/**
 * <p>
 * Provides the positional index of the project
 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
// TODO Kristian wonders if this class really is necessary and if it overlaps other concepts.
public final class ProjectIndex {

    private final Map<String, MavenProject> projects;

    private final Map<String, Integer> indices;

        // TODO this needs to be repeated here so the merging doesn't interfere with the written metadata
        //  - we'd be much better having a pristine input, and an ongoing metadata for merging instead

        Map<ArtifactRepository, Metadata> previousMetadata = new HashMap<>();
        ArtifactRepository selected = null;

        // this map is read ONLY to get config from (profiles + env + system + user)
        Map<String, String> mergedProps = createMergedProperties(request);

        // configProps map is kept "pristine", is written ONLY, the mandatory resolver config
        Map<String, Object> configProps = new LinkedHashMap<>();
        configProps.put(ConfigurationProperties.USER_AGENT, getUserAgent());

Erik Erwitt, Fabrizio Milo, G. Hussain Chinoy, Jim Fleming, Joao Felipe Santos,
Jonas Meinertz Hansen, Joshi Rekha, Julian Viereck, Keiji Ariyama, Kenton Lee,
Krishna Sankar, Kristina Chodorow, Linchao Zhu, Lukas Krecan, Mark Borgerding,
Mark Daoust, Moussa Taifi, Nathan Howell, Naveen Sundar Govindarajulu, Nick
Sweeting, Niklas Riekenbrauck, Olivier Grisel, Patrick Christ, Povilas