In Dagger 2 this is called {{Lazy}}:
https://google.github.io/dagger/api/latest/dagger/Lazy.html
A simple and naive CDI impl:
https://github.com/mkouba/dagger2cdi/blob/master/src/main/java/org/jboss/dagger2cdi/LazyAdaptor.java
NOTE: This impl does not handle qualifiers correctly. To make this work we would have to detect all injection points with {{Lazy}} required type, collect all qualifiers used and add those to the set of qualifiers of the {{LazyAdaptor}} bean.
This probably only makes sense for {{@Dependent}} beans. The difference between {{Lazy}} and {{Instance/Provider}} would be that for Lazy the bean instance would only be obtained once. |
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