Programmatically retrieve all Maven dependencies

Question

How can I in an very easy way retrieve all direct and transitive dependencies for a given Maven POM in my own Java program?

I aware of the existing questions on Stackoverflow, especially the one using Ivy to resolve the dependencies. I am looking for a solution using Maven, which is able also to resolve the transitive dependencies.

Answer 1

I was now able to solve the problem by using JBoss Shrinkwrap.

Here is a code snipped similar to the one I now use in my tools:

MavenStrategyStage resolve = 
    Maven.configureResolver()
         // do not consult Maven Central or any other repository
         .workOffline()
         // import the configuration of the given settings.xml
         .fromFile(homeDir + "/jqa-release-environment/maven-settings.xml")
         // load the POM you would like to analyse
         .loadPomFromFile(pomFile)
         .importCompileAndRuntimeDependencies()
         .importRuntimeAndTestDependencies()
         .resolve();

MavenWorkingSession mavenWorkingSession = 
    ((MavenWorkingSessionContainer) resolve).getMavenWorkingSession();

List<MavenDependency> dependencies = new ArrayList<>();
dependencies.addAll(mavenWorkingSession.getDependenciesForResolution());
dependencies.addAll(mavenWorkingSession.getDependencyManagement());

To be able to use Shrinkwrap, I added the following dependencies to my POM.

<dependency>
    <groupId>org.jboss.shrinkwrap.resolver</groupId>
    <artifactId>shrinkwrap-resolver-depchain</artifactId>
    <type>pom</type>
    <version>3.1.4</version>
</dependency>
<dependency>
    <groupId>org.jboss.shrinkwrap.resolver</groupId>
    <artifactId>shrinkwrap-resolver-impl-maven</artifactId>
    <version>3.1.4</version>
</dependency>
<dependency>
    <groupId>org.jboss.shrinkwrap.resolver</groupId>
    <artifactId>shrinkwrap-resolver-api-maven</artifactId>
    <version>3.1.4</version>
</dependency>