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.OperationAsContainer;
71 import org.opendaylight.yangtools.yang.data.util.ParserStreamUtils;
72 import org.opendaylight.yangtools.yang.data.util.SimpleNodeDataWithSchema;
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.ContainerLike;
76 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
77 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
78 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
79 import org.opendaylight.yangtools.yang.model.api.EffectiveStatementInference;
80 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
81 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
82 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
83 import org.opendaylight.yangtools.yang.model.api.Module;
84 import org.opendaylight.yangtools.yang.model.api.OperationDefinition;
85 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
86 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
87 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
88 import org.slf4j.Logger;
89 import org.slf4j.LoggerFactory;
90 import org.w3c.dom.Document;
91 import org.xml.sax.SAXException;
94 * This class provides functionality for parsing an XML source containing YANG-modeled data. It disallows multiple
95 * instances of the same element except for leaf-list and list entries. It also expects that the YANG-modeled data in
96 * the XML source are wrapped in a root element. This class is NOT thread-safe.
99 * Due to backwards compatibility reasons, RFC7952 metadata emitted by this parser may include key QNames with empty URI
100 * (as exposed via {@link #LEGACY_ATTRIBUTE_NAMESPACE}) as their QNameModule. These indicate an unqualified XML
101 * attribute and their value can be assumed to be a String. Furthermore, this extends to qualified attributes, which
102 * uses the proper namespace, but will not bind to a proper module revision -- these need to be reconciled with a
103 * particular SchemaContext and are expected to either be fully decoded, or contain a String value. Handling of such
104 * annotations is at the discretion of the user encountering it: preferred way of handling is to either filter or
105 * normalize them to proper QNames/values when encountered. This caveat will be removed in a future version.
108 public final class XmlParserStream implements Closeable, Flushable {
110 * {@link QNameModule} for use with legacy XML attributes.
111 * @deprecated The use on this namespace is discouraged and users are strongly encouraged to proper RFC7952 metadata
115 public static final QNameModule LEGACY_ATTRIBUTE_NAMESPACE = QNameModule.create(XMLNamespace.of("")).intern();
117 private static final Logger LOG = LoggerFactory.getLogger(XmlParserStream.class);
118 private static final String XML_STANDARD_VERSION = "1.0";
119 private static final String COM_SUN_TRANSFORMER =
120 "com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl";
122 private static final TransformerFactory TRANSFORMER_FACTORY;
125 TransformerFactory fa = TransformerFactory.newInstance();
126 if (!fa.getFeature(StAXSource.FEATURE)) {
127 LOG.warn("Platform-default TransformerFactory {} does not support StAXSource, attempting fallback to {}",
128 fa, COM_SUN_TRANSFORMER);
129 fa = TransformerFactory.newInstance(COM_SUN_TRANSFORMER, null);
130 if (!fa.getFeature(StAXSource.FEATURE)) {
131 throw new TransformerFactoryConfigurationError("No TransformerFactory supporting StAXResult found.");
135 TRANSFORMER_FACTORY = fa;
138 // Cache of nsUri Strings to QNameModules, as resolved in context
139 private final Map<String, Optional<QNameModule>> resolvedNamespaces = new HashMap<>();
140 // Cache of nsUri Strings to QNameModules, as inferred from document
141 private final Map<String, QNameModule> rawNamespaces = new HashMap<>();
142 private final NormalizedNodeStreamWriter writer;
143 private final SchemaInferenceStack stack;
144 private final XmlCodecFactory codecs;
145 private final DataSchemaNode parentNode;
146 private final boolean strictParsing;
148 private XmlParserStream(final NormalizedNodeStreamWriter writer, final XmlCodecFactory codecs,
149 final SchemaInferenceStack stack, final boolean strictParsing) {
150 this.writer = requireNonNull(writer);
151 this.codecs = requireNonNull(codecs);
152 this.stack = requireNonNull(stack);
153 this.strictParsing = strictParsing;
155 if (!stack.isEmpty()) {
156 final EffectiveStatement<?, ?> stmt = stack.currentStatement();
157 if (stmt instanceof DataSchemaNode) {
158 parentNode = (DataSchemaNode) stmt;
159 } else if (stmt instanceof OperationDefinition) {
160 parentNode = OperationAsContainer.of((OperationDefinition) stmt);
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 * Utility method for use when caching {@link XmlCodecFactory} is not feasible. Users with high performance
261 * requirements should use {@link #create(NormalizedNodeStreamWriter, XmlCodecFactory, EffectiveStatementInference)}
262 * instead and maintain a {@link XmlCodecFactory} to match the current {@link MountPointContext}.
