@Override
    public boolean presentInConfig(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        Activation activation = profile.getActivation();

        if (activation == null) {
            return false;
        }

        ActivationProperty property = activation.getProperty();

        return property != null;
    }

    @Override
    public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        Activation activation = profile.getActivation();

        if (activation == null) {
            return false;
        }

        String jdk = activation.getJdk();

        if (jdk == null) {
            return false;
        }

    @Override
    public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        Activation activation = profile.getActivation();

        if (activation == null) {
            return false;
        }

        ActivationOS os = activation.getOs();

        if (os == null) {
            return false;
        }

        boolean active = ensureAtLeastOneNonNull(os);

        for (int index = 0; index < profiles.size(); index++) {
            Profile profile = profiles.get(index);
            Activation activation = profile.getActivation();
            if (activation != null) {
                ActivationFile file = activation.getFile();
                if (file != null) {
                    String oldExists = file.getExists();
                    if (isNotEmpty(oldExists)) {

     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @return The execution properties, never {@code null}.
     */
    Map<String, String> getSystemProperties();

    /**
     * Gets the user properties to use for interpolation and profile activation. The user properties have been

     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @return The system properties, never {@code null}.
     */
    Properties getSystemProperties();

    /**
     * Sets the user properties to use for interpolation and profile activation. The user properties have been

    </pluginManagement>
  </build>

  <profiles>
    <profile>
      <!-- NOTE: This test injects the plugin configuration via a profile -->
      <id>maven-core-it</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <build>
        <plugins>
          <plugin>
            <groupId>org.apache.maven.its.plugins</groupId>
            <artifactId>maven-it-plugin-configuration</artifactId>

    <pomVsSettingsInterpolated>${pomVsSettings}</pomVsSettingsInterpolated>
  </properties>

  <profiles>
    <profile>
      <id>pom</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <properties>
        <pomProfile>applied</pomProfile>
        <pomVsSettings>pom</pomVsSettings>
      </properties>
    </profile>
  </profiles>

  <build>

  <profiles>
    <profile>
      <!-- an active but empty profile to ensure profile injection does not interfere with plugin configuration -->
      <id>parent</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
    </profile>
  </profiles>

          <defaultValue>default</defaultValue>
          <description>The identifier of this build profile. This is used for command line
            activation, and identifies profiles to be merged.
          </description>
        </field>
        <field>
          <name>activation</name>
          <version>4.0.0+</version>
          <description>The conditional logic which will automatically trigger the inclusion of this