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

Introduction

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

Prototype

public abstract void writeNull() throws IOException, JsonGenerationException;

Source Link

Document

Method for outputting literal Json null value.

Usage

From source file:data.DefaultExchanger.java

protected void putTimestamp(JsonGenerator generator, String fieldName, ResultSet rs, short index)
        throws SQLException, IOException {
    generator.writeFieldName(fieldName);
    Timestamp timestamp = rs.getTimestamp(index);
    if (timestamp == null) {
        generator.writeNull();
    } else {//from   w  w  w  .j a va 2  s .  co  m
        generator.writeNumber(timestamp.getTime());
    }
}

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From source file:data.DefaultExchanger.java

protected void putClob(JsonGenerator generator, String fieldName, ResultSet rs, short index)
        throws SQLException, IOException {
    generator.writeFieldName(fieldName);
    String clobString = clobString(rs.getClob(index));
    if (clobString == null) {
        generator.writeNull();
    } else {/*from   ww w. jav  a2s  . co  m*/
        generator.writeString(clobString);
    }
}

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From source file:com.cedarsoft.serialization.jackson.AbstractJacksonSerializer.java

public <T> void serialize(@Nullable T object, @Nonnull Class<T> type, @Nonnull String propertyName,
        @Nonnull JsonGenerator serializeTo, @Nonnull Version formatVersion)
        throws JsonProcessingException, IOException {
    serializeTo.writeFieldName(propertyName);

    //Fast exit if the value is null
    if (object == null) {
        serializeTo.writeNull();
        return;/*from w  ww . j  av  a2s . c  o  m*/
    }

    JacksonSerializer<? super T> serializer = getSerializer(type);
    Version delegateVersion = delegatesMappings.getVersionMappings().resolveVersion(type, formatVersion);
    if (serializer.isObjectType()) {
        serializeTo.writeStartObject();
    }

    serializer.serialize(serializeTo, object, delegateVersion);

    if (serializer.isObjectType()) {
        serializeTo.writeEndObject();
    }
}

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From source file:org.mycontroller.standalone.api.jaxrs.mixins.serializers.SensorVariableInfoSerializer.java

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

    if (sensorVariable != null) {
        ResourceModel resourceModel = new ResourceModel(RESOURCE_TYPE.SENSOR_VARIABLE, sensorVariable.getId());
        jgen.writeStartObject();//from w ww  .j a  v a 2s .  c  om
        provider.defaultSerializeField("id", sensorVariable.getId(), jgen);
        provider.defaultSerializeField("name", resourceModel.getResourceLessDetails(), jgen);
        provider.defaultSerializeField("type", sensorVariable.getVariableType().getText(), jgen);
        jgen.writeEndObject();
    } else {
        jgen.writeNull();
    }

}

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From source file:org.mycontroller.standalone.api.jaxrs.mixins.serializers.SensorVariablesSerializer.java

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

    if (id != null) {
        List<SensorVariable> sensorVariables = DaoUtils.getSensorVariableDao().getAllBySensorId(id);

        //Sort by defined order
        Collections.sort(sensorVariables, new ComparatorSensorVariable());

        List<SensorVariableJson> variables = new ArrayList<SensorVariableJson>();
        for (SensorVariable sensorVariable : sensorVariables) {
            variables.add(new SensorVariableJson(sensorVariable));
        }//from   w  ww . java2s.c o  m
        jgen.writeObject(variables);
    } else {
        jgen.writeNull();
    }

}

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From source file:com.cedarsoft.couchdb.io.RowSerializer.java

public <K, V, D> void serialize(@Nonnull Row<K, V, D> row, @Nonnull JacksonSerializer<? super K> keySerializer,
        @Nonnull JacksonSerializer<? super V> valueSerializer,
        @Nullable JacksonSerializer<? super D> documentSerializer, @Nonnull JsonGenerator generator)
        throws IOException {
    generator.writeStartObject();/*from   w  ww  .j  av a2  s .  c om*/

    @Nullable
    DocId id = row.getId();
    if (id != null) {
        generator.writeStringField(PROPERTY_ID, id.asString());
    }