264 public static XmlParserStream create(final NormalizedNodeStreamWriter writer, final MountPointContext mountCtx,
265 final EffectiveStatementInference parentNode, final boolean strictParsing) {
266 return create(writer, XmlCodecFactory.create(mountCtx), parentNode, strictParsing);
270 * This method parses the XML source and emits node events into a NormalizedNodeStreamWriter based on the
271 * YANG-modeled data contained in the XML source.
274 * StAX reader which is to used to walk through the XML source
276 * instance of XmlParserStream
277 * @throws XMLStreamException
278 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
279 * @throws URISyntaxException
280 * if the namespace URI of an XML element contains a syntax error
281 * @throws IOException
282 * if an error occurs while parsing the value of an anyxml node
283 * @throws SAXException
284 * if an error occurs while parsing the value of an anyxml node
286 public XmlParserStream parse(final XMLStreamReader reader) throws XMLStreamException, URISyntaxException,
287 IOException, SAXException {
288 if (reader.hasNext()) {
290 final AbstractNodeDataWithSchema<?> nodeDataWithSchema;
291 if (parentNode instanceof ContainerLike) {
292 nodeDataWithSchema = new ContainerNodeDataWithSchema((ContainerLike) parentNode);
293 } else if (parentNode instanceof ListSchemaNode) {
294 nodeDataWithSchema = new ListNodeDataWithSchema((ListSchemaNode) parentNode);
295 } else if (parentNode instanceof AnyxmlSchemaNode) {
296 nodeDataWithSchema = new AnyXmlNodeDataWithSchema((AnyxmlSchemaNode) parentNode);
297 } else if (parentNode instanceof LeafSchemaNode) {
298 nodeDataWithSchema = new LeafNodeDataWithSchema((LeafSchemaNode) parentNode);
299 } else if (parentNode instanceof LeafListSchemaNode) {
300 nodeDataWithSchema = new LeafListNodeDataWithSchema((LeafListSchemaNode) parentNode);
301 } else if (parentNode instanceof AnydataSchemaNode) {
302 nodeDataWithSchema = new AnydataNodeDataWithSchema((AnydataSchemaNode) parentNode);
304 throw new IllegalStateException("Unsupported schema node type " + parentNode.getClass() + ".");
307 read(reader, nodeDataWithSchema, reader.getLocalName());
308 nodeDataWithSchema.write(writer);
315 * This method traverses a {@link DOMSource} and emits node events into a NormalizedNodeStreamWriter based on the
316 * YANG-modeled data contained in the source.
319 * {@link DOMSource} to be traversed
321 * instance of XmlParserStream
322 * @throws XMLStreamException
323 * if a well-formedness error or an unexpected processing condition occurs while parsing the XML
324 * @throws URISyntaxException
325 * if the namespace URI of an XML element contains a syntax error
326 * @throws IOException
327 * if an error occurs while parsing the value of an anyxml node
328 * @throws SAXException
329 * if an error occurs while parsing the value of an anyxml node
332 public XmlParserStream traverse(final DOMSource src) throws XMLStreamException, URISyntaxException, IOException,
334 return parse(new DOMSourceXMLStreamReader(src));
337 private ImmutableMap<QName, Object> getElementAttributes(final XMLStreamReader in) {
338 checkState(in.isStartElement(), "Attributes can be extracted only from START_ELEMENT.");
339 final Map<QName, Object> attributes = new LinkedHashMap<>();
341 for (int attrIndex = 0; attrIndex < in.getAttributeCount(); attrIndex++) {
342 final String attributeNS = in.getAttributeNamespace(attrIndex);
344 // Skip namespace definitions
345 if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(attributeNS)) {
349 final String localName = in.getAttributeLocalName(attrIndex);
350 final String attrValue = in.getAttributeValue(attrIndex);
