netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/util/NetconfMessageTransformUtil.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. 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.netconf.sal.connect.netconf.util;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.ImmutableList;
  13 import com.google.common.collect.ImmutableMap;
  14 import java.io.IOException;
  15 import java.net.URI;
  16 import java.text.ParseException;
  17 import java.text.SimpleDateFormat;
  18 import java.util.AbstractMap;
  19 import java.util.Collection;
  20 import java.util.Collections;
  21 import java.util.Date;
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.Map.Entry;
  25 import javax.xml.stream.XMLStreamException;
  26 import javax.xml.stream.XMLStreamWriter;
  27 import javax.xml.transform.dom.DOMResult;
  28 import javax.xml.transform.dom.DOMSource;
  29 import org.opendaylight.controller.config.util.xml.DocumentedException;
  30 import org.opendaylight.controller.config.util.xml.XmlElement;
  31 import org.opendaylight.controller.config.util.xml.XmlUtil;
  32 import org.opendaylight.netconf.api.NetconfDocumentedException;
  33 import org.opendaylight.netconf.api.NetconfMessage;
  34 import org.opendaylight.netconf.notifications.NetconfNotification;
  35 import org.opendaylight.netconf.sal.connect.util.MessageCounter;
  36 import org.opendaylight.netconf.util.NetconfUtil;
  37 import org.opendaylight.netconf.util.messages.NetconfMessageUtil;
  38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.base._1._0.rev110601.edit.config.input.EditContent;
  39 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netconf.notification._1._0.rev080714.CreateSubscriptionInput;
  40 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState;
  41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.notifications.rev120206.NetconfCapabilityChange;
  42 import org.opendaylight.yangtools.yang.common.QName;
  43 import org.opendaylight.yangtools.yang.common.RpcError;
  44 import org.opendaylight.yangtools.yang.common.RpcError.ErrorSeverity;
  45 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  46 import org.opendaylight.yangtools.yang.data.api.ModifyAction;
  47 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  48 import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
  49 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  50 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  51 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  52 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  53 import org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  54 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  55 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  56 import org.opendaylight.yangtools.yang.data.impl.schema.SchemaOrderedNormalizedNodeWriter;
  57 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeAttrBuilder;
  58 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  59 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  60 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  61 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  62 import org.slf4j.Logger;
  63 import org.slf4j.LoggerFactory;
  64 import org.w3c.dom.Document;
  65 import org.w3c.dom.Element;
  66
  67 public class NetconfMessageTransformUtil {
  68
  69     private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageTransformUtil.class);
  70
  71     public static final String MESSAGE_ID_PREFIX = "m";
  72     public static final String MESSAGE_ID_ATTR = "message-id";
  73
  74     public static final QName CREATE_SUBSCRIPTION_RPC_QNAME = QName.cachedReference(QName.create(CreateSubscriptionInput.QNAME, "create-subscription"));
  75     private static final String SUBTREE = "subtree";
  76
  77     // Blank document used for creation of new DOM nodes
  78     private static final Document BLANK_DOCUMENT = XmlUtil.newDocument();
  79     public static final String EVENT_TIME = "eventTime";
  80
  81     private NetconfMessageTransformUtil() {}
  82
  83     public static final QName IETF_NETCONF_MONITORING = QName.create(NetconfState.QNAME, "ietf-netconf-monitoring");
  84     public static final QName GET_DATA_QNAME = QName.create(IETF_NETCONF_MONITORING, "data");
  85     public static final QName GET_SCHEMA_QNAME = QName.create(IETF_NETCONF_MONITORING, "get-schema");
