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;
21 import java.net.URISyntaxException;
22 import java.util.AbstractMap.SimpleImmutableEntry;
23 import java.util.Deque;
24 import java.util.HashMap;
25 import java.util.HashSet;
26 import java.util.Iterator;
27 import java.util.LinkedHashMap;
29 import java.util.Map.Entry;
30 import java.util.Optional;
32 import javax.xml.XMLConstants;
33 import javax.xml.namespace.NamespaceContext;
34 import javax.xml.stream.XMLStreamConstants;
35 import javax.xml.stream.XMLStreamException;
36 import javax.xml.stream.XMLStreamReader;
37 import javax.xml.stream.util.StreamReaderDelegate;
38 import javax.xml.transform.TransformerException;
39 import javax.xml.transform.TransformerFactory;
40 import javax.xml.transform.TransformerFactoryConfigurationError;
41 import javax.xml.transform.dom.DOMResult;
42 import javax.xml.transform.dom.DOMSource;
43 import javax.xml.transform.stax.StAXSource;
44 import org.opendaylight.yangtools.rfc7952.model.api.AnnotationSchemaNode;
45 import org.opendaylight.yangtools.rfc8528.data.api.MountPointContext;
46 import org.opendaylight.yangtools.rfc8528.data.api.MountPointContextFactory;
47 import org.opendaylight.yangtools.rfc8528.data.api.MountPointIdentifier;
48 import org.opendaylight.yangtools.rfc8528.data.api.YangLibraryConstants;
49 import org.opendaylight.yangtools.rfc8528.data.api.YangLibraryConstants.ContainerName;
50 import org.opendaylight.yangtools.rfc8528.model.api.MountPointSchemaNode;
51 import org.opendaylight.yangtools.rfc8528.model.api.SchemaMountConstants;
52 import org.opendaylight.yangtools.yang.common.QName;
53 import org.opendaylight.yangtools.yang.common.QNameModule;
54 import org.opendaylight.yangtools.yang.common.XMLNamespace;
55 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
56 import org.opendaylight.yangtools.yang.data.util.AbstractMountPointDataWithSchema;
57 import org.opendaylight.yangtools.yang.data.util.AbstractNodeDataWithSchema;
58 import org.opendaylight.yangtools.yang.data.util.AnyXmlNodeDataWithSchema;
59 import org.opendaylight.yangtools.yang.data.util.AnydataNodeDataWithSchema;
60 import org.opendaylight.yangtools.yang.data.util.CompositeNodeDataWithSchema;
61 import org.opendaylight.yangtools.yang.data.util.CompositeNodeDataWithSchema.ChildReusePolicy;
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.MultipleEntryDataWithSchema;
70 import org.opendaylight.yangtools.yang.data.util.NotificationAsContainer;
71 import org.opendaylight.yangtools.yang.data.util.OperationAsContainer;
72 import org.opendaylight.yangtools.yang.data.util.ParserStreamUtils;
73 import org.opendaylight.yangtools.yang.data.util.SimpleNodeDataWithSchema;
74 import org.opendaylight.yangtools.yang.model.api.AnydataSchemaNode;
75 import org.opendaylight.yangtools.yang.model.api.AnyxmlSchemaNode;
76 import org.opendaylight.yangtools.yang.model.api.ContainerLike;
77 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
78 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
79 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
80 import org.opendaylight.yangtools.yang.model.api.EffectiveStatementInference;
81 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
82 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
83 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
84 import org.opendaylight.yangtools.yang.model.api.Module;
85 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
86 import org.opendaylight.yangtools.yang.model.api.OperationDefinition;
87 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
88 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
89 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
90 import org.slf4j.Logger;
91 import org.slf4j.LoggerFactory;
92 import org.w3c.dom.Document;
93 import org.xml.sax.SAXException;
96 * This class provides functionality for parsing an XML source containing YANG-modeled data. It disallows multiple
97 * instances of the same element except for leaf-list and list entries. It also expects that the YANG-modeled data in
98 * the XML source are wrapped in a root element. This class is NOT thread-safe.