351 if (Strings.isNullOrEmpty(attributeNS)) {
352 StreamWriterFacade.warnLegacyAttribute(localName);
353 attributes.put(QName.create(LEGACY_ATTRIBUTE_NAMESPACE, localName), attrValue);
357 // Cross-relate attribute namespace to the module
358 final Optional<QNameModule> optModule = resolveXmlNamespace(attributeNS);
359 if (optModule.isPresent()) {
360 final QName qname = QName.create(optModule.get(), localName);
361 final Optional<AnnotationSchemaNode> optAnnotation = AnnotationSchemaNode.find(
362 codecs.getEffectiveModelContext(), qname);
363 if (optAnnotation.isPresent()) {
364 final AnnotationSchemaNode schema = optAnnotation.get();
365 final Object value = codecs.codecFor(schema, stack)
366 .parseValue(in.getNamespaceContext(), attrValue);
367 attributes.put(schema.getQName(), value);
371 LOG.debug("Annotation for {} not found, using legacy QName", qname);
374 attributes.put(QName.create(rawXmlNamespace(attributeNS), localName), attrValue);
377 return ImmutableMap.copyOf(attributes);
380 private static Document readAnyXmlValue(final XMLStreamReader in) throws XMLStreamException {
381 // Underlying reader might return null when asked for version, however when such reader is plugged into
382 // Stax -> DOM transformer, it fails with NPE due to null version. Use default xml version in such case.
383 final XMLStreamReader inWrapper;
384 if (in.getVersion() == null) {
385 inWrapper = new StreamReaderDelegate(in) {
387 public String getVersion() {
388 final String ver = super.getVersion();
389 return ver != null ? ver : XML_STANDARD_VERSION;
396 final DOMResult result = new DOMResult();
398 TRANSFORMER_FACTORY.newTransformer().transform(new StAXSource(inWrapper), result);
399 } catch (final TransformerException e) {
400 throw new XMLStreamException("Unable to read anyxml value", e);
402 return (Document) result.getNode();
405 private void read(final XMLStreamReader in, final AbstractNodeDataWithSchema<?> parent, final String rootElement)
406 throws XMLStreamException {
411 if (parent instanceof LeafNodeDataWithSchema || parent instanceof LeafListEntryNodeDataWithSchema) {
412 parent.setAttributes(getElementAttributes(in));
413 setValue((SimpleNodeDataWithSchema<?>) parent, in.getElementText().trim(), in.getNamespaceContext());
414 if (isNextEndDocument(in)) {
418 if (!isAtElement(in)) {
424 if (parent instanceof ListEntryNodeDataWithSchema || parent instanceof ContainerNodeDataWithSchema) {
425 parent.setAttributes(getElementAttributes(in));
428 if (parent instanceof LeafListNodeDataWithSchema || parent instanceof ListNodeDataWithSchema) {
429 String xmlElementName = in.getLocalName();
430 while (xmlElementName.equals(parent.getSchema().getQName().getLocalName())) {
431 read(in, newEntryNode(parent), rootElement);
432 if (in.getEventType() == XMLStreamConstants.END_DOCUMENT
433 || in.getEventType() == XMLStreamConstants.END_ELEMENT) {
436 xmlElementName = in.getLocalName();
442 if (parent instanceof AnyXmlNodeDataWithSchema) {
443 setValue((AnyXmlNodeDataWithSchema) parent, readAnyXmlValue(in), in.getNamespaceContext());
444 if (isNextEndDocument(in)) {
448 if (!isAtElement(in)) {
455 if (parent instanceof AnydataNodeDataWithSchema) {
456 final AnydataNodeDataWithSchema anydata = (AnydataNodeDataWithSchema) parent;
457 anydata.setObjectModel(DOMSourceAnydata.class);
458 anydata.setAttributes(getElementAttributes(in));
459 setValue(anydata, readAnyXmlValue(in), in.getNamespaceContext());
460 if (isNextEndDocument(in)) {
464 if (!isAtElement(in)) {
471 switch (in.nextTag()) {
472 case XMLStreamConstants.START_ELEMENT:
473 // FIXME: 7.0.0: why do we even need this tracker? either document it or remove it.
