org.jclouds.ec2.binders.BindBlockDeviceMappingToIndexedFormParams Maven / Gradle / Ivy

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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.ec2.binders;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static java.lang.String.format;
import static org.jclouds.http.utils.Queries.queryParser;
import static org.jclouds.io.Payloads.newUrlEncodedFormPayload;

import java.util.Map;
import java.util.Map.Entry;

import org.jclouds.ec2.domain.BlockDevice;
import org.jclouds.http.HttpRequest;
import org.jclouds.rest.Binder;

import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Multimap;

/**
 * @author Oleksiy Yarmula
 * @author Adrian Cole
 */
public class BindBlockDeviceMappingToIndexedFormParams implements Binder {

   private static final String deviceNamePattern = "BlockDeviceMapping.%d.DeviceName";
   private static final String deleteOnTerminationPattern = "BlockDeviceMapping.%d.Ebs.DeleteOnTermination";
   private static final String volumeIdPattern = "BlockDeviceMapping.%d.Ebs.VolumeId";

   @SuppressWarnings("unchecked")
   @Override
   public  R bindToRequest(R request, Object input) {
      checkArgument(checkNotNull(input, "input") instanceof Map, "this binder is only valid for Map");
      Map blockDeviceMapping = (Map) input;
      Multimap original = queryParser().apply(request.getPayload().getRawContent().toString());
      ImmutableMultimap.Builder builder = ImmutableMultimap.builder();
      builder.putAll("Action", "ModifyInstanceAttribute");
      int amazonOneBasedIndex = 1; // according to docs, counters must start with 1
      for (Entry ebsBlockDeviceName : blockDeviceMapping.entrySet()) {
         // not null by contract
         builder.put(format(deviceNamePattern, amazonOneBasedIndex), ebsBlockDeviceName.getKey());
         builder.put(format(deleteOnTerminationPattern, amazonOneBasedIndex),
               String.valueOf(ebsBlockDeviceName.getValue().isDeleteOnTermination()));
         builder.put(format(volumeIdPattern, amazonOneBasedIndex), ebsBlockDeviceName.getValue().getVolumeId());
         amazonOneBasedIndex++;
      }
      builder.putAll("InstanceId", original.get("InstanceId"));
      request.setPayload(newUrlEncodedFormPayload(builder.build()));
      return request;
   }

}