101 * Due to backwards compatibility reasons, RFC7952 metadata emitted by this parser may include key QNames with empty URI
102 * (as exposed via {@link #LEGACY_ATTRIBUTE_NAMESPACE}) as their QNameModule. These indicate an unqualified XML
103 * attribute and their value can be assumed to be a String. Furthermore, this extends to qualified attributes, which
104 * uses the proper namespace, but will not bind to a proper module revision -- these need to be reconciled with a
105 * particular SchemaContext and are expected to either be fully decoded, or contain a String value. Handling of such
106 * annotations is at the discretion of the user encountering it: preferred way of handling is to either filter or
107 * normalize them to proper QNames/values when encountered. This caveat will be removed in a future version.
110 public final class XmlParserStream implements Closeable, Flushable {
112 * {@link QNameModule} for use with legacy XML attributes.
113 * @deprecated The use on this namespace is discouraged and users are strongly encouraged to proper RFC7952 metadata
117 public static final QNameModule LEGACY_ATTRIBUTE_NAMESPACE = QNameModule.create(XMLNamespace.of("")).intern();
119 private static final Logger LOG = LoggerFactory.getLogger(XmlParserStream.class);
120 private static final String XML_STANDARD_VERSION = "1.0";
121 private static final String COM_SUN_TRANSFORMER =
122 "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl";
124 private static final TransformerFactory TRANSFORMER_FACTORY;
127 TransformerFactory fa = TransformerFactory.newInstance();
128 if (!fa.getFeature(StAXSource.FEATURE)) {
129 LOG.warn("Platform-default TransformerFactory {} does not support StAXSource, attempting fallback to {}",
130 fa, COM_SUN_TRANSFORMER);
131 fa = TransformerFactory.newInstance(COM_SUN_TRANSFORMER, null);
132 if (!fa.getFeature(StAXSource.FEATURE)) {
133 throw new TransformerFactoryConfigurationError("No TransformerFactory supporting StAXResult found.");
137 TRANSFORMER_FACTORY = fa;
140 // Cache of nsUri Strings to QNameModules, as resolved in context
141 private final Map<String, Optional<QNameModule>> resolvedNamespaces = new HashMap<>();
142 // Cache of nsUri Strings to QNameModules, as inferred from document
143 private final Map<String, QNameModule> rawNamespaces = new HashMap<>();
144 private final NormalizedNodeStreamWriter writer;
145 private final SchemaInferenceStack stack;
146 private final XmlCodecFactory codecs;
147 private final DataSchemaNode parentNode;
148 private final boolean strictParsing;
150 private XmlParserStream(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
151 final SchemaInferenceStack stack, final boolean strictParsing) {
152 this.writer = requireNonNull(writer);
153 this.codecs = requireNonNull(codecs);
154 this.stack = requireNonNull(stack);
155 this.strictParsing = strictParsing;
157 if (!stack.isEmpty()) {
158 final EffectiveStatement<?, ?> stmt = stack.currentStatement();
159 if (stmt instanceof DataSchemaNode) {
160 parentNode = (DataSchemaNode) stmt;
161 } else if (stmt instanceof OperationDefinition) {
162 parentNode = OperationAsContainer.of((OperationDefinition) stmt);
163 } else if (stmt instanceof NotificationDefinition) {
164 parentNode = NotificationAsContainer.of((NotificationDefinition) stmt);
166 throw new IllegalArgumentException("Illegal parent node " + stmt);
169 parentNode = stack.getEffectiveModelContext();
174 * Construct a new {@link XmlParserStream} with strict parsing mode switched on.
176 * @param writer Output writer
177 * @param codecs Shared codecs
178 * @param parentNode Parent root node
179 * @return A new stream instance
181 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
182 final EffectiveStatementInference parentNode) {
183 return create(writer, codecs, parentNode, true);
187 * Construct a new {@link XmlParserStream}.
