Example usage for com.google.gson JsonElement isJsonNull

List of usage examples for com.google.gson JsonElement isJsonNull

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Introduction

In this page you can find the example usage for com.google.gson JsonElement isJsonNull.

Prototype

public boolean isJsonNull()

Source Link

Document

provides check for verifying if this element represents a null value or not.

Usage

From source file:com.kyloth.serleena.synchronization.kylothcloud.TrackEntityDeserializer.java

License:Open Source License

@Override
public TrackEntity deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException {
    TrackEntity te = new TrackEntity();
    String idString = json.getAsJsonObject().get("id").getAsString();
    te.uuid = UUID.fromString(idString);
    te.name = json.getAsJsonObject().get("name").getAsString();
    te.checkpoints = new LinkedList<CheckpointEntity>();
    JsonArray cpoints = json.getAsJsonObject().get("checkPoints").getAsJsonArray();
    for (JsonElement cpoint : cpoints) {
        CheckpointEntity cp = new CheckpointEntity();
        cp.id = cpoint.getAsJsonObject().get("id").getAsInt();
        cp.point = new GeoPoint(cpoint.getAsJsonObject().get("latitude").getAsFloat(),
                cpoint.getAsJsonObject().get("longitude").getAsFloat());
        te.checkpoints.add(cp);//from  w w w. ja v a  2 s.c  o  m
    }
    te.telemetries = new LinkedList<TelemetryEntity>();
    JsonElement bestTele = json.getAsJsonObject().get("bestTelemetry");

    if (!bestTele.isJsonNull())
        te.telemetries.add(new TelemetryEntityDeserializer().deserialize(bestTele.getAsJsonObject(),
                TelemetryEntity.class, context));
    return te;
}

From source file:com.ls.util.internal.ObjectComparator.java

License:Open Source License

private static @Nullable Object getDifferencesObject(JsonElement origin, JsonElement patched) {
    if (origin != null && origin.equals(patched)) {
        return UNCHANGED;
    }/*from   w w  w.  j  av  a2 s. co  m*/

    if (patched == null || patched.isJsonNull()) {
        return null;
    }

    if (origin == null || origin.isJsonNull()) {
        return convertElementToStringRepresentation(patched);
    }

    if (origin.isJsonArray()) {
        if (patched.isJsonArray()) {
            return getDifferencesForArrays((JsonArray) origin, (JsonArray) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    if (origin.isJsonObject()) {
        if (patched.isJsonObject()) {
            return getDifferencesMapForObjects((JsonObject) origin, (JsonObject) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    if (origin.isJsonPrimitive()) {
        if (patched.isJsonPrimitive()) {
            return getDifferencesForPrimitives((JsonPrimitive) origin, (JsonPrimitive) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    return convertElementToStringRepresentation(patched);
}

From source file:com.ls.util.internal.ObjectComparator.java

License:Open Source License

private static Object convertElementToStringRepresentation(JsonElement source) {
    if (source.isJsonNull()) {
        return null;
    }//from w w w  .ja  v a 2  s .com

    if (source.isJsonPrimitive()) {
        return source.toString();
    }

    if (source.isJsonObject()) {
        return getMapFromJsonElement((JsonObject) source);
    }

    if (source.isJsonArray()) {
        return getListFromJsonElement((JsonArray) source);
    }

    return null;
}

From source file:com.ls.util.ObjectComparator.java

License:Open Source License

@Nullable
private static Object getDifferencesObject(JsonElement origin, JsonElement patched) {
    if (origin != null && origin.equals(patched)) {
        return UNCHANGED;
    }//from w  w w .j a va 2s  . co  m

    if (patched == null || patched.isJsonNull()) {
        return null;
    }

    if (origin == null || origin.isJsonNull()) {
        return convertElementToStringRepresentation(patched);
    }

    if (origin.isJsonArray()) {
        if (patched.isJsonArray()) {
            return getDifferencesForArrays((JsonArray) origin, (JsonArray) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    if (origin.isJsonObject()) {
        if (patched.isJsonObject()) {
            return getDifferencesMapForObjects((JsonObject) origin, (JsonObject) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    if (origin.isJsonPrimitive()) {
        if (patched.isJsonPrimitive()) {
            return getDifferencesForPrimitives((JsonPrimitive) origin, (JsonPrimitive) patched);
        } else {
            return convertElementToStringRepresentation(patched);
        }
    }

