javajqassistant

JQAssistant - is it possible to query for the value of annotation attributes?

We are thinking about doing some JQAssistant concepts/rules based on the values of annotation attributes.

Can these values be queried and evaluated with JQAssistant?

Example: Find all classes that have methods that are annotated with 

@javax.ejb.TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
Solution

  • The following query returns all types annotated by @TransactionAttribute and the value:

    MATCH (t:Type)-[:ANNOTATED_BY]->(txAttribute)-[:OF_TYPE]->(:Type{fqn:"javax.ejb.TransactionAttribute"}), (txAttribute)-[:HAS]->(:Value{name:"value"})-[:IS]->(txAttributeType:Field) RETURN t.fqn, txAttributeType.signature

    The result looks like this:

    "your.project.a.impl.ServiceAImpl" "javax.ejb.TransactionAttributeType REQUIRES_NEW"

    The returned value is the signature of the according field declared in the enum type TransactionAttributeType.