNumberField("receiveErrors", entry.getRxErrors().getValue());
		jGen.writeNumberField("transmitErrors", entry.getTxErrors().getValue());
		jGen.writeNumberField("receiveFrameErrors", entry.getRxFrameErr().getValue());
		jGen.writeNumberField("receiveOverrunErrors", entry.getRxOverErr().getValue());
		jGen.writeNumberField("receiveCRCErrors", entry.getRxCrcErr().getValue());
		jGen.writeNumberField("collisions", entry.getCollisions().getValue());
		if (OFVersion.OF_13 == entry.getVersion()) {
			jGen.writeNumberField("durationSec", entry.getDurationSec());
			jGen.writeNumberField("durationNsec", entry.getDurationNsec());
		}
		jGen.writeEndObject();
	}
	jGen.writeEndArray();
}
 

@Test
public void testSerializeMultipleObjects() throws IOException
{
    final Collection<Comment> allComments = new ArrayList<Comment>();
    Comment aComment = new Comment();
    aComment.setContent("<b>There it is</b>");
    allComments.add(aComment);
    aComment = new Comment();
    aComment.setContent("<p>I agree with the author</p>");
    allComments.add(aComment);

    ByteArrayOutputStream out = new ByteArrayOutputStream();

    jsonHelper.withWriter(out, new Writer()
    {
        @Override
        public void writeContents(JsonGenerator generator, ObjectMapper objectMapper)
                    throws JsonGenerationException, JsonMappingException, IOException
        {
            FilterProvider fp = new SimpleFilterProvider().addFilter(
                        JacksonHelper.DEFAULT_FILTER_NAME, new ReturnAllBeanProperties());
            objectMapper.writer(fp).writeValue(generator, allComments);
        }
    });
    assertTrue(out.toString().contains("content\":\"<b>There it is</b>"));
    assertTrue(out.toString().contains("content\":\"<p>I agree with the author</p>"));
}
 

@Override
public void writeIndentation(JsonGenerator jg, int level) throws IOException
{
    jg.writeRaw(eol);
    if (level > 0) { // should we err on negative values (as there's some flaw?)
        level *= charsPerLevel;
        while (level > indents.length) { // unlike to happen but just in case
            jg.writeRaw(indents, 0, indents.length); 
            level -= indents.length;
        }
        jg.writeRaw(indents, 0, level);
    }
}
 

public void serializeActions(Set<OFActionType> actions, JsonGenerator jGen)
        throws IOException, JsonProcessingException {
    if ( null == actions)
        jGen.writeStringField("actions","null");
    else{
        jGen.writeFieldName("actions");
        jGen.writeStartArray();
        for(OFActionType action : actions){
            jGen.writeString(action.toString());
        }
        jGen.writeEndArray();
    }
}
 

@Test
public void customSerializerWithContext() throws IOException {
	final SimpleModule module = new SimpleModule();
	module.addSerializer(TestEntityObject.class, new JsonSerializer<TestEntityObject>() {
		@Override
		public void serialize(
			final TestEntityObject value,
			final JsonGenerator gen,
			final SerializerProvider serializers) throws IOException, JsonProcessingException {
			gen.writeStartObject();
			serializers.defaultSerializeField("test", value.o1, gen);
			gen.writeEndObject();
		}
	});
	final ObjectMapper mapper = new VPackMapper().registerModule(module);
	final TestEntityObject entity = new TestEntityObject();
	final VPackSlice vpack = new VPackSlice(mapper.writeValueAsBytes(entity));
	assertThat(vpack, is(notNullValue()));
	assertThat(vpack.isObject(), is(true));
	{
		final VPackSlice test = vpack.get("test");
		assertThat(test.isObject(), is(true));
		final VPackSlice l1 = test.get("l1");
		assertThat(l1.isInteger(), is(true));
		assertThat(l1.getAsInt(), is(1));
	}
}
 

@Override
public void serialize(NodeDependency dependency, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
    jsonGenerator.writeStartObject();
    jsonGenerator.writeStringField("name", dependency.getName());
    jsonGenerator.writeFieldName("nodeInfo");
    new NodeInfoJsonSerializer().serialize(dependency.getNodeInfo(), jsonGenerator, serializerProvider);
    jsonGenerator.writeEndObject();
}
 

@Test
public void shouldWriteNullIfValueIsUnknown() throws IOException {
    final JsonGenerator jsonGeneratorMock = mock(JsonGenerator.class);
    final SerializerProvider serializerProviderMock = mock(SerializerProvider.class);
    final SystemEventType input = SystemEventType.UNKNOWN;

    systemEventTypeSerializer.serialize(input, jsonGeneratorMock, serializerProviderMock);

    verify(jsonGeneratorMock).writeNull();
}
 

@Test
public void shouldWriteNullIfValueIsUnknown() throws IOException {
    final JsonGenerator jsonGeneratorMock = mock(JsonGenerator.class);
    final SerializerProvider serializerProviderMock = mock(SerializerProvider.class);
    final TradingStatusType input = TradingStatusType.UNKNOWN;

    tradingStatusTypeSerializer.serialize(input, jsonGeneratorMock, serializerProviderMock);

    verify(jsonGeneratorMock).writeNull();
}
 

@Test
public void shouldSerialiseToFullClassNameWhenUnknown() throws IOException, ClassNotFoundException {
    // Given
    SimpleClassNameCache.setUseFullNameForSerialisation(false);
    final SimpleClassSerializer serialiser = new SimpleClassSerializer();
    final JsonGenerator jgen = mock(JsonGenerator.class);
    final Class clazz = UnsignedLong.class;

    // When
    serialiser.serialize(clazz, jgen, null);

    // Then
    verify(jgen).writeString(clazz.getName());
}
 

static void printRepeatedString(List<String> values, JsonGenerator gen) throws IOException {
  int numElements = values.size();
  gen.writeStartArray(numElements);
  for (int i = 0; i < numElements; i++) {
    printString(values.get(i), gen);
  }
  gen.writeEndArray();
}
 

@Override
public void serialize(TableDisplayAlignmentProvider value,
                      JsonGenerator jgen,
                      SerializerProvider provider)
  throws IOException, JsonProcessingException {

  synchronized (value) {
    jgen.writeString(value.getCode());
  }
}
 

@Override
public void serialize(JSONOptions value, JsonGenerator jgen, SerializerProvider provider) throws IOException,
    JsonGenerationException {
  if (value.opaque != null) {
    jgen.writeObject(value.opaque);
  } else {
    jgen.writeTree(value.root);
  }

}
 

@Override
public boolean writeObject(Object obj, JsonGenerator jgen, boolean expand) throws JsonProcessingException, IOException {
  logger.debug("list of maps");
  try {
    // convert this 'on the fly' to a datatable
    @SuppressWarnings("unchecked")
    Collection<Map<?, ?>> co = (Collection<Map<?, ?>>) obj;
    TableDisplay t = new TableDisplay(co,parent);
    jgen.writeObject(t);
    return true;
  } catch(Exception e) {
    return false;
  }
}