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ComputeService implementation of Slicehost datacenters

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/**
 * 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.slicehost.xml;

import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;

import javax.annotation.Resource;

import org.jclouds.http.functions.ParseSax;
import org.jclouds.logging.Logger;
import org.jclouds.slicehost.domain.Backup;
import org.xml.sax.SAXException;

/**
 * @author Adrian Cole
 */
public class BackupHandler extends ParseSax.HandlerWithResult {
   private StringBuilder currentText = new StringBuilder();

   private int id;
   private String name;
   private String sliceId;
   private Date date;

   private Backup backup;
   @Resource
   protected Logger logger = Logger.NULL;

   public Backup getResult() {
      return backup;
   }

   @Override
   public void endElement(String uri, String localName, String qName) throws SAXException {
      if (qName.equalsIgnoreCase("id")) {
         id = Integer.parseInt(currentText.toString().trim());
      } else if (qName.equalsIgnoreCase("name")) {
         this.name = currentText.toString().trim();
      } else if (qName.equalsIgnoreCase("slice_id")) {
         sliceId = currentText.toString().trim();
      } else if (qName.equalsIgnoreCase("date")) {
         try {
            date = DateFormat.getInstance().parse(currentText.toString().trim());
         } catch (ParseException e) {
            logger.warn(e, "error parsing: %s", currentText.toString().trim());
         }
      } else if (qName.equalsIgnoreCase("backup")) {
         this.backup = new Backup(id, name, sliceId, date);
         this.id = -1;
         this.name = null;
         this.sliceId = null;
         this.date = null;
      }
      currentText = new StringBuilder();
   }

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