    return convertElementToStringRepresentation(patched);
}

From source file:com.mediamath.terminalone.service.GetService.java

License:Apache License

/**
 * parses error response of Get operation.
 * //from w ww . j a va 2s  .  c  om
 * @param responseStr
 *          string.
 * @return JsonPostErrorResponse object.
 */
public JsonPostErrorResponse jsonGetErrorResponseParser(String responseStr) {
    JsonParser parser1 = new JsonParser();
    JsonObject obj = parser1.parse(responseStr).getAsJsonObject();

    JsonElement errorsElement = obj.get("errors");
    JsonElement errorElement = obj.get("error");
    JsonElement metaElement = obj.get("meta");

    JsonPostErrorResponse errorResponse = null;

    if (errorsElement != null || errorElement != null) {
        errorResponse = new JsonPostErrorResponse();
        GsonBuilder builder = new GsonBuilder();
        builder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES);
        builder.setDateFormat(YYYY_MM_DD_T_HH_MM_SS);

        Gson gson = builder.create();

        if (errorsElement != null) {
            if (errorsElement.isJsonNull()) {

            } else if (errorsElement.isJsonObject()) {
                T1Error errors = gson.fromJson(errorsElement, T1Error.class);
                // specific to video creatives
                if (errors != null && errors.getContent() == null && errors.getField() == null
                        && errors.getFieldError() == null && errors.getMessage() == null) {

                    GsonBuilder videoBuilder = new GsonBuilder();
                    videoBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
                    videoBuilder.setDateFormat(YYYY_MM_DD_T_HH_MM_SS);

                    Gson vidgson = videoBuilder.create();

                    errors = vidgson.fromJson(errorsElement, T1Error.class);
                }
                errorResponse.setErrors(errors);
            } else if (errorsElement.isJsonArray()) {
                JsonArray array = errorsElement.getAsJsonArray();
                JsonArray newArray = new JsonArray();

                for (int i = 0; i < array.size(); i++) {
                    if (!(array.get(i) instanceof JsonPrimitive)) {
                        newArray.add(array.get(i));

                    }
                }
                if (newArray.size() > 0) {
                    errorsElement = newArray;
                    Type type = new TypeToken<ArrayList<T1Error>>() {
                    }.getType();
                    List<T1Error> errors = gson.fromJson(errorsElement, type);
                    errorResponse.setErrors(errors);
                }
            }
        }

        if (errorElement != null) {
            T1Error error = gson.fromJson(errorElement, T1Error.class);
            errorResponse.setError(error);
        }

        if (metaElement != null) {
            T1Meta meta = gson.fromJson(metaElement, T1Meta.class);
            errorResponse.setMeta(meta);
        }
    }

    return errorResponse;
}

From source file:com.mediamath.terminalone.utils.T1JsonToObjParser.java

License:Apache License

/**
 * Determines the Json Element type from the given response.
 * /* w  w w  .  j av  a  2  s .com*/
 * @param response
 *          JSON response string.
 * 
 * @return int value <br>
 *         0 = null body<br>
 *         1 = Json Element is of type Object. <br>
 *         2 = Json Element is of type Array.
 * 
 */
public int getJsonElementType(String response) {
    int isArrayObj = 0; // 0 = null
    JsonParser parser = new JsonParser();
    JsonObject obj = parser.parse(response).getAsJsonObject();
    JsonElement element = obj.get("data");
    if (element != null) {
        if (element.isJsonArray()) {
            isArrayObj = 2; // array object
        } else if (element.isJsonObject()) {
            isArrayObj = 1; // single object
        } else if (element.isJsonNull()) {
            isArrayObj = 0; // nothing.
        }
    } else {
        isArrayObj = getErrorElementType(response);
    }
    return isArrayObj;
}

