java.lang.Object
- org.springframework.messaging.rsocket.DefaultMetadataExtractor

All Implemented Interfaces:
MetadataExtractor, MetadataExtractorRegistry
```
public class DefaultMetadataExtractor
extends Object
implements MetadataExtractor, MetadataExtractorRegistry
```
Default MetadataExtractor implementation that relies on Decoders to deserialize the content of metadata entries.
By default only "message/x.rsocket.routing.v0"" is extracted and saved under MetadataExtractor.ROUTE_KEY. Use metadataToExtract methods to specify other metadata mime types of interest to extract.
Since:
5.2
Author:
Rossen Stoyanchev

Field Summary
- Fields inherited from interface org.springframework.messaging.rsocket.MetadataExtractor
  ROUTE_KEY

Constructor Summary

Constructors
Constructor	Description
`DefaultMetadataExtractor(List<Decoder<?>> decoders)`	Constructor with list of decoders for de-serializing metadata entries.
`DefaultMetadataExtractor(Decoder<?>... decoders)`	Constructor with decoders for de-serializing metadata entries.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Map<String,Object>`	`extract(io.rsocket.Payload payload, MimeType metadataMimeType)`	Extract a map of values from the given `Payload` metadata.
`List<? extends Decoder<?>>`	`getDecoders()`	Return a read-only list with the configured decoders.
`<T> void`	`metadataToExtract(MimeType mimeType, Class<T> targetType, BiConsumer<T,Map<String,Object>> mapper)`	Variant of `MetadataExtractorRegistry.metadataToExtract(MimeType, Class, String)` that allows custom logic to be used to map the decoded value to any number of values in the output map.
`<T> void`	`metadataToExtract(MimeType mimeType, ParameterizedTypeReference<T> type, BiConsumer<T,Map<String,Object>> mapper)`	Variant of `MetadataExtractorRegistry.metadataToExtract(MimeType, Class, BiConsumer)` that accepts `ParameterizedTypeReference` instead of `Class` for specifying a target type with generic parameters.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.messaging.rsocket.MetadataExtractorRegistry
metadataToExtract, metadataToExtract

- Constructor Detail
  - DefaultMetadataExtractor
```
public DefaultMetadataExtractor(Decoder<?>... decoders)
```
    Constructor with decoders for de-serializing metadata entries.
  - DefaultMetadataExtractor
```
public DefaultMetadataExtractor(List<Decoder<?>> decoders)
```
    Constructor with list of decoders for de-serializing metadata entries.
- Method Detail
  - getDecoders
```
public List<? extends Decoder<?>> getDecoders()
```
    Return a read-only list with the configured decoders.
  - metadataToExtract
```
public <T> void metadataToExtract(MimeType mimeType,
                                  Class<T> targetType,
                                  BiConsumer<T,Map<String,Object>> mapper)
```
    Description copied from interface: MetadataExtractorRegistry
    Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, String) that allows custom logic to be used to map the decoded value to any number of values in the output map.
    Specified by:
    metadataToExtract in interface MetadataExtractorRegistry
    Type Parameters:
    T - the target value type
    Parameters:
    mimeType - the mime type of metadata entries to extract
    targetType - the target value type to decode to
    mapper - custom logic to add the decoded value to the output map
  - metadataToExtract
```
public <T> void metadataToExtract(MimeType mimeType,
                                  ParameterizedTypeReference<T> type,
                                  BiConsumer<T,Map<String,Object>> mapper)
```
    Description copied from interface: MetadataExtractorRegistry
    Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, BiConsumer) that accepts ParameterizedTypeReference instead of Class for specifying a target type with generic parameters.
    Specified by:
    metadataToExtract in interface MetadataExtractorRegistry
    Type Parameters:
    T - the target value type
    Parameters:
    mimeType - the mime type of metadata entries to extract
    type - the target value type to decode to
    mapper - custom logic to add the decoded value to the output map
  - extract
```
public Map<String,Object> extract(io.rsocket.Payload payload,
                                        MimeType metadataMimeType)
```
    Description copied from interface: MetadataExtractor
    Extract a map of values from the given Payload metadata. The Payload "route", if present, should be saved under MetadataExtractor.ROUTE_KEY.
    Specified by:
    extract in interface MetadataExtractor
    Parameters:
    payload - the payload whose metadata should be read
    metadataMimeType - the metadata MimeType for the connection.
    Returns:
    name values pairs extracted from the metadata

Class DefaultMetadataExtractor

Field Summary

Fields inherited from interface org.springframework.messaging.rsocket.MetadataExtractor

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.springframework.messaging.rsocket.MetadataExtractorRegistry

Constructor Detail

DefaultMetadataExtractor

DefaultMetadataExtractor

Method Detail

getDecoders

metadataToExtract

metadataToExtract

extract