* or a simple string message. In addition, a problem carries a hint about its source, e.g. the POM file that exhibits
 * the problem.
 *
 */
public interface ModelProblem extends BuilderProblem {

    /**
     * Enumeration of model versions that can be validated.
     * These versions correspond to different levels of validation that can be applied

        }

        private static org.apache.maven.model.building.ModelProblem convert(ModelProblem p) {
            return new DefaultModelProblem(
                    p.getMessage(),
                    org.apache.maven.model.building.ModelProblem.Severity.valueOf(
                            p.getSeverity().name()),
                    org.apache.maven.model.building.ModelProblem.Version.valueOf(
                            p.getVersion().name()),

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

import org.apache.maven.model.building.ModelProblem;

import static java.util.stream.Collectors.joining;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**

import javax.inject.Singleton;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.model.building.ModelProblem;
import org.apache.maven.model.building.ModelProblemUtils;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuilder;
import org.apache.maven.project.ProjectBuildingException;

import org.apache.maven.impl.InternalSession;
import org.apache.maven.impl.MappedCollection;
import org.apache.maven.impl.RequestTraceHelper;
import org.apache.maven.model.building.ModelProblem;
import org.apache.maven.model.building.ModelSource2;
import org.apache.maven.project.DefaultProjectBuildingRequest;
import org.apache.maven.project.ProjectBuildingException;

        rel.pomArtifact = pomArtifact;
        rel.relocatedArtifact = relocatedArtifact;

        return rel;
    }

    private ModelProblem hasMissingParentPom(ProjectBuildingException e) {
        if (e.getCause() instanceof ModelBuildingException mbe) {
            for (ModelProblem problem : mbe.getProblems()) {
                if (problem.getException() instanceof UnresolvableModelException) {
                    return problem;

import org.apache.maven.api.model.Profile;
import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.ModelBuilderResult;
import org.apache.maven.api.services.ModelProblem;
import org.apache.maven.api.services.ModelSource;
import org.apache.maven.api.services.ProblemCollector;
import org.apache.maven.api.services.Source;
import org.junit.jupiter.api.Test;

        assertEquals(
                pomFile.getAbsoluteFile(),
                result.getProject().getModel().getPomFile().getAbsoluteFile());
        int errors = 0;
        for (ModelProblem p : result.getProblems()) {
            if (p.getSeverity() == ModelProblem.Severity.ERROR) {
                errors++;
            }
        }
        assertEquals(0, errors);
    }

    @Test

        }
    }

    /**
     * Gets the problems that caused this exception.
     *
     * @return The problems that caused this exception, never {@code null}.
     */
    public ProblemCollector<ModelProblem> getProblemCollector() {
        if (result == null) {
            return ProblemCollector.empty();
        }
        return result.getProblemCollector();
    }

     *
     * @return the problem collector that collected problems encountered during the project building
     */
    @Nonnull
    ProblemCollector<ModelProblem> getProblemCollector();

    /**
     * Gets the children of this result.
     *
     * @return the children of this result, can be empty but never {@code null}
     */
    @Nonnull