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.time.format.DateTimeParseException;
  17 import java.util.AbstractMap;
  18 import java.util.Collection;
  19 import java.util.Collections;
  20 import java.util.Date;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.Map.Entry;
  24 import javax.xml.stream.XMLStreamException;
  25 import javax.xml.stream.XMLStreamWriter;
  26 import javax.xml.transform.dom.DOMResult;
  27 import javax.xml.transform.dom.DOMSource;
  28 import org.opendaylight.controller.config.util.xml.DocumentedException;
  29 import org.opendaylight.controller.config.util.xml.XmlElement;
  30 import org.opendaylight.controller.config.util.xml.XmlUtil;
  31 import org.opendaylight.netconf.api.FailedNetconfMessage;
  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.RpcResult;
  46 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  47 import org.opendaylight.yangtools.yang.data.api.ModifyAction;
  48 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  49 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  50 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  51 import org.opendaylight.yangtools.yang.data.api.schema.AnyXmlNode;
  52 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  53 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  54 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  55 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  56 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  57 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  58 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  59 import org.opendaylight.yangtools.yang.data.impl.schema.SchemaOrderedNormalizedNodeWriter;
  60 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeAttrBuilder;
  61 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  62 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  63 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  64 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  65 import org.slf4j.Logger;
  66 import org.slf4j.LoggerFactory;
  67 import org.w3c.dom.Document;
  68 import org.w3c.dom.Element;
  69
  70 public class NetconfMessageTransformUtil {
  71
  72     private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageTransformUtil.class);
  73
  74     public static final String MESSAGE_ID_PREFIX = "m";
  75     public static final String MESSAGE_ID_ATTR = "message-id";
  76
  77     public static final QName CREATE_SUBSCRIPTION_RPC_QNAME =
  78             QName.create(CreateSubscriptionInput.QNAME, "create-subscription").intern();
  79     private static final String SUBTREE = "subtree";
  80
  81     // Blank document used for creation of new DOM nodes
  82     private static final Document BLANK_DOCUMENT = XmlUtil.newDocument();
  83     public static final String EVENT_TIME = "eventTime";
  84
  85     private NetconfMessageTransformUtil() {}
  86
  87     public static final QName IETF_NETCONF_MONITORING =
  88             QName.create(NetconfState.QNAME, "ietf-netconf-monitoring").intern();
  89     public static final QName GET_DATA_QNAME = QName.create(IETF_NETCONF_MONITORING, "data").intern();
  90     public static final QName GET_SCHEMA_QNAME = QName.create(IETF_NETCONF_MONITORING, "get-schema").intern();
  91     public static final QName IETF_NETCONF_MONITORING_SCHEMA_FORMAT =
  92             QName.create(IETF_NETCONF_MONITORING, "format").intern();
  93     public static final QName IETF_NETCONF_MONITORING_SCHEMA_LOCATION =
  94             QName.create(IETF_NETCONF_MONITORING, "location").intern();
  95     public static final QName IETF_NETCONF_MONITORING_SCHEMA_IDENTIFIER =
  96             QName.create(IETF_NETCONF_MONITORING, "identifier").intern();
  97     public static final QName IETF_NETCONF_MONITORING_SCHEMA_VERSION =
  98             QName.create(IETF_NETCONF_MONITORING, "version").intern();
  99     public static final QName IETF_NETCONF_MONITORING_SCHEMA_NAMESPACE =
 100             QName.create(IETF_NETCONF_MONITORING, "namespace").intern();
 101
 102     public static final QName IETF_NETCONF_NOTIFICATIONS =
 103             QName.create(NetconfCapabilityChange.QNAME, "ietf-netconf-notifications").intern();
 104
 105     public static final QName NETCONF_QNAME =
 106             QName.create("urn:ietf:params:xml:ns:netconf:base:1.0", "2011-06-01", "netconf").intern();
 107     public static final URI NETCONF_URI = NETCONF_QNAME.getNamespace();
 108
 109     public static final QName NETCONF_DATA_QNAME = QName.create(NETCONF_QNAME, "data").intern();
 110     public static final QName NETCONF_RPC_REPLY_QNAME = QName.create(NETCONF_QNAME, "rpc-reply").intern();
 111     public static final QName NETCONF_OK_QNAME = QName.create(NETCONF_QNAME, "ok").intern();
 112     public static final QName NETCONF_ERROR_OPTION_QNAME = QName.create(NETCONF_QNAME, "error-option").intern();
