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 java.util.Objects.requireNonNull;
14 import com.google.common.annotations.Beta;
15 import com.google.common.base.Strings;
16 import com.google.common.base.VerifyException;
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.util.AbstractMap.SimpleImmutableEntry;
22 import java.util.Deque;
23 import java.util.HashMap;
24 import java.util.HashSet;
25 import java.util.LinkedHashMap;
27 import java.util.Map.Entry;
28 import java.util.Optional;
29 import javax.xml.XMLConstants;
30 import javax.xml.namespace.NamespaceContext;
31 import javax.xml.stream.XMLStreamConstants;
32 import javax.xml.stream.XMLStreamException;
33 import javax.xml.stream.XMLStreamReader;
34 import javax.xml.stream.util.StreamReaderDelegate;
35 import javax.xml.transform.TransformerException;
36 import javax.xml.transform.TransformerFactory;
37 import javax.xml.transform.TransformerFactoryConfigurationError;
38 import javax.xml.transform.dom.DOMResult;
39 import javax.xml.transform.dom.DOMSource;
40 import javax.xml.transform.stax.StAXSource;
41 import org.opendaylight.yangtools.rfc7952.model.api.AnnotationSchemaNode;
42 import org.opendaylight.yangtools.rfc8040.model.api.YangDataSchemaNode;
43 import org.opendaylight.yangtools.rfc8528.model.api.MountPointSchemaNode;
44 import org.opendaylight.yangtools.rfc8528.model.api.SchemaMountConstants;
45 import org.opendaylight.yangtools.yang.common.AnnotationName;
46 import org.opendaylight.yangtools.yang.common.QName;
47 import org.opendaylight.yangtools.yang.common.QNameModule;
48 import org.opendaylight.yangtools.yang.common.XMLNamespace;
49 import org.opendaylight.yangtools.yang.common.YangConstants;
50 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
51 import org.opendaylight.yangtools.yang.data.api.schema.MountPointContext;
52 import org.opendaylight.yangtools.yang.data.api.schema.MountPointContextFactory.ContainerName;
53 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
54 import org.opendaylight.yangtools.yang.data.util.AbstractMountPointDataWithSchema;
55 import org.opendaylight.yangtools.yang.data.util.AbstractNodeDataWithSchema;
56 import org.opendaylight.yangtools.yang.data.util.AnyXmlNodeDataWithSchema;
57 import org.opendaylight.yangtools.yang.data.util.AnydataNodeDataWithSchema;
58 import org.opendaylight.yangtools.yang.data.util.CompositeNodeDataWithSchema;
59 import org.opendaylight.yangtools.yang.data.util.CompositeNodeDataWithSchema.ChildReusePolicy;
60 import org.opendaylight.yangtools.yang.data.util.ContainerNodeDataWithSchema;
61 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
62 import org.opendaylight.yangtools.yang.data.util.LeafListEntryNodeDataWithSchema;
63 import org.opendaylight.yangtools.yang.data.util.LeafListNodeDataWithSchema;
64 import org.opendaylight.yangtools.yang.data.util.LeafNodeDataWithSchema;
65 import org.opendaylight.yangtools.yang.data.util.ListEntryNodeDataWithSchema;
66 import org.opendaylight.yangtools.yang.data.util.ListNodeDataWithSchema;
67 import org.opendaylight.yangtools.yang.data.util.MountPointData;
68 import org.opendaylight.yangtools.yang.data.util.MultipleEntryDataWithSchema;
69 import org.opendaylight.yangtools.yang.data.util.ParserStreamUtils;
70 import org.opendaylight.yangtools.yang.data.util.SimpleNodeDataWithSchema;
71 import org.opendaylight.yangtools.yang.model.api.AnydataSchemaNode;
72 import org.opendaylight.yangtools.yang.model.api.AnyxmlSchemaNode;
73 import org.opendaylight.yangtools.yang.model.api.ContainerLike;
74 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
75 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
76 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
77 import org.opendaylight.yangtools.yang.model.api.EffectiveStatementInference;
78 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
79 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
80 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
81 import org.opendaylight.yangtools.yang.model.api.OperationDefinition;
82 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
83 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
84 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
85 import org.slf4j.Logger;
86 import org.slf4j.LoggerFactory;
87 import org.w3c.dom.Document;
90 * This class provides functionality for parsing an XML source containing YANG-modeled data. It disallows multiple
91 * instances of the same element except for leaf-list and list entries. It also expects that the YANG-modeled data in
92 * the XML source are wrapped in a root element. This class is NOT thread-safe.