From source file:com.mediamath.terminalone.utils.T1JsonToObjParser.java

License:Apache License

private int getErrorElementType(String response) {
    int isArrayObj = 0; // 0 = null
    JsonParser parser = new JsonParser();
    JsonObject obj = parser.parse(response).getAsJsonObject();
    JsonElement errorElement = obj.get("errors");
    if (errorElement != null) {
        if (errorElement.isJsonNull()) {
            isArrayObj = 0; // null
        } else {// w w  w  .  jav a  2s.c o m
            isArrayObj = 2; // array
        }
    }
    return isArrayObj;
}

From source file:com.michaelfotiadis.crossyscore.core.data.parsers.gson.RuntimeTypeAdapterFactory.java

License:Apache License

public <R> TypeAdapter<R> create(final Gson gson, final TypeToken<R> type) {
    if (!type.getRawType().equals(baseType)) {
        return null;
    }//  ww  w. j  a  v a 2  s .  c o  m

    final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<>();
    final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<>();

    for (final Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) {
        final TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue()));
        labelToDelegate.put(entry.getKey(), delegate);
        subtypeToDelegate.put(entry.getValue(), delegate);
    }

    return new TypeAdapter<R>() {
        @Override
        public void write(final JsonWriter out, final R value) throws IOException {
            if (value != null) {
                final Class<?> srcType = value.getClass();
                final String label = subtypeToLabel.get(srcType);
                @SuppressWarnings("unchecked")
                final // registration requires that subtype extends T
                TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType);
                if (delegate == null) {
                    throw new JsonParseException("cannot serialize " + srcType.getName()
                            + "; did you forget to register a subtype?");
                }
                final JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject();
                if (jsonObject.has(typeFieldName)) {
                    throw new JsonParseException("cannot serialize " + srcType.getName()
                            + " because it already defines a field named " + typeFieldName);
                }
                final JsonObject clone = new JsonObject();
                clone.add(typeFieldName, new JsonPrimitive(label));
                for (final Map.Entry<String, JsonElement> e : jsonObject.entrySet()) {
                    clone.add(e.getKey(), e.getValue());
                }
                Streams.write(clone, out);
            } else {
                out.nullValue();
            }
        }

        @Override
        public R read(final JsonReader in) throws IOException {
            final JsonElement jsonElement = Streams.parse(in);
            // fix for null Json Elements
            if (jsonElement.isJsonNull()) {
                return null;
            }

            final JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName);
            final String label = getBaseTypeLabel(labelJsonElement);
            @SuppressWarnings("unchecked") // registration requires that subtype extends T
            final TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label);

            if (delegate == null) {
                throw new JsonParseException("cannot deserialize " + baseType + " subtype named " + label
                        + "; did you forget to register a subtype?");
            }

            return delegate.fromJsonTree(jsonElement);
        }

        private String getBaseTypeLabel(final JsonElement labelJsonElement) {
            final String label;

            if (labelJsonElement == null) {
                if (defaultSubTypeLabel == null) {
                    throw new JsonParseException("cannot deserialize " + baseType
                            + " because it does not define a field named " + typeFieldName);
                } else {
                    label = defaultSubTypeLabel;

                    if (!labelToDelegate.containsKey(label)) {
                        throw new IllegalStateException(
                                "WTF: Was looking for " + label + " in " + labelToDelegate.keySet());
                    }

                }
            } else {
                label = labelJsonElement.getAsString();
            }

            return label;
        }
    };
}

From source file:com.michaelfotiadis.steam.net.gson.RuntimeTypeAdapterFactory.java

License:Apache License

public <R> TypeAdapter<R> create(final Gson gson, final TypeToken<R> type) {
    if (type.getRawType() != baseType) {
        return null;
    }//w  ww  .  j  a va2s.  co m

    final Map<String, TypeAdapter<?>> labelToDelegate = new LinkedHashMap<>();
    final Map<Class<?>, TypeAdapter<?>> subtypeToDelegate = new LinkedHashMap<>();

    for (final Map.Entry<String, Class<?>> entry : labelToSubtype.entrySet()) {
        final TypeAdapter<?> delegate = gson.getDelegateAdapter(this, TypeToken.get(entry.getValue()));
        labelToDelegate.put(entry.getKey(), delegate);
        subtypeToDelegate.put(entry.getValue(), delegate);
    }

