| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. 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, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.ovf.xml.internal; |
| 20 | |
| 21 | import static org.jclouds.util.SaxUtils.equalsOrSuffix; |
| 22 | |
| 23 | import java.util.Map; |
| 24 | |
| 25 | import javax.inject.Named; |
| 26 | import javax.inject.Provider; |
| 27 | |
| 28 | import org.jclouds.http.functions.ParseSax; |
| 29 | import org.jclouds.ovf.internal.BaseEnvelope; |
| 30 | import org.jclouds.ovf.internal.BaseVirtualSystem; |
| 31 | import org.jclouds.ovf.xml.DiskSectionHandler; |
| 32 | import org.jclouds.ovf.xml.NetworkSectionHandler; |
| 33 | import org.jclouds.ovf.xml.SectionHandler; |
| 34 | import org.jclouds.util.SaxUtils; |
| 35 | import org.xml.sax.Attributes; |
| 36 | import org.xml.sax.SAXException; |
| 37 | |
| 38 | import com.google.common.collect.ImmutableMap; |
| 39 | import com.google.inject.Inject; |
| 40 | |
| 41 | /** |
| 42 | * @author Adrian Cole |
| 43 | */ |
| 44 | public class BaseEnvelopeHandler<V extends BaseVirtualSystem<V>, B extends BaseVirtualSystem.Builder<V>, H extends BaseVirtualSystemHandler<V, B>, E extends BaseEnvelope<V, E>, T extends BaseEnvelope.Builder<V, E>> |
| 45 | extends ParseSax.HandlerWithResult<E> { |
| 46 | |
| 47 | public E getResult() { |
| 48 | try { |
| 49 | return builder.build(); |
| 50 | } finally { |
| 51 | builder = envelopeBuilderProvider.get(); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | protected final H virtualSystemHandler; |
| 56 | protected final DiskSectionHandler diskHandler; |
| 57 | protected final NetworkSectionHandler networkHandler; |
| 58 | protected final Provider<T> envelopeBuilderProvider; |
| 59 | protected T builder; |
| 60 | |
| 61 | @Inject |
| 62 | public BaseEnvelopeHandler(DiskSectionHandler diskHandler, NetworkSectionHandler networkHandler, |
| 63 | H virtualSystemHandler, Provider<T> envelopeBuilderProvider) { |
| 64 | this.virtualSystemHandler = virtualSystemHandler; |
| 65 | this.diskHandler = diskHandler; |
| 66 | this.networkHandler = networkHandler; |
| 67 | this.envelopeBuilderProvider = envelopeBuilderProvider; |
| 68 | this.builder = envelopeBuilderProvider.get(); |
| 69 | } |
| 70 | |
| 71 | @SuppressWarnings("unchecked") |
| 72 | protected SectionHandler defaultSectionHandler = SectionHandler.create(); |
| 73 | |
| 74 | @SuppressWarnings("unchecked") |
| 75 | @Inject(optional = true) |
| 76 | @Named("Envelope") |
| 77 | Map<String, Provider<? extends SectionHandler>> extensionHandlers = ImmutableMap |
| 78 | .<String, Provider<? extends SectionHandler>> of(); |
| 79 | |
| 80 | @SuppressWarnings("unchecked") |
| 81 | protected SectionHandler extensionHandler; |
| 82 | |
| 83 | protected boolean inDisk; |
| 84 | protected boolean inNetwork; |
| 85 | protected boolean inVirtualSystem; |
| 86 | protected boolean inSection; |
| 87 | protected boolean inExtensionSection; |
| 88 | |
| 89 | protected int depth = 0; |
| 90 | |
| 91 | public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException { |
| 92 | Map<String, String> attributes = SaxUtils.cleanseAttributes(attrs); |
| 93 | depth++; |
| 94 | if (depth == 2) { |
| 95 | if (equalsOrSuffix(qName, "DiskSection")) { |
| 96 | inDisk = true; |
| 97 | } else if (equalsOrSuffix(qName, "NetworkSection")) { |
| 98 | inNetwork = true; |
| 99 | } else if (equalsOrSuffix(qName, "VirtualSystem")) { |
| 100 | inVirtualSystem = true; |
| 101 | } else if (extensionHandlers.containsKey(qName) || attributes.containsKey("type") |
| 102 | && extensionHandlers.containsKey(attributes.get("type"))) { |
| 103 | inExtensionSection = true; |
| 104 | extensionHandler = extensionHandlers.get(qName).get(); |
| 105 | } else if (qName.endsWith("Section")) { |
| 106 | inSection = true; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | if (inDisk) { |
| 111 | diskHandler.startElement(uri, localName, qName, attrs); |
| 112 | } else if (inNetwork) { |
| 113 | networkHandler.startElement(uri, localName, qName, attrs); |
| 114 | } else if (inVirtualSystem) { |
| 115 | virtualSystemHandler.startElement(uri, localName, qName, attrs); |
| 116 | } else if (inExtensionSection) { |
| 117 | extensionHandler.startElement(uri, localName, qName, attrs); |
| 118 | } else if (inSection) { |
| 119 | defaultSectionHandler.startElement(uri, localName, qName, attrs); |
| 120 | } |
| 121 | |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public void endElement(String uri, String localName, String qName) { |
| 126 | depth--; |
| 127 | if (depth == 1) { |
| 128 | if (equalsOrSuffix(qName, "DiskSection")) { |
| 129 | inDisk = false; |
| 130 | builder.diskSection(diskHandler.getResult()); |
| 131 | } else if (equalsOrSuffix(qName, "NetworkSection")) { |
| 132 | inNetwork = false; |
| 133 | builder.networkSection(networkHandler.getResult()); |
| 134 | } else if (equalsOrSuffix(qName, "VirtualSystem")) { |
| 135 | inVirtualSystem = false; |
| 136 | builder.virtualSystem(virtualSystemHandler.getResult()); |
| 137 | } else if (extensionHandlers.containsKey(qName)) { |
| 138 | builder.additionalSection(qName, extensionHandler.getResult()); |
| 139 | inExtensionSection = false; |
| 140 | } else if (qName.endsWith("Section")) { |
| 141 | builder.additionalSection(qName, defaultSectionHandler.getResult()); |
| 142 | inSection = false; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | if (inDisk) { |
| 147 | diskHandler.endElement(uri, localName, qName); |
| 148 | } else if (inNetwork) { |
| 149 | networkHandler.endElement(uri, localName, qName); |
| 150 | } else if (inVirtualSystem) { |
| 151 | virtualSystemHandler.endElement(uri, localName, qName); |
| 152 | } else if (inExtensionSection) { |
| 153 | extensionHandler.endElement(uri, localName, qName); |
| 154 | } else if (inSection) { |
| 155 | defaultSectionHandler.endElement(uri, localName, qName); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | @Override |
| 160 | public void characters(char ch[], int start, int length) { |
| 161 | if (inDisk) { |
| 162 | diskHandler.characters(ch, start, length); |
| 163 | } else if (inNetwork) { |
| 164 | networkHandler.characters(ch, start, length); |
| 165 | } else if (inVirtualSystem) { |
| 166 | virtualSystemHandler.characters(ch, start, length); |
| 167 | } else if (inExtensionSection) { |
| 168 | extensionHandler.characters(ch, start, length); |
| 169 | } else if (inSection) { |
| 170 | defaultSectionHandler.characters(ch, start, length); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | } |