程序包 cn.taketoday.core.conversion.support

类 ObjectToOptionalConverter

java.lang.Object

cn.taketoday.core.conversion.support.ObjectToOptionalConverter

所有已实现的接口:

ConditionalConverter, ConditionalGenericConverter, GenericConverter

final class ObjectToOptionalConverter
extends Object
implements ConditionalGenericConverter

Convert an Object to java.util.Optional<T> if necessary using the ConversionService to convert the source Object to the generic type of Optional when known.

从以下版本开始:

4.0

作者:

Rossen Stoyanchev, Juergen Hoeller, Harry Yang

嵌套类概要

嵌套类

修饰符和类型	类	说明
private static class	ObjectToOptionalConverter.GenericTypeDescriptor

从接口继承的嵌套类/接口 cn.taketoday.core.conversion.GenericConverter

GenericConverter.ConvertiblePair

字段概要

字段

修饰符和类型	字段	说明
private final ConversionService	conversionService

构造器概要

构造器

构造器	说明
ObjectToOptionalConverter(ConversionService conversionService)

方法概要

修饰符和类型	方法	说明
Object	convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType)	Convert the source object to the targetType described by the TypeDescriptor.
Set<GenericConverter.ConvertiblePair>	getConvertibleTypes()	Return the source and target types that this converter can convert between.
boolean	matches(TypeDescriptor sourceType, TypeDescriptor targetType)	Should the conversion from sourceType to targetType currently under consideration be selected?

从类继承的方法 java.lang.Object

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

字段详细资料

conversionService

private final ConversionService conversionService

构造器详细资料

ObjectToOptionalConverter

public ObjectToOptionalConverter(ConversionService conversionService)

方法详细资料

getConvertibleTypes

public Set<GenericConverter.ConvertiblePair> getConvertibleTypes()

从接口复制的说明: GenericConverter

Return the source and target types that this converter can convert between.

Each entry is a convertible source-to-target type pair.

For conditional converters this method may return null to indicate all source-to-target pairs should be considered.

指定者:

getConvertibleTypes 在接口中 GenericConverter

matches

public boolean matches(TypeDescriptor sourceType,
 TypeDescriptor targetType)

从接口复制的说明: ConditionalConverter

Should the conversion from sourceType to targetType currently under consideration be selected?

指定者:

matches 在接口中 ConditionalConverter

参数:

sourceType - the type descriptor of the field we are converting from

targetType - the type descriptor of the field we are converting to

返回:

true if conversion should be performed, false otherwise

convert

public Object convert(@Nullable
 Object source,
 TypeDescriptor sourceType,
 TypeDescriptor targetType)

从接口复制的说明: GenericConverter

Convert the source object to the targetType described by the TypeDescriptor.

指定者:

convert 在接口中 GenericConverter

参数:

source - the source object to convert (may be null)

sourceType - the type descriptor of the field we are converting from

targetType - the type descriptor of the field we are converting to

返回:

the converted object