restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/XmlDataTreeCandidateSerializer.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 static java.util.Objects.requireNonNull;
  11 import static org.opendaylight.restconf.nb.rfc8040.streams.listeners.XMLNotificationFormatter.DATA_CHANGE_EVENT_ELEMENT;
  12
  13 import java.util.Collection;
  14 import javax.xml.stream.XMLStreamException;
  15 import javax.xml.stream.XMLStreamWriter;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  17 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  18 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  19 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  20 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidateNode;
  21 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  22 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
  23
  24 final class XmlDataTreeCandidateSerializer extends AbstractWebsocketSerializer<Exception> {
  25     private final XMLStreamWriter xmlWriter;
  26
  27     XmlDataTreeCandidateSerializer(final EffectiveModelContext context, final XMLStreamWriter xmlWriter) {
  28         super(context);
  29         this.xmlWriter = requireNonNull(xmlWriter);
  30     }
  31
  32     @Override
  33     void serializeData(final Inference parent, final Collection<PathArgument> nodePath,
  34             final DataTreeCandidateNode candidate, final boolean skipData) throws Exception {
  35         NormalizedNodeStreamWriter nodeStreamWriter = XMLStreamNormalizedNodeStreamWriter.create(xmlWriter, parent);
  36         xmlWriter.writeStartElement(DATA_CHANGE_EVENT_ELEMENT);
  37         serializePath(nodePath);
  38
  39         if (!skipData && candidate.getDataAfter().isPresent()) {
  40             xmlWriter.writeStartElement("data");
  41             NormalizedNodeWriter nnWriter = NormalizedNodeWriter.forStreamWriter(nodeStreamWriter);
  42             nnWriter.write(candidate.getDataAfter().get());
  43             nnWriter.flush();
  44
  45             xmlWriter.writeEndElement();
  46         }
  47         serializeOperation(candidate);
  48
  49         xmlWriter.writeEndElement();
  50     }
  51
  52     @Override
  53     public void serializePath(final Collection<PathArgument> pathArguments) throws XMLStreamException {
  54         xmlWriter.writeStartElement("path");
  55         xmlWriter.writeCharacters(convertPath(pathArguments));
  56         xmlWriter.writeEndElement();
  57     }
  58
  59     @Override
  60     public void serializeOperation(final DataTreeCandidateNode candidate) throws XMLStreamException {
  61         xmlWriter.writeStartElement("operation");
  62         xmlWriter.writeCharacters(modificationTypeToOperation(candidate, candidate.getModificationType()));
  63         xmlWriter.writeEndElement();
  64     }
  65 }