*/
    public void explicitlyActivate(String profileId) {
        if (!activatedIds.contains(profileId)) {
            logger.debug("Profile with id: '" + profileId + "' has been explicitly activated.");

            activatedIds.add(profileId);
        }
    }

    /* (non-Javadoc)
     * @see org.apache.maven.profiles.ProfileManager#explicitlyActivate(java.util.List)
     */

import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import static java.util.stream.Collectors.toSet;

/**
 * Container for storing the request from the user to activate or deactivate certain projects and optionally fail the
 * build if those projects do not exist.
 */
public class ProjectActivation {
    private static class ProjectActivationSettings {
        /**

            boolean reverseName = false;

            if (name == null) {
                throw new ProfileActivationException(
                        "The property name is required to activate the profile '" + profile.getId() + "'");
            }

            if (name.startsWith("!")) {
                reverseName = true;
                name = name.substring(1);
            }

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.execution;

/**
 * Describes whether a target should be activated or not, and if that is required or optional.
 */
enum ActivationSettings {
    ACTIVATION_OPTIONAL(true, true),
    ACTIVATION_REQUIRED(true, false),
    DEACTIVATION_OPTIONAL(false, true),

    <class>
      <name>ActivationProperty</name>
      <version>1.0.0</version>
      <description><![CDATA[
        This is the property specification used to activate a profile. If the value field is empty,
        then the existence of the named property will activate the profile, otherwise it does a case-sensitive
        match against the property value as well.
      ]]></description>
      <fields>
        <field>

    <class java.clone="deep">
      <name>ActivationProperty</name>
      <version>1.0.0+</version>
      <description>
        This is the property specification used to activate a profile. If the value field is empty,
        then the existence of the named property will activate the profile, otherwise it does a case-sensitive
        match against the property value as well.
      </description>
      <fields>
        <field>

     */
    @Deprecated
    MavenExecutionRequest setActiveProfiles(List<String> profiles);

    /**
     * @return The list of profiles that the user wants to activate.
     * @deprecated Since Maven 4: use {@link #getProfileActivation()}.
     */
    @Deprecated
    List<String> getActiveProfiles();

    /**

 */
package org.apache.maven.api.services.model;

import org.apache.maven.api.model.Profile;
import org.apache.maven.api.services.ModelProblemCollector;

/**
 * Determines whether a profile should be activated.
 *
 */
public interface ProfileActivator {

    /**
     * Determines whether the specified profile is active in the given activator context.
     *

    private boolean isValidProfileId(String id) {
        switch (id.charAt(0)) { // avoid first character that has special CLI meaning in "mvn -P xxx"
            case '+': // activate
            case '-': // deactivate
            case '!': // deactivate
            case '?': // optional
                return false;
            default:
        }
        return true;
    }

    public List<String> getActiveProfileIds() {
        return activeProfileIds;
    }

    /**
     * Sets the identifiers of those profiles that should be activated by explicit demand.
     *
     * @param activeProfileIds The identifiers of those profiles to activate, may be {@code null}.
     * @return This context, never {@code null}.
     */
    public DefaultProfileActivationContext setActiveProfileIds(List<String> activeProfileIds) {