Use generics for providers API
Using generics for the providers API allows a type to be associated
with a ProviderKey, resulting in a type-safe API without that doesn't
require runtime type assertions by every caller.
Unfortunately, Go does not allow generic types in methods, only in
functions [1]. This prevents a type-safe API on ModuleContext, and
requires moving the API to be functions that take a ModuleContext as
a parameter.
This CL creates the new API, but doesn't convert all of the callers.
[1] https://go.googlesource.com/proposal/+/refs/heads/master/design/43651-type-parameters.md#no-parameterized-methods)
Bug: 316410648
Test: builds
Change-Id: I3e30d68b966b730efd968166a38a25cc144bd6de
diff --git a/java/classpath_element.go b/java/classpath_element.go
index 4962916..af99fb4 100644
--- a/java/classpath_element.go
+++ b/java/classpath_element.go
@@ -72,8 +72,8 @@
// ClasspathElementContext defines the context methods needed by CreateClasspathElements
type ClasspathElementContext interface {
- OtherModuleHasProvider(m blueprint.Module, provider blueprint.ProviderKey) bool
- OtherModuleProvider(m blueprint.Module, provider blueprint.ProviderKey) interface{}
+ OtherModuleHasProvider(m blueprint.Module, provider blueprint.AnyProviderKey) bool
+ OtherModuleProvider(m blueprint.Module, provider blueprint.AnyProviderKey) interface{}
ModuleErrorf(fmt string, args ...interface{})
}