try (InputStream inputStream = Files.newInputStream(file)) {
            org.apache.maven.model.Model model =
                    new org.apache.maven.model.Model(new MavenStaxReader().read(inputStream));
            project = new MavenProject(model);
            project.setRootDirectory(Paths.get("src/test/resources/consumer/trivial"));
            project.setOriginalModel(model);

import org.apache.maven.api.model.Model;
import org.apache.maven.api.services.Source;

/**
 * The {@code ModelParser} interface is used to locate and read {@link Model}s from the file system.
 * This allows plugging in additional syntaxes for the main model read by Maven when building a project.
 *
 * @since 4.0.0
 */
@Experimental
@Consumer
public interface ModelParser extends SpiService {

    /**

    <p>A Toolchain is a preconfigured object that Maven plugins can use for tool configuration retrieval (location and other information).
    <p>The <a href="/plugins/maven-toolchains-plugin/">toolchains-plugin</a> can read available toolchains on the user's computer
    and match them against the toolchain requirements of the project (as configured in {@code pom.xml}):

            throw new IllegalArgumentException("The POM found does not belong to the given directory: " + pom);
        }
        return pom;
    }

    @Override
    public Model read(XmlReaderRequest request) throws IOException {
        Objects.requireNonNull(request, "source cannot be null");
        Path pomFile = request.getPath();
        if (pomFile != null) {

        Build build = getModel().getBuild();
        return build != null ? build : Build.newInstance();
    }

    /**
     * Returns the path to the pom file for this project.
     * A project is usually read from a file named {@code pom.xml},
     * which contains the {@linkplain #getModel() model} in an XML form.
     * When a custom {@code org.apache.maven.api.spi.ModelParser} is used,
     * the path may point to a non XML file.

@Named
@Singleton
public class DefaultMetadataReader implements MetadataReader {

    public Metadata read(File input, Map<String, ?> options) throws IOException {
        Objects.requireNonNull(input, "input cannot be null");

        return read(Files.newInputStream(input.toPath()), options);
    }

    public Metadata read(Reader input, Map<String, ?> options) throws IOException {

            attachedArtifacts.set(index, artifact);
        } else {
            attachedArtifacts.add(artifact);
        }
    }

    /**
     * Returns a read-only list of the attached artifacts to this project.
     *
     * @return the attached artifacts of this project
     */
    public List<Artifact> getAttachedArtifacts() {
        if (attachedArtifacts == null) {

        org.apache.maven.project.ProjectBuilder projectBuilder =
                getContainer().lookup(org.apache.maven.project.ProjectBuilder.class);

        // read poms separately
        boolean parentFileWasFoundOnChild = false;
        for (File file : toRead) {
            List<ProjectBuildingResult> results =

            SettingsStaxReader reader = new SettingsStaxReader();
            InputSource source = new InputSource(settingsFile.toString());
            return new Settings(reader.read(is, true, source));
        }
    }

        Metadata recessive = read(existing);

        merge(recessive);

        write(result, metadata);

        merged = true;
    }

    @Override
    public boolean isMerged() {
        return merged;
    }

    protected abstract void merge(Metadata recessive);

    static Metadata read(Path metadataPath) throws RepositoryException {