95 * Due to backwards compatibility reasons, RFC7952 metadata emitted by this parser may include key QNames with empty URI
96 * (as exposed via {@link #LEGACY_ATTRIBUTE_NAMESPACE}) as their QNameModule. These indicate an unqualified XML
97 * attribute and their value can be assumed to be a String. Furthermore, this extends to qualified attributes, which
98 * uses the proper namespace, but will not bind to a proper module revision -- these need to be reconciled with a
99 * particular SchemaContext and are expected to either be fully decoded, or contain a String value. Handling of such
100 * annotations is at the discretion of the user encountering it: preferred way of handling is to either filter or
101 * normalize them to proper QNames/values when encountered. This caveat will be removed in a future version.
104 public final class XmlParserStream implements Closeable, Flushable {
106 * {@link QNameModule} for use with legacy XML attributes.
107 * @deprecated The use on this namespace is discouraged and users are strongly encouraged to proper RFC7952 metadata
111 public static final QNameModule LEGACY_ATTRIBUTE_NAMESPACE = QNameModule.create(XMLNamespace.of("")).intern();
113 private static final Logger LOG = LoggerFactory.getLogger(XmlParserStream.class);
114 private static final String XML_STANDARD_VERSION = "1.0";
115 private static final String COM_SUN_TRANSFORMER =
116 "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl";
118 private static final TransformerFactory TRANSFORMER_FACTORY;
121 TransformerFactory fa = TransformerFactory.newInstance();
122 if (!fa.getFeature(StAXSource.FEATURE)) {
123 LOG.warn("Platform-default TransformerFactory {} does not support StAXSource, attempting fallback to {}",
124 fa, COM_SUN_TRANSFORMER);
125 fa = TransformerFactory.newInstance(COM_SUN_TRANSFORMER, null);
126 if (!fa.getFeature(StAXSource.FEATURE)) {
127 throw new TransformerFactoryConfigurationError("No TransformerFactory supporting StAXResult found.");
131 TRANSFORMER_FACTORY = fa;
134 // Cache of nsUri Strings to QNameModules, as resolved in context
135 private final Map<String, Optional<QNameModule>> resolvedNamespaces = new HashMap<>();
136 // Cache of nsUri Strings to QNameModules, as inferred from document
137 private final Map<String, QNameModule> rawNamespaces = new HashMap<>();
138 private final NormalizedNodeStreamWriter writer;
139 private final SchemaInferenceStack stack;
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 SchemaInferenceStack stack, final boolean strictParsing) {
146 this.writer = requireNonNull(writer);
147 this.codecs = requireNonNull(codecs);
148 this.stack = requireNonNull(stack);
149 this.strictParsing = strictParsing;
151 if (!stack.isEmpty()) {
152 final var stmt = stack.currentStatement();
153 if (stmt instanceof DataSchemaNode data) {
155 } else if (stmt instanceof OperationDefinition oper) {
156 parentNode = oper.toContainerLike();
157 } else if (stmt instanceof NotificationDefinition notif) {
158 parentNode = notif.toContainerLike();
159 } else if (stmt instanceof YangDataSchemaNode yangData) {
160 parentNode = yangData.toContainerLike();
162 throw new IllegalArgumentException("Illegal parent node " + stmt);
165 parentNode = stack.getEffectiveModelContext();
170 * Construct a new {@link XmlParserStream} with strict parsing mode switched on.
172 * @param writer Output writer
173 * @param codecs Shared codecs
174 * @param parentNode Parent root node
175 * @return A new stream instance
177 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
178 final EffectiveStatementInference parentNode) {
179 return create(writer, codecs, parentNode, true);
183 * Construct a new {@link XmlParserStream}.
