2 * Copyright (c) 2016 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.codec.xml;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkState;
12 import static com.google.common.base.Verify.verify;
13 import static java.util.Objects.requireNonNull;
15 import com.google.common.annotations.Beta;
16 import com.google.common.base.Strings;
17 import com.google.common.collect.ImmutableMap;
18 import java.io.Closeable;
19 import java.io.Flushable;
20 import java.io.IOException;
22 import java.net.URISyntaxException;
23 import java.util.AbstractMap.SimpleImmutableEntry;
24 import java.util.Deque;
25 import java.util.HashMap;
26 import java.util.HashSet;
27 import java.util.Iterator;
28 import java.util.LinkedHashMap;
30 import java.util.Map.Entry;
31 import java.util.Optional;
33 import javax.xml.XMLConstants;
34 import javax.xml.namespace.NamespaceContext;
35 import javax.xml.stream.XMLStreamConstants;
36 import javax.xml.stream.XMLStreamException;
37 import javax.xml.stream.XMLStreamReader;
38 import javax.xml.stream.util.StreamReaderDelegate;
39 import javax.xml.transform.TransformerException;
40 import javax.xml.transform.TransformerFactory;
41 import javax.xml.transform.TransformerFactoryConfigurationError;
42 import javax.xml.transform.dom.DOMResult;
43 import javax.xml.transform.dom.DOMSource;
44 import javax.xml.transform.stax.StAXSource;
45 import org.opendaylight.yangtools.odlext.model.api.YangModeledAnyxmlSchemaNode;
46 import org.opendaylight.yangtools.rfc7952.model.api.AnnotationSchemaNode;
47 import org.opendaylight.yangtools.rfc8528.data.api.MountPointContext;
48 import org.opendaylight.yangtools.rfc8528.data.api.MountPointContextFactory;
49 import org.opendaylight.yangtools.rfc8528.data.api.MountPointIdentifier;
50 import org.opendaylight.yangtools.rfc8528.data.api.YangLibraryConstants;
51 import org.opendaylight.yangtools.rfc8528.data.api.YangLibraryConstants.ContainerName;
52 import org.opendaylight.yangtools.rfc8528.model.api.MountPointSchemaNode;
53 import org.opendaylight.yangtools.rfc8528.model.api.SchemaMountConstants;
54 import org.opendaylight.yangtools.yang.common.QName;
55 import org.opendaylight.yangtools.yang.common.QNameModule;
56 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
57 import org.opendaylight.yangtools.yang.data.util.AbstractMountPointDataWithSchema;
58 import org.opendaylight.yangtools.yang.data.util.AbstractNodeDataWithSchema;
59 import org.opendaylight.yangtools.yang.data.util.AnyXmlNodeDataWithSchema;
60 import org.opendaylight.yangtools.yang.data.util.AnydataNodeDataWithSchema;
61 import org.opendaylight.yangtools.yang.data.util.CompositeNodeDataWithSchema;
62 import org.opendaylight.yangtools.yang.data.util.ContainerNodeDataWithSchema;
63 import org.opendaylight.yangtools.yang.data.util.LeafListEntryNodeDataWithSchema;
64 import org.opendaylight.yangtools.yang.data.util.LeafListNodeDataWithSchema;
65 import org.opendaylight.yangtools.yang.data.util.LeafNodeDataWithSchema;
66 import org.opendaylight.yangtools.yang.data.util.ListEntryNodeDataWithSchema;
67 import org.opendaylight.yangtools.yang.data.util.ListNodeDataWithSchema;
68 import org.opendaylight.yangtools.yang.data.util.MountPointData;
69 import org.opendaylight.yangtools.yang.data.util.OperationAsContainer;
70 import org.opendaylight.yangtools.yang.data.util.ParserStreamUtils;
71 import org.opendaylight.yangtools.yang.data.util.SimpleNodeDataWithSchema;
72 import org.opendaylight.yangtools.yang.data.util.YangModeledAnyXmlNodeDataWithSchema;
73 import org.opendaylight.yangtools.yang.model.api.AnydataSchemaNode;
74 import org.opendaylight.yangtools.yang.model.api.AnyxmlSchemaNode;
75 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
76 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
77 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
78 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
79 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
80 import org.opendaylight.yangtools.yang.model.api.Module;
81 import org.opendaylight.yangtools.yang.model.api.OperationDefinition;
82 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
83 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
84 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
85 import org.slf4j.Logger;
86 import org.slf4j.LoggerFactory;
87 import org.w3c.dom.Document;
88 import org.xml.sax.SAXException;
91 * This class provides functionality for parsing an XML source containing YANG-modeled data. It disallows multiple
92 * instances of the same element except for leaf-list and list entries. It also expects that the YANG-modeled data in
93 * the XML source are wrapped in a root element. This class is NOT thread-safe.
