private final Map<Artifact, Path> paths = new ConcurrentHashMap<>();

                @Override
                public Optional<Path> getPath(Artifact artifact) {
                    return Optional.ofNullable(paths.get(artifact));
                }

                @Override
                public void setPath(ProducedArtifact artifact, Path path) {
                    paths.put(artifact, path);

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

import java.util.Map;

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
import org.apache.maven.execution.MavenSession;

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

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.apache.maven.artifact.Artifact;

/**
 * Apply multiple filters.
 *
 */
public class AndArtifactFilter implements ArtifactFilter {

 * @since 4.0.0
 * @see org.apache.maven.api.services.DependencyResolverResult#getRoot()
 */
@Experimental
@Immutable
@Provider
public interface Node {

    /**
     * @return artifact for this node
     */
    @Nullable
    Artifact getArtifact();

    /**
     * @return dependency for this node
     */
    @Nullable
    Dependency getDependency();

    /**
     * Gets the child nodes of this node.

import org.apache.maven.api.Language;
import org.apache.maven.api.PathType;
import org.apache.maven.api.Type;
import org.apache.maven.repository.internal.artifact.MavenArtifactProperties;
import org.eclipse.aether.artifact.ArtifactProperties;
import org.eclipse.aether.artifact.ArtifactType;

import static java.util.Objects.requireNonNull;

/**
 * Default implementation of {@link Type} and Resolver {@link ArtifactType}.
 *

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

import javax.inject.Inject;

import org.apache.maven.artifact.ArtifactScopeEnum;
import org.codehaus.plexus.testing.PlexusTest;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

        validateApi(body, messages -> {});
        final Artifact artifact = ComponentUtil.getPluginHelper().getArtifact(body.name, body.version);
        if (artifact == null) {
            return asJson(
                    new ApiResult.ApiErrorResponse().message("invalid name or version").status(ApiResult.Status.BAD_REQUEST).result());
        }
        installArtifact(artifact);

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

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

import java.util.Arrays;
import java.util.List;

import org.apache.maven.artifact.UnknownRepositoryLayoutException;
import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
import org.apache.maven.plugin.LegacySupport;

     */
    public String getGroupId() {
        return (groupId != null) ? groupId : "";
    }

    /**
     * Gets the effective artifact identifier of the model.
     *
     * @return The effective artifact identifier of the model or an empty string if unknown, never {@code null}.
     */
    public String getArtifactId() {
        return (artifactId != null) ? artifactId : "";
    }

        <field>
          <name>groupId</name>
          <description>The group ID of the extension's artifact.</description>
          <version>1.0.0+</version>
          <required>true</required>
          <type>String</type>
        </field>
        <field>
          <name>artifactId</name>
          <description>The artifact ID of the extension.</description>
          <version>1.0.0+</version>
          <required>true</required>