ru.yandex.clickhouse.response.parser

Class ClickHouseValueParser<T>

java.lang.Object

ru.yandex.clickhouse.response.parser.ClickHouseValueParser<T>

public abstract class ClickHouseValueParser<T>
extends Object

Constructor Summary

Constructors

Constructor and Description
ClickHouseValueParser()

Method Summary

Modifier and Type	Method and Description
protected T	getDefaultValue()
static <T> ClickHouseValueParser<T>	getParser(Class<T> clazz)
static long	normalizeTime(ClickHouseColumnInfo info, long time)
abstract T	parse(ByteFragment value, ClickHouseColumnInfo columnInfo, TimeZone timeZone) Parses the supplied byte fragment value using meta data contained in columnInfo.
static boolean	parseBoolean(ByteFragment value, ClickHouseColumnInfo columnInfo)
static double	parseDouble(ByteFragment value, ClickHouseColumnInfo columnInfo)
static float	parseFloat(ByteFragment value, ClickHouseColumnInfo columnInfo)
static int	parseInt(ByteFragment value, ClickHouseColumnInfo columnInfo)
static long	parseLong(ByteFragment value, ClickHouseColumnInfo columnInfo)
static short	parseShort(ByteFragment value, ClickHouseColumnInfo columnInfo)
T	parseWithDefault(ByteFragment value, ClickHouseColumnInfo columnInfo, TimeZone resultTimeZone) Parses the supplied byte fragment value using meta data contained in columnInfo.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClickHouseValueParser

public ClickHouseValueParser()

Method Detail

normalizeTime

public static long normalizeTime(ClickHouseColumnInfo info,
                                 long time)

getParser

public static <T> ClickHouseValueParser<T> getParser(Class<T> clazz)
                                              throws SQLException

Throws:

SQLException

parseInt

public static final int parseInt(ByteFragment value,
                                 ClickHouseColumnInfo columnInfo)
                          throws SQLException

Throws:

SQLException

parseLong

public static final long parseLong(ByteFragment value,
                                   ClickHouseColumnInfo columnInfo)
                            throws SQLException

Throws:

SQLException

parseBoolean

public static final boolean parseBoolean(ByteFragment value,
                                         ClickHouseColumnInfo columnInfo)
                                  throws SQLException

Throws:

SQLException

parseShort

public static final short parseShort(ByteFragment value,
                                     ClickHouseColumnInfo columnInfo)
                              throws SQLException

Throws:

SQLException

parseDouble

public static final double parseDouble(ByteFragment value,
                                       ClickHouseColumnInfo columnInfo)
                                throws SQLException

Throws:

SQLException

parseFloat

public static final float parseFloat(ByteFragment value,
                                     ClickHouseColumnInfo columnInfo)
                              throws SQLException

Throws:

SQLException

parse

public abstract T parse(ByteFragment value,
                        ClickHouseColumnInfo columnInfo,
                        TimeZone timeZone)
                 throws SQLException

Parses the supplied byte fragment value using meta data contained in columnInfo. Date / time parsing uses resultTimeZone, unless only local values are involved.

Parameters:

value - value as returned from the server

columnInfo - meta data of the column

timeZone - time zone to be used when parsing dates or times

Returns:

the result of parsing value as an object of type T

Throws:

SQLException - if the value cannot be parsed under the given circumstances

parseWithDefault

public T parseWithDefault(ByteFragment value,
                          ClickHouseColumnInfo columnInfo,
                          TimeZone resultTimeZone)
                   throws SQLException

Parses the supplied byte fragment value using meta data contained in columnInfo. Date / time parsing uses resultTimeZone, unless only local values are involved.

If the result would be null, this method will check if there is a default value in place which should be returned instead. The default value depends on the class. This method is intended to be used when parsing numeric values which later need to be converted to primitive, e.g. int or float.

Parameters:

value - value as returned from the server or a default value

columnInfo - meta data of the column

resultTimeZone - time zone to be used when parsing dates or times

Returns:

the result of parsing value as an object of type T

Throws:

SQLException - if the value cannot be parsed under the given circumstances

getDefaultValue

protected T getDefaultValue()