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

List of usage examples for com.fasterxml.jackson.core JsonGenerator writeStartObject

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Introduction

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

Prototype

public abstract void writeStartObject() throws IOException, JsonGenerationException;

Source Link

Document

Method for writing starting marker of a JSON Object value (character '{'; plus possible white space decoration if pretty-printing is enabled).

Usage

From source file:gr.abiss.calipso.uischema.serializer.UiSchemaSerializer.java

@Override
public void serialize(UiSchema schema, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonGenerationException {
    try {// w  w w  . j av  a2 s  .  c  o m
        Class domainClass = schema.getDomainClass();

        if (null == domainClass) {
            throw new RuntimeException("formSchema has no domain class set");
        } else {
            // start json
            jgen.writeStartObject();

            // write superclass hint
            ModelResource superResource = (ModelResource) domainClass.getSuperclass()
                    .getAnnotation(ModelResource.class);
            if (superResource != null) {
                jgen.writeFieldName("superPathFragment");
                jgen.writeString(superResource.path());
            }

            // write pathFragment
            ModelResource modelResource = (ModelResource) domainClass.getAnnotation(ModelResource.class);
            jgen.writeFieldName("pathFragment");
            jgen.writeString(modelResource.path());

            // write simple class name
            jgen.writeFieldName("simpleClassName");
            jgen.writeString(domainClass.getSimpleName());

            // start fields
            jgen.writeFieldName("fields");
            jgen.writeStartObject();

            PropertyDescriptor[] descriptors = new PropertyUtilsBean().getPropertyDescriptors(domainClass);

            for (int i = 0; i < descriptors.length; i++) {

                PropertyDescriptor descriptor = descriptors[i];
                String name = descriptor.getName();
                if (!ignoredFieldNames.contains(name)) {
                    String fieldValue = this.getDataType(domainClass, descriptor, name);
                    if (StringUtils.isNotBlank(fieldValue)) {
                        jgen.writeFieldName(name);
                        jgen.writeStartObject();
                        jgen.writeFieldName("fieldType");
                        jgen.writeString(fieldValue);
                        jgen.writeEndObject();
                    }
                }

            }
            // end fields
            jgen.writeEndObject();
            // end json
            jgen.writeEndObject();

        }

    } catch (Exception e) {
        new RuntimeException("Failed serializing form schema", e);
    }
}

From source file:com.github.hateoas.forms.spring.halforms.ValueSuggestSerializer.java

@Override
public void serialize(final ValueSuggest<?> value, final JsonGenerator gen, final SerializerProvider provider)
        throws IOException, JsonProcessingException {

    Iterator<?> iterator = value.getValues().iterator();
    if (!iterator.hasNext()) {
        return;//from   w ww . ja v  a 2 s .c o  m
    }

    if (value.getType() == SuggestType.INTERNAL) {
        directSerializer.serialize(value, gen, provider);
    } else {
        gen.writeStartObject();

        Map<String, Object> curiedMap = mapper.map(value.getValues());

        if (value.getType() == SuggestType.EXTERNAL) {
            String embeddedRel;
            if (!curiedMap.isEmpty()) {
                embeddedRel = curiedMap.keySet().iterator().next();
            } else {
                embeddedRel = relProvider.getCollectionResourceRelFor(iterator.next().getClass());
            }
            gen.writeStringField("embedded", embeddedRel);
        } else {
            gen.writeStringField("href", (String) value.getValues().iterator().next());
        }

        if (value.getTextField() != null) {
            gen.writeStringField("prompt-field", value.getTextField());
        }
        if (value.getValueField() != null) {
            gen.writeStringField("value-field", value.getValueField());
        }
        gen.writeEndObject();
    }

}

From source file:com.baidubce.services.bmr.BmrClient.java

/**
 * Add steps to a BMR cluster./* w ww . j a  v  a  2s .c  om*/
 *
 * @param request containing the ID of target BMR cluster and several steps to be added.
 * @return The response containing a list of IDs of newly added steps.
 */
public AddStepsResponse addSteps(AddStepsRequest request) {
    checkNotNull(request, "request should not be null.");
    checkNotNull(request.getSteps(), "The parameter steps should not be null.");
    checkStringNotEmpty(request.getClusterId(), "The parameter clusterId should not be null or empty string.");