  86     public static final QName IETF_NETCONF_MONITORING_SCHEMA_FORMAT = QName.create(IETF_NETCONF_MONITORING, "format");
  87     public static final QName IETF_NETCONF_MONITORING_SCHEMA_LOCATION = QName.create(IETF_NETCONF_MONITORING, "location");
  88     public static final QName IETF_NETCONF_MONITORING_SCHEMA_IDENTIFIER = QName.create(IETF_NETCONF_MONITORING, "identifier");
  89     public static final QName IETF_NETCONF_MONITORING_SCHEMA_VERSION = QName.create(IETF_NETCONF_MONITORING, "version");
  90     public static final QName IETF_NETCONF_MONITORING_SCHEMA_NAMESPACE = QName.create(IETF_NETCONF_MONITORING, "namespace");
  91
  92     public static final QName IETF_NETCONF_NOTIFICATIONS = QName.create(NetconfCapabilityChange.QNAME, "ietf-netconf-notifications");
  93
  94     public static final QName NETCONF_QNAME = QName.cachedReference(QName.create("urn:ietf:params:xml:ns:netconf:base:1.0", "2011-06-01", "netconf"));
  95     public static final URI NETCONF_URI = NETCONF_QNAME.getNamespace();
  96
  97     public static final QName NETCONF_DATA_QNAME = QName.create(NETCONF_QNAME, "data");
  98     public static final QName NETCONF_RPC_REPLY_QNAME = QName.create(NETCONF_QNAME, "rpc-reply");
  99     public static final QName NETCONF_OK_QNAME = QName.create(NETCONF_QNAME, "ok");
 100     public static final QName NETCONF_ERROR_OPTION_QNAME = QName.create(NETCONF_QNAME, "error-option");
 101     public static final QName NETCONF_RUNNING_QNAME = QName.create(NETCONF_QNAME, "running");
 102     public static final QName NETCONF_SOURCE_QNAME = QName.create(NETCONF_QNAME, "source");
 103     public static final QName NETCONF_CANDIDATE_QNAME = QName.create(NETCONF_QNAME, "candidate");
 104     public static final QName NETCONF_TARGET_QNAME = QName.create(NETCONF_QNAME, "target");
 105     public static final QName NETCONF_CONFIG_QNAME = QName.create(NETCONF_QNAME, "config");
 106     public static final QName NETCONF_COMMIT_QNAME = QName.create(NETCONF_QNAME, "commit");
 107     public static final QName NETCONF_VALIDATE_QNAME = QName.create(NETCONF_QNAME, "validate");
 108     public static final QName NETCONF_COPY_CONFIG_QNAME = QName.create(NETCONF_QNAME, "copy-config");
 109     public static final QName NETCONF_OPERATION_QNAME = QName.create(NETCONF_QNAME, "operation");
 110     public static final QName NETCONF_DEFAULT_OPERATION_QNAME = QName.create(NETCONF_OPERATION_QNAME, "default-operation");
 111     public static final QName NETCONF_EDIT_CONFIG_QNAME = QName.create(NETCONF_QNAME, "edit-config");
 112     public static final QName NETCONF_GET_CONFIG_QNAME = QName.create(NETCONF_QNAME, "get-config");
 113     public static final QName NETCONF_DISCARD_CHANGES_QNAME = QName.create(NETCONF_QNAME, "discard-changes");
 114     public static final QName NETCONF_TYPE_QNAME = QName.create(NETCONF_QNAME, "type");
 115     public static final QName NETCONF_FILTER_QNAME = QName.create(NETCONF_QNAME, "filter");
 116     public static final QName NETCONF_GET_QNAME = QName.create(NETCONF_QNAME, "get");
 117     public static final QName NETCONF_RPC_QNAME = QName.create(NETCONF_QNAME, "rpc");
 118
 119     public static final URI NETCONF_ROLLBACK_ON_ERROR_URI = URI
 120             .create("urn:ietf:params:netconf:capability:rollback-on-error:1.0");
 121     public static final String ROLLBACK_ON_ERROR_OPTION = "rollback-on-error";
 122
 123     public static final URI NETCONF_CANDIDATE_URI = URI
 124             .create("urn:ietf:params:netconf:capability:candidate:1.0");
 125
 126     public static final URI NETCONF_NOTIFICATONS_URI = URI
 127             .create("urn:ietf:params:netconf:capability:notification:1.0");
 128
 129     public static final URI NETCONF_RUNNING_WRITABLE_URI = URI
 130             .create("urn:ietf:params:netconf:capability:writable-running:1.0");
 131
 132     public static final QName NETCONF_LOCK_QNAME = QName.create(NETCONF_QNAME, "lock");
 133     public static final QName NETCONF_UNLOCK_QNAME = QName.create(NETCONF_QNAME, "unlock");
 134
 135     // Discard changes message
 136     public static final ContainerNode DISCARD_CHANGES_RPC_CONTENT =
 137             Builders.containerBuilder().withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NETCONF_DISCARD_CHANGES_QNAME)).build();
 138
 139     // Commit changes message
 140     public static final ContainerNode COMMIT_RPC_CONTENT =
 141             Builders.containerBuilder().withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NETCONF_COMMIT_QNAME)).build();
