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

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

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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:org.apache.orc.bench.convert.json.JsonWriter.java

static void printValue(JsonGenerator writer, ColumnVector vector, TypeDescription schema, int row)
        throws IOException {
    if (vector.isRepeating) {
        row = 0;//from w  ww. j av a  2s .co m
    }
    if (vector.noNulls || !vector.isNull[row]) {
        switch (schema.getCategory()) {
        case BOOLEAN:
            writer.writeBoolean(((LongColumnVector) vector).vector[row] != 0);
            break;
        case BYTE:
        case SHORT:
        case INT:
        case LONG:
            writer.writeNumber(((LongColumnVector) vector).vector[row]);
            break;
        case FLOAT:
        case DOUBLE:
            writer.writeNumber(((DoubleColumnVector) vector).vector[row]);
            break;
        case STRING:
        case CHAR:
        case VARCHAR:
            writer.writeString(((BytesColumnVector) vector).toString(row));
            break;
        case BINARY:
            printBinary(writer, (BytesColumnVector) vector, row);
            break;
        case DECIMAL:
            writer.writeString(((DecimalColumnVector) vector).vector[row].toString());
            break;
        case DATE:
            writer.writeString(new DateWritable((int) ((LongColumnVector) vector).vector[row]).toString());
            break;
        case TIMESTAMP:
            writer.writeString(((TimestampColumnVector) vector).asScratchTimestamp(row).toString());
            break;
        case LIST:
            printList(writer, (ListColumnVector) vector, schema, row);
            break;
        case MAP:
            printMap(writer, (MapColumnVector) vector, schema, row);
            break;
        case STRUCT:
            printStruct(writer, (StructColumnVector) vector, schema, row);
            break;
        case UNION:
            printUnion(writer, (UnionColumnVector) vector, schema, row);
            break;
        default:
            throw new IllegalArgumentException("Unknown type " + schema.toString());
        }
    } else {
        writer.writeNull();
    }
}

From source file:com.zenesis.qx.remote.ProxyMethod.java

@Override
public void serialize(JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonProcessingException {
    jgen.writeStartObject();//from w  w  w  .j a v  a  2 s  .c  o m

    // Write the return type
    Class clazz = arrayType != null ? arrayType : method.getReturnType();
    if (Proxied.class.isAssignableFrom(clazz)) {
        ProxyType type = ProxyTypeManager.INSTANCE.getProxyType(clazz);
        jgen.writeObjectField("returnType", type);
    } else if (isMap) {
        jgen.writeBooleanField("map", true);
    }
    if (cacheResult)
        jgen.writeBooleanField("cacheResult", true);
    if (staticMethod)
        jgen.writeBooleanField("staticMethod", true);

    // Whether to wrap the return
    if (array != null)
        jgen.writeObjectField("returnArray", array.toString().toLowerCase());

    // The parameters - if any are Proxied objects, we need to write their class
    Class[] parameters = method.getParameterTypes();
    if (parameters.length > 0) {
        jgen.writeArrayFieldStart("parameters");
        for (int i = 0; i < parameters.length; i++) {
            if (Proxied.class.isAssignableFrom(parameters[i]))
                jgen.writeObject(ProxyTypeManager.INSTANCE.getProxyType(parameters[i]));
            else
                jgen.writeNull();
        }
        jgen.writeEndArray();
    }

    jgen.writeEndObject();
}

From source file:org.oncoblocks.centromere.web.util.FilteringJackson2HttpMessageConverter.java

@Override
protected void writeInternal(Object object, Type type, HttpOutputMessage outputMessage)
        throws IOException, HttpMessageNotWritableException {

    ObjectMapper objectMapper = getObjectMapper();
    JsonGenerator jsonGenerator = objectMapper.getFactory().createGenerator(outputMessage.getBody());

    try {//from  w  w  w  .j av  a  2  s .  com

        if (this.prefixJson) {
            jsonGenerator.writeRaw(")]}', ");
        }

        if (object instanceof ResponseEnvelope) {

            ResponseEnvelope envelope = (ResponseEnvelope) object;
            Object entity = envelope.getEntity();
            Set<String> fieldSet = envelope.getFieldSet();
            Set<String> exclude = envelope.getExclude();
            FilterProvider filters = null;

