restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/NotificationFormatter.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.restconf.nb.rfc8040.streams.listeners;
   9
  10 import java.io.IOException;
  11 import java.time.Instant;
  12 import javax.xml.stream.XMLOutputFactory;
  13 import javax.xml.stream.XMLStreamException;
  14 import javax.xml.stream.XMLStreamWriter;
  15 import javax.xml.transform.dom.DOMResult;
  16 import javax.xml.xpath.XPathExpressionException;
  17 import org.opendaylight.mdsal.dom.api.DOMEvent;
  18 import org.opendaylight.mdsal.dom.api.DOMNotification;
  19 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  20 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  21 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  22 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  23 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  24 import org.w3c.dom.Document;
  25 import org.w3c.dom.Element;
  26
  27 abstract class NotificationFormatter extends EventFormatter<DOMNotification> {
  28     static final XMLOutputFactory XML_OUTPUT_FACTORY;
  29
  30     static {
  31         XML_OUTPUT_FACTORY = XMLOutputFactory.newFactory();
  32         XML_OUTPUT_FACTORY.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, true);
  33     }
  34
  35     NotificationFormatter() {
  36
  37     }
  38
  39     NotificationFormatter(final String xpathFilter) throws XPathExpressionException {
  40         super(xpathFilter);
  41     }
  42
  43     @Override
  44     final void fillDocument(final Document doc, final EffectiveModelContext schemaContext, final DOMNotification input)
  45             throws IOException {
  46         final Element notificationElement = doc.createElementNS("urn:ietf:params:xml:ns:netconf:notification:1.0",
  47                 "notification");
  48         final Element eventTimeElement = doc.createElement("eventTime");
  49         if (input instanceof DOMEvent) {
  50             eventTimeElement.setTextContent(toRFC3339(((DOMEvent) input).getEventInstant()));
  51         } else {
  52             eventTimeElement.setTextContent(toRFC3339(Instant.now()));
  53         }
  54         notificationElement.appendChild(eventTimeElement);
  55
  56         final Element notificationEventElement = doc.createElementNS(
  57                 "urn:opendaylight:params:xml:ns:yang:controller:md:sal:remote", "create-notification-stream");
  58         final Element dataElement = doc.createElement("notification");
  59         final DOMResult result = new DOMResult(dataElement);
  60         try {
  61             final XMLStreamWriter writer = XML_OUTPUT_FACTORY.createXMLStreamWriter(result);
  62             try {
  63                 writeNotificationBody(XMLStreamNormalizedNodeStreamWriter.create(writer, schemaContext,
  64                         input.getType()), input.getBody());
  65             } finally {
  66                 writer.close();
  67             }
  68         } catch (final XMLStreamException e) {
  69             throw new IOException("Failed to write notification content", e);
  70         }
  71         notificationElement.appendChild(notificationEventElement);
  72         doc.appendChild(notificationElement);
  73     }
  74
  75     static void writeNotificationBody(final NormalizedNodeStreamWriter writer, final ContainerNode body)
  76             throws IOException {
  77         try (NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(writer)) {
  78             nodeWriter.write(body);
  79         }
  80     }
  81 }