rackspace/src/main/java/org/jclouds/rackspace/cloudfiles/binders/BindCFObjectToPayload.java

/**
 *
 * Copyright (C) 2009 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * 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.rackspace.cloudfiles.binders;

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

import javax.inject.Inject;
import javax.inject.Named;
import javax.ws.rs.core.HttpHeaders;

import org.jclouds.blobstore.binders.BindBlobToPayloadAndUserMetadataToHeadersWithPrefix;
import org.jclouds.blobstore.reference.BlobStoreConstants;
import org.jclouds.encryption.EncryptionService;
import org.jclouds.http.HttpRequest;
import org.jclouds.rackspace.cloudfiles.blobstore.functions.ObjectToBlob;
import org.jclouds.rackspace.cloudfiles.domain.CFObject;

public class BindCFObjectToPayload extends BindBlobToPayloadAndUserMetadataToHeadersWithPrefix {
   private final ObjectToBlob object2Blob;
   private final EncryptionService encryptionService;

   @Inject
   public BindCFObjectToPayload(ObjectToBlob object2Blob,
            @Named(BlobStoreConstants.PROPERTY_USER_METADATA_PREFIX) String prefix,
            EncryptionService encryptionService) {
      super(prefix, encryptionService);
      this.object2Blob = object2Blob;
      this.encryptionService = encryptionService;
   }

   public void bindToRequest(HttpRequest request, Object payload) {
      CFObject object = (CFObject) payload;
      if (object.getContentLength() != null && object.getContentLength() >= 0) {
         checkArgument(object.getContentLength() <= 5 * 1024 * 1024 * 1024,
                  "maximum size for put object is 5GB");
         request.getHeaders().put(HttpHeaders.CONTENT_LENGTH, object.getContentLength() + "");
      } else {
         // Enable "chunked"/"streamed" data, where the size needn't be known in advance.
         request.getHeaders().put("Transfer-Encoding", "chunked");
      }

      super.bindToRequest(request, object2Blob.apply(object));
      if (object.getInfo().getHash() != null) {
         request.getHeaders().put(HttpHeaders.ETAG,
                  encryptionService.toHexString(object.getInfo().getHash()));
         request.getHeaders().removeAll("Content-MD5");
      }

   }

}