import org.apache.maven.model.ReportSet;
import org.apache.maven.model.Reporting;
import org.apache.maven.model.building.ModelBuildingRequest;
import org.apache.maven.model.building.ModelProblem.Severity;
import org.apache.maven.model.building.ModelProblem.Version;
import org.apache.maven.model.building.ModelProblemCollector;
import org.apache.maven.model.building.ModelProblemCollectorRequest;

import org.apache.maven.model.InputLocation;
import org.apache.maven.model.Model;
import org.apache.maven.model.building.ModelBuildingRequest;
import org.apache.maven.model.building.ModelProblem.Severity;
import org.apache.maven.model.building.ModelProblem.Version;
import org.apache.maven.model.building.ModelProblemCollector;
import org.apache.maven.model.building.ModelProblemCollectorRequest;

 * be used.
 * <p>
 * This interface provides methods for logging messages at different severity levels
 * and supports logging with or without associated exceptions.
 *
 * @since 4.0.0
 */
@Experimental
public interface Logger {

    /**
     * Represents the severity levels for log messages.
     */
    enum Level {
        DEBUG,
        INFO,
        WARN,
        ERROR
    }

                            return problem.getMessage();
                        }

                        @Override
                        public Severity getSeverity() {
                            return Severity.valueOf(problem.getSeverity().name());
                        }
                    };
                }

                @Nonnull
                @Override

import org.apache.maven.api.services.ArtifactResolverException;
import org.apache.maven.api.services.ArtifactResolverRequest;
import org.apache.maven.api.services.ArtifactResolverResult;
import org.apache.maven.api.services.BuilderProblem.Severity;
import org.apache.maven.api.services.ModelBuilder;
import org.apache.maven.api.services.ModelBuilderException;
import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.ModelBuilderResult;

        SimpleModelProblemCollector(ModelValidationResult result) {
            this.result = result;
        }

        @Override
        public void add(ModelProblemCollectorRequest req) {
            if (!ModelProblem.Severity.WARNING.equals(req.getSeverity())) {
                result.addMessage(req.getMessage());
            }
        }
    }

   * public static void main(String[] args) {
   *   Thread.currentThread().setUncaughtExceptionHandler(UncaughtExceptionHandlers.systemExit());
   *   ...
   * </pre>
   *
   * <p>The returned handler logs any exception at severity {@code SEVERE} and then shuts down the
   * process with an exit status of 1, indicating abnormal termination.
   */
  public static UncaughtExceptionHandler systemExit() {
    return new Exiter(Runtime.getRuntime()::exit);

                    warnings.add(req.getMessage());
                }
                break;
            default:
                throw new IllegalArgumentException("Unknown severity: " + req.getSeverity());
        }
    }

    }

    private static class SimpleProblemCollector implements SettingsProblemCollector {

        List<String> messages = new ArrayList<>();

        @Override
        public void add(Severity severity, String message, int line, int column, Exception cause) {
            messages.add(message);
        }
    }

   * public static void main(String[] args) {
   *   Thread.currentThread().setUncaughtExceptionHandler(UncaughtExceptionHandlers.systemExit());
   *   ...
   * </pre>
   *
   * <p>The returned handler logs any exception at severity {@code SEVERE} and then shuts down the
   * process with an exit status of 1, indicating abnormal termination.
   */
  public static UncaughtExceptionHandler systemExit() {
    return new Exiter(Runtime.getRuntime()::exit);