2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.data.impl.codec.xml;
10 import static com.google.common.base.Preconditions.checkState;
12 import com.google.common.base.Function;
13 import com.google.common.base.Objects;
14 import com.google.common.base.Optional;
15 import com.google.common.base.Preconditions;
16 import com.google.common.base.Strings;
17 import com.google.common.collect.ImmutableList;
20 import java.util.ArrayList;
21 import java.util.List;
23 import java.util.Map.Entry;
26 import javax.activation.UnsupportedDataTypeException;
27 import javax.xml.parsers.DocumentBuilder;
28 import javax.xml.parsers.DocumentBuilderFactory;
29 import javax.xml.parsers.ParserConfigurationException;
30 import javax.xml.stream.XMLOutputFactory;
31 import javax.xml.stream.XMLStreamException;
32 import javax.xml.stream.XMLStreamWriter;
33 import javax.xml.transform.dom.DOMResult;
35 import org.opendaylight.yangtools.yang.common.QName;
36 import org.opendaylight.yangtools.yang.data.api.AttributesContainer;
37 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
38 import org.opendaylight.yangtools.yang.data.api.ModifyAction;
39 import org.opendaylight.yangtools.yang.data.api.Node;
40 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
41 import org.opendaylight.yangtools.yang.data.impl.ImmutableCompositeNode;
42 import org.opendaylight.yangtools.yang.data.impl.SimpleNodeTOImpl;
43 import org.opendaylight.yangtools.yang.data.impl.codec.TypeDefinitionAwareCodec;
44 import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
45 import org.opendaylight.yangtools.yang.model.api.ChoiceNode;
46 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
47 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
48 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
49 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
50 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
51 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
52 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
53 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
54 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
55 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
56 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
57 import org.slf4j.Logger;
58 import org.slf4j.LoggerFactory;
59 import org.w3c.dom.Attr;
60 import org.w3c.dom.Document;
61 import org.w3c.dom.Element;
62 import org.w3c.dom.NodeList;
64 public class XmlDocumentUtils {
65 private static class ElementWithSchemaContext {
67 SchemaContext schemaContext;
69 ElementWithSchemaContext(final Element element,final SchemaContext schemaContext) {
70 this.schemaContext = schemaContext;
71 this.element = element;
74 Element getElement() {
78 SchemaContext getSchemaContext() {
83 public static final QName OPERATION_ATTRIBUTE_QNAME = QName.create(URI.create("urn:ietf:params:xml:ns:netconf:base:1.0"), null, "operation");
84 private static final Logger logger = LoggerFactory.getLogger(XmlDocumentUtils.class);
85 private static final XMLOutputFactory FACTORY = XMLOutputFactory.newFactory();
88 * Converts Data DOM structure to XML Document for specified XML Codec Provider and corresponding
89 * Data Node Container schema. The CompositeNode data parameter enters as root of Data DOM tree and will
90 * be transformed to root in XML Document. Each element of Data DOM tree is compared against specified Data
91 * Node Container Schema and transformed accordingly.
93 * @param data Data DOM root element
94 * @param schema Data Node Container Schema
95 * @param codecProvider XML Codec Provider
96 * @return new instance of XML Document
97 * @throws UnsupportedDataTypeException
99 public static Document toDocument(final CompositeNode data, final DataNodeContainer schema, final XmlCodecProvider codecProvider)
100 throws UnsupportedDataTypeException {
101 Preconditions.checkNotNull(data);
102 Preconditions.checkNotNull(schema);
104 if (!(schema instanceof ContainerSchemaNode || schema instanceof ListSchemaNode)) {
105 throw new UnsupportedDataTypeException("Schema can be ContainerSchemaNode or ListSchemaNode. Other types are not supported yet.");
108 final DOMResult result = new DOMResult(getDocument());
110 final XMLStreamWriter writer = FACTORY.createXMLStreamWriter(result);
111 XmlStreamUtils.create(codecProvider).writeDocument(writer, data, (SchemaNode)schema);
113 return (Document)result.getNode();
114 } catch (XMLStreamException e) {
115 logger.error("Failed to serialize data {}", data, e);
120 public static Document getDocument() {
121 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
124 DocumentBuilder bob = dbf.newDocumentBuilder();
125 doc = bob.newDocument();
126 } catch (ParserConfigurationException e) {
127 throw new RuntimeException(e);
133 * Converts Data DOM structure to XML Document for specified XML Codec Provider. The CompositeNode
134 * data parameter enters as root of Data DOM tree and will be transformed to root in XML Document. The child
135 * nodes of Data Tree are transformed accordingly.
