Example usage for com.fasterxml.jackson.core JsonFactory createGenerator

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonFactory createGenerator.

Prototype

public JsonGenerator createGenerator(Writer out) throws IOException 

Source Link

Document

Method for constructing JSON generator for writing JSON content using specified Writer.

Usage

From source file:ch.rasc.wampspring.message.PublishMessage.java

@Override
public String toJson(JsonFactory jsonFactory) throws IOException {
    try (StringWriter sw = new StringWriter(); JsonGenerator jg = jsonFactory.createGenerator(sw)) {
        jg.writeStartArray();//from w  w w. j a v  a 2s  .  c om
        jg.writeNumber(getTypeId());
        jg.writeString(getTopicURI());

        jg.writeObject(this.event);
        if (this.excludeMe != null && this.excludeMe) {
            jg.writeBoolean(true);
        } else if (this.exclude != null) {
            jg.writeObject(this.exclude);
            if (this.eligible != null) {
                jg.writeObject(this.eligible);
            }
        }

        jg.writeEndArray();
        jg.close();
        return sw.toString();
    }
}

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From source file:com.messagehub.samples.servlet.MessageList.java

/**
 * Build message list dependent on the format Message Hub requires. The
 * message list is in the form: [{ "value": base_64_string }, ...]
 *
 * @return {String} String representation of a JSON object.
 * @throws IOException/*from  w  w  w  . j av a 2 s  .  co m*/
 */
public String build() throws IOException {
    final JsonFactory jsonFactory = new JsonFactory();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    JsonGenerator jsonGenerator = null;

    jsonGenerator = jsonFactory.createGenerator(outputStream);

    jsonGenerator.writeStartArray();

    // Write each message as a JSON object in
    // the form:
    // { "value": base_64_string }
    for (int i = 0; i < this.messages.size(); i++) {
        jsonGenerator.writeStartObject();
        jsonGenerator.writeFieldName("value");
        jsonGenerator.writeObject(this.messages.get(i));
        jsonGenerator.writeEndObject();
    }

    jsonGenerator.writeEndArray();

    // Close underlying streams and return string representation.
    jsonGenerator.close();
    outputStream.close();

    return new String(outputStream.toByteArray());
}

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From source file:com.example.MessageList.java

/**
 * Build message list dependent on the format Message Hub requires. The
 * message list is in the form: [{ "value": base_64_string }, ...]
 * /*from   w ww .j  a  v a2 s  .c o m*/
 * @return {String} String representation of a JSON object.
 * @throws IOException
 */
public String build() throws IOException {
    final JsonFactory jsonFactory = new JsonFactory();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    JsonGenerator jsonGenerator = null;

    jsonGenerator = jsonFactory.createGenerator(outputStream);

    // [
    jsonGenerator.writeStartArray();

    // Write each message as a JSON object in
    // the form:
    // { "value": base_64_string }
    for (int i = 0; i < this.messages.size(); i++) {
        jsonGenerator.writeStartObject();
        jsonGenerator.writeFieldName("value");
        jsonGenerator.writeObject(this.messages.get(i));
        jsonGenerator.writeEndObject();
    }

    // ]
    jsonGenerator.writeEndArray();

    // Close underlying streams and return string representation.
    jsonGenerator.close();
    outputStream.close();

    return new String(outputStream.toByteArray());
}

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From source file:com.github.jonpeterson.jackson.module.versioning.VersionedModelSerializer.java

private void doSerialize(T value, JsonGenerator generator, SerializerProvider provider,
        TypeSerializer typeSerializer) throws IOException {
    // serialize the value into a byte array buffer then parse it back out into a JsonNode tree
    // TODO: find a better way to convert the value into a tree
    JsonFactory factory = generator.getCodec().getFactory();
    ByteArrayOutputStream buffer = new ByteArrayOutputStream(4096);
    JsonGenerator bufferGenerator = factory.createGenerator(buffer);
    try {//from  w  w  w  . j a  va  2s .  c o m
        if (typeSerializer != null)
            delegate.serializeWithType(value, bufferGenerator, provider, typeSerializer);
        else
            delegate.serialize(value, bufferGenerator, provider);
    } finally {
        bufferGenerator.close();
    }