185 * @param writer Output writer
186 * @param codecs Shared codecs
187 * @param parentNode Parent root node
188 * @param strictParsing parsing mode
189 * if set to true, the parser will throw an exception if it encounters unknown child nodes
190 * (nodes, that are not defined in the provided SchemaContext) in containers and lists
191 * if set to false, the parser will skip unknown child nodes
192 * @return A new stream instance
194 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
195 final EffectiveStatementInference parentNode, final boolean strictParsing) {
196 return new XmlParserStream(writer, codecs, SchemaInferenceStack.ofInference(parentNode), strictParsing);
200 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
201 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
202 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
204 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
205 final EffectiveModelContext context) {
206 return create(writer, context, true);
210 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
211 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
212 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
214 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
215 final EffectiveModelContext context, final boolean strictParsing) {
216 return create(writer, SchemaInferenceStack.of(context).toInference(), strictParsing);
220 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
221 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
222 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
224 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
225 final EffectiveStatementInference parentNode) {
226 return create(writer, parentNode, true);
230 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
231 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
232 * instead and maintain a {@link XmlCodecFactory} to match the current {@link EffectiveModelContext}.
234 public static XmlParserStream create(final NormalizedNodeStreamWriter writer,
235 final EffectiveStatementInference parentNode, final boolean strictParsing) {
236 return create(writer, XmlCodecFactory.create(parentNode.getEffectiveModelContext()), parentNode, strictParsing);
240 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
241 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
242 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
244 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx) {
245 return create(writer, mountCtx, SchemaInferenceStack.of(mountCtx.getEffectiveModelContext()).toInference(),
250 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
251 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
252 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
254 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
255 final EffectiveStatementInference parentNode) {
256 return create(writer, mountCtx, parentNode, true);
260 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
261 final Absolute parentNode) {
262 return create(writer, mountCtx, parentNode, true);
266 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
267 final Absolute parentNode, final boolean strictParsing) {
268 return create(writer, XmlCodecFactory.create(mountCtx), parentNode, strictParsing);
272 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
273 final Absolute parentNode) {
274 return create(writer, codecs, parentNode, true);
278 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
279 final Absolute parentNode, final boolean strictParsing) {
280 return new XmlParserStream(writer, codecs,
281 SchemaInferenceStack.of(codecs.getEffectiveModelContext(), parentNode), strictParsing);
285 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
286 final YangInstanceIdentifier parentNode) {
287 return create(writer, mountCtx, parentNode, true);
291 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
292 final YangInstanceIdentifier parentNode, final boolean strictParsing) {
293 final var init = DataSchemaContextTree.from(mountCtx.getEffectiveModelContext())
294 .enterPath(parentNode)
296 return new XmlParserStream(writer, XmlCodecFactory.create(mountCtx), init.stack(), strictParsing);
300 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
301 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
302 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
304 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
305 final EffectiveStatementInference parentNode, final boolean strictParsing) {
306 return create(writer, XmlCodecFactory.create(mountCtx), parentNode, strictParsing);
310 * This method parses the XML source and emits node events into a NormalizedNodeStreamWriter based on the
311 * YANG-modeled data contained in the XML source.
314 * StAX reader which is to used to walk through the XML source
316 * instance of XmlParserStream
317 * @throws XMLStreamException
318 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
319 * @throws IOException
320 * if an error occurs while parsing the value of an anyxml node
322 public XmlParserStream parse(final XMLStreamReader reader) throws XMLStreamException, IOException {
323 if (reader.hasNext()) {
325 final var nodeDataWithSchema = AbstractNodeDataWithSchema.of(parentNode);
326 read(reader, nodeDataWithSchema, reader.getLocalName());
327 nodeDataWithSchema.write(writer);
334 * This method traverses a {@link DOMSource} and emits node events into a NormalizedNodeStreamWriter based on the
335 * YANG-modeled data contained in the source.
