/**
 * 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.openstack.swift.blobstore.functions;

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

import org.jclouds.blobstore.domain.MutableBlobMetadata;
import org.jclouds.blobstore.domain.StorageType;
import org.jclouds.blobstore.domain.internal.MutableBlobMetadataImpl;
import org.jclouds.blobstore.strategy.IfDirectoryReturnNameStrategy;
import org.jclouds.crypto.CryptoStreams;
import org.jclouds.openstack.swift.domain.MutableObjectInfoWithMetadata;
import org.jclouds.openstack.swift.domain.ObjectInfo;

import com.google.common.base.Function;

/**
 * @author Adrian Cole
 */
@Singleton
public class ObjectToBlobMetadata implements Function<ObjectInfo, MutableBlobMetadata> {
   private final IfDirectoryReturnNameStrategy ifDirectoryReturnName;

   @Inject
   public ObjectToBlobMetadata(IfDirectoryReturnNameStrategy ifDirectoryReturnName) {
      this.ifDirectoryReturnName = ifDirectoryReturnName;
   }

   public MutableBlobMetadata apply(ObjectInfo from) {
      if (from == null)
         return null;
      MutableBlobMetadata to = new MutableBlobMetadataImpl();
      to.getContentMetadata().setContentMD5(from.getHash());
      if (from.getContentType() != null)
         to.getContentMetadata().setContentType(from.getContentType());
      if (from.getHash() != null)
         to.setETag(CryptoStreams.hex(from.getHash()));
      to.setName(from.getName());
      to.setContainer(from.getContainer());
      to.setUri(from.getUri());
      to.getContentMetadata().setContentLength(from.getBytes());
      if (from.getLastModified() != null)
         to.setLastModified(from.getLastModified());
      if (from instanceof MutableObjectInfoWithMetadata)
         to.setUserMetadata(((MutableObjectInfoWithMetadata) from).getMetadata());
      String directoryName = ifDirectoryReturnName.execute(to);
      if (directoryName != null) {
         to.setName(directoryName);
         to.setType(StorageType.RELATIVE_PATH);
      } else {
         to.setType(StorageType.BLOB);
      }
      return to;
   }
}
