Example usage for com.fasterxml.jackson.core JsonGenerator writeObject

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonGenerator writeObject.

Prototype

public abstract void writeObject(Object pojo) throws IOException, JsonProcessingException;

Source Link

Document

Method for writing given Java object (POJO) as Json.

Usage

From source file:com.cloudera.exhibit.server.json.FrameSerializer.java

@Override
public void serialize(Frame res, JsonGenerator gen, SerializerProvider provider) throws IOException {
    gen.writeStartObject();// w w  w . ja  va 2s  . c o m
    gen.writeArrayFieldStart("columns");
    for (int i = 0; i < res.descriptor().size(); i++) {
        gen.writeString(res.descriptor().get(i).name);
    }
    gen.writeEndArray();

    gen.writeArrayFieldStart("data");
    for (Obs obs : res) {
        gen.writeStartArray();
        for (int i = 0; i < res.descriptor().size(); i++) {
            gen.writeObject(obs.get(i));
        }
        gen.writeEndArray();
    }
    gen.writeEndArray();
    gen.writeEndObject();
}

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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  w  w.  j a  v a2s  . 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:org.springframework.data.elasticsearch.core.DefaultResultMapper.java

private String buildJSONFromFields(Collection<SearchHitField> values) {
    JsonFactory nodeFactory = new JsonFactory();
    try {/*from   w w w  . jav a2  s  . c  o m*/
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        JsonGenerator generator = nodeFactory.createGenerator(stream, JsonEncoding.UTF8);
        generator.writeStartObject();
        for (SearchHitField value : values) {
            if (value.getValues().size() > 1) {
                generator.writeArrayFieldStart(value.getName());
                for (Object val : value.getValues()) {
                    generator.writeObject(val);
                }
                generator.writeEndArray();
            } else {
                generator.writeObjectField(value.getName(), value.getValue());
            }
        }
        generator.writeEndObject();
        generator.flush();
        return new String(stream.toByteArray(), Charset.forName("UTF-8"));
    } catch (IOException e) {
        return null;
    }
}

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From source file:com.strategicgains.hyperexpress.serialization.siren.jackson.SirenResourceSerializer.java

private void writeLinks(SirenResource resource, JsonGenerator jgen)
        throws JsonGenerationException, IOException {
    List<Link> links = resource.getLinks();

    if (links.isEmpty())
        return;/* ww  w .  j a  v a  2 s. c o m*/

    jgen.writeArrayFieldStart(LINKS);
    Map<String, SirenLink> linksByRel = indexLinksByHref(resource.getLinks());

    for (SirenLink link : linksByRel.values()) {
        jgen.writeObject(link);
    }

    jgen.writeEndArray();
}

---

From source file:io.gravitee.definition.jackson.datatype.api.ser.ProxySerializer.java

@Override
public void serialize(Proxy proxy, JsonGenerator jgen, SerializerProvider provider) throws IOException {
    jgen.writeStartObject();//  w  w  w  . ja  v a2  s  .c  o  m
    jgen.writeStringField("context_path", proxy.getContextPath());
    jgen.writeBooleanField("strip_context_path", proxy.isStripContextPath());
    jgen.writeBooleanField("dumpRequest", proxy.isDumpRequest());

    final List<Endpoint> endpoints = proxy.getEndpoints();

    jgen.writeArrayFieldStart("endpoints");
    endpoints.forEach(endpoint -> {
        try {
            jgen.writeObject(endpoint);
        } catch (IOException e) {
            e.printStackTrace();
        }
    });
    jgen.writeEndArray();

    if (proxy.getLoadBalancer() != null) {
        jgen.writeObjectField("load_balancing", proxy.getLoadBalancer());
    }

    if (proxy.getFailover() != null) {
        jgen.writeObjectField("failover", proxy.getFailover());
    }

    jgen.writeEndObject();
}

---

From source file:com.microsoft.rest.serializer.HeadersSerializer.java

@Override
public void serialize(Headers value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
    Map<String, Object> headers = new HashMap<String, Object>();
    for (Map.Entry<String, List<String>> entry : value.toMultimap().entrySet()) {
        if (entry.getValue() != null && entry.getValue().size() == 1) {
            headers.put(entry.getKey(), entry.getValue().get(0));
        } else if (entry.getValue() != null && entry.getValue().size() > 1) {
            headers.put(entry.getKey(), entry.getValue());
        }//from w w  w. jav a  2s.  c om
    }
    jgen.writeObject(headers);
}

---

From source file:org.pentaho.metaverse.impl.model.kettle.json.AbstractMetaJsonSerializer.java

protected void serializeParameters(T meta, JsonGenerator json) throws IOException {
    json.writeArrayFieldStart(JSON_PROPERTY_PARAMETERS);
    String[] parameters = meta.listParameters();
    if (parameters != null) {
        for (String param : parameters) {
            try {
                ParamInfo paramInfo = new ParamInfo(param, null, meta.getParameterDefault(param),
                        meta.getParameterDescription(param));
                json.writeObject(paramInfo);
            } catch (UnknownParamException e) {
                LOGGER.warn(Messages.getString("WARNING.Serialization.Trans.Param", param), e);
            }/*from  w w  w. ja v  a2s. c o m*/
        }
    }
    json.writeEndArray();
}

---

From source file:de.fraunhofer.iosb.ilt.sta.serialize.EntitySetResultSerializer.java