    return new TypeAdapter<R>() {
        private String getBaseTypeLabel(final JsonElement labelJsonElement) {
            final String label;

            if (labelJsonElement == null) {
                if (defaultSubTypeLabel == null) {
                    throw new JsonParseException("cannot deserialize " + baseType
                            + " because it does not define a field named " + typeFieldName);
                } else {
                    label = defaultSubTypeLabel;

                    if (!labelToDelegate.containsKey(label)) {
                        throw new IllegalStateException(
                                "WTF: Was looking for " + label + " in " + labelToDelegate.keySet());
                    }

                }
            } else {
                label = labelJsonElement.getAsString();
            }

            return label;
        }

        @Override
        public R read(final JsonReader in) throws IOException {
            final JsonElement jsonElement = Streams.parse(in);
            // fix for null Json Elements
            if (jsonElement.isJsonNull()) {
                return null;
            }

            final JsonElement labelJsonElement = jsonElement.getAsJsonObject().remove(typeFieldName);
            final String label = getBaseTypeLabel(labelJsonElement);
            @SuppressWarnings("unchecked") // registration requires that subtype extends T
            final TypeAdapter<R> delegate = (TypeAdapter<R>) labelToDelegate.get(label);

            if (delegate == null) {
                throw new JsonParseException("cannot deserialize " + baseType + " subtype named " + label
                        + "; did you forget to register a subtype?");
            }

            return delegate.fromJsonTree(jsonElement);
        }

        @Override
        public void write(final JsonWriter out, final R value) throws IOException {
            if (value != null) {
                final Class<?> srcType = value.getClass();
                final String label = subtypeToLabel.get(srcType);
                @SuppressWarnings("unchecked")
                final // registration requires that subtype extends T
                TypeAdapter<R> delegate = (TypeAdapter<R>) subtypeToDelegate.get(srcType);
                if (delegate == null) {
                    throw new JsonParseException("cannot serialize " + srcType.getName()
                            + "; did you forget to register a subtype?");
                }
                final JsonObject jsonObject = delegate.toJsonTree(value).getAsJsonObject();
                if (jsonObject.has(typeFieldName)) {
                    throw new JsonParseException("cannot serialize " + srcType.getName()
                            + " because it already defines a field named " + typeFieldName);
                }
                final JsonObject clone = new JsonObject();
                clone.add(typeFieldName, new JsonPrimitive(label));
                for (final Map.Entry<String, JsonElement> e : jsonObject.entrySet()) {
                    clone.add(e.getKey(), e.getValue());
                }
                Streams.write(clone, out);
            } else {
                out.nullValue();
            }
        }
    };
}

From source file:com.microsoft.windowsazure.mobileservices.table.MobileServiceJsonTable.java

License:Open Source License

/**
 * Validates the Id property from a JsonObject on an Insert Action
 *
 * @param json The JsonObject to modify/*from  w ww  .  java  2 s  .  co  m*/
 */
private Object validateIdOnInsert(final JsonObject json) {
    // Remove id property if exists
    String[] idPropertyNames = new String[] { "id", "Id", "iD", "ID" };

    for (int i = 0; i < 4; i++) {
        String idProperty = idPropertyNames[i];

        if (json.has(idProperty)) {
            JsonElement idElement = json.get(idProperty);

            if (isStringType(idElement)) {
                String id = getStringValue(idElement);

                if (!isValidStringId(id)) {
                    throw new IllegalArgumentException(
                            "The entity to insert has an invalid string value on " + idProperty + " property.");
                }

                return id;
            } else if (isNumericType(idElement)) {
                long id = getNumericValue(idElement);

                if (!isDefaultNumericId(id)) {
                    throw new IllegalArgumentException("The entity to insert should not have a numeric "
                            + idProperty + " property defined.");
                }

                json.remove(idProperty);

                return id;

            } else if (idElement.isJsonNull()) {
                json.remove(idProperty);

                return null;

            } else {
                throw new IllegalArgumentException("The entity to insert should not have an " + idProperty
                        + " defined with an invalid value");
            }
        }
    }

    return null;
}