import org.apache.maven.api.services.Source;
import org.eclipse.aether.RepositoryCache;
import org.eclipse.aether.RepositorySystemSession;

import static java.util.Objects.requireNonNull;

/**
 * A model builder cache backed by the repository system cache.
 *
 */
public class DefaultModelCache implements ModelCache {
    private static final String KEY = DefaultModelCache.class.getName();

    @SuppressWarnings("unchecked")

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.lifecycle.internal.builder.multithreaded;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;

        <field xml.format="((PluginDescriptor.Builder) context.peekLast()).build().getId() + &quot;:&quot; + mojoDescriptor.build().getGoal()">
          <name>id</name>
          <version>2.0.0+</version>
          <type>String</type>
          <description>the id of the mojo, based on the goal name</description>
        </field>

        Model model = Model.newInstance();
        Model.Builder builder = Model.newBuilder(model);
        modelMerger.mergeModel_ModelVersion(builder, model, parent, false, null);
        assertNull(builder.build().getModelVersion());

        model = Model.newBuilder().modelVersion("5.0.0").build();
        builder = Model.newBuilder(model);
        modelMerger.mergeModel_ModelVersion(builder, model, parent, false, null);

        }

        public void mergeBuildBase(BuildBase.Builder builder, BuildBase target, BuildBase source) {
            mergeBuildBase(builder, target, source, true, Collections.emptyMap());
        }

        @Override
        protected void mergePluginContainer_Plugins(
                PluginContainer.Builder builder,
                PluginContainer target,

class TestApiStandalone {

    @Test
    void testStandalone() {
        Session session = ApiRunner.createSession();

        ModelBuilder builder = session.getService(ModelBuilder.class);
        ModelBuilderResult result = builder.build(ModelBuilderRequest.builder()
                .session(session)
                .source(ModelSource.fromPath(Paths.get("pom.xml").toAbsolutePath()))
                .projectBuild(true)

    String getType();

    static ArtifactFactoryRequest build(
            Session session, String groupId, String artifactId, String version, String extension) {
        return ArtifactFactoryRequest.builder()
                .session(nonNull(session, "session cannot be null"))
                .groupId(groupId)
                .artifactId(artifactId)
                .version(version)
                .extension(extension)

        Profile.Builder profile = Profile.newBuilder();

        profile.id(modelProfile.getId());

        org.apache.maven.api.model.Activation modelActivation = modelProfile.getActivation();

        if (modelActivation != null) {
            Activation.Builder activation = Activation.newBuilder();

    }

    @Override
    public int getTerminalWidth() {
        return -1;
    }

    @Override
    @Nonnull
    public MessageBuilder builder() {
        return new DefaultMessageBuilder();
    }

    @Override
    @Nonnull
    public MessageBuilder builder(int size) {
        return new DefaultMessageBuilder(new StringBuilder(size));
    }

 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the
 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
 * model builder.
 *
 */
public interface ModelCache {