96 * Due to backwards compatibility reasons, RFC7952 metadata emitted by this parser may include key QNames with empty URI
97 * (as exposed via {@link #LEGACY_ATTRIBUTE_NAMESPACE}) as their QNameModule. These indicate an unqualified XML
98 * attribute and their value can be assumed to be a String. Furthermore, this extends to qualified attributes, which
99 * uses the proper namespace, but will not bind to a proper module revision -- these need to be reconciled with a
100 * particular SchemaContext and are expected to either be fully decoded, or contain a String value. Handling of such
101 * annotations is at the discretion of the user encountering it: preferred way of handling is to either filter or
102 * normalize them to proper QNames/values when encountered. This caveat will be removed in a future version.
105 public final class XmlParserStream implements Closeable, Flushable {
107 * {@link QNameModule} for use with legacy XML attributes.
108 * @deprecated The use on this namespace is discouraged and users are strongly encouraged to proper RFC7952 metadata
112 public static final QNameModule LEGACY_ATTRIBUTE_NAMESPACE = QNameModule.create(URI.create("")).intern();
114 private static final Logger LOG = LoggerFactory.getLogger(XmlParserStream.class);
115 private static final String XML_STANDARD_VERSION = "1.0";
116 private static final String COM_SUN_TRANSFORMER =
117 "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl";
119 private static final TransformerFactory TRANSFORMER_FACTORY;
122 TransformerFactory fa = TransformerFactory.newInstance();
123 if (!fa.getFeature(StAXSource.FEATURE)) {
124 LOG.warn("Platform-default TransformerFactory {} does not support StAXSource, attempting fallback to {}",
125 fa, COM_SUN_TRANSFORMER);
126 fa = TransformerFactory.newInstance(COM_SUN_TRANSFORMER, null);
127 if (!fa.getFeature(StAXSource.FEATURE)) {
128 throw new TransformerFactoryConfigurationError("No TransformerFactory supporting StAXResult found.");
132 TRANSFORMER_FACTORY = fa;
135 // Cache of nsUri Strings to QNameModules, as resolved in context
136 private final Map<String, Optional<QNameModule>> resolvedNamespaces = new HashMap<>();
137 // Cache of nsUri Strings to QNameModules, as inferred from document
138 private final Map<String, QNameModule> rawNamespaces = new HashMap<>();
139 private final NormalizedNodeStreamWriter writer;
140 private final XmlCodecFactory codecs;
141 private final DataSchemaNode parentNode;
142 private final boolean strictParsing;
144 private XmlParserStream(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
145 final DataSchemaNode parentNode, final boolean strictParsing) {
146 this.writer = requireNonNull(writer);
147 this.codecs = requireNonNull(codecs);
148 this.parentNode = parentNode;
149 this.strictParsing = strictParsing;
153 * Construct a new {@link XmlParserStream} with strict parsing mode switched on.
155 * @param writer Output writer
156 * @param codecs Shared codecs
157 * @param parentNode Parent root node
158 * @return A new stream instance
160 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
161 final SchemaNode parentNode) {
162 return create(writer, codecs, parentNode, true);
166 * Construct a new {@link XmlParserStream}.
168 * @param writer Output writer
169 * @param codecs Shared codecs
170 * @param parentNode Parent root node
171 * @param strictParsing parsing mode
172 * if set to true, the parser will throw an exception if it encounters unknown child nodes
173 * (nodes, that are not defined in the provided SchemaContext) in containers and lists
174 * if set to false, the parser will skip unknown child nodes
175 * @return A new stream instance
177 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
178 final SchemaNode parentNode, final boolean strictParsing) {
179 final DataSchemaNode parent;
180 if (parentNode instanceof DataSchemaNode) {
181 parent = (DataSchemaNode) parentNode;
182 } else if (parentNode instanceof OperationDefinition) {
183 parent = OperationAsContainer.of((OperationDefinition) parentNode);
185 throw new IllegalArgumentException("Illegal parent node " + parentNode);
187 return new XmlParserStream(writer, codecs, parent, strictParsing);
191 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
192 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, SchemaNode)} instead and
193 * maintain a {@link XmlCodecFactory} to match the current {@link SchemaContext}.