 142
 143     // Get message
 144     public static final ContainerNode GET_RPC_CONTENT =
 145             Builders.containerBuilder().withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NETCONF_GET_QNAME)).build();
 146
 147     // Create-subscription changes message
 148     public static final ContainerNode CREATE_SUBSCRIPTION_RPC_CONTENT =
 149             Builders.containerBuilder().withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(CREATE_SUBSCRIPTION_RPC_QNAME)).build();
 150
 151     public static final DataContainerChild<?, ?> EMPTY_FILTER;
 152
 153     static {
 154         final NormalizedNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder = Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 155         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 156
 157         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(), Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 158         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(), NETCONF_TYPE_QNAME.getLocalName(), "subtree");
 159
 160         anyXmlBuilder.withValue(new DOMSource(element));
 161
 162         EMPTY_FILTER = anyXmlBuilder.build();
 163     }
 164
 165     public static DataContainerChild<?, ?> toFilterStructure(final YangInstanceIdentifier identifier, final SchemaContext ctx) {
 166         final NormalizedNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder = Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 167         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 168
 169         final NormalizedNode<?, ?> filterContent = ImmutableNodes.fromInstanceId(ctx, identifier);
 170
 171         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(), Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 172         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(), NETCONF_TYPE_QNAME.getLocalName(), "subtree");
 173
 174         try {
 175             NetconfUtil.writeNormalizedNode(filterContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 176         } catch (IOException | XMLStreamException e) {
 177             throw new IllegalStateException("Unable to serialize filter element for path " + identifier, e);
 178         }
 179         anyXmlBuilder.withValue(new DOMSource(element));
 180
 181         return anyXmlBuilder.build();
 182     }
 183
 184     public static void checkValidReply(final NetconfMessage input, final NetconfMessage output)
 185             throws NetconfDocumentedException {
 186         final String inputMsgId = input.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 187         final String outputMsgId = output.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 188
 189         if(inputMsgId.equals(outputMsgId) == false) {
 190             final Map<String,String> errorInfo = ImmutableMap.<String,String>builder()
 191                     .put( "actual-message-id", outputMsgId )
 192                     .put( "expected-message-id", inputMsgId )
 193                     .build();
 194
 195             throw new NetconfDocumentedException( "Response message contained unknown \"message-id\"",
 196                     null, NetconfDocumentedException.ErrorType.protocol,
 197                     NetconfDocumentedException.ErrorTag.bad_attribute,
 198                     NetconfDocumentedException.ErrorSeverity.error, errorInfo );
 199         }
 200     }
 201
 202     public static void checkSuccessReply(final NetconfMessage output) throws NetconfDocumentedException {
 203         if(NetconfMessageUtil.isErrorMessage(output)) {
 204             throw NetconfDocumentedException.fromXMLDocument(output.getDocument());
 205         }
 206     }
 207
 208     public static RpcError toRpcError( final NetconfDocumentedException ex ) {
 209         final StringBuilder infoBuilder = new StringBuilder();
 210         final Map<String, String> errorInfo = ex.getErrorInfo();
 211         if(errorInfo != null) {
 212             for( final Entry<String,String> e: errorInfo.entrySet() ) {
 213                 infoBuilder.append( '<' ).append( e.getKey() ).append( '>' ).append( e.getValue() )
 214                 .append( "</" ).append( e.getKey() ).append( '>' );
 215
 216             }
 217         }
 218
 219         final ErrorSeverity severity = toRpcErrorSeverity( ex.getErrorSeverity() );
 220         return severity == ErrorSeverity.ERROR ?
