}

    /**
     * Returns artifacts exported by Maven core and core extensions. Artifacts are identified by their
     * groupId:artifactId string key.
     */
    public Set<String> getExportedArtifacts() {
        return artifacts;
    }

    /**
     * Returns packages exported by Maven core and core extensions.
     */
    public Map<String, ClassLoader> getExportedPackages() {

    public ClassRealm getClassRealm() {
        return realm;
    }

    /**
     * Returns artifacts exported by the extension, identified by groupId:artifactId string key.
     */
    public Set<String> getExportedArtifacts() {
        return artifacts;
    }

    /**
     * Returns classpath elements exported by the extension.
     */
    public Set<String> getExportedPackages() {
        return packages;
    }

public interface ArtifactFilterManager {
    /**
     * Returns a filter for core + extension artifacts.
     *
     * @return the artifact filter
     * @deprecated use {@code META-INF/maven/extension.xml} to define artifacts exported by Maven core and plugin
     *             extensions.
     */
    ArtifactFilter getArtifactFilter();

    /**
     * Returns a filter for only the core artifacts.
     *
     * @return the artifact filter

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

import java.util.Set;

/**
 * @deprecated use {@code META-INF/maven/extension.xml} to define artifacts exported by Maven core extensions.
 */
@Deprecated
public interface ArtifactFilterManagerDelegate {

    void addExcludes(Set<String> excludes);

    void addCoreExcludes(Set<String> excludes);

    // this is a live injected collection
    private final List<ClassRealmManagerDelegate> delegates;

    private final ClassRealm mavenApiRealm;

    /**
     * Patterns of artifacts provided by maven core and exported via maven api realm. These artifacts are filtered from
     * plugin and build extensions realms to avoid presence of duplicate and possibly conflicting classes on classpath.
     */
    private final Set<String> providedArtifacts;

                List<String> exports = exportedPackages.get(extensionRealm);

                if (exports == null || exports.isEmpty()) {
                    /*
                     * Most existing extensions don't define exported packages, i.e. no classes are to be exposed to
                     * plugins, yet the components provided by the extension (e.g. artifact handlers) must be

    <exportedPackage>org.fusesource.jansi.Ansi</exportedPackage>

    <!-- javax.inject (JSR-330) -->
    <exportedPackage>javax.inject.*</exportedPackage>
    <!-- javax.enterprise.inject (JSR-299): Must never be exported if needed at plugin level, plugin adds it
         there is no justification to get it at Maven level and leaking it will conflict.
    <exportedPackage>javax.enterprise.util.*</exportedPackage>

            if (validationReportLevel == ValidationReportLevel.VERBOSE) {
                logger.warn(
                        "Fix reported issues by adjusting plugin configuration or by upgrading above listed plugins. If no upgrade available, please notify plugin maintainers about reported issues.");
            }
            logger.warn(

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link ToolchainsBuilderException}.
     *

    /**
     * OS family that can be tested for. {@value}
     */
    private static final String FAMILY_OS400 = "os/400";

    /**
     * OpenJDK is reported to call MacOS X "Darwin"
     *
     * @see <a href="https://issues.apache.org/bugzilla/show_bug.cgi?id=44889">bugzilla issue</a>
     * @see <a href="https://issues.apache.org/jira/browse/HADOOP-3318">HADOOP-3318</a>