/**
 * 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.atmos.binders;

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

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

import org.jclouds.atmos.domain.AtmosObject;
import org.jclouds.http.HttpRequest;
import org.jclouds.rest.Binder;

/**
 * @author Adrian Cole
 */
@Singleton
public class BindMetadataToHeaders implements Binder {
   private final BindUserMetadataToHeaders metaBinder;

   @Inject
   protected BindMetadataToHeaders(BindUserMetadataToHeaders metaBinder) {
      this.metaBinder = metaBinder;
   }

   @Override
   public <R extends HttpRequest> R bindToRequest(R request, Object input) {
      checkArgument(checkNotNull(input, "input") instanceof AtmosObject, "this binder is only valid for AtmosObject!");
      checkNotNull(request, "request");

      AtmosObject object = AtmosObject.class.cast(input);
      checkNotNull(object.getPayload(), "object payload");
      checkArgument(object.getPayload().getContentMetadata().getContentLength() != null,
            "contentLength must be set, streaming not supported");
      return metaBinder.bindToRequest(request, object.getUserMetadata());
   }
}