Example usage for com.fasterxml.jackson.core JsonToken VALUE_NULL

Introduction

In this page you can find the example usage for com.fasterxml.jackson.core JsonToken VALUE_NULL.

Prototype

JsonToken VALUE_NULL

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Document

VALUE_NULL is returned when encountering literal "null" in value context

Usage

From source file:org.mongojack.internal.util.CalendarDeserializerTest.java

@Test
public void testDateIsNull() throws IOException {
    when(jsonParser.getCurrentToken()).thenReturn(JsonToken.VALUE_NULL);

    deserializedDate = deserializer.deserialize(jsonParser, deserializationContext);
    assertNull(deserializedDate);//from   ww w  .  j  a  v  a 2s  .c  o  m
}

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From source file:com.kaaprotech.satu.jackson.SatuDeserializers.java

@Override
public JsonDeserializer<?> findMapDeserializer(final MapType type, final DeserializationConfig config,
        BeanDescription beanDesc, final KeyDeserializer keyDeserializer,
        final TypeDeserializer elementTypeDeserializer, final JsonDeserializer<?> elementDeserializer)
        throws JsonMappingException {

    if (ImmutableMap.class.isAssignableFrom(type.getRawClass())) {
        return new StdDeserializer<Object>(type) {
            private static final long serialVersionUID = 1L;

            @Override/*from  w ww  . j  av  a 2 s.  c o  m*/
            public Object deserialize(JsonParser jp, DeserializationContext context) throws IOException {

                JsonToken t = jp.getCurrentToken();
                if (t == JsonToken.START_OBJECT) {
                    t = jp.nextToken();
                }
                if (t != JsonToken.FIELD_NAME && t != JsonToken.END_OBJECT) {
                    throw context.mappingException(type.getRawClass());
                }

                MutableMap<Object, Object> m = Maps.mutable.of();

                for (; jp.getCurrentToken() == JsonToken.FIELD_NAME; jp.nextToken()) {
                    // Pointing to field name
                    String fieldName = jp.getCurrentName();
                    Object key = (keyDeserializer == null) ? fieldName
                            : keyDeserializer.deserializeKey(fieldName, context);
                    t = jp.nextToken();

                    Object value;
                    if (t == JsonToken.VALUE_NULL) {
                        value = null;
                    } else if (elementDeserializer == null) {
                        value = jp.readValueAs(type.getContentType().getRawClass());
                    } else if (elementTypeDeserializer == null) {
                        value = elementDeserializer.deserialize(jp, context);
                    } else {
                        value = elementDeserializer.deserializeWithType(jp, context, elementTypeDeserializer);
                    }
                    m.put(key, value);
                }
                return m.toImmutable();
            }
        };
    }

    return super.findMapDeserializer(type, config, beanDesc, keyDeserializer, elementTypeDeserializer,
            elementDeserializer);
}

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From source file:net.nullschool.grains.jackson.datatype.AbstractBasicConstCollectionDeserializer.java

@Override
public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
    JsonToken token = jp.getCurrentToken();
    if (token != JsonToken.START_ARRAY) {
        throw ctxt.mappingException(collectionType.getRawClass());
    }/*from  w  ww  .ja  va 2  s  .c o  m*/

    if ((token = jp.nextToken()) == JsonToken.END_ARRAY) {
        return emptyResult();
    }

    JsonDeserializer<?> ed = elementDeserializer;
    TypeDeserializer etd = elementTypeDeserializer;

    List<Object> elements = null;
    Object element;
    do {
        element = token != JsonToken.VALUE_NULL
                ? etd == null ? ed.deserialize(jp, ctxt) : ed.deserializeWithType(jp, ctxt, etd)
                : null;

        token = jp.nextToken();
        if (elements == null) {
            if (token == JsonToken.END_ARRAY) {
                return resultOf(element);
            }
            elements = new ArrayList<>();
        }
        elements.add(element);
    } while (token != JsonToken.END_ARRAY);

    return asResult(elements);
}

---

From source file:net.nullschool.grains.jackson.datatype.GrainDeserializer.java

@Override
public Grain deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
    JsonToken token = jp.getCurrentToken();
    if (token == JsonToken.START_OBJECT) {
        token = jp.nextToken();/*  w  ww  . j  a va2s .  c  om*/
    } else if (token != JsonToken.FIELD_NAME) {
        throw ctxt.mappingException(getValueClass());
    }

    if (token == JsonToken.END_OBJECT) {
        return factory.getDefaultValue();
    }