@Override
public void serialize(EntitySetResult value, JsonGenerator gen, SerializerProvider serializers)
        throws IOException, JsonProcessingException {
    gen.writeStartObject();/*  ww  w.  ja  v a2  s.  co  m*/
    long count = value.getValues().getCount();
    if (count >= 0) {
        gen.writeNumberField("@iot.count", count);
    }
    String nextLink = value.getValues().getNextLink();
    if (nextLink != null) {
        gen.writeStringField("@iot.nextLink", nextLink);
    }

    // TODO begin/end array, iterate over content
    gen.writeFieldName("value");
    gen.writeObject(value.getValues());
    gen.writeEndObject();
}

---

From source file:models.GroupSerializer.java

@Override
public void serialize(Group group, JsonGenerator jgen, SerializerProvider provider) throws IOException {
    jgen.writeStartObject();//from  w  w  w. java 2s.c  o m
    jgen.writeStringField("id", group.getId());
    jgen.writeStringField("comment", parseReferencesInComment(group));
    jgen.writeStringField("label", group.getLabel());
    jgen.writeFieldName("unit");
    jgen.writeObject(group.getUnit());
    jgen.writeFieldName("type");
    jgen.writeObject(group.getType());

    jgen.writeFieldName("commonKeywords");
    jgen.writeObject(group.getCommonKeywords());

    jgen.writeFieldName("dimensions");
    jgen.writeStartArray();
    for (Dimension dim : group.getDimSet().dimensions) {
        jgen.writeStartObject();
        jgen.writeFieldName("id");
        jgen.writeObject(dim.getId());
        jgen.writeFieldName("keywords");
        jgen.writeObject(dim.keywords);
        jgen.writeFieldName("keywordsPosition");
        jgen.writeObject(dim.keywordsPosition);
        jgen.writeFieldName("orientation");
        jgen.writeObject(group.getDimSet().getDimensionOrientation(dim));
        jgen.writeEndObject();
    }
    jgen.writeEndArray();

    jgen.writeFieldName("overlap");
    jgen.writeStartArray();
    for (Group otherGroup : group.getOverlappingGroups()) {
        jgen.writeStartObject();
        jgen.writeStringField("id", otherGroup.getId());
        jgen.writeStringField("label", otherGroup.getLabel());
        jgen.writeEndObject();
    }
    jgen.writeEndArray();

    jgen.writeFieldName("references");
    jgen.writeStartArray();
    for (Reference ref : group.getReferences()) {
        jgen.writeObject(ref);
    }
    jgen.writeEndArray();

    jgen.writeFieldName("sourceRelations");
    jgen.writeStartArray();
    for (SourceRelation sourceRelation : group.getSourceRelations()) {
        jgen.writeObject(sourceRelation);
    }
    jgen.writeEndArray();

    jgen.writeFieldName("elementsURI");
    jgen.writeStartObject();
    for (SingleElement element : group.getElements()) {
        jgen.writeStringField(StringUtils.join(element.getKeywords(), "+") + "+" + element.getUnit().getId(),
                element.getId());
    }
    jgen.writeEndObject();

    if (group.getType() == Type.COEFFICIENT) {
        jgen.writeFieldName("elementsValue");
        jgen.writeStartObject();
        for (SingleElement element : group.getElements()) {
            Coefficient coeff = (Coefficient) element;
            jgen.writeFieldName(StringUtils.join(element.getKeywords(), "+") + "+" + element.getUnit().getId());
            jgen.writeStartObject();
            jgen.writeNumberField("value", coeff.getValue().value);
            jgen.writeNumberField("uncertainty", coeff.getValue().uncertainty);
            jgen.writeEndObject();
        }
        jgen.writeEndObject();
    } else {
        jgen.writeFieldName("elementsImpactsAndFlows");
        jgen.writeStartObject();
        for (SingleElement element : group.getElements()) {
            Process process = (Process) element;
            jgen.writeFieldName(StringUtils.join(element.getKeywords(), "+") + "+" + element.getUnit().getId());
            jgen.writeStartObject();
            for (ElementaryFlow flow : process.getCalculatedFlows().values()) {
                jgen.writeFieldName(flow.getType().getId());
                jgen.writeStartObject();
                jgen.writeNumberField("value", flow.getValue().value);
                jgen.writeNumberField("uncertainty", flow.getValue().uncertainty);
                jgen.writeEndObject();
            }
            for (Impact impact : process.getImpacts().values()) {
                jgen.writeFieldName(impact.getType().getId());
                jgen.writeStartObject();
                jgen.writeNumberField("value", impact.getValue().value);
                jgen.writeNumberField("uncertainty", impact.getValue().uncertainty);
                jgen.writeEndObject();
            }
            jgen.writeEndObject();
        }
        jgen.writeEndObject();
    }

    jgen.writeEndObject();
}

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From source file:ratpack.codahale.metrics.internal.WebSocketReporter.java

@SuppressWarnings("rawtypes")
private void writeGauges(JsonGenerator json, SortedMap<String, Gauge> gauges) throws IOException {
    json.writeArrayFieldStart("gauges");
    for (Map.Entry<String, Gauge> entry : gauges.entrySet()) {
        Gauge gauge = entry.getValue();/* w w  w .  j a v a  2 s .  c o m*/

        json.writeStartObject();
        json.writeStringField("name", entry.getKey());
        try {
            json.writeFieldName("value");
            json.writeObject(gauge.getValue());
        } catch (Exception e) {
            LOGGER.log(Level.FINE, "Exception encountered while reporting [" + entry.getKey() + "]: "
                    + e.getLocalizedMessage());
            json.writeNull();
        }
        json.writeEndObject();

    }
    json.writeEndArray();
}

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