Fix RootUriTemplateHandler to apply rootUri for empty URI templates #48364
+25
−4
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See #48337
Fix bug in RootUriTemplateHandler where rootUri was not applied for empty URI templates (""). Previously, apply() only prefixed rootUri for paths starting with /.
Update apply() to return rootUri when the URI template is empty, ensuring consistent behavior with RestTemplateBuilder.rootUri() in @HttpExchange methods.
Add unit test uriStringWhenEmptyShouldReturnRoot() in RootUriBuilderFactoryTests to verify this behavior.
These changes ensure that both empty and non-empty URI templates are handled correctly.