137 * @param data Data DOM root element
138 * @param codecProvider XML Codec Provider
139 * @return new instance of XML Document
140 * @throws UnsupportedDataTypeException
142 public static Document toDocument(final CompositeNode data, final XmlCodecProvider codecProvider) {
143 final DOMResult result = new DOMResult(getDocument());
145 final XMLStreamWriter writer = FACTORY.createXMLStreamWriter(result);
146 XmlStreamUtils.create(codecProvider).writeDocument(writer, data);
148 return (Document)result.getNode();
149 } catch (XMLStreamException e) {
150 logger.error("Failed to serialize data {}", data, e);
155 private static final Element createElementFor(final Document doc, final QName qname, final Object obj) {
157 if (qname.getNamespace() != null) {
158 ret = doc.createElementNS(qname.getNamespace().toString(), qname.getLocalName());
160 ret = doc.createElementNS(null, qname.getLocalName());
163 if (obj instanceof AttributesContainer) {
164 final Map<QName, String> attrs = ((AttributesContainer)obj).getAttributes();
167 for (Entry<QName, String> attribute : attrs.entrySet()) {
168 ret.setAttributeNS(attribute.getKey().getNamespace().toString(), attribute.getKey().getLocalName(),
169 attribute.getValue());
177 public static Element createElementFor(final Document doc, final Node<?> data) {
178 return createElementFor(doc, data.getNodeType(), data);
181 public static Element createElementFor(final Document doc, final NormalizedNode<?, ?> data) {
182 return createElementFor(doc, data.getNodeType(), data);
185 public static Node<?> toDomNode(final Element xmlElement, final Optional<DataSchemaNode> schema,
186 final Optional<XmlCodecProvider> codecProvider) {
187 return toDomNode(xmlElement, schema, codecProvider, Optional.<SchemaContext>absent());
190 public static Node<?> toDomNode(final Element xmlElement, final Optional<DataSchemaNode> schema,
191 final Optional<XmlCodecProvider> codecProvider, final Optional<SchemaContext> schemaContext) {
192 if (schema.isPresent()) {
193 if(schemaContext.isPresent()) {
194 return toNodeWithSchema(xmlElement, schema.get(), codecProvider.or(XmlUtils.DEFAULT_XML_CODEC_PROVIDER), schemaContext.get());
196 return toNodeWithSchema(xmlElement, schema.get(), codecProvider.or(XmlUtils.DEFAULT_XML_CODEC_PROVIDER));
199 return toDomNode(xmlElement);
202 public static QName qNameFromElement(final Element xmlElement) {
203 String namespace = xmlElement.getNamespaceURI();
204 String localName = xmlElement.getLocalName();
205 return QName.create(namespace != null ? URI.create(namespace) : null, null, localName);
208 private static Node<?> toNodeWithSchema(final Element xmlElement, final DataSchemaNode schema, final XmlCodecProvider codecProvider,final SchemaContext schemaCtx) {
209 checkQName(xmlElement, schema.getQName());
210 if (schema instanceof DataNodeContainer) {
211 return toCompositeNodeWithSchema(xmlElement, schema.getQName(), (DataNodeContainer) schema, codecProvider,schemaCtx);
212 } else if (schema instanceof LeafSchemaNode) {
213 return toSimpleNodeWithType(xmlElement, (LeafSchemaNode) schema, codecProvider,schemaCtx);
214 } else if (schema instanceof LeafListSchemaNode) {
215 return toSimpleNodeWithType(xmlElement, (LeafListSchemaNode) schema, codecProvider,schemaCtx);
220 private static Node<?> toNodeWithSchema(final Element xmlElement, final DataSchemaNode schema, final XmlCodecProvider codecProvider) {
221 return toNodeWithSchema(xmlElement, schema, codecProvider, null);
224 protected static Node<?> toSimpleNodeWithType(final Element xmlElement, final LeafSchemaNode schema,
225 final XmlCodecProvider codecProvider,final SchemaContext schemaCtx) {
226 TypeDefinitionAwareCodec<? extends Object, ? extends TypeDefinition<?>> codec = codecProvider.codecFor(schema.getType());
227 String text = xmlElement.getTextContent();
230 value = codec.deserialize(text);
232 final TypeDefinition<?> baseType = XmlUtils.resolveBaseTypeFrom(schema.getType());
234 if (baseType instanceof org.opendaylight.yangtools.yang.model.util.InstanceIdentifier) {
235 value = InstanceIdentifierForXmlCodec.deserialize(xmlElement,schemaCtx);
236 } else if(baseType instanceof IdentityrefTypeDefinition){
237 value = InstanceIdentifierForXmlCodec.toIdentity(xmlElement.getTextContent(), xmlElement, schemaCtx);
