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 =

            @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

                Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {
            List<Exclusion> tgt = target.getExclusions();
            if (tgt.isEmpty()) {
                List<Exclusion> src = source.getExclusions();

                for (Exclusion element : src) {
                    Exclusion clone = element.clone();
                    target.addExclusion(clone);
                }
            }
        }

     * @param includes the patterns of files to include, or null/empty for including all files
     * @param excludes the patterns of files to exclude, or null/empty for no exclusion
     * @param useDefaultExcludes whether to augment excludes with default SCM exclusion patterns
     * @return a PathMatcher that can be used to test if paths should be included
     * @throws NullPointerException if baseDirectory is null
     */
    @Nonnull

    </dependency>
    <dependency>
      <groupId>org.eclipse.sisu</groupId>
      <artifactId>org.eclipse.sisu.plexus</artifactId>
      <exclusions>
        <exclusion>
          <groupId>*</groupId>
          <artifactId>*</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-classworlds</artifactId>
    </dependency>

      <artifactId>maven-core-it-support</artifactId>
      <version>1.3</version>
      <scope>runtime</scope>
      <exclusions>
        <exclusion>
          <groupId>commons-lang</groupId>
          <artifactId>commons-lang</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

      <artifactId>truth</artifactId>
      <version>${truth.version}</version>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <!-- use the guava we're building. -->
          <groupId>com.google.guava</groupId>
          <artifactId>guava</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>

      <artifactId>truth</artifactId>
      <version>${truth.version}</version>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <!-- use the guava we're building. -->
          <groupId>com.google.guava</groupId>
          <artifactId>guava</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>

    // ----------------------------------------------------------------------

    /**
     * How the test project is set up:
     *
     * 1. dependencyManagement lists dependencies on a & b,
     *    with an exclusion on c in b.
     * 2. the child project lists a dependency on project a only
     * 3. a depends on b (which is transitive to the child project),
     *    and b depends on c.
     *

        }
    }

    /**
     * Determines whether the specified URL is crawlable based on the exclusion pattern
     * provided in the {@code paramMap}. If the {@code URL_EXCLUDE_PATTERN} key exists in
     * the parameter map, its value is used as a regular expression pattern to match against
     * the given URL. If the URL matches the exclusion pattern, the method returns {@code false},