 113     public static final QName NETCONF_RUNNING_QNAME = QName.create(NETCONF_QNAME, "running").intern();
 114     public static final QName NETCONF_SOURCE_QNAME = QName.create(NETCONF_QNAME, "source").intern();
 115     public static final QName NETCONF_CANDIDATE_QNAME = QName.create(NETCONF_QNAME, "candidate").intern();
 116     public static final QName NETCONF_TARGET_QNAME = QName.create(NETCONF_QNAME, "target").intern();
 117     public static final QName NETCONF_CONFIG_QNAME = QName.create(NETCONF_QNAME, "config").intern();
 118     public static final QName NETCONF_COMMIT_QNAME = QName.create(NETCONF_QNAME, "commit").intern();
 119     public static final QName NETCONF_VALIDATE_QNAME = QName.create(NETCONF_QNAME, "validate").intern();
 120     public static final QName NETCONF_COPY_CONFIG_QNAME = QName.create(NETCONF_QNAME, "copy-config").intern();
 121     public static final QName NETCONF_OPERATION_QNAME = QName.create(NETCONF_QNAME, "operation").intern();
 122     public static final QName NETCONF_DEFAULT_OPERATION_QNAME =
 123             QName.create(NETCONF_OPERATION_QNAME, "default-operation").intern();
 124     public static final QName NETCONF_EDIT_CONFIG_QNAME = QName.create(NETCONF_QNAME, "edit-config").intern();
 125     public static final QName NETCONF_GET_CONFIG_QNAME = QName.create(NETCONF_QNAME, "get-config");
 126     public static final QName NETCONF_DISCARD_CHANGES_QNAME = QName.create(NETCONF_QNAME, "discard-changes");
 127     public static final QName NETCONF_TYPE_QNAME = QName.create(NETCONF_QNAME, "type").intern();
 128     public static final QName NETCONF_FILTER_QNAME = QName.create(NETCONF_QNAME, "filter").intern();
 129     public static final QName NETCONF_GET_QNAME = QName.create(NETCONF_QNAME, "get").intern();
 130     public static final QName NETCONF_RPC_QNAME = QName.create(NETCONF_QNAME, "rpc").intern();
 131
 132     public static final URI NETCONF_ROLLBACK_ON_ERROR_URI = URI
 133             .create("urn:ietf:params:netconf:capability:rollback-on-error:1.0");
 134     public static final String ROLLBACK_ON_ERROR_OPTION = "rollback-on-error";
 135
 136     public static final URI NETCONF_CANDIDATE_URI = URI
 137             .create("urn:ietf:params:netconf:capability:candidate:1.0");
 138
 139     public static final URI NETCONF_NOTIFICATONS_URI = URI
 140             .create("urn:ietf:params:netconf:capability:notification:1.0");
 141
 142     public static final URI NETCONF_RUNNING_WRITABLE_URI = URI
 143             .create("urn:ietf:params:netconf:capability:writable-running:1.0");
 144
 145     public static final QName NETCONF_LOCK_QNAME = QName.create(NETCONF_QNAME, "lock").intern();
 146     public static final QName NETCONF_UNLOCK_QNAME = QName.create(NETCONF_QNAME, "unlock").intern();
 147
 148     // Discard changes message
 149     public static final ContainerNode DISCARD_CHANGES_RPC_CONTENT =
 150             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_DISCARD_CHANGES_QNAME)).build();
 151
 152     // Commit changes message
 153     public static final ContainerNode COMMIT_RPC_CONTENT =
 154             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_COMMIT_QNAME)).build();
 155
 156     // Get message
 157     public static final ContainerNode GET_RPC_CONTENT =
 158             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_GET_QNAME)).build();
 159
 160     // Create-subscription changes message
 161     public static final ContainerNode CREATE_SUBSCRIPTION_RPC_CONTENT =
 162             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(CREATE_SUBSCRIPTION_RPC_QNAME)).build();
 163
 164     public static final DataContainerChild<?, ?> EMPTY_FILTER;
 165
 166     static {
 167         final NormalizedNodeAttrBuilder<NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder =
 168                 Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 169         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 170
 171         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(),
 172                 Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 173         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(),
 174                 NETCONF_TYPE_QNAME.getLocalName(), "subtree");
 175
 176         anyXmlBuilder.withValue(new DOMSource(element));
 177
 178         EMPTY_FILTER = anyXmlBuilder.build();
 179     }
 180
 181     public static DataContainerChild<?, ?> toFilterStructure(final YangInstanceIdentifier identifier,
 182                                                              final SchemaContext ctx) {
 183         final NormalizedNodeAttrBuilder<NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder =
 184                 Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 185         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 186
 187         final NormalizedNode<?, ?> filterContent = ImmutableNodes.fromInstanceId(ctx, identifier);
 188
 189         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(),
