Package org.springframework.web.client

Interface ResponseExtractor<T>

Type Parameters:

T - the data type

All Known Implementing Classes:

HttpMessageConverterExtractor

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface ResponseExtractor<T>

Generic callback interface used by RestTemplate's retrieval methods. Implementations of this interface perform the actual work of extracting data from a ClientHttpResponse, but don't need to worry about exception handling or closing resources.

Used internally by the RestTemplate, but also useful for application code. There is one available factory method, see RestTemplate.responseEntityExtractor(Type).

Since:

3.0

Author:

Arjen Poutsma

See Also:

• RestTemplate.execute(java.lang.String, org.springframework.http.HttpMethod, org.springframework.web.client.RequestCallback, org.springframework.web.client.ResponseExtractor<T>, java.lang.Object...)

Method Summary

Modifier and Type	Method	Description
T	extractData(ClientHttpResponse response)	Extract data from the given ClientHttpResponse and return it.

Method Details

extractData

@Nullable
T extractData(ClientHttpResponse response)
       throws IOException

Extract data from the given ClientHttpResponse and return it.

Parameters:

response - the HTTP response

Returns:

the extracted data

Throws:

IOException - in case of I/O errors