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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.aws.ec2.xml;

import javax.inject.Inject;

import org.jclouds.aws.ec2.domain.PlacementGroup;
import org.jclouds.aws.ec2.domain.PlacementGroup.State;
import org.jclouds.aws.util.AWSUtils;
import org.jclouds.http.functions.ParseSax;
import org.jclouds.location.Region;

import shaded.com.google.common.base.Supplier;

public class PlacementGroupHandler extends
         ParseSax.HandlerForGeneratedRequestWithResult {
   private StringBuilder currentText = new StringBuilder();

   @Inject
   @Region
   Supplier defaultRegion;

   private String name;
   private String strategy = "cluster";
   private State state;

   public PlacementGroup getResult() {
      String region = AWSUtils.findRegionInArgsOrNull(getRequest());
      if (region == null)
         region = defaultRegion.get();
      PlacementGroup returnVal = new PlacementGroup(region, name, strategy, state);
      this.name = null;
      this.strategy = "cluster";
      this.state = null;
      return returnVal;
   }

   public void endElement(String uri, String name, String qName) {
      if (qName.equals("groupName")) {
         this.name = currentText.toString().trim();
      } else if (qName.equals("strategy")) {
         strategy = currentText.toString().trim();
      } else if (qName.equals("state")) {
         state = PlacementGroup.State.fromValue(currentText.toString().trim());
      }
      currentText.setLength(0);
   }

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