 190                 Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 191         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(), NETCONF_TYPE_QNAME.getLocalName(),
 192                 "subtree");
 193
 194         try {
 195             NetconfUtil.writeNormalizedNode(filterContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 196         } catch (IOException | XMLStreamException e) {
 197             throw new IllegalStateException("Unable to serialize filter element for path " + identifier, e);
 198         }
 199         anyXmlBuilder.withValue(new DOMSource(element));
 200
 201         return anyXmlBuilder.build();
 202     }
 203
 204     public static void checkValidReply(final NetconfMessage input, final NetconfMessage output)
 205             throws NetconfDocumentedException {
 206         final String inputMsgId = input.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 207         final String outputMsgId = output.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 208
 209         if (inputMsgId.equals(outputMsgId) == false) {
 210             final Map<String, String> errorInfo = ImmutableMap.<String, String>builder()
 211                     .put("actual-message-id", outputMsgId)
 212                     .put("expected-message-id", inputMsgId)
 213                     .build();
 214
 215             throw new NetconfDocumentedException("Response message contained unknown \"message-id\"",
 216                     null, NetconfDocumentedException.ErrorType.PROTOCOL,
 217                     NetconfDocumentedException.ErrorTag.BAD_ATTRIBUTE,
 218                     NetconfDocumentedException.ErrorSeverity.ERROR, errorInfo);
 219         }
 220     }
 221
 222     public static void checkSuccessReply(final NetconfMessage output) throws NetconfDocumentedException {
 223         if (NetconfMessageUtil.isErrorMessage(output)) {
 224             throw NetconfDocumentedException.fromXMLDocument(output.getDocument());
 225         }
 226     }
 227
 228     public static RpcError toRpcError(final NetconfDocumentedException ex) {
 229         final StringBuilder infoBuilder = new StringBuilder();
 230         final Map<String, String> errorInfo = ex.getErrorInfo();
 231         if (errorInfo != null) {
 232             for (final Entry<String, String> e : errorInfo.entrySet()) {
 233                 infoBuilder.append('<').append(e.getKey()).append('>').append(e.getValue())
 234                         .append("</").append(e.getKey()).append('>');
 235
 236             }
 237         }
 238
 239         final ErrorSeverity severity = toRpcErrorSeverity(ex.getErrorSeverity());
 240         return severity == ErrorSeverity.ERROR
 241                 ? RpcResultBuilder.newError(toRpcErrorType(ex.getErrorType()), ex.getErrorTag().getTagValue(),
 242                         ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause())
 243                 : RpcResultBuilder.newWarning(
 244                         toRpcErrorType(ex.getErrorType()), ex.getErrorTag().getTagValue(),
 245                         ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause());
 246     }
 247
 248     private static ErrorSeverity toRpcErrorSeverity(final NetconfDocumentedException.ErrorSeverity severity) {
 249         switch (severity) {
 250             case WARNING:
 251                 return RpcError.ErrorSeverity.WARNING;
 252             default:
 253                 return RpcError.ErrorSeverity.ERROR;
 254         }
 255     }
 256
 257     private static RpcError.ErrorType toRpcErrorType(final NetconfDocumentedException.ErrorType type) {
 258         switch (type) {
 259             case PROTOCOL:
 260                 return RpcError.ErrorType.PROTOCOL;
 261             case RPC:
 262                 return RpcError.ErrorType.RPC;
 263             case TRANSPORT:
 264                 return RpcError.ErrorType.TRANSPORT;
 265             default:
 266                 return RpcError.ErrorType.APPLICATION;
 267         }
 268     }
 269
 270     public static NodeIdentifier toId(final PathArgument qname) {
 271         return toId(qname.getNodeType());
 272     }
 273
 274     public static NodeIdentifier toId(final QName nodeType) {
 275         return new NodeIdentifier(nodeType);
 276     }
 277
 278     public static Element getDataSubtree(final Document doc) {
 279         return (Element) doc.getElementsByTagNameNS(NETCONF_URI.toString(), "data").item(0);
 280     }
 281
 282     public static boolean isDataRetrievalOperation(final QName rpc) {
 283         return NETCONF_URI.equals(rpc.getNamespace())
 284                 && (NETCONF_GET_CONFIG_QNAME.getLocalName().equals(rpc.getLocalName())
 285                 || NETCONF_GET_QNAME.getLocalName().equals(rpc.getLocalName()));
 286     }
 287
 288     public static ContainerSchemaNode createSchemaForDataRead(final SchemaContext schemaContext) {
