2 * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.restconf.nb.rfc8040.streams.listeners;
10 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.DATA_CHANGED_NOTIFICATION_ELEMENT;
11 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.DATA_CHANGE_EVENT_ELEMENT;
12 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.NOTIFICATION_ELEMENT;
13 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.NOTIFICATION_NAMESPACE;
14 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.SAL_REMOTE_NAMESPACE;
15 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationFormatter.XML_OUTPUT_FACTORY;
17 import java.io.IOException;
18 import java.time.Instant;
19 import java.util.Collection;
20 import java.util.stream.Collectors;
21 import javax.xml.stream.XMLStreamException;
22 import javax.xml.stream.XMLStreamWriter;
23 import javax.xml.transform.dom.DOMResult;
24 import javax.xml.xpath.XPathExpressionException;
25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
26 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
27 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
28 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
29 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
30 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
31 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
32 import org.w3c.dom.Document;
33 import org.w3c.dom.Element;
36 * Base formatter for DataTreeCandidates which only handles exporting to a document for filter checking purpose.
38 abstract class DataTreeCandidateFormatter extends EventFormatter<Collection<DataTreeCandidate>> {
39 DataTreeCandidateFormatter() {
43 DataTreeCandidateFormatter(final String xpathFilter) throws XPathExpressionException {
48 final void fillDocument(final Document doc, final EffectiveModelContext schemaContext,
49 final Collection<DataTreeCandidate> input) throws IOException {
50 final Element notificationElement = doc.createElementNS(NOTIFICATION_NAMESPACE, NOTIFICATION_ELEMENT);
51 final Element eventTimeElement = doc.createElement("eventTime");
52 eventTimeElement.setTextContent(toRFC3339(Instant.now()));
53 notificationElement.appendChild(eventTimeElement);
55 final Element notificationEventElement = doc.createElementNS(
56 SAL_REMOTE_NAMESPACE, DATA_CHANGED_NOTIFICATION_ELEMENT);
58 for (DataTreeCandidate candidate : input) {
59 final Element dataChangedElement = doc.createElement(DATA_CHANGE_EVENT_ELEMENT);
61 final Element dataElement = doc.createElement("data");
62 final DOMResult domResult = new DOMResult(dataElement);
63 final XMLStreamWriter writer = XML_OUTPUT_FACTORY.createXMLStreamWriter(domResult);
65 final SchemaPath path = SchemaPath.create(candidate.getRootPath().getPathArguments().stream()
66 .filter(p -> !(p instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates))
67 .map(YangInstanceIdentifier.PathArgument::getNodeType).collect(Collectors.toList()), true);
69 writeCandidate(XMLStreamNormalizedNodeStreamWriter.create(writer, schemaContext,
72 dataChangedElement.appendChild(dataElement);
73 } catch (final XMLStreamException e) {
74 throw new IOException("Failed to write notification content", e);
76 notificationElement.appendChild(notificationEventElement);
78 doc.appendChild(notificationElement);
81 static void writeCandidate(final NormalizedNodeStreamWriter writer, final DataTreeCandidate candidate)
83 if (candidate.getRootNode().getDataAfter().isPresent()) {
84 try (NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(writer)) {
85 nodeWriter.write(candidate.getRootNode().getDataAfter().get());