338 * {@link DOMSource} to be traversed
340 * instance of XmlParserStream
341 * @throws XMLStreamException
342 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
343 * @throws IOException
344 * if an error occurs while parsing the value of an anyxml node
347 public XmlParserStream traverse(final DOMSource src) throws XMLStreamException, IOException {
348 return parse(new DOMSourceXMLStreamReader(src));
351 private ImmutableMap<QName, Object> getElementAttributes(final XMLStreamReader in) {
352 checkState(in.isStartElement(), "Attributes can be extracted only from START_ELEMENT.");
353 final var attributes = new LinkedHashMap<QName, Object>();
355 for (int attrIndex = 0; attrIndex < in.getAttributeCount(); attrIndex++) {
356 final String attributeNS = in.getAttributeNamespace(attrIndex);
358 // Skip namespace definitions
359 if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(attributeNS)) {
363 final String localName = in.getAttributeLocalName(attrIndex);
364 final String attrValue = in.getAttributeValue(attrIndex);
365 if (Strings.isNullOrEmpty(attributeNS)) {
366 StreamWriterFacade.warnLegacyAttribute(localName);
367 attributes.put(QName.create(LEGACY_ATTRIBUTE_NAMESPACE, localName), attrValue);
371 // Cross-relate attribute namespace to the module
372 final Optional<QNameModule> optModule = resolveXmlNamespace(attributeNS);
373 if (optModule.isPresent()) {
374 final QName qname = QName.create(optModule.orElseThrow(), localName);
375 final var optAnnotation = AnnotationSchemaNode.find(codecs.getEffectiveModelContext(),
376 new AnnotationName(qname));
377 if (optAnnotation.isPresent()) {
378 final AnnotationSchemaNode schema = optAnnotation.orElseThrow();
379 final Object value = codecs.codecFor(schema, stack)
380 .parseValue(in.getNamespaceContext(), attrValue);
381 attributes.put(schema.getQName(), value);
385 LOG.debug("Annotation for {} not found, using legacy QName", qname);
388 attributes.put(QName.create(rawXmlNamespace(attributeNS), localName), attrValue);
391 return ImmutableMap.copyOf(attributes);
394 private static Document readAnyXmlValue(final XMLStreamReader in) throws XMLStreamException {
395 // Underlying reader might return null when asked for version, however when such reader is plugged into
396 // Stax -> DOM transformer, it fails with NPE due to null version. Use default xml version in such case.
397 final XMLStreamReader inWrapper;
398 if (in.getVersion() == null) {
399 inWrapper = new StreamReaderDelegate(in) {
401 public String getVersion() {
402 final String ver = super.getVersion();
403 return ver != null ? ver : XML_STANDARD_VERSION;
410 final DOMResult result = new DOMResult();
412 TRANSFORMER_FACTORY.newTransformer().transform(new StAXSource(inWrapper), result);
413 } catch (final TransformerException e) {
414 throw new XMLStreamException("Unable to read anyxml value", e);
416 return (Document) result.getNode();
419 private void read(final XMLStreamReader in, final AbstractNodeDataWithSchema<?> parent, final String rootElement)
420 throws XMLStreamException {
425 if (parent instanceof LeafNodeDataWithSchema || parent instanceof LeafListEntryNodeDataWithSchema) {
426 parent.setAttributes(getElementAttributes(in));
427 setValue((SimpleNodeDataWithSchema<?>) parent, in.getElementText(), in.getNamespaceContext());
428 if (isNextEndDocument(in)) {
432 if (!isAtElement(in)) {
438 if (parent instanceof ListEntryNodeDataWithSchema || parent instanceof ContainerNodeDataWithSchema) {
439 parent.setAttributes(getElementAttributes(in));
442 if (parent instanceof LeafListNodeDataWithSchema || parent instanceof ListNodeDataWithSchema) {
443 final String localName = in.getLocalName();
444 final String namespaceURI = in.getNamespaceURI();
445 // aggregate current and subsequent nodes having same localName and namespace
446 // into set of entries belonging to current parent node
447 while (localName.equals(in.getLocalName()) && namespaceURI.equals(in.getNamespaceURI())) {
448 read(in, newEntryNode(parent), rootElement);
449 if (in.getEventType() == XMLStreamConstants.END_DOCUMENT
450 || in.getEventType() == XMLStreamConstants.END_ELEMENT) {
457 if (parent instanceof AnyXmlNodeDataWithSchema anyxml) {
458 setValue(anyxml, readAnyXmlValue(in), in.getNamespaceContext());
459 if (isNextEndDocument(in)) {
463 if (!isAtElement(in)) {
470 if (parent instanceof AnydataNodeDataWithSchema anydata) {
471 anydata.setObjectModel(DOMSourceAnydata.class);
472 anydata.setAttributes(getElementAttributes(in));
473 setValue(anydata, readAnyXmlValue(in), in.getNamespaceContext());
474 if (isNextEndDocument(in)) {
478 if (!isAtElement(in)) {
485 switch (in.nextTag()) {
486 case XMLStreamConstants.START_ELEMENT:
487 // FIXME: 7.0.0: why do we even need this tracker? either document it or remove it.
