org.apache.dubbo.common.convert

接口 Converter<S,T>

类型参数:

S - The source type

T - The target type

所有超级接口:

Comparable<Prioritized>, Prioritized

所有已知子接口:

StringConverter<T>

所有已知实现类:

StringToBooleanConverter, StringToCharacterConverter, StringToCharArrayConverter, StringToDoubleConverter, StringToFloatConverter, StringToIntegerConverter, StringToLongConverter, StringToOptionalConverter, StringToShortConverter, StringToStringConverter

函数接口:

这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

@SPI
 @FunctionalInterface
public interface Converter<S,T>
extends Prioritized

A class to convert the source-typed value to the target-typed value

从以下版本开始:

2.7.6

字段概要

从接口继承的字段 org.apache.dubbo.common.lang.Prioritized

COMPARATOR, MAX_PRIORITY, MIN_PRIORITY, NORMAL_PRIORITY

方法概要

限定符和类型	方法和说明
default boolean	accept(Class<?> sourceType, Class<?> targetType) Accept the source type and target type or not
T	convert(S source) Convert the source-typed value to the target-typed value
static <T> T	convertIfPossible(Object source, Class<T> targetType) Convert the value of source to target-type value if possible
static Converter<?,?>	getConverter(Class<?> sourceType, Class<?> targetType) Get the Converter instance from ExtensionLoader with the specified source and target type
default Class<S>	getSourceType() Get the source type
default Class<T>	getTargetType() Get the target type

从接口继承的方法 org.apache.dubbo.common.lang.Prioritized

compareTo, getPriority

方法详细资料

accept

default boolean accept(Class<?> sourceType,
                       Class<?> targetType)

Accept the source type and target type or not

参数:

sourceType - the source type

targetType - the target type

返回:

if accepted, return true, or false

convert

T convert(S source)

Convert the source-typed value to the target-typed value

参数:

source - the source-typed value

返回:

the target-typed value

getSourceType

default Class<S> getSourceType()

Get the source type

返回:

non-null

getTargetType

default Class<T> getTargetType()

Get the target type

返回:

non-null

getConverter

static Converter<?,?> getConverter(Class<?> sourceType,
                                   Class<?> targetType)

Get the Converter instance from ExtensionLoader with the specified source and target type

参数:

sourceType - the source type

targetType - the target type

返回:

另请参阅:

ExtensionLoader.getSupportedExtensionInstances()

convertIfPossible

static <T> T convertIfPossible(Object source,
                               Class<T> targetType)

Convert the value of source to target-type value if possible

类型参数:

T - the target type

参数:

source - the value of source

targetType - the target type

返回:

null if can't be converted

从以下版本开始:

2.7.8