474 // it looks like it is a crude duplicate finder, which should really be handled via
475 // ChildReusePolicy.REJECT
476 final Set<Entry<String, String>> namesakes = new HashSet<>();
477 while (in.hasNext()) {
478 final String xmlElementName = in.getLocalName();
479 final DataSchemaNode parentSchema = parent.getSchema();
481 final String parentSchemaName = parentSchema.getQName().getLocalName();
482 if (parentSchemaName.equals(xmlElementName)
483 && in.getEventType() == XMLStreamConstants.END_ELEMENT) {
484 if (isNextEndDocument(in)) {
488 if (!isAtElement(in)) {
494 if (in.isEndElement() && rootElement.equals(xmlElementName)) {
498 final String elementNS = in.getNamespaceURI();
499 final boolean added = namesakes.add(new SimpleImmutableEntry<>(elementNS, xmlElementName));
501 final XMLNamespace nsUri;
503 nsUri = rawXmlNamespace(elementNS).getNamespace();
504 } catch (IllegalArgumentException e) {
505 throw new XMLStreamException("Failed to convert namespace " + xmlElementName, in.getLocation(),
509 final Deque<DataSchemaNode> childDataSchemaNodes =
510 ParserStreamUtils.findSchemaNodeByNameAndNamespace(parentSchema, xmlElementName, nsUri);
511 if (!childDataSchemaNodes.isEmpty()) {
512 final boolean elementList = isElementList(childDataSchemaNodes);
513 if (!added && !elementList) {
514 throw new XMLStreamException(String.format(
515 "Duplicate element \"%s\" in namespace \"%s\" with parent \"%s\" in XML input",
516 xmlElementName, elementNS, parentSchema), in.getLocation());
519 // We have a match, proceed with it
520 final QName qname = childDataSchemaNodes.peekLast().getQName();
521 final AbstractNodeDataWithSchema<?> child = ((CompositeNodeDataWithSchema<?>) parent).addChild(
522 childDataSchemaNodes, elementList ? ChildReusePolicy.REUSE : ChildReusePolicy.NOOP);
523 stack.enterDataTree(qname);
524 read(in, child, rootElement);
529 if (parent instanceof AbstractMountPointDataWithSchema) {
530 // Parent can potentially hold a mount point, let's see if there is a label present
531 final Optional<MountPointSchemaNode> optMount;
532 if (parentSchema instanceof ContainerSchemaNode) {
533 optMount = MountPointSchemaNode.streamAll((ContainerSchemaNode) parentSchema).findFirst();
534 } else if (parentSchema instanceof ListSchemaNode) {
535 optMount = MountPointSchemaNode.streamAll((ListSchemaNode) parentSchema).findFirst();
537 throw new XMLStreamException("Unhandled mount-aware schema " + parentSchema,
541 if (optMount.isPresent()) {
542 final MountPointIdentifier mountId = MountPointIdentifier.of(optMount.get().getQName());
543 LOG.debug("Assuming node {} and namespace {} belongs to mount point {}", xmlElementName,
546 final Optional<MountPointContextFactory> optFactory = codecs.mountPointContext()
547 .findMountPoint(mountId);
548 if (optFactory.isPresent()) {
549 final MountPointData mountData = ((AbstractMountPointDataWithSchema<?>) parent)
550 .getMountPointData(mountId, optFactory.get());
551 addMountPointChild(mountData, nsUri, xmlElementName,
552 new DOMSource(readAnyXmlValue(in).getDocumentElement()));
556 LOG.debug("Mount point {} not attached", mountId);
560 // We have not handled the node -- let's decide what to do about that
562 throw new XMLStreamException(String.format(
563 "Schema for node with name %s and namespace %s does not exist in parent %s", xmlElementName,
564 elementNS, parentSchema), in.getLocation());
567 LOG.debug("Skipping unknown node ns=\"{}\" localName=\"{}\" in parent {}", elementNS,
568 xmlElementName, parentSchema);
572 case XMLStreamConstants.END_ELEMENT:
573 if (isNextEndDocument(in)) {
577 if (!isAtElement(in)) {
586 // Return true if schema represents a construct which uses multiple sibling elements to represent its content. The
587 // siblings MAY be interleaved as per RFC7950.
