IntelliJ IDEA Annotation processors: "Obtain processors from project classpath"

Question

What does the "Obtain processors from project classpath" option in the annotation processor settings mean? If I understand the option "Obtain processors from project classpath" correctly, it should scan the classpath and find all annotation processors automatically.

However, this doesn't seem to work that way. I have a project with annotation processors added to the project classpath (android annotations). When selecting "Obtain processors from project classpath", they are not executed. I must specify them explicitly in the "Processor path" to get them working.

When I run the build in maven, the annotation processors are executed.

Is this a bug in IntelliJ IDEA or am I just understanding the setting wrong?

Answer 1

There was an issue with the annotation processors in IntelliJ. I've filed a bug and they fixed it in IDEA 12.1:
http://youtrack.jetbrains.com/issue/IDEA-94749