Example usage for com.google.gson JsonElement isJsonNull

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:org.eclim.Eclim.java

License:Open Source License

public static Object toType(JsonElement json) {
    // null/*from  w w  w . j a  v a  2  s.  c om*/
    if (json.isJsonNull()) {
        return null;

        // int, double, boolean, String
    } else if (json.isJsonPrimitive()) {
        JsonPrimitive prim = json.getAsJsonPrimitive();
        if (prim.isBoolean()) {
            return prim.getAsBoolean();
        } else if (prim.isString()) {
            return prim.getAsString();
        } else if (prim.isNumber()) {
            if (prim.getAsString().indexOf('.') != -1) {
                return prim.getAsDouble();
            }
            return prim.getAsInt();
        }

        // List
    } else if (json.isJsonArray()) {
        ArrayList<Object> type = new ArrayList<Object>();
        for (JsonElement element : json.getAsJsonArray()) {
            type.add(toType(element));
        }
        return type;

        // Map
    } else if (json.isJsonObject()) {
        HashMap<String, Object> type = new HashMap<String, Object>();
        for (Map.Entry<String, JsonElement> entry : json.getAsJsonObject().entrySet()) {
            type.put(entry.getKey(), toType(entry.getValue()));
        }
        return type;
    }

    return null;
}

---

From source file:org.eclipse.che.api.core.jsonrpc.impl.GsonJsonRpcUnmarshaller.java

License:Open Source License

private Object getInnerItem(JsonElement jsonElement) {
    if (jsonElement.isJsonNull()) {
        return null;
    }//from  ww  w  .ja  v  a2  s  .c om

    if (jsonElement.isJsonObject()) {
        return jsonElement.getAsJsonObject();
    }

    if (jsonElement.isJsonPrimitive()) {
        JsonPrimitive jsonPrimitive = jsonElement.getAsJsonPrimitive();
        if (jsonPrimitive.isNumber()) {
            return jsonPrimitive.getAsDouble();
        } else if (jsonPrimitive.isString()) {
            return jsonPrimitive.getAsString();
        } else {
            return jsonPrimitive.getAsBoolean();
        }
    }

    throw new IllegalStateException("Unexpected json element type");
}

---

From source file:org.eclipse.jgit.diff.EditDeserializer.java

License:Apache License

@Override
public Edit deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
        throws JsonParseException {
    if (json.isJsonNull()) {
        return null;
    }//from  ww w. j  a va 2 s . c o  m
    if (!json.isJsonArray()) {
        throw new JsonParseException("Expected array for Edit type");
    }

    final JsonArray o = (JsonArray) json;
    final int cnt = o.size();
    if (cnt < 4 || cnt % 4 != 0) {
        throw new JsonParseException("Expected array of 4 for Edit type");
    }

    if (4 == cnt) {
        return new Edit(get(o, 0), get(o, 1), get(o, 2), get(o, 3));
    }

    List<Edit> l = new ArrayList<>((cnt / 4) - 1);
    for (int i = 4; i < cnt;) {
        int as = get(o, i++);
        int ae = get(o, i++);
        int bs = get(o, i++);
        int be = get(o, i++);
        l.add(new Edit(as, ae, bs, be));
    }
    return new ReplaceEdit(get(o, 0), get(o, 1), get(o, 2), get(o, 3), l);
}

---

From source file:org.eclipse.milo.opcua.binaryschema.gson.JsonStructureCodec.java

License:Open Source License

@Override
protected Object memberTypeToOpcUaScalar(JsonElement member, String typeName) {
    if (member == null || member.isJsonNull()) {
        return null;
    } else if (member.isJsonArray()) {
        JsonArray array = member.getAsJsonArray();

        switch (typeName) {
        case "ByteString": {
            byte[] bs = new byte[array.size()];

            for (int i = 0; i < array.size(); i++) {
                bs[i] = array.get(i).getAsByte();
            }// w w w.  java 2  s.  c  om

            return ByteString.of(bs);
        }

        default:
            return array;
        }
    } else if (member.isJsonObject()) {
        JsonObject jsonObject = member.getAsJsonObject();

        switch (typeName) {
        case "QualifiedName": {
            return new QualifiedName(jsonObject.get("namespaceIndex").getAsInt(),
                    jsonObject.get("name").getAsString());
        }
        case "LocalizedText": {
            return new LocalizedText(jsonObject.get("locale").getAsString(),
                    jsonObject.get("text").getAsString());
        }

