/**
* 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.ovf.xml.internal;
import static org.jclouds.util.SaxUtils.equalsOrSuffix;
import java.util.Map;
import javax.inject.Named;
import javax.inject.Provider;
import org.jclouds.http.functions.ParseSax;
import org.jclouds.ovf.internal.BaseEnvelope;
import org.jclouds.ovf.internal.BaseVirtualSystem;
import org.jclouds.ovf.xml.DiskSectionHandler;
import org.jclouds.ovf.xml.NetworkSectionHandler;
import org.jclouds.ovf.xml.SectionHandler;
import org.jclouds.util.SaxUtils;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import com.google.common.collect.ImmutableMap;
import com.google.inject.Inject;
/**
* @author Adrian Cole
*/
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>>
extends ParseSax.HandlerWithResult<E> {
public E getResult() {
try {
return builder.build();
} finally {
builder = envelopeBuilderProvider.get();
}
}
protected final H virtualSystemHandler;
protected final DiskSectionHandler diskHandler;
protected final NetworkSectionHandler networkHandler;
protected final Provider<T> envelopeBuilderProvider;
protected T builder;
@Inject
public BaseEnvelopeHandler(DiskSectionHandler diskHandler, NetworkSectionHandler networkHandler,
H virtualSystemHandler, Provider<T> envelopeBuilderProvider) {
this.virtualSystemHandler = virtualSystemHandler;
this.diskHandler = diskHandler;
this.networkHandler = networkHandler;
this.envelopeBuilderProvider = envelopeBuilderProvider;
this.builder = envelopeBuilderProvider.get();
}
@SuppressWarnings("unchecked")
protected SectionHandler defaultSectionHandler = SectionHandler.create();
@SuppressWarnings("unchecked")
@Inject(optional = true)
@Named("Envelope")
Map<String, Provider<? extends SectionHandler>> extensionHandlers = ImmutableMap
.<String, Provider<? extends SectionHandler>> of();
@SuppressWarnings("unchecked")
protected SectionHandler extensionHandler;
protected boolean inDisk;
protected boolean inNetwork;
protected boolean inVirtualSystem;
protected boolean inSection;
protected boolean inExtensionSection;
protected int depth = 0;
public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException {
Map<String, String> attributes = SaxUtils.cleanseAttributes(attrs);
depth++;
if (depth == 2) {
if (equalsOrSuffix(qName, "DiskSection")) {
inDisk = true;
} else if (equalsOrSuffix(qName, "NetworkSection")) {
inNetwork = true;
} else if (equalsOrSuffix(qName, "VirtualSystem")) {
inVirtualSystem = true;
} else if (extensionHandlers.containsKey(qName) || attributes.containsKey("type")
&& extensionHandlers.containsKey(attributes.get("type"))) {
inExtensionSection = true;
extensionHandler = extensionHandlers.get(qName).get();
} else if (qName.endsWith("Section")) {
inSection = true;
}
}
if (inDisk) {
diskHandler.startElement(uri, localName, qName, attrs);
} else if (inNetwork) {
networkHandler.startElement(uri, localName, qName, attrs);
} else if (inVirtualSystem) {
virtualSystemHandler.startElement(uri, localName, qName, attrs);
} else if (inExtensionSection) {
extensionHandler.startElement(uri, localName, qName, attrs);
} else if (inSection) {
defaultSectionHandler.startElement(uri, localName, qName, attrs);
}
}
@Override
public void endElement(String uri, String localName, String qName) {
depth--;
if (depth == 1) {
if (equalsOrSuffix(qName, "DiskSection")) {
inDisk = false;
builder.diskSection(diskHandler.getResult());
} else if (equalsOrSuffix(qName, "NetworkSection")) {
inNetwork = false;
builder.networkSection(networkHandler.getResult());
} else if (equalsOrSuffix(qName, "VirtualSystemCollection")) {
// http://code.google.com/p/jclouds/issues/detail?id=811
throw new IllegalArgumentException("this handler cannot currently create envelopes with multiple virtual systems");
} else if (equalsOrSuffix(qName, "VirtualSystem")) {
inVirtualSystem = false;
builder.virtualSystem(virtualSystemHandler.getResult());
} else if (extensionHandlers.containsKey(qName)) {
builder.additionalSection(qName, extensionHandler.getResult());
inExtensionSection = false;
} else if (qName.endsWith("Section")) {
builder.additionalSection(qName, defaultSectionHandler.getResult());
inSection = false;
}
}
if (inDisk) {
diskHandler.endElement(uri, localName, qName);
} else if (inNetwork) {
networkHandler.endElement(uri, localName, qName);
} else if (inVirtualSystem) {
virtualSystemHandler.endElement(uri, localName, qName);
} else if (inExtensionSection) {
extensionHandler.endElement(uri, localName, qName);
} else if (inSection) {
defaultSectionHandler.endElement(uri, localName, qName);
}
}
@Override
public void characters(char ch[], int start, int length) {
if (inDisk) {
diskHandler.characters(ch, start, length);
} else if (inNetwork) {
networkHandler.characters(ch, start, length);
} else if (inVirtualSystem) {
virtualSystemHandler.characters(ch, start, length);
} else if (inExtensionSection) {
extensionHandler.characters(ch, start, length);
} else if (inSection) {
defaultSectionHandler.characters(ch, start, length);
}
}
}