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Document StandardTypeLocator configuration to support user types

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Prior to this commit, it was unclear to users and third parties that it
is necessary to manually configure a StandardTypeLocator with a
specific ClassLoader to ensure that the SpEL expression parser is able
to reliably locate user types.

For example, the StandardBeanExpressionResolver in the spring-context
module configures a StandardTypeLocator using the bean ClassLoader of
the corresponding BeanFactory.

This commit improves the documentation to raise awareness of this fact.

Closes gh-26253
This commit is contained in:
Sam Brannen
2023-09-08 17:12:16 +02:00
parent 1227fe5774
commit 10de295a72
3 changed files with 46 additions and 6 deletions
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10
framework-docs/modules/ROOT/pages/core/expressions/language-ref/types.adoc
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@@ -38,5 +38,15 @@ Kotlin::
----
======
[NOTE]
====
If your application or framework manages its own `EvaluationContext`, you may need to
manually configure a `StandardTypeLocator` with a specific `ClassLoader` to ensure that
the SpEL expression parser is able to reliably locate user types.
For example, the `StandardBeanExpressionResolver` in the `spring-context` module
configures a `StandardTypeLocator` using the bean `ClassLoader` of the corresponding
`BeanFactory`.
====