* under the License.
 */
package org.apache.maven.artifact.deployer;

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.Collections;
import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.DefaultArtifactVersion;

- malformed POM
- local repository not writable
- remote repositories not available
- artifact metadata missing
- extension metadata missing
- extension artifact missing
- artifact metadata retrieval problem
- version range violation
- circular dependency
- artifact missing
- artifact retrieval exception
- md5 checksum doesn't match for local artifact, need to redownload this
- POM doesn't exist for a goal that requires one

 * <li>Check Local Repository: Maven first checks if the artifact is available in the local repository.</li>
 * <li>Check Remote Repositories: If the artifact is not found locally, Maven queries the configured remote repositories in the order they are listed.</li>
 * <li>Download and Cache: If Maven finds the artifact in a remote repository, it downloads it and stores it in the local repository for future use.</li>
 * </ol>

                    <parent>
                        <groupId>com.example</groupId>
                        <artifactId>parent-project</artifactId>
                        <version>1.0.0</version>
                    </parent>
                    <artifactId>child-project</artifactId>
                    <!-- groupId and version inherited from parent -->
                </project>
                """;

import java.io.File;

import org.eclipse.aether.artifact.Artifact;

/**
 */
class ArtifactClassRealmConstituent implements ClassRealmConstituent {

    private final Artifact artifact;

    ArtifactClassRealmConstituent(Artifact artifact) {
        this.artifact = artifact;
    }

    @Override
    public String getGroupId() {
        return artifact.getGroupId();
    }

    @Override

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

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadataStoreException;

/**
 * Contains metadata about an artifact, and methods to retrieve/store it from an artifact repository.
 * TODO merge with artifactmetadatasource
 * TODO retrieval exception not appropriate for store
 *
 */

     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(String message, Throwable cause) {
        super(message, cause, null);
    }

    public ArtifactMetadataRetrievalException(String message, Throwable cause, Artifact artifact) {
        super(message, cause, artifact);
    }

    }

    @Override
    public File findArtifact(Artifact artifact) {
        return null;
    }

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

    @Override
    public Model findModel(Artifact artifact) {
        if (GROUP_ID.equals(artifact.getGroupId())
                && ARTIFACT_ID.equals(artifact.getArtifactId())

    }

    private void missingDescriptor(
            RepositorySystemSession session, RequestTrace trace, Artifact artifact, Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.ARTIFACT_DESCRIPTOR_MISSING);
        event.setTrace(trace);
        event.setArtifact(artifact);
        event.setException(exception);

        repositoryEventDispatcher.dispatch(event.build());
    }

        this.excludes = excludes;
    }

    @Override
    public boolean include(Artifact artifact) {
        String id = artifact.getArtifactId();

        if (excludes.contains(id)) {
            return false;
        }

        id = artifact.getGroupId() + ':' + id;

        return !excludes.contains(id);
    }

    @Override
    public int hashCode() {