241 value = xmlElement.getTextContent();
244 Optional<ModifyAction> modifyAction = getModifyOperationFromAttributes(xmlElement);
245 return new SimpleNodeTOImpl<>(schema.getQName(), null, value, modifyAction.orNull());
248 private static Node<?> toSimpleNodeWithType(final Element xmlElement, final LeafListSchemaNode schema,
249 final XmlCodecProvider codecProvider,final SchemaContext schemaCtx) {
250 TypeDefinitionAwareCodec<? extends Object, ? extends TypeDefinition<?>> codec = codecProvider.codecFor(schema.getType());
251 String text = xmlElement.getTextContent();
254 value = codec.deserialize(text);
256 if (schema.getType() instanceof org.opendaylight.yangtools.yang.model.util.InstanceIdentifier) {
257 value = InstanceIdentifierForXmlCodec.deserialize(xmlElement,schemaCtx);
260 value = xmlElement.getTextContent();
263 Optional<ModifyAction> modifyAction = getModifyOperationFromAttributes(xmlElement);
264 return new SimpleNodeTOImpl<>(schema.getQName(), null, value, modifyAction.orNull());
267 private static Node<?> toCompositeNodeWithSchema(final Element xmlElement, final QName qName, final DataNodeContainer schema,
268 final XmlCodecProvider codecProvider,final SchemaContext schemaCtx) {
269 List<Node<?>> values = toDomNodes(xmlElement, Optional.fromNullable(schema.getChildNodes()),schemaCtx);
270 Optional<ModifyAction> modifyAction = getModifyOperationFromAttributes(xmlElement);
271 return ImmutableCompositeNode.create(qName, values, modifyAction.orNull());
274 public static Optional<ModifyAction> getModifyOperationFromAttributes(final Element xmlElement) {
275 Attr attributeNodeNS = xmlElement.getAttributeNodeNS(OPERATION_ATTRIBUTE_QNAME.getNamespace().toString(), OPERATION_ATTRIBUTE_QNAME.getLocalName());
276 if(attributeNodeNS == null) {
277 return Optional.absent();
280 ModifyAction action = ModifyAction.fromXmlValue(attributeNodeNS.getValue());
281 Preconditions.checkArgument(action.isOnElementPermitted(), "Unexpected operation %s on %s", action, xmlElement);
283 return Optional.of(action);
286 private static void checkQName(final Element xmlElement, final QName qName) {
287 checkState(Objects.equal(xmlElement.getNamespaceURI(), qName.getNamespace().toString()), "Not equal: %s to: %s for: %s and: %s", qName.getNamespace(), xmlElement.getNamespaceURI(), qName, xmlElement);
288 checkState(qName.getLocalName().equals(xmlElement.getLocalName()), "Not equal: %s to: %s for: %s and: %s", qName.getLocalName(), xmlElement.getLocalName(), qName, xmlElement);
291 public static final Optional<DataSchemaNode> findFirstSchema(final QName qname, final Iterable<DataSchemaNode> dataSchemaNode) {
292 if (dataSchemaNode != null && qname != null) {
293 for (DataSchemaNode dsn : dataSchemaNode) {
294 if (qname.isEqualWithoutRevision(dsn.getQName())) {
295 return Optional.<DataSchemaNode> of(dsn);
296 } else if (dsn instanceof ChoiceNode) {
297 for (ChoiceCaseNode choiceCase : ((ChoiceNode) dsn).getCases()) {
298 Optional<DataSchemaNode> foundDsn = findFirstSchema(qname, choiceCase.getChildNodes());
299 if (foundDsn != null && foundDsn.isPresent()) {
306 return Optional.absent();
309 public static Node<?> toDomNode(final Document doc) {
310 return toDomNode(doc.getDocumentElement());
313 private static Node<?> toDomNode(final Element element) {
314 QName qname = qNameFromElement(element);
316 ImmutableList.Builder<Node<?>> values = ImmutableList.<Node<?>> builder();
317 NodeList nodes = element.getChildNodes();
318 boolean isSimpleObject = true;
320 for (int i = 0; i < nodes.getLength(); i++) {
321 org.w3c.dom.Node child = nodes.item(i);
322 if (child instanceof Element) {
323 isSimpleObject = false;
324 values.add(toDomNode((Element) child));
326 if (isSimpleObject && child instanceof org.w3c.dom.Text) {
327 value = element.getTextContent();
328 if (!Strings.isNullOrEmpty(value)) {
329 isSimpleObject = true;
333 if (isSimpleObject) {
334 return new SimpleNodeTOImpl<>(qname, null, value);
336 return ImmutableCompositeNode.create(qname, values.build());
339 public static List<Node<?>> toDomNodes(final Element element, final Optional<? extends Iterable<DataSchemaNode>> context, final SchemaContext schemaCtx) {
340 return forEachChild(element.getChildNodes(),schemaCtx, new Function<ElementWithSchemaContext, Optional<Node<?>>>() {