            if (fieldSet != null && !fieldSet.isEmpty()) {
                if (entity instanceof ResourceSupport) {
                    fieldSet.add("content"); // Don't filter out the wrapped content.
                }
                filters = new SimpleFilterProvider()
                        .addFilter("fieldFilter", SimpleBeanPropertyFilter.filterOutAllExcept(fieldSet))
                        .setFailOnUnknownId(false);
            } else if (exclude != null && !exclude.isEmpty()) {
                filters = new SimpleFilterProvider()
                        .addFilter("fieldFilter", SimpleBeanPropertyFilter.serializeAllExcept(exclude))
                        .setFailOnUnknownId(false);
            } else {
                filters = new SimpleFilterProvider()
                        .addFilter("fieldFilter", SimpleBeanPropertyFilter.serializeAllExcept())
                        .setFailOnUnknownId(false);
            }

            objectMapper.setFilterProvider(filters);
            objectMapper.writeValue(jsonGenerator, entity);

        } else if (object == null) {
            jsonGenerator.writeNull();
        } else {
            FilterProvider filters = new SimpleFilterProvider().setFailOnUnknownId(false);
            objectMapper.setFilterProvider(filters);
            objectMapper.writeValue(jsonGenerator, object);
        }

    } catch (JsonProcessingException e) {
        e.printStackTrace();
        throw new HttpMessageNotWritableException("Could not write JSON: " + e.getMessage());
    }

}

From source file:org.apache.nifi.processors.elasticsearch.PutElasticsearchHttpRecord.java

@SuppressWarnings("unchecked")
private void writeValue(final JsonGenerator generator, final Object value, final String fieldName,
        final DataType dataType) throws IOException {
    if (value == null) {
        generator.writeNull();
        return;/*from  w w  w. j ava  2s. c o  m*/
    }

    final DataType chosenDataType = dataType.getFieldType() == RecordFieldType.CHOICE
            ? DataTypeUtils.chooseDataType(value, (ChoiceDataType) dataType)
            : dataType;
    final Object coercedValue = DataTypeUtils.convertType(value, chosenDataType, fieldName);
    if (coercedValue == null) {
        generator.writeNull();
        return;
    }

    switch (chosenDataType.getFieldType()) {
    case DATE: {
        final String stringValue = DataTypeUtils.toString(coercedValue,
                () -> DataTypeUtils.getDateFormat(RecordFieldType.DATE.getDefaultFormat()));
        if (DataTypeUtils.isLongTypeCompatible(stringValue)) {
            generator.writeNumber(DataTypeUtils.toLong(coercedValue, fieldName));
        } else {
            generator.writeString(stringValue);
        }
        break;
    }
    case TIME: {
        final String stringValue = DataTypeUtils.toString(coercedValue,
                () -> DataTypeUtils.getDateFormat(RecordFieldType.TIME.getDefaultFormat()));
        if (DataTypeUtils.isLongTypeCompatible(stringValue)) {
            generator.writeNumber(DataTypeUtils.toLong(coercedValue, fieldName));
        } else {
            generator.writeString(stringValue);
        }
        break;
    }
    case TIMESTAMP: {
        final String stringValue = DataTypeUtils.toString(coercedValue,
                () -> DataTypeUtils.getDateFormat(RecordFieldType.TIMESTAMP.getDefaultFormat()));
        if (DataTypeUtils.isLongTypeCompatible(stringValue)) {
            generator.writeNumber(DataTypeUtils.toLong(coercedValue, fieldName));
        } else {
            generator.writeString(stringValue);
        }
        break;
    }
    case DOUBLE:
        generator.writeNumber(DataTypeUtils.toDouble(coercedValue, fieldName));
        break;
    case FLOAT:
        generator.writeNumber(DataTypeUtils.toFloat(coercedValue, fieldName));
        break;
    case LONG:
        generator.writeNumber(DataTypeUtils.toLong(coercedValue, fieldName));
        break;
    case INT:
    case BYTE:
    case SHORT:
        generator.writeNumber(DataTypeUtils.toInteger(coercedValue, fieldName));
        break;
    case CHAR:
    case STRING:
        generator.writeString(coercedValue.toString());
        break;
    case BIGINT:
        if (coercedValue instanceof Long) {
            generator.writeNumber((Long) coercedValue);
        } else {
            generator.writeNumber((BigInteger) coercedValue);
        }
        break;
    case BOOLEAN:
        final String stringValue = coercedValue.toString();
        if ("true".equalsIgnoreCase(stringValue)) {
            generator.writeBoolean(true);
        } else if ("false".equalsIgnoreCase(stringValue)) {
            generator.writeBoolean(false);
        } else {
            generator.writeString(stringValue);
        }
        break;
    case RECORD: {
        final Record record = (Record) coercedValue;
        final RecordDataType recordDataType = (RecordDataType) chosenDataType;
        final RecordSchema childSchema = recordDataType.getChildSchema();
        writeRecord(record, childSchema, generator);
        break;
    }
    case MAP: {
        final MapDataType mapDataType = (MapDataType) chosenDataType;
        final DataType valueDataType = mapDataType.getValueType();
        final Map<String, ?> map = (Map<String, ?>) coercedValue;
        generator.writeStartObject();
        for (final Map.Entry<String, ?> entry : map.entrySet()) {
            final String mapKey = entry.getKey();
            final Object mapValue = entry.getValue();
            generator.writeFieldName(mapKey);
            writeValue(generator, mapValue, fieldName + "." + mapKey, valueDataType);
        }
        generator.writeEndObject();
        break;
    }
    case ARRAY:
    default:
        if (coercedValue instanceof Object[]) {
            final Object[] values = (Object[]) coercedValue;
            final ArrayDataType arrayDataType = (ArrayDataType) dataType;
            final DataType elementType = arrayDataType.getElementType();
            writeArray(values, fieldName, generator, elementType);
        } else {
            generator.writeString(coercedValue.toString());
        }
        break;
    }
}

