* or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.cache;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;

   * @return an unmodifiable list containing the cause chain starting with {@code throwable}
   * @throws IllegalArgumentException if there is a loop in the causal chain
   */
  public static List<Throwable> getCausalChain(Throwable throwable) {
    checkNotNull(throwable);
    List<Throwable> causes = new ArrayList<>(4);
    causes.add(throwable);

import org.apache.maven.impl.DefaultModelVersionParser;
import org.apache.maven.impl.DefaultRepositoryFactory;
import org.apache.maven.impl.DefaultVersionParser;
import org.apache.maven.impl.InternalSession;
import org.apache.maven.impl.cache.DefaultRequestCacheFactory;
import org.apache.maven.internal.impl.DefaultSession;
import org.apache.maven.model.Dependency;
import org.apache.maven.model.Repository;
import org.apache.maven.model.RepositoryPolicy;

   * and use that list instead.
   */
  public List<Long> asList() {
    /*
     * Typically we cache this kind of thing, but much repeated use of this view is a performance
     * anti-pattern anyway. If we cache, then everyone pays a price in memory footprint even if
     * they never use this method.
     */
    return new AsList(this);
  }

   * ImmutableList.copyOf} and use that list instead.
   */
  public List<Integer> asList() {
    /*
     * Typically we cache this kind of thing, but much repeated use of this view is a performance
     * anti-pattern anyway. If we cache, then everyone pays a price in memory footprint even if
     * they never use this method.
     */
    return new AsList(this);
  }

	return s2.NewReader(nil, s2.ReaderAllocBlock(16<<10))
}}

// metacacheReader allows reading a cache stream.
type metacacheReader struct {
	mr      *msgp.Reader
	current metaCacheEntry
	err     error // stateful error
	closer  func()
	creator func() error
}

// newMetacacheReader creates a new cache reader.
// Nothing will be read from the stream yet.
func newMetacacheReader(r io.Reader) *metacacheReader {

	o.SetFilter()
	if o.Transient {
		o.Create = false
	}

	// We have 2 cases:
	// 1) Cold listing, just list.
	// 2) Returning, but with no id. Start async listing.
	// 3) Returning, with ID, stream from list.
	//
	// If we don't have a list id we must ask the server if it has a cache or create a new.
	if o.ID != "" && !o.Transient {
		// Create or ping with handout...

        defaultDataMap.put(fessConfig.getIndexFieldRole(), roleTypeList);
        // mimetype
        defaultDataMap.put(fessConfig.getIndexFieldMimetype(), mimeType);
        // title
        // content
        // cache
        // digest
        // host
        // site
        // url
        // anchor
        // content_length
        // last_modified
        // id
        // virtual_host

* `expose_headers` - Indica cualquier header de response que debería ser accesible para el navegador. Por defecto es `[]`.
* `max_age` - Establece un tiempo máximo en segundos para que los navegadores almacenen en caché los responses CORS. Por defecto es `600`.

El middleware responde a dos tipos particulares de request HTTP...

### Requests de preflight CORS

}

// BucketOptions provides options for ListBuckets and GetBucketInfo call.
type BucketOptions struct {
	Deleted    bool // true only when site replication is enabled
	Cached     bool // true only when we are requesting a cached response instead of hitting the disk for example ListBuckets() call.
	NoMetadata bool
}

// SetReplicaStatus sets replica status and timestamp for delete operations in ObjectOptions