import java.util.Map;
import java.util.Set;
import java.util.function.Predicate;

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

/**
 * Container for storing the request from the user to activate or de-activate certain profiles and optionally fail the
 * build if those profiles do not exist.
 */
public class ProfileActivation {
    private final Map<String, ActivationSettings> activations = new HashMap<>();

    /**

     */
    String PROPERTY_NAME_PACKAGING = "packaging";

    /**
     * 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.
     *

        if (name == null || name.isEmpty()) {
            problems.add(
                    BuilderProblem.Severity.ERROR,
                    ModelProblem.Version.BASE,
                    "The property name is required to activate the profile " + profile.getId(),
                    property.getLocation(""));
            return false;
        }

        String sysValue = context.getUserProperties().get(name);
        if (sysValue == null) {

    <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>
    <class>
      <name>ActivationProperty</name>
      <version>4.0.0+</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>

    <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>

            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);
            }

     */
    @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();

    /**

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 {
        /**

        // do nothing
    }

    /**
     * Invoked after MavenSession instance has been created.
     *
     * This callback is intended to allow extensions to inject execution properties,
     * activate profiles and perform similar tasks that affect MavenProject
     * instance construction.
     *
     * @param session the Maven session
     * @throws MavenExecutionException in case of issue
     */