195 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final SchemaContext schemaContext,
196 final SchemaNode parentNode) {
197 return create(writer, schemaContext, parentNode, true);
201 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
202 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, SchemaNode)} instead and
203 * maintain a {@link XmlCodecFactory} to match the current {@link SchemaContext}.
205 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final SchemaContext schemaContext,
206 final SchemaNode parentNode, final boolean strictParsing) {
207 return create(writer, XmlCodecFactory.create(schemaContext), parentNode, strictParsing);
211 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
212 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, SchemaNode)} instead and
213 * maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
215 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
216 final SchemaNode parentNode) {
217 return create(writer, mountCtx, parentNode, true);
221 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
222 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, SchemaNode)} instead and
223 * maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
225 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
226 final SchemaNode parentNode, final boolean strictParsing) {
227 return create(writer, XmlCodecFactory.create(mountCtx), parentNode, strictParsing);
231 * This method parses the XML source and emits node events into a NormalizedNodeStreamWriter based on the
232 * YANG-modeled data contained in the XML source.
235 * StAX reader which is to used to walk through the XML source
237 * instance of XmlParserStream
238 * @throws XMLStreamException
239 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
240 * @throws URISyntaxException
241 * if the namespace URI of an XML element contains a syntax error
242 * @throws IOException
243 * if an error occurs while parsing the value of an anyxml node
244 * @throws SAXException
245 * if an error occurs while parsing the value of an anyxml node
247 public XmlParserStream parse(final XMLStreamReader reader) throws XMLStreamException, URISyntaxException,
248 IOException, SAXException {
249 if (reader.hasNext()) {
251 final AbstractNodeDataWithSchema<?> nodeDataWithSchema;
252 if (parentNode instanceof ContainerSchemaNode) {
253 nodeDataWithSchema = new ContainerNodeDataWithSchema((ContainerSchemaNode) parentNode);
254 } else if (parentNode instanceof ListSchemaNode) {
255 nodeDataWithSchema = new ListNodeDataWithSchema((ListSchemaNode) parentNode);
256 } else if (parentNode instanceof YangModeledAnyxmlSchemaNode) {
257 nodeDataWithSchema = new YangModeledAnyXmlNodeDataWithSchema((YangModeledAnyxmlSchemaNode) parentNode);
258 } else if (parentNode instanceof AnyxmlSchemaNode) {
259 nodeDataWithSchema = new AnyXmlNodeDataWithSchema((AnyxmlSchemaNode) parentNode);
260 } else if (parentNode instanceof LeafSchemaNode) {
261 nodeDataWithSchema = new LeafNodeDataWithSchema((LeafSchemaNode) parentNode);
262 } else if (parentNode instanceof LeafListSchemaNode) {
263 nodeDataWithSchema = new LeafListNodeDataWithSchema((LeafListSchemaNode) parentNode);
264 } else if (parentNode instanceof AnydataSchemaNode) {
265 nodeDataWithSchema = new AnydataNodeDataWithSchema((AnydataSchemaNode) parentNode);
267 throw new IllegalStateException("Unsupported schema node type " + parentNode.getClass() + ".");
270 read(reader, nodeDataWithSchema, reader.getLocalName());
271 nodeDataWithSchema.write(writer);
278 * This method traverses a {@link DOMSource} and emits node events into a NormalizedNodeStreamWriter based on the
279 * YANG-modeled data contained in the source.
