restconf/restconf-nb/src/main/java/org/opendaylight/restconf/server/mdsal/streams/notif/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.server.mdsal.streams.notif;
   9
  10 import java.io.IOException;
  11 import java.time.Instant;
  12 import javax.xml.stream.XMLStreamException;
  13 import javax.xml.transform.dom.DOMResult;
  14 import javax.xml.xpath.XPathExpressionException;
  15 import org.opendaylight.mdsal.dom.api.DOMEvent;
  16 import org.opendaylight.mdsal.dom.api.DOMNotification;
  17 import org.opendaylight.restconf.server.spi.EventFormatter;
  18 import org.opendaylight.restconf.server.spi.TextParameters;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.remote.rev140114.CreateNotificationStream;
  20 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  21 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  22 import org.w3c.dom.Document;
  23
  24 abstract class NotificationFormatter extends EventFormatter<DOMNotification> {
  25     private static final String CREATE_NOTIFICATION_STREAM_ELEMENT = CreateNotificationStream.QNAME.getLocalName();
  26     private static final String CREATE_NOTIFICATION_STREAM_NS =
  27         CreateNotificationStream.QNAME.getNamespace().toString();
  28
  29     NotificationFormatter(final TextParameters textParams) {
  30         super(textParams);
  31     }
  32
  33     NotificationFormatter(final TextParameters textParams, final String xpathFilter) throws XPathExpressionException {
  34         super(textParams, xpathFilter);
  35     }
  36
  37     @Override
  38     protected final void fillDocument(final Document doc, final EffectiveModelContext schemaContext,
  39             final DOMNotification input) throws IOException {
  40         final var notificationElement = createNotificationElement(doc,
  41             input instanceof DOMEvent domEvent ? domEvent.getEventInstant() : Instant.now());
  42         // FIXME: what is this really?!
  43         final var notificationEventElement = doc.createElementNS(CREATE_NOTIFICATION_STREAM_NS,
  44             CREATE_NOTIFICATION_STREAM_ELEMENT);
  45         final var dataElement = doc.createElement("notification");
  46         try {
  47             final var writer = XML_OUTPUT_FACTORY.createXMLStreamWriter(new DOMResult(dataElement));
  48             try {
  49                 writeBody(XMLStreamNormalizedNodeStreamWriter.create(writer, schemaContext, input.getType()),
  50                     input.getBody());
  51             } finally {
  52                 writer.close();
  53             }
  54         } catch (final XMLStreamException e) {
  55             throw new IOException("Failed to write notification content", e);
  56         }
  57         notificationElement.appendChild(notificationEventElement);
  58         doc.appendChild(notificationElement);
  59     }
  60 }