public void getArtifact(
            Artifact artifact,
            List<ArtifactRepository> remoteRepositories,
            TransferListener downloadMonitor,
            boolean force)
            throws TransferFailedException, ResourceDoesNotExistException {
        TransferFailedException tfe = null;

        for (ArtifactRepository repository : remoteRepositories) {
            try {

        private Map<String, List<ArtifactVersion>> versions = new HashMap<>();

        @Override
        public ResolutionGroup retrieve(
                Artifact artifact, ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories)
                throws ArtifactMetadataRetrievalException {
            String key = getKey(artifact);

            ArtifactSpec a = artifacts.get(key);
            try {

import org.apache.maven.plugin.prefix.PluginPrefixRequest;
import org.apache.maven.plugin.prefix.PluginPrefixResolver;
import org.apache.maven.plugin.prefix.PluginPrefixResult;
import org.eclipse.aether.repository.ArtifactRepository;

/**
 */
public class PluginPrefixResolverStub implements PluginPrefixResolver {
    @Override
    public PluginPrefixResult resolve(PluginPrefixRequest request) throws NoPluginFoundForPrefixException {

    public List<ArtifactRepository> getRepositories() {
        if (repositories == null) {
            return Collections.emptyList();
        }

        return Collections.unmodifiableList(repositories);
    }

    public MetadataResolutionResult setRepositories(final List<ArtifactRepository> repositories) {
        this.repositories = repositories;

import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.Map;

import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.DefaultArtifactRepository;
import org.eclipse.aether.RepositoryException;
import org.eclipse.aether.metadata.AbstractMetadata;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin.prefix;

import org.eclipse.aether.repository.ArtifactRepository;

/**
 * Describes the result of a plugin prefix resolution request.
 *
 * @since 3.0
 */
public interface PluginPrefixResult {

    /**
     * The resolved group id for the plugin.
     *

    public List<ArtifactRepository> getRepositories() {
        if (repositories == null) {
            return Collections.emptyList();
        }

        return Collections.unmodifiableList(repositories);
    }

    public ArtifactResolutionResult setRepositories(final List<ArtifactRepository> repositories) {
        this.repositories = repositories;

import java.util.Properties;

import org.apache.maven.AbstractCoreMavenComponentTestCase;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.ArtifactUtils;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.bridge.MavenRepositorySystem;
import org.apache.maven.configuration.internal.EnhancedComponentConfigurator;
import org.apache.maven.execution.DefaultMavenExecutionRequest;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin;

import java.util.List;

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.AbstractArtifactResolutionException;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.model.Plugin;

/**

import javax.inject.Singleton;

import java.io.File;
import java.util.Map;

import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;
import org.apache.maven.artifact.repository.MavenArtifactRepository;
import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;