189 * @param writer Output writer
190 * @param codecs Shared codecs
191 * @param parentNode Parent root node
192 * @param strictParsing parsing mode
193 * if set to true, the parser will throw an exception if it encounters unknown child nodes
194 * (nodes, that are not defined in the provided SchemaContext) in containers and lists
195 * if set to false, the parser will skip unknown child nodes
196 * @return A new stream instance
198 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
199 final EffectiveStatementInference parentNode, final boolean strictParsing) {
200 return new XmlParserStream(writer, codecs, SchemaInferenceStack.ofInference(parentNode), strictParsing);
204 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
205 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
206 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
208 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
209 final EffectiveModelContext context) {
210 return create(writer, context, true);
214 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
215 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
216 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
218 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
219 final EffectiveModelContext context, final boolean strictParsing) {
220 return create(writer, SchemaInferenceStack.of(context).toInference(), strictParsing);
224 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
225 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
226 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
228 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
229 final EffectiveStatementInference parentNode) {
230 return create(writer, parentNode, true);
234 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
235 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
236 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
238 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
239 final EffectiveStatementInference parentNode, final boolean strictParsing) {
240 return create(writer, XmlCodecFactory.create(parentNode.getEffectiveModelContext()), parentNode, strictParsing);
244 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
245 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
246 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
248 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx) {
249 return create(writer, mountCtx, SchemaInferenceStack.of(mountCtx.getEffectiveModelContext()).toInference(),
254 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
255 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
256 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
258 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
259 final EffectiveStatementInference parentNode) {
260 return create(writer, mountCtx, parentNode, true);
264 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
265 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
266 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
268 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
269 final EffectiveStatementInference parentNode, final boolean strictParsing) {
270 return create(writer, XmlCodecFactory.create(mountCtx), parentNode, strictParsing);
274 * This method parses the XML source and emits node events into a NormalizedNodeStreamWriter based on the
275 * YANG-modeled data contained in the XML source.
278 * StAX reader which is to used to walk through the XML source
280 * instance of XmlParserStream
281 * @throws XMLStreamException
282 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
283 * @throws URISyntaxException
284 * if the namespace URI of an XML element contains a syntax error
285 * @throws IOException
286 * if an error occurs while parsing the value of an anyxml node
287 * @throws SAXException
288 * if an error occurs while parsing the value of an anyxml node
290 public XmlParserStream parse(final XMLStreamReader reader) throws XMLStreamException, URISyntaxException,
291 IOException, SAXException {
292 if (reader.hasNext()) {
294 final AbstractNodeDataWithSchema<?> nodeDataWithSchema;
295 if (parentNode instanceof ContainerLike) {
296 nodeDataWithSchema = new ContainerNodeDataWithSchema((ContainerLike) parentNode);
297 } else if (parentNode instanceof ListSchemaNode) {
298 nodeDataWithSchema = new ListNodeDataWithSchema((ListSchemaNode) parentNode);
299 } else if (parentNode instanceof AnyxmlSchemaNode) {
300 nodeDataWithSchema = new AnyXmlNodeDataWithSchema((AnyxmlSchemaNode) parentNode);
301 } else if (parentNode instanceof LeafSchemaNode) {
302 nodeDataWithSchema = new LeafNodeDataWithSchema((LeafSchemaNode) parentNode);
303 } else if (parentNode instanceof LeafListSchemaNode) {
304 nodeDataWithSchema = new LeafListNodeDataWithSchema((LeafListSchemaNode) parentNode);
305 } else if (parentNode instanceof AnydataSchemaNode) {
306 nodeDataWithSchema = new AnydataNodeDataWithSchema((AnydataSchemaNode) parentNode);
308 throw new IllegalStateException("Unsupported schema node type " + parentNode.getClass() + ".");
311 read(reader, nodeDataWithSchema, reader.getLocalName());
312 nodeDataWithSchema.write(writer);
319 * This method traverses a {@link DOMSource} and emits node events into a NormalizedNodeStreamWriter based on the
320 * YANG-modeled data contained in the source.