    //The key
    generator.writeFieldName(PROPERTY_KEY);
    keySerializer.serialize(row.getKey(), generator);

    //The Value
    generator.writeFieldName(PROPERTY_VALUE);
    V value = row.getValue();
    if (value == null) {
        generator.writeNull();
    } else {
        valueSerializer.serialize(value, generator);
    }

    //The doc
    CouchDoc<? extends D> doc = row.getDoc();
    if (doc != null) {
        if (documentSerializer == null) {
            throw new NullPointerException("documentSerializer must not be null when serializing a doc");
        }

        generator.writeFieldName("doc");
        couchDocSerializer.serialize(doc, documentSerializer, generator);
    }

    generator.writeEndObject();
}

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From source file:com.cedarsoft.serialization.serializers.jackson.LicenseSerializer.java

@Override
public void serialize(@Nonnull JsonGenerator serializeTo, @Nonnull License object,
        @Nonnull Version formatVersion) throws IOException, JsonProcessingException {
    verifyVersionReadable(formatVersion);

    if (object instanceof CreativeCommonsLicense) {
        serializeTo.writeStringField(PROPERTY_SUB_TYPE, SUB_TYPE_CC);
    }//from   w ww .  jav a 2  s .c  om

    //id
    serializeTo.writeStringField(PROPERTY_ID, object.getId());
    //name
    serializeTo.writeStringField(PROPERTY_NAME, object.getName());

    //URL
    serializeTo.writeFieldName(PROPERTY_URL);
    URL url = object.getUrl();
    if (url == null) {
        serializeTo.writeNull();
    } else {
        serializeTo.writeString(url.toString());
    }
}

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From source file:org.gvnix.web.json.BindingResultSerializer.java

/**
 * {@inheritDoc}// w  w w  .j  a  va 2 s.  c o  m
 */
@Override
public void serialize(Object value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonProcessingException {

    try {
        // Cast to BindingResult
        BindingResult result = (BindingResult) value;

        // Create the result map
        Map<String, Object> allErrorsMessages = new HashMap<String, Object>();

        // Get field errors
        List<FieldError> fieldErrors = result.getFieldErrors();
        if (fieldErrors.isEmpty()) {
            // Nothing to do
            jgen.writeNull();
            return;
        }

        // Check if target type is an array or a bean
        @SuppressWarnings("rawtypes")
        Class targetClass = result.getTarget().getClass();
        if (targetClass.isArray() || Collection.class.isAssignableFrom(targetClass)) {
            loadListErrors(result.getFieldErrors(), allErrorsMessages);
        } else {
            loadObjectErrors(result.getFieldErrors(), allErrorsMessages);
        }

        jgen.writeObject(allErrorsMessages);
    } catch (JsonProcessingException e) {
        LOGGER.warn(ERROR_WRITTING_BINDING, e);
        throw e;
    } catch (IOException e) {
        LOGGER.warn(ERROR_WRITTING_BINDING, e);
        throw e;
    } catch (Exception e) {
        LOGGER.warn(ERROR_WRITTING_BINDING, e);
        throw new IOException(ERROR_WRITTING_BINDING, e);
    }

}

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From source file:javaslang.jackson.datatype.serialize.EitherSerializer.java

private void write(Object val, int containedTypeIndex, JsonGenerator gen, SerializerProvider provider)
        throws IOException {
    if (val != null) {
        if (type.containedTypeCount() > containedTypeIndex) {
            JsonSerializer<Object> ser;
            JavaType containedType = type.containedType(containedTypeIndex);
            if (containedType.getRawClass() != Object.class) {
                ser = provider.findTypedValueSerializer(type.containedType(containedTypeIndex), true, null);
            } else {
                ser = provider.findTypedValueSerializer(val.getClass(), true, null);
            }/*from   w w  w  . java  2 s  . co m*/
            ser.serialize(val, gen, provider);
        } else {
            gen.writeObject(val);
        }
    } else {
        gen.writeNull();
    }
}

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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  ww. j ava2 s.c om

        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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