restconf/restconf-common/src/main/java/org/opendaylight/restconf/common/serializer/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.common.serializer;
   9
  10 import java.util.Collection;
  11 import java.util.stream.Collectors;
  12 import javax.xml.stream.XMLStreamException;
  13 import javax.xml.stream.XMLStreamWriter;
  14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  16 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  17 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  19 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  20 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  21 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  22
  23 public class XmlDataTreeCandidateSerializer extends AbstractWebsocketSerializer<Exception> {
  24
  25     private final EffectiveModelContext context;
  26     private final XMLStreamWriter xmlWriter;
  27
  28     public XmlDataTreeCandidateSerializer(EffectiveModelContext context, XMLStreamWriter xmlWriter) {
  29         this.context = context;
  30         this.xmlWriter = xmlWriter;
  31     }
  32
  33     @Override
  34     void serializeData(Collection<PathArgument> nodePath, DataTreeCandidateNode candidate, boolean skipData)
  35             throws Exception {
  36         final SchemaPath path = SchemaPath.create(nodePath.stream()
  37                 .filter(p -> !(p instanceof YangInstanceIdentifier.NodeIdentifierWithPredicates))
  38                 .map(PathArgument::getNodeType).collect(Collectors.toList()), true);
  39         final NormalizedNodeStreamWriter nodeStreamWriter =
  40                 XMLStreamNormalizedNodeStreamWriter.create(xmlWriter, context, path.getParent());
  41
  42         xmlWriter.writeStartElement("data-changed-event");
  43         serializePath(nodePath);
  44
  45         if (!skipData && candidate.getDataAfter().isPresent()) {
  46             xmlWriter.writeStartElement("data");
  47             NormalizedNodeWriter nnWriter = NormalizedNodeWriter.forStreamWriter(nodeStreamWriter);
  48             nnWriter.write(candidate.getDataAfter().get());
  49             nnWriter.flush();
  50
  51             xmlWriter.writeEndElement();
  52         }
  53         serializeOperation(candidate);
  54
  55         xmlWriter.writeEndElement();
  56     }
  57
  58     @Override
  59     public void serializePath(Collection<PathArgument> pathArguments) throws XMLStreamException {
  60         xmlWriter.writeStartElement("path");
  61         xmlWriter.writeCharacters(convertPath(pathArguments));
  62         xmlWriter.writeEndElement();
  63     }
  64
  65     @Override
  66     public void serializeOperation(DataTreeCandidateNode candidate) throws XMLStreamException {
  67         xmlWriter.writeStartElement("operation");
  68         xmlWriter.writeCharacters(modificationTypeToOperation(candidate, candidate.getModificationType()));
  69         xmlWriter.writeEndElement();
  70     }
  71 }