Resolve nested bean properties with generic context - #37276
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Retain the declaring property type when creating nested bean wrappers, and use its generic context for property and container conversions. Preserve more specific types supplied by concrete runtime classes. Closes spring-projectsgh-27760 Signed-off-by: Hyun Lee <dlwhdugs4147@gmail.com>
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Closes gh-27760.
Nested properties such as
Filter<State>.valuelose their declared enum type when binding moves into theFilterinstance. Binding then stores a String or fails against the raw Enum bound.Preserve the enclosing property's generic context in nested bean wrappers and use it for property and container conversion. Keep more specific runtime-class types and keep contextual descriptors separate from shared introspection metadata. No public API is added.
Validation (JDK 25):
spring-beanssuite: 2,306 tests, no failures, 9 existing skips.DataBinderTests: 81 tests, no failures.spring-beansCheckstyle checks pass.Coverage includes bounded and unbounded enum parameters, nested beans, list/map entries, optional values, arrays, distinct generic declarations, conversion services and runtime subclasses.