dependency.getOptional() != null ? dependency.isOptional() : null,
                exclusions);
    }

    private Exclusion convert(org.apache.maven.api.model.Exclusion exclusion) {
        return new Exclusion(exclusion.getGroupId(), exclusion.getArtifactId(), "*", "*");
    }

    private void setArtifactProperties(ArtifactDescriptorResult result, Model model) {
        String downloadUrl = null;

import org.apache.maven.model.Exclusion;

/**
 * Filter to exclude from a list of artifact patterns.
 */
public class ExclusionArtifactFilter implements ArtifactFilter {

    private final List<Exclusion> exclusions;
    private final List<Predicate<Artifact>> predicates;

    public ExclusionArtifactFilter(List<Exclusion> exclusions) {
        this.exclusions = exclusions;
        this.predicates =

        }

        if (!d.getExclusions().isEmpty()) {
            List<String> exclusions = new ArrayList<>();

            for (Exclusion exclusion : d.getExclusions()) {
                exclusions.add(exclusion.getGroupId() + ':' + exclusion.getArtifactId());
            }

            artifact.setDependencyFilter(new ExcludesArtifactFilter(exclusions));
        }

        return artifact;
    }

        <version>${commonsCliVersion}</version>
        <exclusions>
          <exclusion>
            <artifactId>commons-lang</artifactId>
            <groupId>commons-lang</groupId>
          </exclusion>
          <exclusion>
            <artifactId>commons-logging</artifactId>
            <groupId>commons-logging</groupId>
          </exclusion>
        </exclusions>
      </dependency>
    <dependency>

        <version>${commonsCliVersion}</version>
        <exclusions>
          <exclusion>
            <artifactId>commons-lang</artifactId>
            <groupId>commons-lang</groupId>
          </exclusion>
          <exclusion>
            <artifactId>commons-logging</artifactId>
            <groupId>commons-logging</groupId>
          </exclusion>
        </exclusions>
      </dependency>
    <dependency>

        List<Exclusion> exclusions = dependency.getExclusions();
        if (importMgmt != null && !exclusions.isEmpty()) {
            // Dependency excluded from import.
            List<Dependency> dependencies = importMgmt.getDependencies().stream()
                    .filter(candidate -> exclusions.stream().noneMatch(exclusion -> match(exclusion, candidate)))

                && equals(d1.getExclusions(), d2.getExclusions());
    }

    private boolean equals(Collection<Exclusion> ce1, Collection<Exclusion> ce2) {
        if (ce1.size() == ce2.size()) {
            Iterator<Exclusion> i1 = ce1.iterator();
            Iterator<Exclusion> i2 = ce2.iterator();
            while (i1.hasNext() && i2.hasNext()) {
                if (!equals(i1.next(), i2.next())) {

            @Nonnull
            @Override
            public Collection<Exclusion> getExclusions() {
                return new MappedCollection<>(dependency.getExclusions(), this::toExclusion);
            }

            private Exclusion toExclusion(org.apache.maven.api.model.Exclusion exclusion) {
                return new Exclusion() {
                    @Nullable
                    @Override

        assertEquals(1, ((List<?>) pom.getValue("dependencyManagement/dependencies[1]/exclusions")).size());
        assertEquals(
                "org.apache.maven.its", pom.getValue("dependencyManagement/dependencies[1]/exclusions[1]/groupId"));
        assertEquals(
                "excluded-managed-dep", pom.getValue("dependencyManagement/dependencies[1]/exclusions[1]/artifactId"));

        /*

        Logic for transitive global exclusions

        List<String> exclusions = new ArrayList<String>();

        for ( Dependency d : project.getDependencies() )
        {
            if ( d.getExclusions() != null )
            {
                for ( Exclusion e : d.getExclusions() )
                {
                    exclusions.add(  e.getGroupId() + ":" + e.getArtifactId() );
                }