588 private static boolean isElementList(final Deque<DataSchemaNode> childDataSchemaNodes) {
589 final DataSchemaNode last = childDataSchemaNodes.getLast();
590 return last instanceof ListSchemaNode || last instanceof LeafListSchemaNode;
593 private static void addMountPointChild(final MountPointData mount, final XMLNamespace namespace,
594 final String localName, final DOMSource source) {
595 final DOMSourceMountPointChild child = new DOMSourceMountPointChild(source);
596 if (YangLibraryConstants.MODULE_NAMESPACE.equals(namespace)) {
597 final Optional<ContainerName> optName = ContainerName.forLocalName(localName);
598 if (optName.isPresent()) {
599 mount.setContainer(optName.get(), child);
603 LOG.warn("Encountered unknown element {} from YANG Library namespace", localName);
604 } else if (SchemaMountConstants.RFC8528_MODULE.getNamespace().equals(namespace)) {
605 mount.setSchemaMounts(child);
609 mount.addChild(child);
612 private static boolean isNextEndDocument(final XMLStreamReader in) throws XMLStreamException {
613 return !in.hasNext() || in.next() == XMLStreamConstants.END_DOCUMENT;
616 private static boolean isAtElement(final XMLStreamReader in) {
617 return in.getEventType() == XMLStreamConstants.START_ELEMENT
618 || in.getEventType() == XMLStreamConstants.END_ELEMENT;
621 private static void skipUnknownNode(final XMLStreamReader in) throws XMLStreamException {
622 // in case when the unknown node and at least one of its descendant nodes have the same name
623 // we cannot properly reach the end just by checking if the current node is an end element and has the same name
624 // as the root unknown element. therefore we ignore the names completely and just track the level of nesting
625 int levelOfNesting = 0;
626 while (in.hasNext()) {
627 // in case there are text characters in an element, we cannot skip them by calling nextTag()
628 // therefore we skip them by calling next(), and then proceed to next element
630 if (!isAtElement(in)) {
633 if (in.isStartElement()) {
637 if (in.isEndElement()) {
638 if (levelOfNesting == 0) {
649 private void setValue(final SimpleNodeDataWithSchema<?> parent, final Object value,
650 final NamespaceContext nsContext) {
651 final DataSchemaNode schema = parent.getSchema();
652 final Object prev = parent.getValue();
653 checkArgument(prev == null, "Node '%s' has already set its value to '%s'", schema.getQName(), prev);
654 parent.setValue(translateValueByType(value, schema, nsContext));
657 private Object translateValueByType(final Object value, final DataSchemaNode node,
658 final NamespaceContext namespaceCtx) {
659 if (node instanceof AnyxmlSchemaNode) {
660 checkArgument(value instanceof Document);
662 * FIXME: Figure out some YANG extension dispatch, which will reuse JSON parsing or XML parsing -
663 * anyxml is not well-defined in JSON.
665 return new DOMSource(((Document) value).getDocumentElement());
667 if (node instanceof AnydataSchemaNode) {
668 checkArgument(value instanceof Document);
669 return new DOMSourceAnydata(new DOMSource(((Document) value).getDocumentElement()));
672 checkArgument(node instanceof TypedDataSchemaNode);
673 checkArgument(value instanceof String);
674 return codecs.codecFor((TypedDataSchemaNode) node, stack).parseValue(namespaceCtx, (String) value);
677 private static AbstractNodeDataWithSchema<?> newEntryNode(final AbstractNodeDataWithSchema<?> parent) {
678 verify(parent instanceof MultipleEntryDataWithSchema, "Unexpected parent %s", parent);
679 return ((MultipleEntryDataWithSchema<?>) parent).newChildEntry();
683 public void close() throws IOException {
689 public void flush() throws IOException {
693 private Optional<QNameModule> resolveXmlNamespace(final String xmlNamespace) {
694 return resolvedNamespaces.computeIfAbsent(xmlNamespace, nsUri -> {
695 final Iterator<? extends Module> it = codecs.getEffectiveModelContext().findModules(XMLNamespace.of(nsUri))
697 return it.hasNext() ? Optional.of(it.next().getQNameModule()) : Optional.empty();
701 private QNameModule rawXmlNamespace(final String xmlNamespace) {
702 return rawNamespaces.computeIfAbsent(xmlNamespace, nsUri -> QNameModule.create(XMLNamespace.of(nsUri)));