488 // it looks like it is a crude duplicate finder, which should really be handled via
489 // ChildReusePolicy.REJECT
490 final var namesakes = new HashSet<Entry<String, String>>();
491 while (in.hasNext()) {
492 final String xmlElementName = in.getLocalName();
493 final DataSchemaNode parentSchema = parent.getSchema();
495 final String parentSchemaName = parentSchema.getQName().getLocalName();
496 if (parentSchemaName.equals(xmlElementName)
497 && in.getEventType() == XMLStreamConstants.END_ELEMENT) {
498 if (isNextEndDocument(in)) {
502 if (!isAtElement(in)) {
508 if (in.isEndElement() && rootElement.equals(xmlElementName)) {
512 final String elementNS = in.getNamespaceURI();
513 final boolean added = namesakes.add(new SimpleImmutableEntry<>(elementNS, xmlElementName));
515 final XMLNamespace nsUri;
517 nsUri = rawXmlNamespace(elementNS).getNamespace();
518 } catch (IllegalArgumentException e) {
519 throw new XMLStreamException("Failed to convert namespace " + xmlElementName, in.getLocation(),
523 final Deque<DataSchemaNode> childDataSchemaNodes =
524 ParserStreamUtils.findSchemaNodeByNameAndNamespace(parentSchema, xmlElementName, nsUri);
525 if (!childDataSchemaNodes.isEmpty()) {
526 final boolean elementList = isElementList(childDataSchemaNodes);
527 if (!added && !elementList) {
528 throw new XMLStreamException(String.format(
529 "Duplicate element \"%s\" in namespace \"%s\" with parent \"%s\" in XML input",
530 xmlElementName, elementNS, parentSchema), in.getLocation());
533 // We have a match, proceed with it
534 final QName qname = childDataSchemaNodes.peekLast().getQName();
535 final AbstractNodeDataWithSchema<?> child = ((CompositeNodeDataWithSchema<?>) parent).addChild(
536 childDataSchemaNodes, elementList ? ChildReusePolicy.REUSE : ChildReusePolicy.NOOP);
537 stack.enterDataTree(qname);
538 read(in, child, rootElement);
543 if (parent instanceof AbstractMountPointDataWithSchema<?> mountParent) {
544 // Parent can potentially hold a mount point, let's see if there is a label present. We
545 // explicitly unmask Optional to null so as to not to lead us on to functional programming,
547 final MountPointSchemaNode mount;
548 if (parentSchema instanceof ContainerSchemaNode container) {
549 mount = MountPointSchemaNode.streamAll(container).findFirst().orElse(null);
550 } else if (parentSchema instanceof ListSchemaNode list) {
551 mount = MountPointSchemaNode.streamAll(list).findFirst().orElse(null);
552 } else if (parentSchema instanceof ContainerLike) {
555 throw new XMLStreamException("Unhandled mount-aware schema " + parentSchema,
560 final var label = mount.asEffectiveStatement().argument();
561 LOG.debug("Assuming node {} and namespace {} belongs to mount point {}", xmlElementName,
564 final var optFactory = codecs.mountPointContext().findMountPoint(label);
565 if (optFactory.isPresent()) {
566 final var mountData = mountParent.getMountPointData(label, optFactory.orElseThrow());
567 addMountPointChild(mountData, nsUri, xmlElementName,
568 new DOMSource(readAnyXmlValue(in).getDocumentElement()));
569 // ... this call does not work with functional programming
573 LOG.debug("Mount point {} not attached", label);
577 // We have not handled the node -- let's decide what to do about that
579 throw new XMLStreamException(String.format(
580 "Schema for node with name %s and namespace %s does not exist in parent %s", xmlElementName,
581 elementNS, parentSchema), in.getLocation());
584 LOG.debug("Skipping unknown node ns=\"{}\" localName=\"{}\" in parent {}", elementNS,
585 xmlElementName, parentSchema);
589 case XMLStreamConstants.END_ELEMENT:
590 if (isNextEndDocument(in)) {
594 if (!isAtElement(in)) {
603 // Return true if schema represents a construct which uses multiple sibling elements to represent its content. The
604 // siblings MAY be interleaved as per RFC7950.
