请参见存储库扫描中的Maven依赖关系（jQAssistant）

Question

I ran a jQAssistant scan on my Maven repository. Now I can see some information, but unfortunately, if I try

MATCH (a:Maven:Artifact) --> (b:Maven:Artifact) RETURN a

I see no results although there should be DEPENDS_ON connections between Artifacts. Is there some extra switch for the scan to also find these arcs?

Answer 1

If you're scanning a Maven repository there are no direct dependencies between artifacts, this is only the case if you're scanning a Maven reactor (ie using the Maven plugin). In case of a repository you have the following structure:

• (:Repository)-[:CONTAINS_POM]->(:Pom)
• (:Pom)-[:DESCRIBES]->(:Artifact)
• (:Pom)-[:DECLARES_DEPENDENCY]->(:Artifact)

The following query returns all Poms, the artifacts which each of them describes and the dependencies that are declared:

MATCH
  (:Repository)-[:CONTAINS_POM]->(pom:Pom),
  (pom)-[DESCRIBES]->(artifact:Artifact),
  (pom)-[:DECLARES_DEPENDENCY]->(dependency:Artifact)
RETURN
  pom.fqn, collect(artifact.name), collect(dependency.fqn)