cloudsigma2/src/main/java/org/jclouds/cloudsigma2/binders/BindDrivesToJson.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.cloudsigma2.binders;

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;

import org.jclouds.cloudsigma2.domain.DriveInfo;
import org.jclouds.cloudsigma2.functions.DriveToJson;
import org.jclouds.http.HttpRequest;
import org.jclouds.rest.Binder;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.ws.rs.core.MediaType;

import java.util.List;

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

@Singleton
public class BindDrivesToJson implements Binder {
   private final DriveToJson createDriveRequestJson;

   @Inject
   public BindDrivesToJson(DriveToJson createDriveRequestToMap) {
      this.createDriveRequestJson = createDriveRequestToMap;
   }

   @SuppressWarnings("unchecked")
   @Override
   public <R extends HttpRequest> R bindToRequest(R request, Object payload) {
      checkArgument(payload instanceof List, "this binder is only valid for List<DriveInfo>!");
      List<?> list = List.class.cast(payload);
      for (Object o : list) {
         checkArgument(o instanceof DriveInfo, "this binder is only valid for List<DriveInfo>!");
      }
      List<DriveInfo> drivesList = (List<DriveInfo>) payload;
      JsonArray drivesJsonArray = new JsonArray();

      for (DriveInfo drive : drivesList) {
         JsonObject driveObject = createDriveRequestJson.apply(drive);
         drivesJsonArray.add(driveObject);
      }

      JsonObject json = new JsonObject();
      json.add("objects", drivesJsonArray);

      request.setPayload(json.toString());
      request.getPayload().getContentMetadata().setContentType(MediaType.APPLICATION_JSON);
      return request;
   }
}