343 public Optional<Node<?>> apply(final ElementWithSchemaContext input) {
344 if (context.isPresent()) {
345 QName partialQName = qNameFromElement(input.getElement());
346 Optional<DataSchemaNode> schemaNode = findFirstSchema(partialQName, context.get());
347 if (schemaNode.isPresent()) {
348 return Optional.<Node<?>> fromNullable(
349 toNodeWithSchema(input.getElement(), schemaNode.get(), XmlUtils.DEFAULT_XML_CODEC_PROVIDER, input.getSchemaContext()));
352 return Optional.<Node<?>> fromNullable(toDomNode(input.getElement()));
359 public static List<Node<?>> toDomNodes(final Element element, final Optional<? extends Iterable<DataSchemaNode>> context) {
360 return toDomNodes(element, context, null);
364 * Converts XML Document containing notification data from Netconf device to
365 * Data DOM Nodes. <br>
366 * By specification defined in <a
367 * href="http://tools.ietf.org/search/rfc6020#section-7.14">RFC 6020</a>
368 * there are xml elements containing notifications metadata, like eventTime
369 * or root notification element which specifies namespace for which is
370 * notification defined in yang model. Those elements MUST be stripped off
371 * notifications body. This method returns pure notification body which
372 * begins in element which is equal to notifications name defined in
373 * corresponding yang model. Rest of notification metadata are obfuscated,
374 * thus Data DOM contains only pure notification body.
377 * XML Document containing notification body
378 * @param notifications
379 * Notifications Definition Schema
380 * @return Data DOM Nodes containing xml notification body definition or
381 * <code>null</code> if there is no NotificationDefinition with
382 * Element with equal notification QName defined in XML Document.
384 public static CompositeNode notificationToDomNodes(final Document document,
385 final Optional<Set<NotificationDefinition>> notifications, final SchemaContext schemaCtx) {
386 if (notifications.isPresent() && (document != null) && (document.getDocumentElement() != null)) {
387 final NodeList originChildNodes = document.getDocumentElement().getChildNodes();
388 for (int i = 0; i < originChildNodes.getLength(); i++) {
389 org.w3c.dom.Node child = originChildNodes.item(i);
390 if (child instanceof Element) {
391 final Element childElement = (Element) child;
392 final QName partialQName = qNameFromElement(childElement);
393 final Optional<NotificationDefinition> notificationDef = findNotification(partialQName,
394 notifications.get());
395 if (notificationDef.isPresent()) {
396 final Iterable<DataSchemaNode> dataNodes = notificationDef.get().getChildNodes();
397 final List<Node<?>> domNodes = toDomNodes(childElement,
398 Optional.<Iterable<DataSchemaNode>> fromNullable(dataNodes),schemaCtx);
399 return ImmutableCompositeNode.create(notificationDef.get().getQName(), domNodes);
407 public static CompositeNode notificationToDomNodes(final Document document,
408 final Optional<Set<NotificationDefinition>> notifications) {
409 return notificationToDomNodes(document, notifications,null);
412 private static Optional<NotificationDefinition> findNotification(final QName notifName,
413 final Set<NotificationDefinition> notifications) {
414 if ((notifName != null) && (notifications != null)) {
415 for (final NotificationDefinition notification : notifications) {
416 if ((notification != null) && notifName.isEqualWithoutRevision(notification.getQName())) {
417 return Optional.<NotificationDefinition>fromNullable(notification);
421 return Optional.<NotificationDefinition>absent();
424 private static final <T> List<T> forEachChild(final NodeList nodes, final SchemaContext schemaContext, final Function<ElementWithSchemaContext, Optional<T>> forBody) {
425 final int l = nodes.getLength();
427 return ImmutableList.of();
430 final List<T> list = new ArrayList<>(l);
431 for (int i = 0; i < l; i++) {
432 org.w3c.dom.Node child = nodes.item(i);
433 if (child instanceof Element) {
434 Optional<T> result = forBody.apply(new ElementWithSchemaContext((Element) child,schemaContext));
435 if (result.isPresent()) {
436 list.add(result.get());
440 return ImmutableList.copyOf(list);
443 public static final XmlCodecProvider defaultValueCodecProvider() {
444 return XmlUtils.DEFAULT_XML_CODEC_PROVIDER;