hugegraph-spark-connector/src/main/java/org/apache/hugegraph/spark/connector/utils/DataTypeUtils.java [144:172]:
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    private static Number parseNumber(String key, Object value, DataType dataType) {
        E.checkState(dataType.isNumber(), "The target data type must be number");

        if (dataType.clazz().isInstance(value)) {
            return (Number) value;
        }
        try {
            switch (dataType) {
                case BYTE:
                    return Byte.valueOf(value.toString());
                case INT:
                    return Integer.valueOf(value.toString());
                case LONG:
                    return parseLong(value.toString());
                case FLOAT:
                    return Float.valueOf(value.toString());
                case DOUBLE:
                    return Double.valueOf(value.toString());
                default:
                    throw new AssertionError(String.format("Number type only contains Byte, " +
                                                           "Integer, Long, Float, Double, " +
                                                           "but got %s", dataType.clazz()));
            }
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException(String.format("Failed to convert value(key=%s) " +
                                                             "'%s'(%s) to Number", key, value,
                                                             value.getClass()), e);
        }
    }
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hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DataTypeUtil.java [262:290]:
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    private static Number parseNumber(String key, Object value, DataType dataType) {
        E.checkState(dataType.isNumber(), "The target data type must be number");

        if (dataType.clazz().isInstance(value)) {
            return (Number) value;
        }
        try {
            switch (dataType) {
                case BYTE:
                    return Byte.valueOf(value.toString());
                case INT:
                    return Integer.valueOf(value.toString());
                case LONG:
                    return parseLong(value.toString());
                case FLOAT:
                    return Float.valueOf(value.toString());
                case DOUBLE:
                    return Double.valueOf(value.toString());
                default:
                    throw new AssertionError(String.format("Number type only contains Byte, " +
                                                           "Integer, Long, Float, Double, " +
                                                           "but got %s", dataType.clazz()));
            }
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException(String.format("Failed to convert value(key=%s) " +
                                                             "'%s'(%s) to Number", key, value,
                                                             value.getClass()), e);
        }
    }
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