totalProblems, (totalProblems == 1) ? "problem was" : "problems were"));

            if (context.options().showErrors().orElse(false)) {
                for (BuilderProblem problem :
                        toolchainsResult.getProblems().problems().toList()) {
                    context.logger.warn(problem.getMessage() + " @ " + problem.getLocation());
                }
            }

            if (cause instanceof ModelBuildingException modelBuildingException) {
                String message = "In: " + pom + "\n\n";
                for (ModelProblem problem : modelBuildingException.getProblems()) {
                    message += problem + "\n";
                }
                System.out.println(message);
            }

            throw e;
        }
    }

 * under the License.
 */
package org.apache.maven.model.building;

import java.util.ArrayList;
import java.util.List;

import org.apache.maven.model.Model;

/**
 * A simple model problem collector for testing the model building components.
 *
 */
@Deprecated
public class SimpleProblemCollector implements ModelProblemCollector {
    private Model model;

      e is FileNotFoundException
  }

  private fun isRecoverable(
    e: IOException,
    requestSendStarted: Boolean,
  ): Boolean {
    // If there was a protocol problem, don't recover.
    if (e is ProtocolException) {
      return false
    }

    // If there was an interruption don't recover, but if there was a timeout connecting to a route

     * @return The calculated checksums, indexed by algorithms, never {@code null}.
     * @throws NullPointerException if passed in any parameter is {@code null}.
     * @throws IOException In case of any IO problem.
     */
    @Nonnull
    Map<ChecksumAlgorithm, String> calculate(@Nonnull Path file, @Nonnull Collection<ChecksumAlgorithm> algorithms)
            throws IOException;

    /**

   * nullness analysis might not understand that the field has been populated. To avoid that problem
   * without having to add {@code @SuppressWarnings}, the code can call this method.
   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either

   * nullness analysis might not understand that the field has been populated. To avoid that problem
   * without having to add {@code @SuppressWarnings}, the code can call this method.
   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either

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

/**
 * Problem storing the repository metadata in the local repository.
 *
 */
public class RepositoryMetadataStoreException extends Exception {
    public RepositoryMetadataStoreException(String message) {
        super(message);
    }

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

/**
 * Problem storing the repository metadata in the local repository.
 *
 */
@Deprecated
public class RepositoryMetadataReadException extends Exception {
    public RepositoryMetadataReadException(String message) {

## Decision

Introduce a "UI" architecture module to the core platform, and move the user interaction services to this new module.

This includes:

- Logging and progress services.
- Problem generation services (aka the "problems API").
- User prompting services.
- Build options infrastructure.
- The console and CLI, as a specific implementation of these services.