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/*
 * 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.ec2.xml;

import java.util.Date;
import java.util.Map;

import org.jclouds.date.DateService;
import org.jclouds.ec2.domain.Attachment;
import org.jclouds.ec2.domain.BlockDevice;
import org.jclouds.http.functions.ParseSax;

import shaded.com.google.common.collect.Maps;
import shaded.com.google.inject.Inject;

public class BlockDeviceMappingHandler extends
         ParseSax.HandlerWithResult> {
   private StringBuilder currentText = new StringBuilder();

   private Map ebsBlockDevices = Maps.newHashMap();
   private String deviceName;
   private String volumeId;
   private boolean deleteOnTermination = true;  // correct default is true.
   private Attachment.Status attachmentStatus;
   private Date attachTime;

   protected final DateService dateService;

   @Inject 
   public BlockDeviceMappingHandler(DateService dateService) {
      this.dateService = dateService;
   }

   public Map getResult() {
      return ebsBlockDevices;
   }

   public void endElement(String uri, String name, String qName) {
      if (qName.equals("deviceName")) {
         deviceName = currentText.toString().trim();
      } else if (qName.equals("volumeId")) {
         volumeId = currentText.toString().trim();
      } else if (qName.equals("deleteOnTermination")) {
         deleteOnTermination = Boolean.parseBoolean(currentText.toString().trim());
      } else if (qName.equals("status")) {
         attachmentStatus = Attachment.Status.fromValue(currentText.toString().trim());
      } else if (qName.equals("attachTime")) {
         attachTime = dateService.iso8601DateOrSecondsDateParse(currentText.toString().trim());
      } else if (qName.equals("item")) {
         ebsBlockDevices.put(deviceName, new BlockDevice(volumeId, attachmentStatus, attachTime, deleteOnTermination));
          this.volumeId = null;
          this.deviceName = null;
          this.deleteOnTermination = true;
          this.attachmentStatus = null;
          this.attachTime = null;
      }
      currentText.setLength(0);
   }

   public void characters(char[] ch, int start, int length) {
      currentText.append(ch, start, length);
   }
}