elb/src/main/java/org/jclouds/elb/xml/InstancesResultHandler.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.elb.xml;

import java.util.Set;

import org.jclouds.http.functions.ParseSax;

import com.google.common.collect.Sets;

public class InstancesResultHandler extends ParseSax.HandlerWithResult<Set<String>> {

   private Set<String> instanceIds = Sets.newLinkedHashSet();
   private StringBuilder currentText = new StringBuilder();

   public void endElement(String uri, String localName, String qName) {
      if (qName.equals("InstanceId"))
         instanceIds.add(currentText.toString().trim());
      currentText.setLength(0);
   }

   @Override
   public Set<String> getResult() {
      return instanceIds;
   }

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