        default:
            return jsonObject;
        }
    } else if (member.isJsonPrimitive()) {
        JsonPrimitive primitive = member.getAsJsonPrimitive();

        if (primitive.isBoolean()) {
            return primitive.getAsBoolean();
        } else if (primitive.isString()) {
            switch (typeName) {
            case "Guid":
                return UUID.fromString(primitive.getAsString());

            case "NodeId":
                return NodeId.parseSafe(primitive.getAsString()).orElse(NodeId.NULL_VALUE);

            case "ExpandedNodeId":
                return ExpandedNodeId.parse(primitive.getAsString());

            case "XmlElement":
                return new XmlElement(primitive.getAsString());

            default:
                return primitive.getAsString();
            }
        } else if (primitive.isNumber()) {
            switch (typeName) {
            case "SByte":
                return primitive.getAsByte();
            case "Int16":
                return primitive.getAsShort();
            case "Int32":
                return primitive.getAsInt();
            case "Int64":
                return primitive.getAsLong();

            case "Byte":
                return ubyte(primitive.getAsShort());
            case "UInt16":
                return ushort(primitive.getAsInt());
            case "UInt32":
                return uint(primitive.getAsLong());
            case "UInt64":
                return ulong(primitive.getAsBigInteger());

            case "Float":
                return primitive.getAsFloat();
            case "Double":
                return primitive.getAsDouble();

            case "DateTime":
                return new DateTime(primitive.getAsLong());

            case "StatusCode":
                return new StatusCode(primitive.getAsLong());

            default:
                return primitive.getAsNumber();
            }
        }
    }

    return null;
}

---

From source file:org.eclipse.php.composer.api.json.JsonParser.java

License:Open Source License

private Object buildTree(JsonElement entity) {

    if (entity.isJsonPrimitive()) {
        JsonPrimitive p = entity.getAsJsonPrimitive();
        if (p.isBoolean()) {
            return p.getAsBoolean();
        }/*w  w w.j a va  2 s. co m*/
        if (p.isNumber()) {
            return p.getAsLong();
        }
        return p.getAsString();
    } else if (entity.isJsonNull()) {
        return null;
    } else if (entity.isJsonArray()) {
        LinkedList<Object> arr = new LinkedList<Object>();
        for (JsonElement el : entity.getAsJsonArray()) {
            arr.add(buildTree(el));
        }
        return arr;
    } else if (entity.isJsonObject()) {
        LinkedHashMap<String, Object> map = new LinkedHashMap<String, Object>();
        for (Entry<String, JsonElement> el : entity.getAsJsonObject().entrySet()) {
            map.put(el.getKey(), buildTree(el.getValue()));
        }
        return map;
    }

    return null;
}

---

From source file:org.eclipse.scada.base.json.VariantJsonDeserializer.java

License:Open Source License

@Override
public Variant deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
        throws JsonParseException {
    if (json.isJsonNull()) {
        return null;
    }//from  w w  w. j  a  v  a  2  s  . c  om

    if (json instanceof JsonPrimitive) {
        return decodeFromPrimitive(json);
    }

    if (json instanceof JsonObject) {
        final JsonObject jsonObj = (JsonObject) json;
        final JsonElement type = jsonObj.get(VariantJson.FIELD_TYPE);
        final JsonElement value = jsonObj.get(VariantJson.FIELD_VALUE);

        if (type == null || type.isJsonNull()) {
            if (value == null) {
                throw new JsonParseException(String.format("Variant encoded as object must have a field '%s'",
                        VariantJson.FIELD_VALUE));
            }
            return Variant.valueOf(value.getAsString());
        }

        if (!type.isJsonPrimitive()) {
            throw new JsonParseException(
                    String.format("Variant field '%s' must be a string containing the variant type (%s)",
                            VariantJson.FIELD_TYPE, StringHelper.join(VariantType.values(), ", ")));
        }

        final String typeStr = type.getAsString();

        if (typeStr.equals("NULL")) {
            return Variant.NULL;
        }

        if (value == null || value.isJsonNull()) {
            throw new JsonParseException(String.format(
                    "The type '%s' does not support a null value. Use variant type NULL instead.", typeStr));
        }

        if (value.isJsonObject() || value.isJsonArray()) {
            throw new JsonParseException(
                    "The variant value must be a JSON primitive matching the type. Arrays and objects are not supported");
        }

        switch (type.getAsString()) {
        case "BOOLEAN":
            return Variant.valueOf(value.getAsBoolean());
        case "STRING":
            return Variant.valueOf(value.getAsString());
        case "DOUBLE":
            return Variant.valueOf(value.getAsDouble());
        case "INT32":
            return Variant.valueOf(value.getAsInt());
        case "INT64":
            return Variant.valueOf(value.getAsLong());
        default:
            throw new JsonParseException(String.format("Type '%s' is unknown (known types: %s)",
                    StringHelper.join(VariantType.values(), ", ")));
        }
    }

    throw new JsonParseException("Unknown serialization of Variant type");
}

---

From source file:org.eclipse.smarthome.binding.tradfri.handler.TradfriControllerHandler.java

