ColumnNameTypeValueDeserializer have issue when the jsonvalue is null

[zlxfamily]

public ColumnNameTypeValue deserialize(JsonElement element, Type type, JsonDeserializationContext ctx)
            throws JsonParseException {
        final JsonObject object = element.getAsJsonObject();

        String name = object.get("column").getAsString();
        ColumnType columnType = ColumnType.valueOf(object.get("type").getAsString());
        JsonElement jsonValue = object.get("value");
        Object value = null;
            switch (columnType) {
                case BOOLEAN:
                    value = jsonValue.getAsBoolean();
                    break;
                case DOUBLE:
                    value = jsonValue.getAsDouble();
                    break;
                case FLOAT:
                    value = jsonValue.getAsFloat();
                    break;
                case INTEGER:
                    value = jsonValue.getAsInt();
                    break;
                case LONG:
                    value = jsonValue.getAsLong();
                    break;
                case STRING:
                    value = jsonValue.getAsString();
                    break;
                default:
                    break;
            }


        return new ColumnNameTypeValue(name, columnType, value);
    }

when the jsonValue is null ,it will report a null point error!