323 * {@link DOMSource} to be traversed
325 * instance of XmlParserStream
326 * @throws XMLStreamException
327 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
328 * @throws URISyntaxException
329 * if the namespace URI of an XML element contains a syntax error
330 * @throws IOException
331 * if an error occurs while parsing the value of an anyxml node
332 * @throws SAXException
333 * if an error occurs while parsing the value of an anyxml node
336 public XmlParserStream traverse(final DOMSource src) throws XMLStreamException, URISyntaxException, IOException,
338 return parse(new DOMSourceXMLStreamReader(src));
341 private ImmutableMap<QName, Object> getElementAttributes(final XMLStreamReader in) {
342 checkState(in.isStartElement(), "Attributes can be extracted only from START_ELEMENT.");
343 final Map<QName, Object> attributes = new LinkedHashMap<>();
345 for (int attrIndex = 0; attrIndex < in.getAttributeCount(); attrIndex++) {
346 final String attributeNS = in.getAttributeNamespace(attrIndex);
348 // Skip namespace definitions
349 if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(attributeNS)) {
353 final String localName = in.getAttributeLocalName(attrIndex);
354 final String attrValue = in.getAttributeValue(attrIndex);
355 if (Strings.isNullOrEmpty(attributeNS)) {
356 StreamWriterFacade.warnLegacyAttribute(localName);
357 attributes.put(QName.create(LEGACY_ATTRIBUTE_NAMESPACE, localName), attrValue);
361 // Cross-relate attribute namespace to the module
362 final Optional<QNameModule> optModule = resolveXmlNamespace(attributeNS);
363 if (optModule.isPresent()) {
364 final QName qname = QName.create(optModule.get(), localName);
365 final Optional<AnnotationSchemaNode> optAnnotation = AnnotationSchemaNode.find(
366 codecs.getEffectiveModelContext(), qname);
367 if (optAnnotation.isPresent()) {
368 final AnnotationSchemaNode schema = optAnnotation.get();
369 final Object value = codecs.codecFor(schema, stack)
370 .parseValue(in.getNamespaceContext(), attrValue);
371 attributes.put(schema.getQName(), value);
375 LOG.debug("Annotation for {} not found, using legacy QName", qname);
378 attributes.put(QName.create(rawXmlNamespace(attributeNS), localName), attrValue);
381 return ImmutableMap.copyOf(attributes);
384 private static Document readAnyXmlValue(final XMLStreamReader in) throws XMLStreamException {
385 // Underlying reader might return null when asked for version, however when such reader is plugged into
386 // Stax -> DOM transformer, it fails with NPE due to null version. Use default xml version in such case.
387 final XMLStreamReader inWrapper;
388 if (in.getVersion() == null) {
389 inWrapper = new StreamReaderDelegate(in) {
391 public String getVersion() {
392 final String ver = super.getVersion();
393 return ver != null ? ver : XML_STANDARD_VERSION;
400 final DOMResult result = new DOMResult();
402 TRANSFORMER_FACTORY.newTransformer().transform(new StAXSource(inWrapper), result);
403 } catch (final TransformerException e) {
404 throw new XMLStreamException("Unable to read anyxml value", e);
406 return (Document) result.getNode();
409 private void read(final XMLStreamReader in, final AbstractNodeDataWithSchema<?> parent, final String rootElement)
410 throws XMLStreamException {
415 if (parent instanceof LeafNodeDataWithSchema || parent instanceof LeafListEntryNodeDataWithSchema) {
416 parent.setAttributes(getElementAttributes(in));
417 setValue((SimpleNodeDataWithSchema<?>) parent, in.getElementText().trim(), in.getNamespaceContext());
418 if (isNextEndDocument(in)) {
422 if (!isAtElement(in)) {
428 if (parent instanceof ListEntryNodeDataWithSchema || parent instanceof ContainerNodeDataWithSchema) {
429 parent.setAttributes(getElementAttributes(in));
432 if (parent instanceof LeafListNodeDataWithSchema || parent instanceof ListNodeDataWithSchema) {
433 String xmlElementName = in.getLocalName();
434 while (xmlElementName.equals(parent.getSchema().getQName().getLocalName())) {
435 read(in, newEntryNode(parent), rootElement);
436 if (in.getEventType() == XMLStreamConstants.END_DOCUMENT
437 || in.getEventType() == XMLStreamConstants.END_ELEMENT) {
440 xmlElementName = in.getLocalName();
446 if (parent instanceof AnyXmlNodeDataWithSchema) {
447 setValue((AnyXmlNodeDataWithSchema) parent, readAnyXmlValue(in), in.getNamespaceContext());
448 if (isNextEndDocument(in)) {
452 if (!isAtElement(in)) {
459 if (parent instanceof AnydataNodeDataWithSchema) {
460 final AnydataNodeDataWithSchema anydata = (AnydataNodeDataWithSchema) parent;
461 anydata.setObjectModel(DOMSourceAnydata.class);
462 anydata.setAttributes(getElementAttributes(in));
463 setValue(anydata, readAnyXmlValue(in), in.getNamespaceContext());
464 if (isNextEndDocument(in)) {
468 if (!isAtElement(in)) {
475 switch (in.nextTag()) {
476 case XMLStreamConstants.START_ELEMENT:
477 // FIXME: 7.0.0: why do we even need this tracker? either document it or remove it.
