| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.aws.ec2.xml; |
| 20 | |
| 21 | import java.util.Set; |
| 22 | |
| 23 | import javax.inject.Inject; |
| 24 | |
| 25 | import org.jclouds.aws.ec2.domain.SpotInstanceRequest; |
| 26 | import org.jclouds.http.HttpRequest; |
| 27 | import org.jclouds.http.functions.ParseSax; |
| 28 | import org.jclouds.http.functions.ParseSax.HandlerWithResult; |
| 29 | import org.xml.sax.Attributes; |
| 30 | import org.xml.sax.SAXException; |
| 31 | |
| 32 | import com.google.common.collect.ImmutableSet; |
| 33 | import com.google.common.collect.ImmutableSet.Builder; |
| 34 | |
| 35 | /** |
| 36 | * @author Adrian Cole |
| 37 | */ |
| 38 | public class SpotInstancesHandler extends ParseSax.HandlerWithResult<Set<SpotInstanceRequest>> { |
| 39 | |
| 40 | private final Builder<SpotInstanceRequest> spotRequests = ImmutableSet.<SpotInstanceRequest> builder(); |
| 41 | private final SpotInstanceHandler spotRequestHandler; |
| 42 | private int itemDepth; |
| 43 | |
| 44 | @Inject |
| 45 | public SpotInstancesHandler(SpotInstanceHandler spotRequestHandler) { |
| 46 | this.spotRequestHandler = spotRequestHandler; |
| 47 | } |
| 48 | |
| 49 | public Set<SpotInstanceRequest> getResult() { |
| 50 | return spotRequests.build(); |
| 51 | } |
| 52 | |
| 53 | @Override |
| 54 | public HandlerWithResult<Set<SpotInstanceRequest>> setContext(HttpRequest request) { |
| 55 | spotRequestHandler.setContext(request); |
| 56 | return super.setContext(request); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { |
| 61 | if (qName.equals("item")) |
| 62 | itemDepth++; |
| 63 | if (itemDepth >= 1) |
| 64 | spotRequestHandler.startElement(uri, localName, qName, attributes); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public void endElement(String uri, String localName, String qName) throws SAXException { |
| 69 | if (qName.equals("item") && itemDepth == 1) { |
| 70 | spotRequests.add(spotRequestHandler.getResult()); |
| 71 | } |
| 72 | if (qName.equals("item")) |
| 73 | itemDepth--; |
| 74 | if (itemDepth >= 1) |
| 75 | spotRequestHandler.endElement(uri, localName, qName); |
| 76 | } |
| 77 | |
| 78 | public void characters(char ch[], int start, int length) { |
| 79 | if (itemDepth >= 1) |
| 80 | spotRequestHandler.characters(ch, start, length); |
| 81 | } |
| 82 | |
| 83 | } |