* either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.beans.impl;

import static java.util.Collections.unmodifiableCollection;
import static org.codelibs.core.collection.CollectionsUtil.newArrayList;
import static org.codelibs.core.collection.CollectionsUtil.newHashMap;
import static org.codelibs.core.collection.CollectionsUtil.newHashSet;

 * object being tested, but the reverse could not be true. This behavior is consistent with the
 * JDK's collection wrappers, such as {@link java.util.Collections#unmodifiableCollection}. Use an
 * interface-specific subclass of {@code ForwardingObject}, such as {@link ForwardingList}, to
 * preserve equality behavior, or override {@code equals} directly.
 *

                map(getMavenProject(project).getAttachedArtifacts(), a -> getSession(project)
                        .getArtifact(ProducedArtifact.class, RepositoryUtils.toArtifact(a)));
        return Collections.unmodifiableCollection(attached);
    }

    @Override
    @Nonnull
    public Collection<ProducedArtifact> getAllArtifacts(@Nonnull Project project) {
        requireNonNull(project, "project cannot be null");

     * "expected in provided scope" type of checks.
     */
    static final Collection<String> EXPECTED_PROVIDED_SCOPE_EXCLUSIONS_GA =
            Collections.unmodifiableCollection(Arrays.asList(
                    "org.apache.maven:maven-archiver", "org.apache.maven:maven-jxr", "org.apache.maven:plexus-utils"));

    }

    @Override
    public Collection<ArtifactMetadata> getMetadataList() {
        if (metadataMap == null) {
            return Collections.emptyList();
        }

        return Collections.unmodifiableCollection(metadataMap.values());
    }

    // ----------------------------------------------------------------------
    // Object overrides
    // ----------------------------------------------------------------------

                        Artifact.SCOPE_PROVIDED,
                        Artifact.SCOPE_RUNTIME,
                        Artifact.SCOPE_TEST);
            }
        }
        return Collections.unmodifiableCollection(scopes);
    }

    public void execute(final MavenSession session, final List<MojoExecution> mojoExecutions)
            throws LifecycleExecutionException {

 *
 * <ul>
 *   <li><b>Shallow immutability.</b> Elements can never be added, removed or replaced in this
 *       collection. This is a stronger guarantee than that of {@link
 *       Collections#unmodifiableCollection}, whose contents change whenever the wrapped collection
 *       is modified.
 *   <li><b>Null-hostility.</b> This collection will never contain a null element.

      } else if (collection instanceof List) {
        return Collections.unmodifiableList((List<E>) collection);
      } else {
        return Collections.unmodifiableCollection(collection);
      }
    }

    @Override
    Collection<V> wrapCollection(@ParametricNullness K key, Collection<V> collection) {
      if (collection instanceof List) {

      return unmodifiableMap(Maps.transformValues(super.rowMap(), Collections::unmodifiableMap));
    }

    @Override
    public Collection<V> values() {
      return Collections.unmodifiableCollection(super.values());
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**

    return unmodifiableCollectionSubclass(output);
  }

  <E extends @Nullable Object> Collection<E> unmodifiableCollectionSubclass(
      Collection<E> collection) {
    return Collections.unmodifiableCollection(collection);
  }

  @Override
  public void clear() {
    // Clear each collection, to make previously returned collections empty.
    for (Collection<V> collection : map.values()) {