public class CycleDetectedInPluginGraphException extends Exception {
    private final Plugin plugin;

    public CycleDetectedInPluginGraphException(Plugin plugin, CycleDetectedInComponentGraphException e) {
        super("A cycle was detected in the component graph of the plugin: " + plugin.getArtifactId());

        this.plugin = plugin;
    }

    public Plugin getPlugin() {
        return plugin;
    }

 */
public class DuplicateArtifactAttachmentException extends RuntimeException {

    private static final String DEFAULT_MESSAGE = "Duplicate artifact attachment detected.";

    private Artifact artifact;

    private final MavenProject project;

    public DuplicateArtifactAttachmentException(MavenProject project, Artifact artifact) {

                return projects;
            } else {
                LOGGER.debug(
                        "Multi module project collection failed:{}"
                                + "Detected a POM file next to a .mvn directory in a parent directory ({}). "
                                + "Maven assumed that POM file to be the parent of the requested project ({}), but it turned "

            dag.addEdge(from.toString(), p.toString());
            return true;
        } catch (Graph.CycleDetectedException e) {
            problems.add(new DefaultModelProblem(
                    "Cycle detected between models at " + from + " and " + p,
                    ModelProblem.Severity.FATAL,
                    null,
                    null,
                    0,
                    0,
                    null,

            // I'm not sure if this last regexp was really intended to disallow the usage of
            // network paths as user.home directory. Unfortunately it did. I removed it and
            // have not detected any problems yet.
            // ---------------------------------------------------------------------------------
            // path = path.replaceAll( "//", "/" );

        }

     * @param type
     * @param requirements
     * @return the selected {@link Toolchain}s
     * @throws ToolchainManagerException if an exception occurs
     */
    @Nonnull
    List<Toolchain> getToolchains(@Nonnull Session session, String type, Map<String, String> requirements);

    /**
     *
     * @param session
     * @param type
     * @return the selected {@link Toolchain}

        MetadataGraphEdge res;

        res = policy.apply(e1, e2);
        assertEquals("1.1", res.getVersion(), "Wrong depth edge selected");

        res = policy.apply(e1, e3);
        assertEquals("1.2", res.getVersion(), "Wrong version edge selected");
    }
    // ------------------------------------------------------------------------------------------

need it so that empty directory does not get deleted...

 *
 */
@Deprecated
public interface GraphConflictResolver {
    String ROLE = GraphConflictResolver.class.getName();

    /**
     * Cleanses the supplied graph by leaving only one directed versioned edge\
     * between any two nodes, if multiple exists. Uses scope relationships, defined
     * in <code>ArtifactScopeEnum</code>
     *
     * @param graph the "dirty" graph to be simplified via conflict resolution

 * under the License.
 */
package org.apache.maven.repository;

import java.util.ArrayList;
import java.util.List;

/**
 * MetadataGraph node - as it's a directed graph - holds adjacency lists for incident and exident nodes
 *
 *
 */
@Deprecated
public class MetadataGraphNode {
    /** node payload */
    MavenArtifactMetadata metadata;