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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 static org.jclouds.util.SaxUtils.currentOrNull;

import javax.inject.Inject;

import org.jclouds.aws.util.AWSUtils;
import org.jclouds.ec2.domain.KeyPair;
import org.jclouds.ec2.domain.KeyPair.Builder;
import org.jclouds.http.functions.ParseSax;
import org.jclouds.location.Region;

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

/**
 * 
 * @see 
 */
public class KeyPairResponseHandler extends ParseSax.HandlerForGeneratedRequestWithResult {
   private final Supplier defaultRegion;
   private Builder builder;

   @Inject
   public KeyPairResponseHandler(@Region Supplier defaultRegion) {
      this.defaultRegion = defaultRegion;
   }

   @Override
   public void startDocument() {
      builder = KeyPair.builder().region(defaultRegion.get());
   }

   private StringBuilder currentText = new StringBuilder();

   public KeyPair getResult() {
      String region = AWSUtils.findRegionInArgsOrNull(getRequest());
      if (region != null)
         builder.region(region);
      try {
         return builder.build();
      } finally {
         builder = KeyPair.builder().region(defaultRegion.get());
      }
   }

   public void endElement(String uri, String name, String qName) {
      if (qName.equals("keyFingerprint")) {
         builder.sha1OfPrivateKey(currentOrNull(currentText));
      } else if (qName.equals("keyMaterial")) {
         builder.keyMaterial(currentOrNull(currentText));
      } else if (qName.equals("keyName")) {
         builder.keyName(currentOrNull(currentText));
      }
      currentText.setLength(0);
   }

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