org.springframework.http.converter

Interface GenericHttpMessageConverter<T>

All Superinterfaces:

HttpMessageConverter<T>

All Known Implementing Classes:

AbstractJackson2HttpMessageConverter, GsonHttpMessageConverter, Jaxb2CollectionHttpMessageConverter, MappingJackson2HttpMessageConverter, MappingJackson2XmlHttpMessageConverter

public interface GenericHttpMessageConverter<T>
extends HttpMessageConverter<T>

A specialization of HttpMessageConverter that can convert an HTTP request into a target object of a specified generic type.

Since:

3.2

Author:

Arjen Poutsma, Rossen Stoyanchev

See Also:

ParameterizedTypeReference

Method Summary

Modifier and Type	Method and Description
boolean	canRead(Type type, Class<?> contextClass, MediaType mediaType) Indicates whether the given type can be read by this converter.
T	read(Type type, Class<?> contextClass, HttpInputMessage inputMessage) Read an object of the given type form the given input message, and returns it.

Methods inherited from interface org.springframework.http.converter.HttpMessageConverter

canRead, canWrite, getSupportedMediaTypes, read, write

Method Detail

canRead

boolean canRead(Type type,
                Class<?> contextClass,
                MediaType mediaType)

Indicates whether the given type can be read by this converter.

Parameters:

type - the type to test for readability

contextClass - a context class for the target type, for example a class in which the target type appears in a method signature, can be null

mediaType - the media type to read, can be null if not specified. Typically the value of a Content-Type header.

Returns:

true if readable; false otherwise

read

T read(Type type,
       Class<?> contextClass,
       HttpInputMessage inputMessage)
throws IOException,
       HttpMessageNotReadableException

Read an object of the given type form the given input message, and returns it.

Parameters:

type - the type of object to return. This type must have previously been passed to the canRead method of this interface, which must have returned true.

contextClass - a context class for the target type, for example a class in which the target type appears in a method signature, can be null

inputMessage - the HTTP input message to read from

Returns:

the converted object

Throws:

IOException - in case of I/O errors

HttpMessageNotReadableException - in case of conversion errors