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.server.mdsal.streams.dtcl;
10 import java.io.IOException;
11 import java.time.Instant;
12 import java.util.List;
13 import javax.xml.stream.XMLStreamException;
14 import javax.xml.transform.dom.DOMResult;
15 import javax.xml.xpath.XPathExpressionException;
16 import org.opendaylight.restconf.server.spi.EventFormatter;
17 import org.opendaylight.restconf.server.spi.TextParameters;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.remote.rev140114.DataChangedNotification;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.remote.rev140114.data.changed.notification.DataChangeEvent;
20 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
21 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
22 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
23 import org.w3c.dom.Document;
26 * Base formatter for DataTreeCandidates which only handles exporting to a document for filter checking purpose.
28 abstract class DataTreeCandidateFormatter extends EventFormatter<List<DataTreeCandidate>> {
29 private static final String DATA_CHANGE_EVENT_ELEMENT = DataChangeEvent.QNAME.getLocalName();
30 static final String DATA_CHANGED_NOTIFICATION_ELEMENT = DataChangedNotification.QNAME.getLocalName();
31 static final String DATA_CHANGED_NOTIFICATION_NS = DataChangedNotification.QNAME.getNamespace().toString();
33 DataTreeCandidateFormatter(final TextParameters textParams) {
37 DataTreeCandidateFormatter(final TextParameters textParams, final String xpathFilter)
38 throws XPathExpressionException {
39 super(textParams, xpathFilter);
43 protected final void fillDocument(final Document doc, final EffectiveModelContext schemaContext,
44 final List<DataTreeCandidate> input) throws IOException {
45 final var notificationElement = createNotificationElement(doc, Instant.now());
46 final var notificationEventElement = doc.createElementNS(DATA_CHANGED_NOTIFICATION_NS,
47 DATA_CHANGED_NOTIFICATION_ELEMENT);
49 for (var candidate : input) {
50 final var dataChangedElement = doc.createElement(DATA_CHANGE_EVENT_ELEMENT);
52 final var dataElement = doc.createElement("data");
53 final var dataAfter = candidate.getRootNode().dataAfter();
54 if (dataAfter != null) {
55 try (var writer = XMLStreamNormalizedNodeStreamWriter.create(
56 XML_OUTPUT_FACTORY.createXMLStreamWriter(new DOMResult(dataElement)), schemaContext,
57 candidate.getRootPath())) {
58 writeBody(writer, dataAfter);
61 dataChangedElement.appendChild(dataElement);
62 } catch (XMLStreamException e) {
63 throw new IOException("Failed to write notification content", e);
65 notificationElement.appendChild(notificationEventElement);
67 doc.appendChild(notificationElement);