Issue: SPR-13776

Issue: SPR-13746

Issue: SPR-13769

Issue: SPR-13774

Issue: SPR-13772

Issue: SPR-13696

Issue: SPR-13763

Issue: SPR-13765

Issue: SPR-13764

AnnotationConfigWebApplicationContext allows for custom AnnotatedBeanDefinitionReader/ClassPathBeanDefinitionScanner

Issue: SPR-9324

Issue: SPR-13762

Issue: SPR-13761

Issue: SPR-13760

Issue: SPR-13759

Includes a trivial refinement of RestTemplate's ResourceAccessException message.

Issue: SPR-13755

Issue: SPR-13755

Issue: SPR-13745

Issue: SPR-13753

Issue: SPR-13750

Issue: SPR-13752

Fixed a bug where the URL content negotiation "format" parameter values
were case sensitive and only lowercase values were accepted. For
example, URL query parameter format=json returned the appropriate JSON
response but format=JSON resulted in a
HttpMediaTypeNotAcceptableException and returned:

406 - The resource identified by this request is only capable of
generating responses with characteristics not acceptable according to
the request "accept" headers.

When the MappingMediaTypeFileExtensionResolver is constructed, it is
passed a map containing the media type key to MediaType mappings
defined in the ContentNegotiationConfigurer. In the constructor of
MappingMediaTypeFileExtensionResolver, the keys are converted to
lowercase and the mappings of keys to MediaTypes are added to the
ConcurrentMap<String, MediaType> mediaTypes using the lowercase
version of the keys. However, when retrieving the MediaType from a key
in the lookupMediaType method, no conversion to lowercase is performed
so any value for the URL "format" parameter other than the lowercase
version will not return the proper MediaType result.

On May 1st, 2014, a change was made to
ParameterContentNegotiationStrategy to handle cases where the content
negotiation format URL parameter does not result in a match for a
MediaType. If no match is found, a HttpMediaTypeNotAcceptableException
is thrown resulting in the 406 response above. Prior to this commit, a
null was returned instead of throwing an exception so this issue was
hidden and appeared to function correctly.

To make the media type lookup case insensitive, added a line to the
lookupMediaType method in MediaTypeFileExtensionResolver to first
convert the extension (media type key) to lowercase prior to attempting
to retrieve it from the mediaTypes map.

Issue: SPR-13747

This commit reworks the arrangement to a centralized cache, avoiding any extra reflection attempts if a cache entry is known already. In the course of this, it also enforces toXXX methods to be declared as non-static now (which is the only sensible arrangement anyway).

Issue: SPR-13703

Prior to this change, the resource handling FixedVersionStrategy would
be applied on all links that match the configured pattern. This is
problematic for relative links and can lead to rewritten links such as
"/fixedversion/../css/main.css" which breaks.

This commit prevents that Strategy from being applied to such links.
Of course, one should avoid to use that VersionStrategy with relative
links, but this change aims at not breaking existing links even if it
means not prefixing the version as expected.

Issue: SPR-13727

Issue: SPR-12926

The recent commit 971f04 replaced the use of a NAMES_PATTERN regex in
favor of direct parsing in order to deal with nested curly braces.

The change also incorrectly replicated this logic which removes a
trailing slash after Pattern quoting (and not before):

https://github.com/spring-projects/spring-framework/blob/cca037a74df9b87f99858154b47696a9eccf69c8/spring-web/src/main/java/org/springframework/web/util/UriTemplate.java#L207-L210

After some more investigation there doesn't appear to be any scenario
where the quoted pattern would end with a trailing slash. It should
always end with \E (end of quote) or a ")" (end of group). Nor are
there any failing tests so this commit removes the logic altogether.

Issue: SPR-13705

This commit undoes the previous refinement and rather documents the original behavior.

Issue: SPR-13739