282 * {@link DOMSource} to be traversed
284 * instance of XmlParserStream
285 * @throws XMLStreamException
286 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
287 * @throws URISyntaxException
288 * if the namespace URI of an XML element contains a syntax error
289 * @throws IOException
290 * if an error occurs while parsing the value of an anyxml node
291 * @throws SAXException
292 * if an error occurs while parsing the value of an anyxml node
295 public XmlParserStream traverse(final DOMSource src) throws XMLStreamException, URISyntaxException, IOException,
297 return parse(new DOMSourceXMLStreamReader(src));
300 private ImmutableMap<QName, Object> getElementAttributes(final XMLStreamReader in) {
301 checkState(in.isStartElement(), "Attributes can be extracted only from START_ELEMENT.");
302 final Map<QName, Object> attributes = new LinkedHashMap<>();
304 for (int attrIndex = 0; attrIndex < in.getAttributeCount(); attrIndex++) {
305 final String attributeNS = in.getAttributeNamespace(attrIndex);
307 // Skip namespace definitions
308 if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(attributeNS)) {
312 final String localName = in.getAttributeLocalName(attrIndex);
313 final String attrValue = in.getAttributeValue(attrIndex);
314 if (Strings.isNullOrEmpty(attributeNS)) {
315 StreamWriterFacade.warnLegacyAttribute(localName);
316 attributes.put(QName.create(LEGACY_ATTRIBUTE_NAMESPACE, localName), attrValue);
320 // Cross-relate attribute namespace to the module
321 final Optional<QNameModule> optModule = resolveXmlNamespace(attributeNS);
322 if (optModule.isPresent()) {
323 final QName qname = QName.create(optModule.get(), localName);
324 final Optional<AnnotationSchemaNode> optAnnotation = AnnotationSchemaNode.find(
325 codecs.getSchemaContext(), qname);
326 if (optAnnotation.isPresent()) {
327 final AnnotationSchemaNode schema = optAnnotation.get();
328 final Object value = codecs.codecFor(schema).parseValue(in.getNamespaceContext(), attrValue);
329 attributes.put(schema.getQName(), value);
333 LOG.debug("Annotation for {} not found, using legacy QName", qname);
336 attributes.put(QName.create(rawXmlNamespace(attributeNS), localName), attrValue);
339 return ImmutableMap.copyOf(attributes);
342 private static Document readAnyXmlValue(final XMLStreamReader in) throws XMLStreamException {
343 // Underlying reader might return null when asked for version, however when such reader is plugged into
344 // Stax -> DOM transformer, it fails with NPE due to null version. Use default xml version in such case.
345 final XMLStreamReader inWrapper;
346 if (in.getVersion() == null) {
347 inWrapper = new StreamReaderDelegate(in) {
349 public String getVersion() {
350 final String ver = super.getVersion();
351 return ver != null ? ver : XML_STANDARD_VERSION;
358 final DOMResult result = new DOMResult();
360 TRANSFORMER_FACTORY.newTransformer().transform(new StAXSource(inWrapper), result);
361 } catch (final TransformerException e) {
362 throw new XMLStreamException("Unable to read anyxml value", e);
364 return (Document) result.getNode();
367 private void read(final XMLStreamReader in, final AbstractNodeDataWithSchema<?> parent, final String rootElement)
368 throws XMLStreamException {
373 if (parent instanceof LeafNodeDataWithSchema || parent instanceof LeafListEntryNodeDataWithSchema) {
374 parent.setAttributes(getElementAttributes(in));
375 setValue((SimpleNodeDataWithSchema<?>) parent, in.getElementText().trim(), in.getNamespaceContext());
376 if (isNextEndDocument(in)) {
380 if (!isAtElement(in)) {
386 if (parent instanceof ListEntryNodeDataWithSchema || parent instanceof ContainerNodeDataWithSchema) {
387 parent.setAttributes(getElementAttributes(in));
390 if (parent instanceof LeafListNodeDataWithSchema || parent instanceof ListNodeDataWithSchema) {
391 String xmlElementName = in.getLocalName();
392 while (xmlElementName.equals(parent.getSchema().getQName().getLocalName())) {
393 read(in, newEntryNode(parent), rootElement);
394 if (in.getEventType() == XMLStreamConstants.END_DOCUMENT
395 || in.getEventType() == XMLStreamConstants.END_ELEMENT) {
398 xmlElementName = in.getLocalName();