 221                 RpcResultBuilder.newError(
 222                         toRpcErrorType( ex.getErrorType() ), ex.getErrorTag().getTagValue(),
 223                         ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause() ) :
 224                             RpcResultBuilder.newWarning(
 225                                     toRpcErrorType( ex.getErrorType() ), ex.getErrorTag().getTagValue(),
 226                                     ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause() );
 227     }
 228
 229     private static ErrorSeverity toRpcErrorSeverity( final NetconfDocumentedException.ErrorSeverity severity ) {
 230         switch (severity) {
 231         case warning:
 232             return RpcError.ErrorSeverity.WARNING;
 233         default:
 234             return RpcError.ErrorSeverity.ERROR;
 235         }
 236     }
 237
 238     private static RpcError.ErrorType toRpcErrorType(final NetconfDocumentedException.ErrorType type) {
 239         switch (type) {
 240         case protocol:
 241             return RpcError.ErrorType.PROTOCOL;
 242         case rpc:
 243             return RpcError.ErrorType.RPC;
 244         case transport:
 245             return RpcError.ErrorType.TRANSPORT;
 246         default:
 247             return RpcError.ErrorType.APPLICATION;
 248         }
 249     }
 250
 251     public static YangInstanceIdentifier.NodeIdentifier toId(final YangInstanceIdentifier.PathArgument qname) {
 252         return toId(qname.getNodeType());
 253     }
 254
 255     public static YangInstanceIdentifier.NodeIdentifier toId(final QName nodeType) {
 256         return new YangInstanceIdentifier.NodeIdentifier(nodeType);
 257     }
 258
 259     public static Element getDataSubtree(final Document doc) {
 260         return (Element) doc.getElementsByTagNameNS(NETCONF_URI.toString(), "data").item(0);
 261     }
 262
 263     public static boolean isDataRetrievalOperation(final QName rpc) {
 264         return NETCONF_URI.equals(rpc.getNamespace())
 265                 && (NETCONF_GET_CONFIG_QNAME.getLocalName().equals(rpc.getLocalName())
 266                 || NETCONF_GET_QNAME.getLocalName().equals(rpc.getLocalName()));
 267     }
 268
 269     public static ContainerSchemaNode createSchemaForDataRead(final SchemaContext schemaContext) {
 270         return new NodeContainerProxy(NETCONF_DATA_QNAME, schemaContext.getChildNodes());
 271     }
 272
 273     public static ContainerSchemaNode createSchemaForNotification(final NotificationDefinition next) {
 274         return new NodeContainerProxy(next.getQName(), next.getChildNodes(), next.getAvailableAugmentations());
 275     }
 276
 277     public static ContainerNode wrap(final QName name, final DataContainerChild<?, ?>... node) {
 278         return Builders.containerBuilder().withNodeIdentifier(toId(name)).withValue(ImmutableList.copyOf(node)).build();
 279     }
 280
 281     public static AnyXmlNode createEditConfigAnyxml(final SchemaContext ctx, final YangInstanceIdentifier dataPath,
 282                                                                      final Optional<ModifyAction> operation, final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 283         final NormalizedNode<?, ?> configContent;
 284
 285         if (dataPath.isEmpty()) {
 286             Preconditions.checkArgument(lastChildOverride.isPresent(), "Data has to be present when creating structure for top level element");
 287             Preconditions.checkArgument(lastChildOverride.get() instanceof DataContainerChild<?, ?>,
 288                     "Data has to be either container or a list node when creating structure for top level element, but was: %s", lastChildOverride.get());
 289             configContent = lastChildOverride.get();
 290         } else {
 291             final Entry<QName, ModifyAction> modifyOperation =
 292                     operation.isPresent() ? new AbstractMap.SimpleEntry<>(NETCONF_OPERATION_QNAME, operation.get()) : null;
 293             configContent = ImmutableNodes.fromInstanceId(ctx, dataPath, lastChildOverride, Optional.fromNullable(modifyOperation));
 294         }
 295
 296         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_CONFIG_QNAME.getLocalName(), Optional.of(NETCONF_CONFIG_QNAME.getNamespace().toString()));
 297         try {
 298             NetconfUtil.writeNormalizedNode(configContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 299         } catch (IOException | XMLStreamException e) {
 300             throw new IllegalStateException("Unable to serialize edit config content element for path " + dataPath, e);
 301         }
 302         final DOMSource value = new DOMSource(element);
 303
 304         return Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_CONFIG_QNAME)).withValue(value).build();
 305     }
 306
 307     public static DataContainerChild<?, ?> createEditConfigStructure(final SchemaContext ctx, final YangInstanceIdentifier dataPath,
 308                                                                      final Optional<ModifyAction> operation, final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 309         return Builders.choiceBuilder().withNodeIdentifier(toId(EditContent.QNAME))
