throw new ArtifactMetadataRetrievalException(e.getMessage(), e, request.getArtifact());
        }

        List<String> availableVersions = request.getLocalRepository().findVersions(request.getArtifact());

        return retrieveAvailableVersionsFromMetadata(metadata.getMetadata(), availableVersions);
    }

    @Override

        WorkspaceReader workspace = session.getWorkspaceReader();
        if (workspace != null) {
            List<String> versions = workspace.findVersions(request.getArtifact());
            for (String version : versions) {
                versionIndex.put(version, workspace.getRepository());
            }
        }

        // with multiple local repository implementations yet.
        artifact.setFile(artifactFile);

        return artifact;
    }

    @Override
    public List<String> findVersions(Artifact artifact) {
        return Collections.emptyList();
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public String getUrl() {

                    Metadata.Nature.RELEASE_OR_SNAPSHOT);
        } else if (version.endsWith(SNAPSHOT)) {
            WorkspaceReader workspace = session.getWorkspaceReader();
            if (workspace != null && workspace.findVersions(artifact).contains(version)) {
                metadata = null;
                result.setRepository(workspace.getRepository());
            } else {
                metadata = new DefaultMetadata(

        @Override
        public org.apache.maven.artifact.Artifact find(org.apache.maven.artifact.Artifact artifact) {
            return null;
        }

        @Override
        public List<String> findVersions(org.apache.maven.artifact.Artifact artifact) {
            return Collections.emptyList();
        }

        @Override
        public boolean isProjectAware() {
            return false;
        }

                }
            }
            return packagedArtifactFile;
        }

        return null;
    }

    @Override
    public List<String> findVersions(Artifact artifact) {
        List<String> versions = getProjects()
                .getOrDefault(artifact.getGroupId(), Collections.emptyMap())
                .getOrDefault(artifact.getArtifactId(), Collections.emptyMap())