}

    /**
     * Set username used to access the repository.
     *
     * @param userName the username used to access repository
     */
    public void setUsername(final String userName) {
        this.username = userName;
    }

    /**
     * Get the passphrase of the private key file. The passphrase is used only when host/protocol supports

                for (Throwable cause = e.getCause();
                        cause != null && cause != cause.getCause();
                        cause = cause.getCause()) {
                    logger.error("Caused by: {}", cause.getMessage());
                }
            }
        }
    }

    public static String formatTimestamp(long timestamp) {

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

import org.apache.maven.api.model.DependencyManagement;
import org.apache.maven.api.model.Model;

/**
 * Describes a tag used by the model builder to access a {@link ModelCache}. This interface basically aggregates a name
 * and a class to provide some type safety when working with the otherwise untyped cache.
 *

/**
 * Dependency scope.
 * This represents at which time the dependency will be used, for example, at compile time only,
 * at run time or at test time.  For a given dependency, the scope is directly derived from the
 * {@link org.apache.maven.api.model.Dependency#getScope()} and will be used when using {@link PathScope}
 * and the {@link org.apache.maven.api.services.DependencyResolver}.
 *
 * @since 4.0.0

 * {@link org.apache.maven.model.building.ModelBuilder} will add any relevant repositories to the model resolver. In
 * other words, the model resolver is stateful and should not be reused across multiple model building requests.
 *
 */
public interface ModelResolver {

    /**
     * Tries to resolve the POM for the specified coordinates.
     *

     * @param columnNumber The one-based index of the column containing the error or {@code -1} if unknown.
     * @param exception The exception that caused this problem, may be {@code null}.
     */
    // mkleint: does this need to be public?
    public DefaultModelProblem(
            String message,
            Severity severity,
            Version version,

    /**
     * This method is used to initialize the TransformerContext
     *
     * @param request the modelBuildingRequest
     * @param problems the problemCollector
     * @return the mutable transformerContext
     */
    TransformerContext initialize(ModelBuildingRequest request, ModelProblemCollector problems);

    /**
     * The immutable transformerContext, can be used after the buildplan is finished.
     *

    /**
     * This method is used to initialize the TransformerContext
     *
     * @param request the modelBuildingRequest
     * @param problems the problemCollector
     * @return the mutable transformerContext
     */
    ModelTransformerContext initialize(ModelBuilderRequest request, ModelProblemCollector problems);

    /**
     * The immutable transformerContext, can be used after the buildplan is finished.
     *

     *
     * @param model The model to validate, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    default void validateFileModel(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        // do nothing
    }

     * @return The model building request being processed, never {@code null}.
     */
    ModelBuildingRequest getRequest();

    /**
     * Gets the container used to collect problems that were encountered while processing the event.
     *
     * @return The container used to collect problems that were encountered, never {@code null}.
     */
    ModelProblemCollector getProblems();