ContentTypeResolver (Spring Framework 5.2.12.RELEASE API)

All Known Implementing Classes:
DefaultContentTypeResolver
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 ContentTypeResolver
```
Resolve the content type for a message.
Since:
4.0
Author:
Rossen Stoyanchev

- Method Summary
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  MimeType resolve(MessageHeaders headers)
  Determine the MimeType of a message from the given MessageHeaders.

- Method Detail
  - resolve
```
@Nullable
MimeType resolve(@Nullable
                 MessageHeaders headers)
          throws InvalidMimeTypeException
```
    Determine the MimeType of a message from the given MessageHeaders.
    Parameters:
    headers - the headers to use for the resolution
    Returns:
    the resolved MimeType, or null if none found
    Throws:
    InvalidMimeTypeException - if the content type is a String that cannot be parsed
    IllegalArgumentException - if there is a content type but its type is unknown