* thrown or a simple string message. In addition, a problem carries a hint about its source, e.g. the settings file
 * that exhibits the problem.
 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.api.services} instead
 */
@Deprecated(since = "4.0.0")
public interface Problem {

    /**
     * The different severity levels for a problem, in decreasing order.
     */
    enum Severity {
        FATAL, //

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

/**
 * Signals an error when resolving the path to an external model.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class UnresolvableModelException extends Exception {

    /**
     * The group id of the unresolvable model.
     */
    private final String groupId;

 * (if it did we could add @Priority of 0 to match the priority given to default components.)
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Named("core-default")
@Singleton
@Typed(ModelProcessor.class)
@Deprecated(since = "4.0.0")
public class DefaultModelProcessor implements ModelProcessor {

    @Inject

/**
 * A model building request that delegates all methods invocations to another request, meant for easy transformations by
 * subclassing.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
class FilterModelBuildingRequest implements ModelBuildingRequest {

    protected ModelBuildingRequest request;

import org.apache.maven.utils.Os;

/**
 * Determines profile activation based on the operating system of the current runtime platform.
 *
 * @see ActivationOS
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Named("os")
@Singleton
@Deprecated(since = "4.0.0")
public class OperatingSystemProfileActivator implements ProfileActivator {

    private static final String REGEX_PREFIX = "regex:";

 */
package org.apache.maven.project;

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

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

/**
 * @deprecated use {@code org.apache.maven.api.services.ProjectBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class ProjectBuildingException extends Exception {
    private final String projectId;

    private File pomFile;

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

import java.nio.file.Path;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Stream;

import org.apache.maven.api.Language;

import java.io.IOException;

/**
 * Signals a failure to parse the POM due to invalid syntax (e.g. non well-formed XML or unknown elements).
 *
 * @deprecated use {@code org.apache.maven.api.services.xml.ModelXmlFactory} instead
 */
@Deprecated(since = "4.0.0")
public class ModelParseException extends IOException {

    /**
     * The one-based index of the line containing the error.
     */

import java.io.IOException;

/**
 * Signals a failure to parse the settings due to invalid syntax (e.g. non well-formed XML or unknown elements).
 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.api.services.xml.SettingsXmlFactory} instead
 */
@Deprecated(since = "4.0.0")
public class SettingsParseException extends IOException {

    /**
     * The one-based index of the line containing the error.
     */

import java.util.Map;

import org.apache.maven.settings.Settings;

/**
 * Handles serialization of settings into some kind of textual format like XML.
 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.api.services.xml.SettingsXmlFactory} instead
 */
@Deprecated(since = "4.0.0")
public interface SettingsWriter {

    /**