程序包 cn.taketoday.core.conversion.support

类 StreamConverter

java.lang.Object

cn.taketoday.core.conversion.support.StreamConverter

所有已实现的接口:

ConditionalConverter, ConditionalGenericConverter, GenericConverter

class StreamConverter
extends Object
implements ConditionalGenericConverter

Converts a Stream to and from a collection or array, converting the element type if necessary.

从以下版本开始:

4.0

作者:

Stephane Nicoll

嵌套类概要

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
private static final TypeDescriptor	STREAM_TYPE

构造器概要

构造器

构造器	说明
StreamConverter(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.
private Object	convertFromStream(Stream<?> source, TypeDescriptor streamType, TypeDescriptor targetType)
private Object	convertToStream(Object source, TypeDescriptor sourceType, TypeDescriptor streamType)
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?
boolean	matchesFromStream(TypeDescriptor elementType, TypeDescriptor targetType)	Validate that a Collection of the elements held within the stream can be converted to the specified targetType.
boolean	matchesToStream(TypeDescriptor elementType, TypeDescriptor sourceType)	Validate that the specified sourceType can be converted to a Collection of the type of the stream elements.

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

STREAM_TYPE

private static final TypeDescriptor STREAM_TYPE

conversionService

private final ConversionService conversionService

构造器详细资料

StreamConverter

StreamConverter(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

matchesFromStream

public boolean matchesFromStream(@Nullable
 TypeDescriptor elementType,
 TypeDescriptor targetType)

Validate that a Collection of the elements held within the stream can be converted to the specified targetType.

参数:

elementType - the type of the stream elements

targetType - the type to convert to

matchesToStream

public boolean matchesToStream(@Nullable
 TypeDescriptor elementType,
 TypeDescriptor sourceType)

Validate that the specified sourceType can be converted to a Collection of the type of the stream elements.

参数:

elementType - the type of the stream elements

sourceType - the type to convert from

convert

@Nullable
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

convertFromStream

@Nullable
private Object convertFromStream(@Nullable
 Stream<?> source,
 TypeDescriptor streamType,
 TypeDescriptor targetType)

convertToStream

private Object convertToStream(@Nullable
 Object source,
 TypeDescriptor sourceType,
 TypeDescriptor streamType)