License:Open Source License

@Override
public void onUpdate(JsonElement data) {
    if (active && !(data.isJsonNull())) {
        state = new TradfriControllerData(data);
        updateStatus(state.getReachabilityStatus() ? ThingStatus.ONLINE : ThingStatus.OFFLINE);

        DecimalType batteryLevel = state.getBatteryLevel();
        if (batteryLevel != null) {
            updateState(CHANNEL_BATTERY_LEVEL, batteryLevel);
        }// w w w.ja  v  a2s  . c  o m

        OnOffType batteryLow = state.getBatteryLow();
        if (batteryLow != null) {
            updateState(CHANNEL_BATTERY_LOW, batteryLow);
        }

        updateDeviceProperties(state);

        logger.debug(
                "Updating thing for controllerId {} to state {batteryLevel: {}, batteryLow: {}, firmwareVersion: {}, modelId: {}, vendor: {}}",
                state.getDeviceId(), batteryLevel, batteryLow, state.getFirmwareVersion(), state.getModelId(),
                state.getVendor());
    }
}

---

From source file:org.eclipse.smarthome.binding.tradfri.handler.TradfriLightHandler.java

License:Open Source License

@Override
public void onUpdate(JsonElement data) {
    if (active && !(data.isJsonNull())) {
        state = new LightData(data);
        updateStatus(state.getReachabilityStatus() ? ThingStatus.ONLINE : ThingStatus.OFFLINE);

        if (!state.getOnOffState()) {
            logger.debug("Setting state to OFF");
            updateState(CHANNEL_BRIGHTNESS, PercentType.ZERO);
            // if we are turned off, we do not set any brightness value
            return;
        }/*from w w  w.ja v a2  s. c o m*/

        PercentType dimmer = state.getBrightness();
        if (dimmer != null) {
            logger.debug("Updating brightness to {}", dimmer);
            updateState(CHANNEL_BRIGHTNESS, dimmer);
        }

        PercentType colorTemp = state.getColorTemperature();
        if (colorTemp != null) {
            logger.debug("Updating color temperature to {} ", colorTemp);
            updateState(CHANNEL_COLOR_TEMPERATURE, colorTemp);
        }
    }
}

---

From source file:org.eclipse.smarthome.binding.tradfri.handler.TradfriPlugHandler.java

License:Open Source License

@Override
public void onUpdate(JsonElement data) {
    if (active && !(data.isJsonNull())) {
        TradfriPlugData state = new TradfriPlugData(data);
        updateStatus(state.getReachabilityStatus() ? ThingStatus.ONLINE : ThingStatus.OFFLINE);

        updateState(CHANNEL_POWER, state.getOnOffState() ? OnOffType.ON : OnOffType.OFF);
        updateDeviceProperties(state);/*from w  w w. j a v a  2s.c  om*/
    }
}

---

From source file:org.eclipse.smarthome.binding.tradfri.handler.TradfriSensorHandler.java

License:Open Source License

@Override
public void onUpdate(JsonElement data) {
    if (active && !(data.isJsonNull())) {
        state = new TradfriSensorData(data);
        updateStatus(state.getReachabilityStatus() ? ThingStatus.ONLINE : ThingStatus.OFFLINE);

        DecimalType batteryLevel = state.getBatteryLevel();
        if (batteryLevel != null) {
            updateState(CHANNEL_BATTERY_LEVEL, batteryLevel);
        }/*  w  w w.j a  v  a2 s. c  om*/

        OnOffType batteryLow = state.getBatteryLow();
        if (batteryLow != null) {
            updateState(CHANNEL_BATTERY_LOW, batteryLow);
        }

        updateDeviceProperties(state);

        logger.debug(
                "Updating thing for sensorId {} to state {batteryLevel: {}, batteryLow: {}, firmwareVersion: {}, modelId: {}, vendor: {}}",
                state.getDeviceId(), batteryLevel, batteryLow, state.getFirmwareVersion(), state.getModelId(),
                state.getVendor());
    }
}

---

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