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jclouds components to access blobstore

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/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds licenses this file
 * to you 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 org.jclouds.javax.annotation.Nullable;

import com.google.common.collect.Multimap;

/**
 * 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);

}