package org.apache.maven.api;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nullable;

/**
 * A dependency exclusion.
 *
 * @since 4.0.0
 * @see DependencyCoordinates#getExclusions()
 */
@Experimental
public interface Exclusion {
    @Nullable
    String getGroupId();

    @Nullable
    String getArtifactId();

  <dependencies>
    <dependency>
      <groupId>gid</groupId>
      <artifactId>aid</artifactId>
      <version>1.0</version>
      <exclusions>
        <exclusion>
          <groupId></groupId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

  <dependencies>
    <dependency>
      <groupId>gid</groupId>
      <artifactId>aid</artifactId>
      <version>1.0</version>
      <exclusions>
        <exclusion>
          <groupId>test?</groupId>
          <artifactId>*</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

				</exclusion>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>jcl-over-slf4j</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.activation</groupId>
					<artifactId>activation</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.activation</groupId>
					<artifactId>javax.activation-api</artifactId>
				</exclusion>
				<exclusion>

            if (exclusion != null) {
                if (this.exclusions.isEmpty()) {
                    this.exclusions = new ArrayList<>();
                }
                this.exclusions.add(exclusion);
            }
            return this;
        }

        public DependencyCoordinatesFactoryRequest build() {

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

    private Exclusion convert(org.apache.maven.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 =

                exclusions);
    }

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

    public static ArtifactTypeRegistry newArtifactTypeRegistry(ArtifactHandlerManager handlerManager) {
        return new MavenArtifactTypeRegistry(handlerManager);

            @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

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Exclusion}.
 *
 */
class ExclusionTest {

    @Test
    void testHashCodeNullSafe() {
        new Exclusion().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Exclusion().equals(null));

        new Exclusion().equals(new Exclusion());
    }

    @Test
    void testEqualsIdentity() {