public class DateTimeCodec extends TypeCodec.AbstractTupleCodec<DateTime>
TypeCodec that maps
DateTime to CQL tuple<timestamp,varchar>,
providing a pattern for maintaining timezone information in
Cassandra.
Since Cassandra's timestamp type preserves only
milliseconds since epoch, any timezone information
would normally be lost. By using a
tuple<timestamp,varchar> a timezone ID can be
persisted in the varchar field such that when the
value is deserialized the timezone is
preserved.
IMPORTANT: this codec's format method formats
timestamps as CQL literal strings using an ISO-8601 format that includes milliseconds.
This format is incompatible with Cassandra versions < 2.0.9.TypeCodec.AbstractCollectionCodec<E,C extends Collection<E>>, TypeCodec.AbstractMapCodec<K,V>, TypeCodec.AbstractTupleCodec<T>, TypeCodec.AbstractUDTCodec<T>, TypeCodec.PrimitiveBooleanCodec, TypeCodec.PrimitiveByteCodec, TypeCodec.PrimitiveDoubleCodec, TypeCodec.PrimitiveFloatCodec, TypeCodec.PrimitiveIntCodec, TypeCodec.PrimitiveLongCodec, TypeCodec.PrimitiveShortCodecdefinition| Constructor and Description |
|---|
DateTimeCodec(TupleType tupleType)
Creates a new
DateTimeCodec for the given tuple,
using a default parser and a default printer to handle
the timestamp component of the tuple. |
DateTimeCodec(TupleType tupleType,
DateTimeFormatter parser,
DateTimeFormatter printer)
Creates a new
DateTimeCodec for the given tuple,
using the provided parser and printer
to format and print the timestamp component of the tuple. |
| Modifier and Type | Method and Description |
|---|---|
protected DateTime |
deserializeAndSetField(ByteBuffer input,
DateTime target,
int index,
ProtocolVersion protocolVersion)
Deserialize an individual field and set it on an object, as part of deserializing the whole
object from a CQL tuple (see
TypeCodec.AbstractTupleCodec.deserialize(ByteBuffer, ProtocolVersion)). |
protected String |
formatField(DateTime value,
int index)
Format an individual field in an object as a CQL literal, as part of formatting the whole object
(see
TypeCodec.AbstractTupleCodec.format(Object)). |
protected DateTime |
newInstance()
Return a new instance of
T. |
protected DateTime |
parseAndSetField(String input,
DateTime target,
int index)
Parse an individual field and set it on an object, as part of parsing the whole object
(see
TypeCodec.AbstractTupleCodec.parse(String)). |
protected ByteBuffer |
serializeField(DateTime source,
int index,
ProtocolVersion protocolVersion)
Serialize an individual field in an object, as part of serializing the whole object to a CQL
tuple (see
TypeCodec.AbstractTupleCodec.serialize(Object, ProtocolVersion)). |
accepts, deserialize, format, parse, serializeaccepts, accepts, accepts, ascii, bigint, blob, cboolean, cdouble, cfloat, cint, counter, custom, date, decimal, duration, getCqlType, getJavaType, inet, list, map, set, smallInt, time, timestamp, timeUUID, tinyInt, toString, tuple, userType, uuid, varchar, varintpublic DateTimeCodec(TupleType tupleType)
DateTimeCodec for the given tuple,
using a default parser and a default printer to handle
the timestamp component of the tuple.
The default formatter and printer produce and parse CQL timestamp literals of the following form:
Z (UTC), e.g. 2010-06-30T01:20:47.999Z;
note that timestamp components are always printed in UTC time, hence the zone ID Z.
Note that it is not possible to customize the parsing and printing of
the zone component of the tuple. This codec prints either a zone offset such as -07:00,
or a zone ID such as UTC or Europe/Paris,
depending on what is the best information is available.
tupleType - The tuple type this codec should handle.
It must be a tuple<timestamp,varchar>.IllegalArgumentException - if the provided tuple type is not a tuple<timestamp,varchar>.public DateTimeCodec(TupleType tupleType, DateTimeFormatter parser, DateTimeFormatter printer)
DateTimeCodec for the given tuple,
using the provided parser and printer
to format and print the timestamp component of the tuple.
Use this constructor if you intend to customize the way the codec parses and formats timestamps. Beware that Cassandra only accepts timestamp literals in some of the most common ISO-8601 formats; attempting to use non-standard formats could result in invalid CQL literals.
Note that it is not possible to customize the parsing and printing of
the zone component of the tuple. This codec prints either a zone offset such as -07:00,
or a zone ID such as UTC or Europe/Paris,
depending on what information is available.
tupleType - The tuple type this codec should handle.
It must be a tuple<timestamp,varchar>.parser - The parser to use
to parse the timestamp component of the tuple.
It should be lenient enough to accept most of the ISO-8601 formats
accepted by Cassandra as valid CQL literals.printer - The printer to use
to format the timestamp component of the tuple.
This printer should be configured to always format timestamps in UTC
(see DateTimeFormatter.withZoneUTC().IllegalArgumentException - if the provided tuple type is not a tuple<timestamp,varchar>.protected DateTime newInstance()
TypeCodec.AbstractTupleCodecT.newInstance in class TypeCodec.AbstractTupleCodec<DateTime>T.protected ByteBuffer serializeField(DateTime source, int index, ProtocolVersion protocolVersion)
TypeCodec.AbstractTupleCodecTypeCodec.AbstractTupleCodec.serialize(Object, ProtocolVersion)).serializeField in class TypeCodec.AbstractTupleCodec<DateTime>source - The object to read the field from.index - The index of the field.protocolVersion - The protocol version to use.null if that field should be ignored.protected DateTime deserializeAndSetField(ByteBuffer input, DateTime target, int index, ProtocolVersion protocolVersion)
TypeCodec.AbstractTupleCodecTypeCodec.AbstractTupleCodec.deserialize(ByteBuffer, ProtocolVersion)).deserializeAndSetField in class TypeCodec.AbstractTupleCodec<DateTime>input - The serialized form of the field.target - The object to set the field on.index - The index of the field.protocolVersion - The protocol version to use.target, but if you're dealing
with immutable types you'll need to return a different instance.protected String formatField(DateTime value, int index)
TypeCodec.AbstractTupleCodecTypeCodec.AbstractTupleCodec.format(Object)).formatField in class TypeCodec.AbstractTupleCodec<DateTime>value - The object to read the field from.index - The index of the field.protected DateTime parseAndSetField(String input, DateTime target, int index)
TypeCodec.AbstractTupleCodecTypeCodec.AbstractTupleCodec.parse(String)).parseAndSetField in class TypeCodec.AbstractTupleCodec<DateTime>input - The String to parse the field from.target - The value to write to.index - The index of the field.target, but if you're dealing
with immutable types you'll need to return a different instance.Copyright © 2012–2018. All rights reserved.