    ObjectNode modelData = factory.createParser(buffer.toByteArray()).readValueAsTree();

    // set target version to @SerializeToVersion's value, @JsonVersionModel's defaultSerializeToVersion, or
    //   @JsonVersionModel's currentVersion in that order
    String targetVersion = null;
    if (serializeToVersionProperty != null) {
        targetVersion = (String) serializeToVersionProperty.getAccessor().getValue(value);
        modelData.remove(serializeToVersionProperty.getName());
    }
    if (targetVersion == null)
        targetVersion = jsonVersionedModel.defaultSerializeToVersion();
    if (targetVersion.isEmpty())
        targetVersion = jsonVersionedModel.currentVersion();

    // convert model data if there is a converter and targetVersion is different than the currentVersion or if
    //   alwaysConvert is true
    if (converter != null && (jsonVersionedModel.alwaysConvert()
            || !targetVersion.equals(jsonVersionedModel.currentVersion())))
        modelData = converter.convert(modelData, jsonVersionedModel.currentVersion(), targetVersion,
                JsonNodeFactory.instance);

    // add target version to model data if it wasn't the version to suppress
    if (!targetVersion.equals(jsonVersionedModel.versionToSuppressPropertySerialization()))
        modelData.put(jsonVersionedModel.propertyName(), targetVersion);

    // write node
    generator.writeTree(modelData);
}

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From source file:org.cloudcoder.dataanalysis.ProgsnapExport.java

private String encodeLine(String tagname, Object value) throws IOException {
    StringWriter sw = new StringWriter();
    JsonFactory factory = new JsonFactory();
    JsonGenerator jg = factory.createGenerator(sw);
    jg.writeStartObject();//from w w  w .j a  v a 2s. c  o m
    jg.writeStringField("tag", tagname);
    jg.writeFieldName("value");
    writeJsonFieldValue(jg, value);
    jg.writeEndObject();
    jg.close();
    return sw.toString();
}

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From source file:org.zalando.logbook.JsonHttpLogFormatter.java

private String compactJson(final String json) throws IOException {
    if (isAlreadyCompacted(json)) {
        return json;
    }/*from  ww  w.j  ava2 s  . c  o  m*/

    final StringWriter output = new StringWriter();
    final JsonFactory factory = mapper.getFactory();
    final JsonParser parser = factory.createParser(json);

    final JsonGenerator generator = factory.createGenerator(output);

    // https://github.com/jacoco/jacoco/wiki/FilteringOptions
    //noinspection TryFinallyCanBeTryWithResources - jacoco can't handle try-with correctly
    try {
        while (parser.nextToken() != null) {
            generator.copyCurrentEvent(parser);
        }
    } finally {
        generator.close();
    }

    return output.toString();
}

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From source file:com.joliciel.jochre.search.highlight.Snippet.java

public String toJson() {
    try {/* ww w  .  j a v a2  s  . c  o m*/
        DecimalFormatSymbols enSymbols = new DecimalFormatSymbols(Locale.US);
        DecimalFormat df = new DecimalFormat("0.00", enSymbols);
        StringWriter writer = new StringWriter();
        JsonFactory jsonFactory = new JsonFactory();
        JsonGenerator jsonGen = jsonFactory.createGenerator(writer);
        this.toJson(jsonGen, df);
        writer.flush();
        String json = writer.toString();
        return json;
    } catch (IOException ioe) {
        LogUtils.logError(LOG, ioe);
        throw new RuntimeException(ioe);
    }
}

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From source file:com.crossover.trial.weather.domain.AirportTest.java

@Test
public void testSerialization() throws IOException {
    JsonFactory jsonFactory = new MappingJsonFactory();
    Airport airport = new Airport.Builder().withIata("aaa").withLatitude(10).withLongitude(20).build();

