com.datastax.driver.extras.codecs.guava

Class OptionalCodec<T>

java.lang.Object

com.datastax.driver.core.TypeCodec<O>

com.datastax.driver.extras.codecs.MappingCodec<Optional<T>,T>

com.datastax.driver.extras.codecs.guava.OptionalCodec<T>

Type Parameters:

T - The wrapped Java type

public class OptionalCodec<T>
extends MappingCodec<Optional<T>,T>

A codec that wraps other codecs around Guava's Optional API.

Nested Class Summary

Nested classes/interfaces inherited from class com.datastax.driver.core.TypeCodec

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.PrimitiveShortCodec

Field Summary

Fields inherited from class com.datastax.driver.extras.codecs.MappingCodec

innerCodec

Fields inherited from class com.datastax.driver.core.TypeCodec

cqlType, javaType

Constructor Summary

Constructors

Constructor and Description
OptionalCodec(TypeCodec<T> codec)
OptionalCodec(TypeCodec<T> codec, Predicate<T> isAbsent)

Method Summary

Modifier and Type	Method and Description
protected T	absentValue()
protected Optional<T>	deserialize(T value)
protected boolean	isAbsent(T value)
protected T	serialize(Optional<T> value)

Methods inherited from class com.datastax.driver.extras.codecs.MappingCodec

deserialize, format, parse, serialize

Methods inherited from class com.datastax.driver.core.TypeCodec

accepts, accepts, 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, varint

Methods inherited from class java.lang.Object

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

Constructor Detail

OptionalCodec

public OptionalCodec(TypeCodec<T> codec)

OptionalCodec

public OptionalCodec(TypeCodec<T> codec,
                     Predicate<T> isAbsent)

Method Detail

deserialize

protected Optional<T> deserialize(T value)

Specified by:

deserialize in class MappingCodec<Optional<T>,T>

serialize

protected T serialize(Optional<T> value)

Specified by:

serialize in class MappingCodec<Optional<T>,T>

absentValue

protected T absentValue()

isAbsent

protected boolean isAbsent(T value)