    GrainBuilder builder = factory.getNewBuilder();

    do {
        String key = jp.getCurrentName();
        PropertyReader reader = readers.get(key);
        token = jp.nextToken();
        Object value;
        if (token == JsonToken.VALUE_NULL) {
            value = null;
        } else if (reader != null) {
            value = reader.deserializer.deserialize(jp, ctxt);
        } else {
            switch (token) {
            case START_ARRAY:
                value = extArrayDeserializer.deserialize(jp, ctxt);
                break;
            case START_OBJECT:
                value = extObjectDeserializer.deserialize(jp, ctxt);
                break;
            default:
                value = extValueDeserializer.deserialize(jp, ctxt);
            }
        }

        builder.put(key, value);
    } while (jp.nextToken() == JsonToken.FIELD_NAME);

    return builder.build();
}

---

From source file:net.nullschool.grains.jackson.datatype.AbstractBasicConstMapDeserializer.java

@Override
public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
    JsonToken token = jp.getCurrentToken();
    if (token == JsonToken.START_OBJECT) {
        token = jp.nextToken();/*from  w  ww. ja  v a  2s.  c om*/
    } else if (token != JsonToken.FIELD_NAME) {
        throw ctxt.mappingException(mapType.getRawClass());
    }

    if (token == JsonToken.END_OBJECT) {
        return emptyResult();
    }

    KeyDeserializer kd = keyDeserializer;
    JsonDeserializer<?> vd = valueDeserializer;
    TypeDeserializer vtd = valueTypeDeserializer;

    List<Object> keys = null;
    List<Object> values = null;
    Object key;
    Object value;
    do {
        String name = jp.getCurrentName();
        key = kd == null ? name : kd.deserializeKey(name, ctxt);
        value = jp.nextToken() != JsonToken.VALUE_NULL
                ? vtd == null ? vd.deserialize(jp, ctxt) : vd.deserializeWithType(jp, ctxt, vtd)
                : null;

        token = jp.nextToken();
        if (keys == null) {
            if (token == JsonToken.END_OBJECT) {
                return resultOf(key, value);
            }
            keys = new ArrayList<>();
            values = new ArrayList<>();
        }
        keys.add(key);
        values.add(value);
    } while (token != JsonToken.END_OBJECT);

    return asResult(keys, values);
}

---

From source file:cz.cvut.kbss.jsonld.jackson.deserialization.JacksonJsonLdDeserializer.java

private Object parseJsonObject(JsonParser parser) throws IOException {
    Object value = null;/*from w  ww.jav a2  s.c  o m*/
    final JsonToken initialToken = parser.getCurrentToken();
    parser.setCodec(mapper);
    if (initialToken == JsonToken.START_ARRAY) {
        value = parser.readValueAs(new TypeReference<List<?>>() {
        });
    } else if (initialToken == JsonToken.START_OBJECT) {
        value = parser.readValueAs(new TypeReference<Map<?, ?>>() {
        });
    } else if (initialToken == JsonToken.VALUE_STRING) {
        value = parser.readValueAs(String.class);
    } else if (initialToken == JsonToken.VALUE_FALSE || initialToken == JsonToken.VALUE_TRUE) {
        value = parser.readValueAs(Boolean.class);
    } else if (initialToken == JsonToken.VALUE_NUMBER_FLOAT || initialToken == JsonToken.VALUE_NUMBER_INT) {
        value = parser.readValueAs(Number.class);
    } else if (initialToken == JsonToken.VALUE_NULL) {
        value = null;
    }
    return value;
}

---

From source file:org.mongojack.internal.object.BsonObjectCursor.java

private static JsonToken getToken(Object o) {
    if (o == null) {
        return JsonToken.VALUE_NULL;
    } else if (o instanceof Iterable) {
        return JsonToken.START_ARRAY;
    } else if (o instanceof BSONObject) {
        return JsonToken.START_OBJECT;
    } else if (o instanceof Number) {
        if (o instanceof Double || o instanceof Float || o instanceof BigDecimal) {
            return JsonToken.VALUE_NUMBER_FLOAT;
        } else {/*from w  w  w.j a  v a 2 s  . c  om*/
            return JsonToken.VALUE_NUMBER_INT;
        }
    } else if (o instanceof Boolean) {
        if ((Boolean) o) {
            return JsonToken.VALUE_TRUE;
        } else {
            return JsonToken.VALUE_FALSE;
        }
    } else if (o instanceof CharSequence) {
        return JsonToken.VALUE_STRING;
    } else if (o instanceof ObjectId) {
        return JsonToken.VALUE_EMBEDDED_OBJECT;
    } else if (o instanceof DBRef) {
        return JsonToken.VALUE_EMBEDDED_OBJECT;
    } else if (o instanceof Date) {
        return JsonToken.VALUE_EMBEDDED_OBJECT;
    } else if (o instanceof byte[]) {
        return JsonToken.VALUE_EMBEDDED_OBJECT;
    } else {
        throw new IllegalStateException("Don't know how to parse type: " + o.getClass());
    }
}

