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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. 
 *
 * ====================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ====================================================================
 */

package org.jclouds.blobstore.domain;

import org.jclouds.io.PayloadEnclosing;

import com.google.common.collect.Multimap;
import com.google.inject.internal.Nullable;

/**
 * Value type for an HTTP Blob service. Blobs are stored in containers and consist of a
 * {@link MutableBlobMetadata#getName name}, {@link Payload payload}, and
 * {@link MutableBlobMetadata metadata}.
 * 
 * @author Adrian Cole
 */
public interface Blob extends PayloadEnclosing, Comparable {
   /**
    * Allows you to construct blobs without knowing the implementation type
    */
   public interface Factory {
      /**
       * Creates a blob, optionally setting its metadata to a known value. This is useful in making
       * copies of blobs.
       */
      Blob create(@Nullable MutableBlobMetadata metadata);
   }

   /**
    * @return System and User metadata relevant to this object.
    */
   MutableBlobMetadata getMetadata();

   /**
    * @return headers returned from the services
    */
   Multimap getAllHeaders();

   /**
    * 
    * @see #getAllHeaders
    */
   void setAllHeaders(Multimap allHeaders);

}