    StringWriter out = new StringWriter();
    JsonGenerator json = jsonFactory.createGenerator(out);
    json.writeObject(airport);//www .  j a v a 2s  .co  m
    json.close();

    assertThat(out.toString(), equalTo("{\"iata\":\"AAA\",\"latitude\":10.0,\"longitude\":20.0}"));
}

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From source file:org.graylog.plugins.nats.output.AbstractGelfNatsOutput.java

protected byte[] toGELFMessage(final Message message) throws IOException {
    final HashMap<String, Object> fields = new HashMap<>(message.getFields());

    final ByteArrayOutputStream outputStream = new ByteArrayOutputStream(512);
    final JsonFactory jsonFactory = new JsonFactory();
    final JsonGenerator generator = jsonFactory.createGenerator(outputStream);
    generator.writeStartObject();/*  w ww .  jav a 2 s . com*/
    generator.writeStringField("version", "1.1");
    generator.writeStringField("host", (String) fields.remove(Message.FIELD_SOURCE));
    generator.writeStringField("short_message", (String) fields.remove(Message.FIELD_MESSAGE));

    final String fullMessage = (String) fields.remove(Message.FIELD_FULL_MESSAGE);
    if (fullMessage != null) {
        generator.writeStringField("full_message", fullMessage);
    }

    final Object fieldTimeStamp = fields.remove(Message.FIELD_TIMESTAMP);
    final DateTime timestamp;
    if (fieldTimeStamp instanceof DateTime) {
        timestamp = (DateTime) fieldTimeStamp;
    } else {
        timestamp = Tools.nowUTC();
    }
    generator.writeNumberField("timestamp", timestamp.getMillis() / 1000d);

    final Object fieldLevel = fields.remove(Message.FIELD_TIMESTAMP);
    final Integer level = extractLevel(fieldLevel);
    if (level != null) {
        generator.writeNumberField("level", level);
    }

    for (Map.Entry<String, Object> field : fields.entrySet()) {
        final String key = field.getKey();
        final Object value = field.getValue();

        if (value instanceof String) {
            generator.writeStringField(key, (String) value);
        } else if (value instanceof Boolean) {
            generator.writeBooleanField(key, (Boolean) value);
        } else if (value instanceof Integer) {
            generator.writeNumberField(key, (Integer) value);
        } else if (value instanceof Long) {
            generator.writeNumberField(key, (Long) value);
        } else if (value instanceof Float) {
            generator.writeNumberField(key, (Float) value);
        } else if (value instanceof Double) {
            generator.writeNumberField(key, (Double) value);
        } else if (value instanceof BigDecimal) {
            generator.writeNumberField(key, (BigDecimal) value);
        } else if (value == null) {
            generator.writeNullField(key);
        }
    }

    generator.writeStringField("_forwarder_cluster_id", clusterId);
    generator.writeStringField("_forwarder_node_id", nodeId);

    generator.writeEndObject();

    generator.flush();

    return outputStream.toByteArray();
}

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From source file:org.eclipse.winery.repository.resources.servicetemplates.boundarydefinitions.interfaces.ExportedOperationResource.java

@GET
@Produces(MediaType.APPLICATION_JSON)/*from  ww w.  j av  a2s.  co  m*/
public Response getJSON() {
    JsonFactory jsonFactory = new JsonFactory();
    StringWriter sw = new StringWriter();
    try {
        JsonGenerator jg = jsonFactory.createGenerator(sw);
        jg.writeStartObject();
        String type = this.getType();
        jg.writeStringField("type", type);
        jg.writeStringField("ref", this.getReference());
        if ((type != null) && (!type.equals("Plan"))) {
            jg.writeStringField("interfacename", this.getInterfaceName());
            jg.writeStringField("operationname", this.getOperationName());
        }
        jg.writeEndObject();
        jg.close();
    } catch (Exception e) {
        ExportedOperationResource.LOGGER.error(e.getMessage(), e);
        throw new WebApplicationException(Response.status(Status.INTERNAL_SERVER_ERROR).entity(e).build());
    }
    return Response.ok(sw.toString()).build();
}

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