From source file:org.apache.olingo.client.core.serialization.JsonSerializer.java

protected void primitiveValue(final JsonGenerator jgen, final EdmTypeInfo typeInfo, final Object value)
        throws IOException, EdmPrimitiveTypeException {

    final EdmPrimitiveTypeKind kind = typeInfo == null ? null : typeInfo.getPrimitiveTypeKind();
    final boolean isNumber = kind == null ? value instanceof Number : ArrayUtils.contains(NUMBER_TYPES, kind);
    final boolean isBoolean = kind == null ? value instanceof Boolean : kind == EdmPrimitiveTypeKind.Boolean;

    if (value == null) {
        jgen.writeNull();
    } else if (isBoolean) {
        jgen.writeBoolean((Boolean) value);
    } else {//from   w w w.  j  ava2 s .c o m
        String serialized = kind == null ? value.toString()
                // TODO: add facets
                : EdmPrimitiveTypeFactory.getInstance(kind).valueToString(value, null, null,
                        Constants.DEFAULT_PRECISION, Constants.DEFAULT_SCALE, null);

        if (isIEEE754Compatible
                && (kind == EdmPrimitiveTypeKind.Int64 || kind == EdmPrimitiveTypeKind.Decimal)) {
            jgen.writeString(serialized);
        } else if (isNumber) {
            jgen.writeNumber(serialized);
        } else {
            jgen.writeString(serialized);
        }
    }
}

From source file:org.apache.olingo.client.core.serialization.JsonSerializer.java

private void value(final JsonGenerator jgen, final String type, final Valuable value)
        throws IOException, EdmPrimitiveTypeException {
    final EdmTypeInfo typeInfo = type == null ? null
            : new EdmTypeInfo.Builder().setTypeExpression(type).build();

    if (value.isNull()) {
        jgen.writeNull();
    } else if (value.isCollection()) {
        collection(jgen, typeInfo, value.getValueType(), value.asCollection());
    } else if (value.isPrimitive()) {
        primitiveValue(jgen, typeInfo, value.asPrimitive());
    } else if (value.isEnum()) {
        jgen.writeString(value.asEnum().toString());
    } else if (value.isGeospatial()) {
        jgen.writeStartObject();// www . j  a  va 2s  .c  om
        geoSerializer.serialize(jgen, value.asGeospatial());
        jgen.writeEndObject();
    } else if (value.isComplex()) {
        complexValue(jgen, typeInfo, value.asComplex().getValue(), value.asComplex());
    }
}