 310                 .withChild(createEditConfigAnyxml(ctx, dataPath, operation, lastChildOverride)).build();
 311     }
 312
 313     public static SchemaPath toPath(final QName rpc) {
 314         return SchemaPath.create(true, rpc);
 315     }
 316
 317     private static final ThreadLocal<SimpleDateFormat> EVENT_TIME_FORMAT = new ThreadLocal<SimpleDateFormat>() {
 318         @Override
 319         protected SimpleDateFormat initialValue() {
 320
 321             final SimpleDateFormat withMillis = new SimpleDateFormat(
 322                     NetconfNotification.RFC3339_DATE_FORMAT_WITH_MILLIS_BLUEPRINT);
 323
 324             return new SimpleDateFormat(NetconfNotification.RFC3339_DATE_FORMAT_BLUEPRINT) {
 325                 private static final long serialVersionUID = 1L;
 326
 327                 @Override public Date parse(final String source) throws ParseException {
 328                     try {
 329                         return super.parse(source);
 330                     } catch (ParseException e) {
 331                         // In case of failure, try to parse with milliseconds
 332                         return withMillis.parse(source);
 333                     }
 334                 }
 335             };
 336         }
 337
 338         @Override
 339         public void set(final SimpleDateFormat value) {
 340             throw new UnsupportedOperationException();
 341         }
 342     };
 343
 344     public static Map.Entry<Date, XmlElement> stripNotification(final NetconfMessage message) {
 345         final XmlElement xmlElement = XmlElement.fromDomDocument(message.getDocument());
 346         final List<XmlElement> childElements = xmlElement.getChildElements();
 347         Preconditions.checkArgument(childElements.size() == 2, "Unable to parse notification %s, unexpected format.\nExpected 2 childElements," +
 348                 " actual childElements size is %s", message, childElements.size());
 349
 350         final XmlElement eventTimeElement;
 351         final XmlElement notificationElement;
 352
 353         if (childElements.get(0).getName().equals(EVENT_TIME)) {
 354             eventTimeElement = childElements.get(0);
 355             notificationElement = childElements.get(1);
 356         }
 357         else if(childElements.get(1).getName().equals(EVENT_TIME)) {
 358             eventTimeElement = childElements.get(1);
 359             notificationElement = childElements.get(0);
 360         } else {
 361             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 362         }
 363
 364         try {
 365             return new AbstractMap.SimpleEntry<>(EVENT_TIME_FORMAT.get().parse(eventTimeElement.getTextContent()), notificationElement);
 366         } catch (DocumentedException e) {
 367             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 368         } catch (ParseException e) {
 369             LOG.warn("Unable to parse event time from {}. Setting time to {}", eventTimeElement, NetconfNotification.UNKNOWN_EVENT_TIME, e);
 370             return new AbstractMap.SimpleEntry<>(NetconfNotification.UNKNOWN_EVENT_TIME, notificationElement);
 371         }
 372     }
 373
 374     public static DOMResult prepareDomResultForRpcRequest(final QName rpcQName, final MessageCounter counter) {
 375         final Document document = XmlUtil.newDocument();
 376         final Element rpcNS =
 377                 document.createElementNS(NETCONF_RPC_QNAME.getNamespace().toString(), NETCONF_RPC_QNAME.getLocalName());
 378         // set msg id
 379         rpcNS.setAttribute(MESSAGE_ID_ATTR, counter.getNewMessageId(MESSAGE_ID_PREFIX));
 380         final Element elementNS = document.createElementNS(rpcQName.getNamespace().toString(), rpcQName.getLocalName());
 381         rpcNS.appendChild(elementNS);
 382         document.appendChild(rpcNS);
 383         return new DOMResult(elementNS);
 384     }
 385
 386     public static void writeNormalizedRpc(final ContainerNode normalized, final DOMResult result,
 387                                           final SchemaPath schemaPath, final SchemaContext baseNetconfCtx) throws IOException, XMLStreamException {
 388         final XMLStreamWriter writer = NetconfUtil.XML_FACTORY.createXMLStreamWriter(result);
 389         try {
 390             try (final NormalizedNodeStreamWriter normalizedNodeStreamWriter =
 391                     XMLStreamNormalizedNodeStreamWriter.create(writer, baseNetconfCtx, schemaPath)) {
 392                 try (final SchemaOrderedNormalizedNodeWriter normalizedNodeWriter =
 393                         new SchemaOrderedNormalizedNodeWriter(normalizedNodeStreamWriter, baseNetconfCtx, schemaPath)) {
 394                     Collection<DataContainerChild<?, ?>> value = normalized.getValue();
 395                     normalizedNodeWriter.write(value);
 396                     normalizedNodeWriter.flush();
 397                 }
 398             }
 399         } finally {
 400             try {
 401                 writer.close();
 402             } catch (final Exception e) {
 403                LOG.warn("Unable to close resource properly", e);
 404             }
 405         }
 406     }
 407 }