private transient volatile @Nullable CacheEntry<K, V> cacheEntry1;
  private transient volatile @Nullable CacheEntry<K, V> cacheEntry2;

  MapRetrievalCache(Map<K, V> backingMap) {
    super(backingMap);
  }

  @SuppressWarnings("unchecked") // Safe because we only cast if key is found in map.
  @Override
  @Nullable V get(Object key) {
    checkNotNull(key);
    V value = getIfCached(key);
    if (value != null) {
      return value;

import static java.util.Arrays.asList;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import junit.framework.Test;

/**
 * Tests the {@link Map} implementations of {@link java.util}, suppressing tests that trip known
 * bugs in OpenJDK 6 or higher.
 *
 * @author Kevin Bourrillion
 */

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.artifact.resolver;

import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.repository.ArtifactRepository;

     *
     * @param type The component type.
     * @return The map of components. The map may be empty if no components found.
     * @param <T> The component type.
     * @throws LookupException if there is some provisioning related issue.
     */
    @Nonnull
    <T> Map<String, T> lookupMap(Class<T> type);

@NullMarked
public interface TestMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
    extends TestContainerGenerator<Map<K, V>, Map.Entry<K, V>> {
  K[] createKeyArray(int length);

  V[] createValueArray(int length);

  }

  @Override
  Table<String, Integer, Character> makeTable() {
    return ArrayTable.create(asList("foo", "bar", "dog"), asList(1, 2, 3));
  }

  @Override
  protected Map<String, Map<Integer, Character>> makeEmptyMap() {
    throw new UnsupportedOperationException();
  }

        };

    LoadingCache<String, String> cache = CacheBuilder.newBuilder().build(computeFunction);
    ConcurrentMap<String, String> map = cache.asMap();
    map.put(refreshKey, refreshKey);
    assertEquals(1, map.size());
    assertFalse(map.containsKey(getKey));
    assertSame(refreshKey, map.get(refreshKey));

    new Thread() {
      @Override
      public void run() {
        cache.getUnchecked(getKey);

    cache.put(10, 20);

    Map<Integer, Integer> map = cache.getAll(ImmutableList.of(10, 20, 30, 54, 443, 1));

    assertEquals(Integer.valueOf(20), map.get(10));
    assertEquals(Integer.valueOf(0), map.get(20));
    assertEquals(Integer.valueOf(1), map.get(30));
    assertEquals(Integer.valueOf(2), map.get(54));
    assertEquals(Integer.valueOf(3), map.get(443));
    assertEquals(Integer.valueOf(4), map.get(1));

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

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.Map;

import org.apache.maven.artifact.UnknownRepositoryLayoutException;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;

    ) : ParallelizationMethod()

    companion object {
        private val objectMapper = ObjectMapper()

        fun fromJson(jsonObject: Map<String, Any>): ParallelizationMethod {
            val methodJsonNode =
                (jsonObject["parallelizationMethod"] as? Map<*, *>)?.let { objectMapper.valueToTree<JsonNode>(it) }
                    ?: return None

            return when (methodJsonNode.get("name")?.asText()) {