    StringWriter writer = new StringWriter();
    List<StepConfig> steps = request.getSteps();
    try {
        JsonGenerator jsonGenerator = JsonUtils.jsonGeneratorOf(writer);
        jsonGenerator.writeStartObject();
        jsonGenerator.writeArrayFieldStart("steps");
        for (StepConfig step : steps) {
            jsonGenerator.writeStartObject();
            if (step.getName() != null) {
                jsonGenerator.writeStringField("name", step.getName());
            }
            jsonGenerator.writeStringField("type", step.getType());
            jsonGenerator.writeStringField("actionOnFailure", step.getActionOnFailure());
            jsonGenerator.writeObjectFieldStart("properties");
            for (String propertyKey : step.getProperties().keySet()) {
                jsonGenerator.writeObjectField(propertyKey, step.getProperties().get(propertyKey));
            }
            jsonGenerator.writeEndObject();
            jsonGenerator.writeEndObject();
        }
        jsonGenerator.writeEndArray();
        jsonGenerator.writeEndObject();
        jsonGenerator.close();
    } catch (IOException e) {
        throw new BceClientException("Fail to generate json", e);
    }

    byte[] json = null;
    try {
        json = writer.toString().getBytes(DEFAULT_ENCODING);
    } catch (UnsupportedEncodingException e) {
        throw new BceClientException("Fail to get UTF-8 bytes", e);
    }

    InternalRequest internalRequest = this.createRequest(request, HttpMethodName.POST, CLUSTER,
            request.getClusterId(), STEP);
    internalRequest.addHeader(Headers.CONTENT_LENGTH, String.valueOf(json.length));
    internalRequest.addHeader(Headers.CONTENT_TYPE, "application/json");

    internalRequest.setContent(RestartableInputStream.wrap(json));

    if (request.getClientToken() != null) {
        internalRequest.addParameter("clientToken", request.getClientToken());
    }

    return this.invokeHttpClient(internalRequest, AddStepsResponse.class);
}

From source file:com.basho.riak.client.query.MapReduce.java

/**
 * @param jg//from ww w . j a v  a2 s .  c o  m
 */
private void writeMapReducePhases(JsonGenerator jg) throws IOException {
    int cnt = 0;
    synchronized (phases) {
        final int lastPhase = phases.size();
        for (MapReducePhase phase : phases) {
            cnt++;
            jg.writeStartObject();
            jg.writeFieldName(phase.getType().toString());
            jg.writeStartObject();

            switch (phase.getType()) {
            case MAP:
            case REDUCE:
                MapPhase mapPhase = (MapPhase) phase;
                FunctionToJson.newWriter(mapPhase.getPhaseFunction(), jg).write();
                if (mapPhase.getArg() != null) {
                    jg.writeObjectField("arg", mapPhase.getArg());
                }
                break;
            case LINK:
                jg.writeStringField("bucket", ((LinkPhase) phase).getBucket());
                jg.writeStringField("tag", ((LinkPhase) phase).getTag());
                break;
            }

            //the final phase results should be returned, unless specifically set otherwise
            if (cnt == lastPhase) {
                jg.writeBooleanField("keep", isKeepResult(true, phase.isKeep()));
            } else {
                jg.writeBooleanField("keep", isKeepResult(false, phase.isKeep()));
            }