404 if (parent instanceof AnyXmlNodeDataWithSchema) {
405 setValue((AnyXmlNodeDataWithSchema) parent, readAnyXmlValue(in), in.getNamespaceContext());
406 if (isNextEndDocument(in)) {
410 if (!isAtElement(in)) {
417 if (parent instanceof AnydataNodeDataWithSchema) {
418 final AnydataNodeDataWithSchema anydata = (AnydataNodeDataWithSchema) parent;
419 anydata.setObjectModel(DOMSourceAnydata.class);
420 anydata.setAttributes(getElementAttributes(in));
421 setValue(anydata, readAnyXmlValue(in), in.getNamespaceContext());
422 if (isNextEndDocument(in)) {
426 if (!isAtElement(in)) {
433 if (parent instanceof YangModeledAnyxmlSchemaNode) {
434 parent.setAttributes(getElementAttributes(in));
437 switch (in.nextTag()) {
438 case XMLStreamConstants.START_ELEMENT:
439 // FIXME: why do we even need this tracker? either document it or remove it
440 final Set<Entry<String, String>> namesakes = new HashSet<>();
441 while (in.hasNext()) {
442 final String xmlElementName = in.getLocalName();
444 DataSchemaNode parentSchema = parent.getSchema();
446 final String parentSchemaName = parentSchema.getQName().getLocalName();
447 if (parentSchemaName.equals(xmlElementName)
448 && in.getEventType() == XMLStreamConstants.END_ELEMENT) {
449 if (isNextEndDocument(in)) {
453 if (!isAtElement(in)) {
459 if (in.isEndElement() && rootElement.equals(xmlElementName)) {
463 if (parentSchema instanceof YangModeledAnyxmlSchemaNode) {
464 parentSchema = ((YangModeledAnyxmlSchemaNode) parentSchema).getSchemaOfAnyXmlData();
467 final String elementNS = in.getNamespaceURI();
468 if (!namesakes.add(new SimpleImmutableEntry<>(elementNS, xmlElementName))) {
469 throw new XMLStreamException(String.format(
470 "Duplicate namespace \"%s\" element \"%s\" in XML input", elementNS, xmlElementName),
476 nsUri = rawXmlNamespace(elementNS).getNamespace();
477 } catch (IllegalArgumentException e) {
478 throw new XMLStreamException("Failed to convert namespace " + xmlElementName, in.getLocation(),
482 final Deque<DataSchemaNode> childDataSchemaNodes =
483 ParserStreamUtils.findSchemaNodeByNameAndNamespace(parentSchema, xmlElementName, nsUri);
484 if (!childDataSchemaNodes.isEmpty()) {
485 // We have a match, proceed with it
486 read(in, ((CompositeNodeDataWithSchema<?>) parent).addChild(childDataSchemaNodes), rootElement);
490 if (parent instanceof AbstractMountPointDataWithSchema) {
491 // Parent can potentially hold a mount point, let's see if there is a label present
492 final Optional<MountPointSchemaNode> optMount;
493 if (parentSchema instanceof ContainerSchemaNode) {
494 optMount = MountPointSchemaNode.streamAll((ContainerSchemaNode) parentSchema).findFirst();
495 } else if (parentSchema instanceof ListSchemaNode) {
496 optMount = MountPointSchemaNode.streamAll((ListSchemaNode) parentSchema).findFirst();
498 throw new XMLStreamException("Unhandled mount-aware schema " + parentSchema);
501 if (optMount.isPresent()) {
502 final MountPointIdentifier mountId = MountPointIdentifier.of(optMount.get().getQName());
503 LOG.debug("Assuming node {} and namespace {} belongs to mount point {}", xmlElementName,
506 final Optional<MountPointContextFactory> optFactory = codecs.mountPointContext()
507 .findMountPoint(mountId);
508 if (optFactory.isPresent()) {
509 final MountPointData mountData = ((AbstractMountPointDataWithSchema<?>) parent)
510 .getMountPointData(mountId, optFactory.get());
511 addMountPointChild(mountData, nsUri, xmlElementName,
512 new DOMSource(readAnyXmlValue(in).getDocumentElement()));
516 LOG.debug("Mount point {} not attached", mountId);
520 // We have not handled the node -- let's decide what to do about that
522 throw new XMLStreamException(String.format(
523 "Schema for node with name %s and namespace %s does not exist at %s", xmlElementName,
524 elementNS, parentSchema.getPath(), in.getLocation()));
527 LOG.debug("Skipping unknown node ns=\"{}\" localName=\"{}\" at path {}", elementNS, xmlElementName,
528 parentSchema.getPath());
532 case XMLStreamConstants.END_ELEMENT:
533 if (isNextEndDocument(in)) {
537 if (!isAtElement(in)) {
546 private static void addMountPointChild(final MountPointData mount, final URI namespace, final String localName,
