}

    protected void assertUniqueKey(Key key) {
        if (cache.containsKey(key)) {
            throw new IllegalStateException("Duplicate artifact resolution result for project " + key);
        }
    }

    @Override
    public void flush() {
        cache.clear();
    }

    @Override

     * resolution, this does not include the download of the files for the dependency artifacts. It is meant for mojos
     * that only want to analyze the set of transitive dependencies, in particular during early lifecycle phases where
     * full dependency resolution might fail due to projects which haven't been built yet.
     *

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;

/**
 * Base class for artifact resolution exceptions.
 *
 */
public class AbstractArtifactResolutionException extends Exception {
    private String groupId;

    private String artifactId;

    private String version;

    private String type;

        trackingFileManager.update(touchfile, update);
    }

    Date readLastUpdated(File touchfile, String key) {
        getLogger().debug("Searching for " + key + " in resolution tracking file.");

        Properties props = read(touchfile);
        if (props != null) {
            String rawVal = props.getProperty(key);
            if (rawVal != null) {
                try {

import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingException;
import org.apache.maven.project.ProjectBuildingResult;
import org.eclipse.aether.resolution.ArtifactResolutionException;
import org.eclipse.aether.transfer.ArtifactNotFoundException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**

          throw new UnsupportedOperationException(
              "Annotation methods are not supported on synthetic TypeVariables created during type"
                  + " resolution. The semantics of annotations on resolved types with modified"
                  + " bounds are undefined. Use the original TypeVariable for annotation access."
                  + " See b/147144588.");
        }

             * the activated profiles can cause repo declarations to be lost which in turn will result in artifact
             * resolution failures, in particular when using the enhanced local repo which guards access to local files
             * based on the configured remote repos.
             */
            MavenSession session = legacySupport.getSession();

        assertThrows(
                ArtifactNotFoundException.class,
                () -> artifactResolver.resolve(k, remoteRepositories(), localRepository()),
                "Resolution succeeded when it should have failed");
    }

    @Test
    void testResolutionOfAnArtifactWhereOneRemoteRepositoryIsBadButOneIsGood() throws Exception {
        Artifact l = createRemoteArtifact("l", "1.0-SNAPSHOT");

                        Severity.WARNING,
                        prefix + ".layout",
                        repository.getId(),
                        "uses the unsupported value 'legacy', artifact resolution might fail.");
            }
        }
    }

    // ----------------------------------------------------------------------
    // Field validation

        Artifact artifact = getArtifact("d", res.getArtifacts());
        assertNotNull(artifact, "MNG-1895 Dependency was not added to resolution");
        assertEquals(expectedScope, artifact.getScope(), "Check artifactScope");
        assertEquals(expectedVersion, artifact.getVersion(), "Check version");

        ArtifactSpec d = createArtifactSpec("d", "1.0");