            jg.writeEndObject();
            jg.writeEndObject();
        }
    }
}

From source file:org.h2gis.drivers.geojson.GeoJsonWriteDriver.java

/**
 * Write a GeoJSON feature./*from  www .  j a va  2  s .c o m*/
 *
 * Features in GeoJSON contain a geometry object and additional properties,
 * and a feature collection represents a list of features.
 *
 * A complete GeoJSON data structure is always an object (in JSON terms). In
 * GeoJSON, an object consists of a collection of name/value pairs -- also
 * called members. For each member, the name is always a string. Member
 * values are either a string, number, object, array or one of the literals:
 * true, false, and null. An array consists of elements where each element
 * is a value as described above.
 *
 * Syntax:
 *
 * { "type": "Feature", "geometry":{"type": "Point", "coordinates": [102.0,
 * 0.5]}, "properties": {"prop0": "value0"} }
 *
 * @param writer
 * @param resultSetMetaData
 * @param geoFieldIndex
 */
private void writeFeature(JsonGenerator jsonGenerator, ResultSet rs, int geoFieldIndex)
        throws IOException, SQLException {
    // feature header
    jsonGenerator.writeStartObject();
    jsonGenerator.writeStringField("type", "Feature");
    //Write the first geometry
    writeGeometry((Geometry) rs.getObject(geoFieldIndex), jsonGenerator);
    //Write the properties
    writeProperties(jsonGenerator, rs);
    // feature footer
    jsonGenerator.writeEndObject();
}

From source file:org.lambdamatic.internal.elasticsearch.codec.BooleanQuerySerializer.java

@Override
public void serialize(final BooleanQuery booleanQuery, final JsonGenerator generator,
        final SerializerProvider serializers) throws IOException, JsonProcessingException {
    // if the booleanQuery does not contain other boolean queries in its elements, just write the
    // elements as an array
    if (!containsBooleanQueries(booleanQuery)) {
        generator.writeStartArray();/*  w w w. ja  va 2  s . c o  m*/
        for (Query query : booleanQuery.getQueries()) {
            generator.writeObject(query);
        }
        generator.writeEndArray();
    } else {
        // otherwise...
        generator.writeStartObject();
        generator.writeObjectFieldStart("bool");
        switch (booleanQuery.getType()) {
        case AND:
            // TODO: also support 'must_not' if the query is inverted.
            generator.writeArrayFieldStart("must");
            for (Query query : booleanQuery.getQueries()) {
                generator.writeObject(query);
            }
            generator.writeEndArray(); // end of 'must'
            break;
        case OR:
            generator.writeArrayFieldStart("should");
            for (Query query : booleanQuery.getQueries()) {
                generator.writeObject(query);
            }
            generator.writeEndArray();// end of 'should'
            break;
        default:
            throw new CodecException("Unexpected boolean type:" + booleanQuery.getType());
        }
        generator.writeEndObject(); // end of 'bool'
        generator.writeEndObject(); // end of root
    }
}

From source file:org.elasticsearch.metrics.ElasticsearchReporter.java

/**
 * This index template is automatically applied to all indices which start with the index name
 * The index template simply configures the name not to be analyzed
 *///from  w  w w.  j a  va2s.co  m
private void checkForIndexTemplate() {
    try {
        HttpURLConnection connection = openConnection("/_template/metrics_template", "HEAD");
        if (connection == null) {
            LOGGER.error("Could not connect to any configured elasticsearch instances: {}",
                    Arrays.asList(hosts));
            return;
        }
        connection.disconnect();

        boolean isTemplateMissing = connection.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND;

        // nothing there, lets create it
        if (isTemplateMissing) {
            LOGGER.debug("No metrics template found in elasticsearch. Adding...");
            HttpURLConnection putTemplateConnection = openConnection("/_template/metrics_template", "PUT");
            if (putTemplateConnection == null) {
                LOGGER.error("Error adding metrics template to elasticsearch");
                return;
            }

            JsonGenerator json = new JsonFactory().createGenerator(putTemplateConnection.getOutputStream());
            json.writeStartObject();
            json.writeStringField("template", index + "*");
            json.writeObjectFieldStart("mappings");

            json.writeObjectFieldStart("_default_");
            json.writeObjectFieldStart("_all");
            json.writeBooleanField("enabled", false);
            json.writeEndObject();
            json.writeObjectFieldStart("properties");
            json.writeObjectFieldStart("name");
            json.writeObjectField("type", "string");
            json.writeObjectField("index", "not_analyzed");
            json.writeEndObject();
            json.writeEndObject();
            json.writeEndObject();

            json.writeEndObject();
            json.writeEndObject();
            json.flush();

            putTemplateConnection.disconnect();
            if (putTemplateConnection.getResponseCode() != 200) {
                LOGGER.error(
                        "Error adding metrics template to elasticsearch: {}/{}"
                                + putTemplateConnection.getResponseCode(),
                        putTemplateConnection.getResponseMessage());
            }
        }
        checkedForIndexTemplate = true;
    } catch (IOException e) {
        LOGGER.error("Error when checking/adding metrics template to elasticsearch", e);
    }
}