From source file:org.apache.olingo.commons.core.data.AbstractJsonSerializer.java

private void value(final JsonGenerator jgen, final String type, final Value value) throws IOException {
    final EdmTypeInfo typeInfo = type == null ? null
            : new EdmTypeInfo.Builder().setTypeExpression(type).build();

    if (value.isNull()) {
        jgen.writeNull();
    } else if (value.isSimple()) {
        final boolean isNumber = typeInfo == null ? NumberUtils.isNumber(value.asSimple().get())
                : ArrayUtils.contains(NUMBER_TYPES, typeInfo.getPrimitiveTypeKind());
        final boolean isBoolean = typeInfo == null
                ? (value.asSimple().get().equalsIgnoreCase(Boolean.TRUE.toString())
                        || value.asSimple().get().equalsIgnoreCase(Boolean.FALSE.toString()))
                : typeInfo.getPrimitiveTypeKind() == EdmPrimitiveTypeKind.Boolean;

        if (isNumber) {
            jgen.writeNumber(value.asSimple().get());
        } else if (isBoolean) {
            jgen.writeBoolean(BooleanUtils.toBoolean(value.asSimple().get()));
        } else {/* w  ww.j a  v a  2 s.  c  o  m*/
            jgen.writeString(value.asSimple().get());
        }
    } else if (value.isGeospatial()) {
        jgen.writeStartObject();
        geoSerializer.serialize(jgen, value.asGeospatial().get());
        jgen.writeEndObject();
    } else if (value.isCollection()) {
        collection(jgen, typeInfo == null ? null : typeInfo.getFullQualifiedName().toString(),
                value.asCollection());
    } else if (value.isComplex()) {
        jgen.writeStartObject();
        for (Property property : value.asComplex().get()) {
            property(jgen, property, property.getName());
        }
        jgen.writeEndObject();
    }
}

From source file:org.apache.olingo.commons.core.serialization.JsonSerializer.java

protected void primitiveValue(final JsonGenerator jgen, final EdmTypeInfo typeInfo, final Object value)
        throws IOException, EdmPrimitiveTypeException {

    final EdmPrimitiveTypeKind kind = typeInfo == null ? null : typeInfo.getPrimitiveTypeKind();
    final boolean isNumber = kind == null ? value instanceof Number : ArrayUtils.contains(NUMBER_TYPES, kind);
    final boolean isBoolean = kind == null ? value instanceof Boolean : kind == EdmPrimitiveTypeKind.Boolean;

    if (value == null) {
        jgen.writeNull();
    } else if (isBoolean) {
        jgen.writeBoolean((Boolean) value);
    } else {//from w  w  w.jav a  2s .co  m
        final String serialized = kind == null ? value.toString()
                // TODO: add facets
                : EdmPrimitiveTypeFactory.getInstance(kind).valueToString(value, null, null,
                        Constants.DEFAULT_PRECISION, Constants.DEFAULT_SCALE, null);
        if (isNumber) {
            jgen.writeNumber(serialized);
        } else {
            jgen.writeString(serialized);
        }
    }
}

From source file:org.apache.olingo.commons.core.serialization.JsonSerializer.java

private void value(final JsonGenerator jgen, final String type, final Valuable value)
        throws IOException, EdmPrimitiveTypeException {
    final EdmTypeInfo typeInfo = type == null ? null
            : new EdmTypeInfo.Builder().setTypeExpression(type).build();

    if (value.isNull()) {
        jgen.writeNull();
    } else if (value.isPrimitive()) {
        primitiveValue(jgen, typeInfo, value.asPrimitive());
    } else if (value.isEnum()) {
        jgen.writeString(value.asEnum().toString());
    } else if (value.isGeospatial()) {
        jgen.writeStartObject();/*from w  w w  .  j  a  v  a 2s  .co m*/
        geoSerializer.serialize(jgen, value.asGeospatial());
        jgen.writeEndObject();
    } else if (value.isCollection()) {
        collection(jgen, typeInfo, value.getValueType(), value.asCollection());
    } else if (value.isLinkedComplex()) {
        complexValue(jgen, typeInfo, value.asLinkedComplex().getValue(), value.asLinkedComplex());
    } else if (value.isComplex()) {
        complexValue(jgen, typeInfo, value.asComplex(), null);
    }
}

From source file:org.apache.olingo.server.core.debug.DebugTabBody.java

@Override
public void appendJson(final JsonGenerator gen) throws IOException {
    if (response == null || response.getContent() == null) {
        gen.writeNull();
    } else {//from   w w  w. j  a  v  a  2s.c o  m
        gen.writeString(getContentString());
    }
}