605 private static boolean isElementList(final Deque<DataSchemaNode> childDataSchemaNodes) {
606 final DataSchemaNode last = childDataSchemaNodes.getLast();
607 return last instanceof ListSchemaNode || last instanceof LeafListSchemaNode;
610 private static void addMountPointChild(final MountPointData mount, final XMLNamespace namespace,
611 final String localName, final DOMSource source) {
612 final DOMSourceMountPointChild child = new DOMSourceMountPointChild(source);
613 if (YangConstants.YANG_LIBRARY_NAMESPACE.equals(namespace)) {
614 final var optName = ContainerName.forLocalName(localName);
615 if (optName != null) {
616 mount.setContainer(optName, child);
620 LOG.warn("Encountered unknown element {} from YANG Library namespace", localName);
621 } else if (SchemaMountConstants.RFC8528_MODULE.getNamespace().equals(namespace)) {
622 mount.setSchemaMounts(child);
626 mount.addChild(child);
629 private static boolean isNextEndDocument(final XMLStreamReader in) throws XMLStreamException {
630 return !in.hasNext() || in.next() == XMLStreamConstants.END_DOCUMENT;
633 private static boolean isAtElement(final XMLStreamReader in) {
634 return in.getEventType() == XMLStreamConstants.START_ELEMENT
635 || in.getEventType() == XMLStreamConstants.END_ELEMENT;
638 private static void skipUnknownNode(final XMLStreamReader in) throws XMLStreamException {
639 // in case when the unknown node and at least one of its descendant nodes have the same name
640 // we cannot properly reach the end just by checking if the current node is an end element and has the same name
641 // as the root unknown element. therefore we ignore the names completely and just track the level of nesting
642 int levelOfNesting = 0;
643 while (in.hasNext()) {
644 // in case there are text characters in an element, we cannot skip them by calling nextTag()
645 // therefore we skip them by calling next(), and then proceed to next element
647 if (!isAtElement(in)) {
650 if (in.isStartElement()) {
654 if (in.isEndElement()) {
655 if (levelOfNesting == 0) {
666 private void setValue(final SimpleNodeDataWithSchema<?> parent, final Object value,
667 final NamespaceContext nsContext) {
668 final DataSchemaNode schema = parent.getSchema();
669 final Object prev = parent.getValue();
670 checkArgument(prev == null, "Node '%s' has already set its value to '%s'", schema.getQName(), prev);
671 parent.setValue(translateValueByType(value, schema, nsContext));
674 private Object translateValueByType(final Object value, final DataSchemaNode node,
675 final NamespaceContext namespaceCtx) {
676 if (node instanceof AnyxmlSchemaNode) {
677 checkArgument(value instanceof Document);
679 * FIXME: Figure out some YANG extension dispatch, which will reuse JSON parsing or XML parsing -
680 * anyxml is not well-defined in JSON.
682 return new DOMSource(((Document) value).getDocumentElement());
683 } else if (node instanceof AnydataSchemaNode) {
684 checkArgument(value instanceof Document);
685 return new DOMSourceAnydata(new DOMSource(((Document) value).getDocumentElement()));
686 } else if (node instanceof TypedDataSchemaNode typedNode) {
687 checkArgument(value instanceof String);
688 return codecs.codecFor(typedNode, stack).parseValue(namespaceCtx, (String) value);
690 throw new IllegalStateException("Unhandled schema " + node);
694 private static AbstractNodeDataWithSchema<?> newEntryNode(final AbstractNodeDataWithSchema<?> parent) {
695 if (parent instanceof MultipleEntryDataWithSchema<?> multiEntry) {
696 return multiEntry.newChildEntry();
698 throw new VerifyException("Unexpected parent " + parent);
702 public void close() throws IOException {
708 public void flush() throws IOException {
712 private Optional<QNameModule> resolveXmlNamespace(final String xmlNamespace) {
713 return resolvedNamespaces.computeIfAbsent(xmlNamespace, nsUri -> {
714 final var it = codecs.getEffectiveModelContext().findModuleStatements(XMLNamespace.of(nsUri)).iterator();
715 return it.hasNext() ? Optional.of(it.next().localQNameModule()) : Optional.empty();
719 private QNameModule rawXmlNamespace(final String xmlNamespace) {
720 return rawNamespaces.computeIfAbsent(xmlNamespace, nsUri -> QNameModule.create(XMLNamespace.of(nsUri)));