Package: org.apache.maven.project.DefaultProjectDependenciesResolver.java
Method: resolve(DependencyResolutionRequest request)
public interface DependencyResolutionRequest {
MavenProject getMavenProject();
DependencyResolutionRequest setMavenProject( MavenProject project );
DependencyFilter getResolutionFilter();
DependencyResolutionRequest setResolutionFilter( DependencyFilter filter );
RepositorySystemSession getRepositorySession();
DependencyResolutionRequest setRepositorySession( RepositorySystemSession repositorySession );
}
public class DefaultDependencyResolutionRequest
implements DependencyResolutionRequest
public DependencyResolutionResult resolve( DependencyResolutionRequest request )
throws DependencyResolutionException
{
RequestTrace trace = RequestTrace.newChild( null, request );
DefaultDependencyResolutionResult result = new DefaultDependencyResolutionResult();
MavenProject project = request.getMavenProject();
RepositorySystemSession session = request.getRepositorySession();
if ( logger.isDebugEnabled()
&& session.getConfigProperties().get( DependencyManagerUtils.CONFIG_PROP_VERBOSE ) == null )
{
DefaultRepositorySystemSession verbose = new DefaultRepositorySystemSession( session );
verbose.setConfigProperty( DependencyManagerUtils.CONFIG_PROP_VERBOSE, Boolean.TRUE );
session = verbose;
}
DependencyFilter filter = request.getResolutionFilter();
In this part there is some initialization done and actually no-magic.
ArtifactTypeRegistry stereotypes = session.getArtifactTypeRegistry();
CollectRequest collect = new CollectRequest();
collect.setRootArtifact( RepositoryUtils.toArtifact( project.getArtifact() ) );
collect.setRequestContext( "project" );
collect.setRepositories( project.getRemoteProjectRepositories() );
If the project has not direct dependencies, the dependencies are taken from the model
if ( project.getDependencyArtifacts() == null )
{
for ( Dependency dependency : project.getDependencies() )
{
if ( StringUtils.isEmpty( dependency.getGroupId() ) || StringUtils.isEmpty( dependency.getArtifactId() )
|| StringUtils.isEmpty( dependency.getVersion() ) )
{
// guard against case where best-effort resolution for invalid models is requested
continue;
}
collect.addDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
}
}
Otherwise all dependencies are gathered in the map maps dependecies with its versionless id, which will be used for discovering potencial conficts.
else
{
Map dependencies = new HashMap();
for ( Dependency dependency : project.getDependencies() )
{
String classifier = dependency.getClassifier();
if ( classifier == null )
{
ArtifactType type = stereotypes.get( dependency.getType() );
if ( type != null )
{
classifier = type.getClassifier();
}
}
String key =
ArtifactIdUtils.toVersionlessId( dependency.getGroupId(), dependency.getArtifactId(),
dependency.getType(), classifier );
dependencies.put( key, dependency );
}
for ( Artifact artifact : project.getDependencyArtifacts() )
{
String key = artifact.getDependencyConflictId();
Dependency dependency = dependencies.get( key );
Collection exclusions = dependency != null ? dependency.getExclusions() : null;
org.eclipse.aether.graph.Dependency dep = RepositoryUtils.toDependency( artifact, exclusions );
if ( !JavaScopes.SYSTEM.equals( dep.getScope() ) && dep.getArtifact().getFile() != null )
{
// enable re-resolution
org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
art = art.setFile( null ).setVersion( art.getBaseVersion() );
dep = dep.setArtifact( art );
}
collect.addDependency( dep );
}
}
Now is time for adding managed dependencies (WTF..)
DependencyManagement depMngt = project.getDependencyManagement();
if ( depMngt != null )
{
for ( Dependency dependency : depMngt.getDependencies() )
{
collect.addManagedDependency( RepositoryUtils.toDependency( dependency, stereotypes ) );
}
}
Extras
Btw. list of stereotypes:
default
ear
eclipse-application
eclipse-feature
eclipse-plugin
eclipse-repository
eclipse-target-definition
eclipse-test-plugin
eclipse-update-site
ejb
ejb3
ejb-client
jar
javadoc
java-source
maven-plugin
par
pom
rar
test-jar
war
Resolving list of artifacts
Location: org.eclipse.aether.internal.impl.DefaultArtifactResolver.java:242
public List resolveArtifacts( RepositorySystemSession session,
Collection requests )
{
SyncContext syncContext = syncContextFactory.newInstance( session, false );
try
{
Collection artifacts = new ArrayList( requests.size() );
for ( ArtifactRequest request : requests )
{
if ( request.getArtifact().getProperty( ArtifactProperties.LOCAL_PATH, null ) != null )
{
continue;
}
artifacts.add( request.getArtifact() );
}
syncContext.acquire( artifacts, null );
return resolve( session, requests );
}
finally
{
syncContext.close();
}
}
ReactorReader
Find file appropriate for given Artifact in local reactor
public File findArtifact( Artifact artifact )