478 // it looks like it is a crude duplicate finder, which should really be handled via
479 // ChildReusePolicy.REJECT
480 final Set<Entry<String, String>> namesakes = new HashSet<>();
481 while (in.hasNext()) {
482 final String xmlElementName = in.getLocalName();
483 final DataSchemaNode parentSchema = parent.getSchema();
485 final String parentSchemaName = parentSchema.getQName().getLocalName();
486 if (parentSchemaName.equals(xmlElementName)
487 && in.getEventType() == XMLStreamConstants.END_ELEMENT) {
488 if (isNextEndDocument(in)) {
492 if (!isAtElement(in)) {
498 if (in.isEndElement() && rootElement.equals(xmlElementName)) {
502 final String elementNS = in.getNamespaceURI();
503 final boolean added = namesakes.add(new SimpleImmutableEntry<>(elementNS, xmlElementName));
505 final XMLNamespace nsUri;
507 nsUri = rawXmlNamespace(elementNS).getNamespace();
508 } catch (IllegalArgumentException e) {
509 throw new XMLStreamException("Failed to convert namespace " + xmlElementName, in.getLocation(),
513 final Deque<DataSchemaNode> childDataSchemaNodes =
514 ParserStreamUtils.findSchemaNodeByNameAndNamespace(parentSchema, xmlElementName, nsUri);
515 if (!childDataSchemaNodes.isEmpty()) {
516 final boolean elementList = isElementList(childDataSchemaNodes);
517 if (!added && !elementList) {
518 throw new XMLStreamException(String.format(
519 "Duplicate element \"%s\" in namespace \"%s\" with parent \"%s\" in XML input",
520 xmlElementName, elementNS, parentSchema), in.getLocation());
523 // We have a match, proceed with it
524 final QName qname = childDataSchemaNodes.peekLast().getQName();
525 final AbstractNodeDataWithSchema<?> child = ((CompositeNodeDataWithSchema<?>) parent).addChild(
526 childDataSchemaNodes, elementList ? ChildReusePolicy.REUSE : ChildReusePolicy.NOOP);
527 stack.enterDataTree(qname);
528 read(in, child, rootElement);
533 if (parent instanceof AbstractMountPointDataWithSchema) {
534 // Parent can potentially hold a mount point, let's see if there is a label present
535 final Optional<MountPointSchemaNode> optMount;
536 if (parentSchema instanceof ContainerSchemaNode) {
537 optMount = MountPointSchemaNode.streamAll((ContainerSchemaNode) parentSchema).findFirst();
538 } else if (parentSchema instanceof ListSchemaNode) {
539 optMount = MountPointSchemaNode.streamAll((ListSchemaNode) parentSchema).findFirst();
541 throw new XMLStreamException("Unhandled mount-aware schema " + parentSchema,
545 if (optMount.isPresent()) {
546 final MountPointIdentifier mountId = MountPointIdentifier.of(optMount.get().getQName());
547 LOG.debug("Assuming node {} and namespace {} belongs to mount point {}", xmlElementName,
550 final Optional<MountPointContextFactory> optFactory = codecs.mountPointContext()
551 .findMountPoint(mountId);
552 if (optFactory.isPresent()) {
553 final MountPointData mountData = ((AbstractMountPointDataWithSchema<?>) parent)
554 .getMountPointData(mountId, optFactory.get());
555 addMountPointChild(mountData, nsUri, xmlElementName,
556 new DOMSource(readAnyXmlValue(in).getDocumentElement()));
560 LOG.debug("Mount point {} not attached", mountId);
564 // We have not handled the node -- let's decide what to do about that
566 throw new XMLStreamException(String.format(
567 "Schema for node with name %s and namespace %s does not exist in parent %s", xmlElementName,
568 elementNS, parentSchema), in.getLocation());
571 LOG.debug("Skipping unknown node ns=\"{}\" localName=\"{}\" in parent {}", elementNS,
572 xmlElementName, parentSchema);
576 case XMLStreamConstants.END_ELEMENT:
577 if (isNextEndDocument(in)) {
581 if (!isAtElement(in)) {
590 // Return true if schema represents a construct which uses multiple sibling elements to represent its content. The
591 // siblings MAY be interleaved as per RFC7950.