547 final DOMSource source) {
548 final DOMSourceMountPointChild child = new DOMSourceMountPointChild(source);
549 if (YangLibraryConstants.MODULE_NAMESPACE.equals(namespace)) {
550 final Optional<ContainerName> optName = ContainerName.forLocalName(localName);
551 if (optName.isPresent()) {
552 mount.setContainer(optName.get(), child);
556 LOG.warn("Encountered unknown element {} from YANG Library namespace", localName);
557 } else if (SchemaMountConstants.RFC8528_MODULE.getNamespace().equals(namespace)) {
558 mount.setSchemaMounts(child);
562 mount.addChild(child);
565 private static boolean isNextEndDocument(final XMLStreamReader in) throws XMLStreamException {
566 return !in.hasNext() || in.next() == XMLStreamConstants.END_DOCUMENT;
569 private static boolean isAtElement(final XMLStreamReader in) {
570 return in.getEventType() == XMLStreamConstants.START_ELEMENT
571 || in.getEventType() == XMLStreamConstants.END_ELEMENT;
574 private static void skipUnknownNode(final XMLStreamReader in) throws XMLStreamException {
575 // in case when the unknown node and at least one of its descendant nodes have the same name
576 // we cannot properly reach the end just by checking if the current node is an end element and has the same name
577 // as the root unknown element. therefore we ignore the names completely and just track the level of nesting
578 int levelOfNesting = 0;
579 while (in.hasNext()) {
580 // in case there are text characters in an element, we cannot skip them by calling nextTag()
581 // therefore we skip them by calling next(), and then proceed to next element
583 if (!isAtElement(in)) {
586 if (in.isStartElement()) {
590 if (in.isEndElement()) {
591 if (levelOfNesting == 0) {
602 private void setValue(final SimpleNodeDataWithSchema<?> parent, final Object value,
603 final NamespaceContext nsContext) {
604 final DataSchemaNode schema = parent.getSchema();
605 final Object prev = parent.getValue();
606 checkArgument(prev == null, "Node '%s' has already set its value to '%s'", schema.getQName(), prev);
607 parent.setValue(translateValueByType(value, schema, nsContext));
610 private Object translateValueByType(final Object value, final DataSchemaNode node,
611 final NamespaceContext namespaceCtx) {
612 if (node instanceof AnyxmlSchemaNode) {
613 checkArgument(value instanceof Document);
615 * FIXME: Figure out some YANG extension dispatch, which will reuse JSON parsing or XML parsing -
616 * anyxml is not well-defined in JSON.
618 return new DOMSource(((Document) value).getDocumentElement());
620 if (node instanceof AnydataSchemaNode) {
621 checkArgument(value instanceof Document);
622 return new DOMSourceAnydata(new DOMSource(((Document) value).getDocumentElement()));
625 checkArgument(node instanceof TypedDataSchemaNode);
626 checkArgument(value instanceof String);
627 return codecs.codecFor((TypedDataSchemaNode) node).parseValue(namespaceCtx, (String) value);
630 private static AbstractNodeDataWithSchema<?> newEntryNode(final AbstractNodeDataWithSchema<?> parent) {
631 final AbstractNodeDataWithSchema<?> newChild;
632 if (parent instanceof ListNodeDataWithSchema) {
633 newChild = ListEntryNodeDataWithSchema.forSchema(((ListNodeDataWithSchema) parent).getSchema());
635 verify(parent instanceof LeafListNodeDataWithSchema, "Unexpected parent %s", parent);
636 newChild = new LeafListEntryNodeDataWithSchema(((LeafListNodeDataWithSchema) parent).getSchema());
638 ((CompositeNodeDataWithSchema<?>) parent).addChild(newChild);
643 public void close() throws IOException {
649 public void flush() throws IOException {
653 private Optional<QNameModule> resolveXmlNamespace(final String xmlNamespace) {
654 return resolvedNamespaces.computeIfAbsent(xmlNamespace, nsUri -> {
655 final Iterator<Module> it = codecs.getSchemaContext().findModules(URI.create(nsUri)).iterator();
656 return it.hasNext() ? Optional.of(it.next().getQNameModule()) : Optional.empty();
660 private QNameModule rawXmlNamespace(final String xmlNamespace) {
661 return rawNamespaces.computeIfAbsent(xmlNamespace, nsUri -> QNameModule.create(URI.create(nsUri)));