}

    /**
     * Mark a profile as required and activated.
     * @param id The identifier of the profile.
     */
    public void activateRequiredProfile(String id) {
        this.activations.put(id, ActivationSettings.activated());
    }

    /**
     * Mark a profile as optional and activated.
     * @param id The identifier of the profile.
     */

      <description><![CDATA[
        This is an activator which will detect an operating system's attributes in order to activate
        its profile.
      ]]></description>
      <fields>
        <field>
          <name>name</name>
          <version>1.0.0</version>
          <type>String</type>
          <description>The name of the OS to be used to activate a profile</description>
        </field>
        <field>

    }

    /**
     * Mark a project as required and activated.
     * @param selector The selector of the project.
     */
    public void activateRequiredProject(String selector) {
        this.activations.add(new ProjectActivationSettings(selector, ActivationSettings.activated()));
    }

    /**
     * Mark a project as optional and activated.
     * @param selector The selector of the project.
     */

 */
package org.apache.maven.execution;

/**
 * Describes whether a target should be activated or not, and if that is required or optional.
 *
 * @param active Should the target be active?
 * @param optional Should the build continue if the target is not present?
 * @param recurse Should the target be activated and its children be activated?
 */
public record ActivationSettings(boolean active, boolean optional, boolean recurse) {

   |
   | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
   | section of this document (settings.xml) - will be discussed later. Another way essentially
   | relies on the detection of a property, either matching a particular value for the property,
   | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a

      <description>
        This is an activator which will detect an operating system's attributes in order to activate
        its profile.
      </description>
      <fields>
        <field>
          <name>name</name>
          <version>1.0.0+</version>
          <type>String</type>
          <description>
            The name of the OS to be used to activate a profile.
          </description>
        </field>

    /**
     * Gets the identifiers of those profiles that should be activated by explicit demand.
     *
     * @return The identifiers of those profiles to activate, never {@code null}.
     */
    List<String> getActiveProfileIds();

    /**
     * Gets the identifiers of those profiles that should be deactivated by explicit demand.
     *

        request.setSystemProperties(sysProperties);

        ModelBuildingResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated-1", result.getEffectiveModel().getProperties().get("profile.file"));
        assertNull(result.getEffectiveModel().getProperties().get("profile.miss"));
    }

/**
 * Determines whether a profile should be activated.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface ProfileActivator {

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

     *            {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The profiles that have been activated, never {@code null}.
     */
    List<Profile> getActiveProfiles(
            Collection<Profile> profiles, ProfileActivationContext context, ModelProblemCollector problems);