592 private static boolean isElementList(final Deque<DataSchemaNode> childDataSchemaNodes) {
593 final DataSchemaNode last = childDataSchemaNodes.getLast();
594 return last instanceof ListSchemaNode || last instanceof LeafListSchemaNode;
597 private static void addMountPointChild(final MountPointData mount, final XMLNamespace namespace,
598 final String localName, final DOMSource source) {
599 final DOMSourceMountPointChild child = new DOMSourceMountPointChild(source);
600 if (YangLibraryConstants.MODULE_NAMESPACE.equals(namespace)) {
601 final Optional<ContainerName> optName = ContainerName.forLocalName(localName);
602 if (optName.isPresent()) {
603 mount.setContainer(optName.get(), child);
607 LOG.warn("Encountered unknown element {} from YANG Library namespace", localName);
608 } else if (SchemaMountConstants.RFC8528_MODULE.getNamespace().equals(namespace)) {
609 mount.setSchemaMounts(child);
613 mount.addChild(child);
616 private static boolean isNextEndDocument(final XMLStreamReader in) throws XMLStreamException {
617 return !in.hasNext() || in.next() == XMLStreamConstants.END_DOCUMENT;
620 private static boolean isAtElement(final XMLStreamReader in) {
621 return in.getEventType() == XMLStreamConstants.START_ELEMENT
622 || in.getEventType() == XMLStreamConstants.END_ELEMENT;
625 private static void skipUnknownNode(final XMLStreamReader in) throws XMLStreamException {
626 // in case when the unknown node and at least one of its descendant nodes have the same name
627 // we cannot properly reach the end just by checking if the current node is an end element and has the same name
628 // as the root unknown element. therefore we ignore the names completely and just track the level of nesting
629 int levelOfNesting = 0;
630 while (in.hasNext()) {
631 // in case there are text characters in an element, we cannot skip them by calling nextTag()
632 // therefore we skip them by calling next(), and then proceed to next element
634 if (!isAtElement(in)) {
637 if (in.isStartElement()) {
641 if (in.isEndElement()) {
642 if (levelOfNesting == 0) {
653 private void setValue(final SimpleNodeDataWithSchema<?> parent, final Object value,
654 final NamespaceContext nsContext) {
655 final DataSchemaNode schema = parent.getSchema();
656 final Object prev = parent.getValue();
657 checkArgument(prev == null, "Node '%s' has already set its value to '%s'", schema.getQName(), prev);
658 parent.setValue(translateValueByType(value, schema, nsContext));
661 private Object translateValueByType(final Object value, final DataSchemaNode node,
662 final NamespaceContext namespaceCtx) {
663 if (node instanceof AnyxmlSchemaNode) {
664 checkArgument(value instanceof Document);
666 * FIXME: Figure out some YANG extension dispatch, which will reuse JSON parsing or XML parsing -
667 * anyxml is not well-defined in JSON.
669 return new DOMSource(((Document) value).getDocumentElement());
671 if (node instanceof AnydataSchemaNode) {
672 checkArgument(value instanceof Document);
673 return new DOMSourceAnydata(new DOMSource(((Document) value).getDocumentElement()));
676 checkArgument(node instanceof TypedDataSchemaNode);
677 checkArgument(value instanceof String);
678 return codecs.codecFor((TypedDataSchemaNode) node, stack).parseValue(namespaceCtx, (String) value);
681 private static AbstractNodeDataWithSchema<?> newEntryNode(final AbstractNodeDataWithSchema<?> parent) {
682 verify(parent instanceof MultipleEntryDataWithSchema, "Unexpected parent %s", parent);
683 return ((MultipleEntryDataWithSchema<?>) parent).newChildEntry();
687 public void close() throws IOException {
693 public void flush() throws IOException {
697 private Optional<QNameModule> resolveXmlNamespace(final String xmlNamespace) {
698 return resolvedNamespaces.computeIfAbsent(xmlNamespace, nsUri -> {
699 final Iterator<? extends Module> it = codecs.getEffectiveModelContext().findModules(XMLNamespace.of(nsUri))
701 return it.hasNext() ? Optional.of(it.next().getQNameModule()) : Optional.empty();
705 private QNameModule rawXmlNamespace(final String xmlNamespace) {
706 return rawNamespaces.computeIfAbsent(xmlNamespace, nsUri -> QNameModule.create(XMLNamespace.of(nsUri)));