From source file:com.oneops.metrics.es.ElasticsearchReporter.java

/**
 * This index template is automatically applied to all indices which start with the index name
 * The index template simply configures the name not to be analyzed
 *///from  www. java2  s . c om
private void checkForIndexTemplate() {
    try {
        HttpURLConnection connection = openConnection("/_template/metrics_template", "HEAD");
        if (connection == null) {
            LOGGER.error("Could not connect to any configured elasticsearch instances: {}",
                    Arrays.asList(hosts));
            return;
        }
        connection.disconnect();

        boolean isTemplateMissing = connection.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND;

        // nothing there, lets create it
        if (isTemplateMissing) {
            LOGGER.debug("No metrics template found in elasticsearch. Adding...");
            HttpURLConnection putTemplateConnection = openConnection("/_template/metrics_template", "PUT");
            JsonGenerator json = new JsonFactory().createGenerator(putTemplateConnection.getOutputStream());
            json.writeStartObject();
            json.writeStringField("template", index + "*");
            json.writeObjectFieldStart("mappings");

            json.writeObjectFieldStart("_default_");
            json.writeObjectFieldStart("_all");
            json.writeBooleanField("enabled", false);
            json.writeEndObject();
            json.writeObjectFieldStart("properties");
            json.writeObjectFieldStart("name");
            json.writeObjectField("type", "string");
            json.writeObjectField("index", "not_analyzed");
            json.writeEndObject();
            json.writeEndObject();
            json.writeEndObject();

            json.writeEndObject();
            json.writeEndObject();
            json.flush();

            putTemplateConnection.disconnect();
            if (putTemplateConnection.getResponseCode() != 200) {
                LOGGER.error(
                        "Error adding metrics template to elasticsearch: {}/{}"
                                + putTemplateConnection.getResponseCode(),
                        putTemplateConnection.getResponseMessage());
            }
        }
        checkedForIndexTemplate = true;
    } catch (IOException e) {
        LOGGER.error("Error when checking/adding metrics template to elasticsearch", e);
    }
}

From source file:com.attribyte.essem.model.StoredGraph.java

/**
 * Generates JSON for this key./*from  www  . j  av a  2  s .  co  m*/
 * @param generator The generator.
 * @throws java.io.IOException on generation error.
 */
public void generateJSON(final JsonGenerator generator) throws IOException {
    generator.writeStartObject();
    generator.writeStringField("id", id);
    generator.writeStringField("uid", uid);
    generator.writeStringField("index", index);
    generator.writeStringField("application", key.application);
    generator.writeStringField("host", key.host);
    generator.writeStringField("instance", key.instance);
    generator.writeStringField("name", key.name);
    generator.writeStringField("field", key.field);
    generator.writeStringField("range", range);
    generator.writeNumberField("startTimestamp", startTimestamp);
    generator.writeNumberField("endTimestamp", endTimestamp);
    generator.writeStringField("downsampleFn", downsampleFn);
    if (rateUnit != null)
        generator.writeStringField("rateUnit", rateUnit);
    generator.writeStringField("title", title);
    generator.writeStringField("description", description);
    generator.writeStringField("xLabel", xLabel);
    generator.writeStringField("yLabel", yLabel);

    generator.writeArrayFieldStart("tag");
    for (String tag : tags) {
        generator.writeString(tag);
    }
    generator.writeEndArray();

    generator.writeStringField("created", DateTime.standardFormat(this.createTime));
    generator.writeEndObject();
}