---

From source file:com.google.openrtb.json.OpenRtbNativeJsonReader.java

/**
 * Desserializes a {@link NativeRequest} from JSON, with a provided {@link JsonParser}
 * which allows several choices of input and encoding.
 *///from w ww  .j av a 2s  . co  m
public final NativeRequest.Builder readNativeRequest(JsonParser par) throws IOException {
    if (emptyToNull(par)) {
        return null;
    }
    NativeRequest.Builder req = NativeRequest.newBuilder();
    boolean rootNativeField = false;
    boolean firstField = true;
    for (startObject(par); endObject(par); par.nextToken()) {
        String fieldName = getCurrentName(par);
        if (par.nextToken() != JsonToken.VALUE_NULL) {
            if (firstField) {
                firstField = false;
                if ((rootNativeField = "native".equals(fieldName)) == true) {
                    startObject(par);
                    fieldName = getCurrentName(par);
                    par.nextToken();
                }
            }
            if (par.getCurrentToken() != JsonToken.VALUE_NULL) {
                readNativeRequestField(par, req, fieldName);
            }
        }
    }
    if (rootNativeField && !endObject(par)) {
        par.nextToken();
    }
    return req;
}

---

From source file:com.sdl.odata.unmarshaller.json.core.JsonProcessor.java

/**
 * Process all things that do not contain special ODataTags.
 *
 * @param jsonParser the parser/*from w  w w.  ja  v a 2s . co  m*/
 * @throws ODataUnmarshallingException If unable to unmarshall
 * @throws IOException If unable to read input parser
 */
private void process(JsonParser jsonParser) throws IOException, ODataUnmarshallingException {
    if (jsonParser.getCurrentToken() == JsonToken.FIELD_NAME) {
        LOG.info("Starting to parse {} token", jsonParser.getCurrentName());
        String key = jsonParser.getCurrentName();
        jsonParser.nextToken();

        JsonToken token = jsonParser.getCurrentToken();
        if (token == JsonToken.START_ARRAY) {
            if (JsonConstants.VALUE.equals(key)) {
                throw new ODataUnmarshallingException("Feed is not supported");
            }
            values.put(key, getCollectionValue(jsonParser));
        } else if (token == JsonToken.START_OBJECT) {
            values.put(key, getEmbeddedObject(jsonParser));
        } else {
            if (token.equals(JsonToken.VALUE_NULL)) {
                values.put(key, null);
            } else {
                values.put(key, jsonParser.getText());
            }
        }
    }
}

---

From source file:com.kaaprotech.satu.jackson.SatuDeserializers.java

@Override
public JsonDeserializer<?> findCollectionDeserializer(final CollectionType type,
        final DeserializationConfig config, final BeanDescription beanDesc,
        final TypeDeserializer elementTypeDeserializer, final JsonDeserializer<?> elementDeserializer)
        throws JsonMappingException {

    if (ImmutableSet.class.isAssignableFrom(type.getRawClass())) {
        return new StdDeserializer<Object>(type) {
            private static final long serialVersionUID = 1L;

            @Override/*from w  w  w  . jav  a2 s. c o  m*/
            public Object deserialize(JsonParser jp, DeserializationContext context) throws IOException {

                if (jp.isExpectedStartArrayToken()) {
                    JsonToken t;

                    MutableSet<Object> s = Sets.mutable.of();

                    while ((t = jp.nextToken()) != JsonToken.END_ARRAY) {
                        Object value;
                        if (t == JsonToken.VALUE_NULL) {
                            value = null;
                        } else if (elementDeserializer == null) {
                            value = jp.readValueAs(type.getContentType().getRawClass());
                        } else if (elementTypeDeserializer == null) {
                            value = elementDeserializer.deserialize(jp, context);
                        } else {
                            value = elementDeserializer.deserializeWithType(jp, context,
                                    elementTypeDeserializer);
                        }
                        s.add(value);
                    }
                    return s.toImmutable();
                }
                throw context.mappingException(type.getRawClass());
            }
        };
    }

    return super.findCollectionDeserializer(type, config, beanDesc, elementTypeDeserializer,
            elementDeserializer);
}

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