Prior to this commit, if a Spring Expression Language (SpEL) expression
referenced the root context object via the #root or #this variable, we
inserted a checkcast in the generated byte code that cast the object to
its concrete type. However if the root context object's type was
non-public, that resulted in an IllegalAccessError when the compiled
byte code was executed.
VariableReference.getValueInternal() already contains a solution for
global variables which inserts a checkcast to Object in the generated
byte code instead of to the object's concrete non-public type.
This commit therefore applies the same logic to #root (or #this when
used to reference the root context object) that is already applied to
global variables.
Closes gh-32356
For consistency with other examples, this commit omits `method` parameter
names in the "Migrating from RestTemplate to RestClient" section of the
reference docs.
Closes gh-32335
Although EvaluationContext defines the API for setting and looking up
variables, the internals of the Spring Expression Language (SpEL)
actually provide explicit support for registering functions as
variables.
This is self-evident in the two registerFunction() variants in
StandardEvaluationContext; however, functions can also be registered as
variables when using the SimpleEvaluationContext.
Since custom functions are also viable in use cases involving the
SimpleEvaluationContext, this commit documents that functions may be
registered in a SimpleEvaluationContext via setVariable().
This commit also explicitly documents the "function as a variable"
behavior in the class-level Javadoc for both StandardEvaluationContext
and SimpleEvaluationContext, as well as in the reference manual.
Closes gh-32258
This commit focuses on improving the AOT section on programmatic
registration of additional beans. This makes it more clear that a
`BeanDefinitionRegistry` must be used and that singletons are not
processed.
Closes gh-32240
Closes gh-32241
Brian Clozel
rstoyanchev
Juergen Hoeller
Sébastien Deleuze
Seungrae Kim
Sam Brannen
Johnny Lim
Stéphane Nicoll
Arjen Poutsma
kexin.an
Minsung Oh
Linor Dolev
ZeroCyan
Cirus Thenter
Olga MaciaszekSharma
Spencer Gibb
John Gesimondo
anil.senocak