 289         return new NodeContainerProxy(NETCONF_DATA_QNAME, schemaContext.getChildNodes());
 290     }
 291
 292     public static ContainerSchemaNode createSchemaForNotification(final NotificationDefinition next) {
 293         return new NodeContainerProxy(next.getQName(), next.getChildNodes(), next.getAvailableAugmentations());
 294     }
 295
 296     public static ContainerNode wrap(final QName name, final DataContainerChild<?, ?>... node) {
 297         return Builders.containerBuilder().withNodeIdentifier(toId(name)).withValue(ImmutableList.copyOf(node)).build();
 298     }
 299
 300     public static AnyXmlNode createEditConfigAnyxml(
 301             final SchemaContext ctx, final YangInstanceIdentifier dataPath, final Optional<ModifyAction> operation,
 302             final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 303         final NormalizedNode<?, ?> configContent;
 304
 305         if (dataPath.isEmpty()) {
 306             Preconditions.checkArgument(lastChildOverride.isPresent(),
 307                     "Data has to be present when creating structure for top level element");
 308             Preconditions.checkArgument(lastChildOverride.get() instanceof DataContainerChild<?, ?>,
 309                     "Data has to be either container or a list node when creating structure for top level element, "
 310                             + "but was: %s", lastChildOverride.get());
 311             configContent = lastChildOverride.get();
 312         } else {
 313             final Entry<QName, ModifyAction> modifyOperation = operation.isPresent()
 314                     ? new AbstractMap.SimpleEntry<>(NETCONF_OPERATION_QNAME, operation.get()) : null;
 315             configContent = ImmutableNodes
 316                     .fromInstanceId(ctx, dataPath, lastChildOverride, Optional.fromNullable(modifyOperation));
 317         }
 318
 319         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_CONFIG_QNAME.getLocalName(),
 320                 Optional.of(NETCONF_CONFIG_QNAME.getNamespace().toString()));
 321         try {
 322             NetconfUtil.writeNormalizedNode(configContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 323         } catch (IOException | XMLStreamException e) {
 324             throw new IllegalStateException("Unable to serialize edit config content element for path " + dataPath, e);
 325         }
 326         final DOMSource value = new DOMSource(element);
 327
 328         return Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_CONFIG_QNAME)).withValue(value).build();
 329     }
 330
 331     public static DataContainerChild<?, ?> createEditConfigStructure(
 332             final SchemaContext ctx, final YangInstanceIdentifier dataPath, final Optional<ModifyAction> operation,
 333             final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 334         return Builders.choiceBuilder().withNodeIdentifier(toId(EditContent.QNAME))
 335                 .withChild(createEditConfigAnyxml(ctx, dataPath, operation, lastChildOverride)).build();
 336     }
 337
 338     public static SchemaPath toPath(final QName rpc) {
 339         return SchemaPath.create(true, rpc);
 340     }
 341
 342     public static Map.Entry<Date, XmlElement> stripNotification(final NetconfMessage message) {
 343         final XmlElement xmlElement = XmlElement.fromDomDocument(message.getDocument());
 344         final List<XmlElement> childElements = xmlElement.getChildElements();
 345         Preconditions.checkArgument(childElements.size() == 2, "Unable to parse notification %s, unexpected format."
 346                 + "\nExpected 2 childElements, actual childElements size is %s", message, childElements.size());
 347
 348         final XmlElement eventTimeElement;
 349         final XmlElement notificationElement;
 350
 351         if (childElements.get(0).getName().equals(EVENT_TIME)) {
 352             eventTimeElement = childElements.get(0);
 353             notificationElement = childElements.get(1);
 354         } else if (childElements.get(1).getName().equals(EVENT_TIME)) {
 355             eventTimeElement = childElements.get(1);
 356             notificationElement = childElements.get(0);
 357         } else {
 358             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 359         }
 360
 361         try {
 362             return new AbstractMap.SimpleEntry<>(
 363                     NetconfNotification.RFC3339_DATE_PARSER.apply(eventTimeElement.getTextContent()),
 364                     notificationElement);
 365         } catch (final DocumentedException e) {
 366             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 367         } catch (final DateTimeParseException e) {
 368             LOG.warn("Unable to parse event time from {}. Setting time to {}", eventTimeElement,
 369                     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     @SuppressWarnings("checkstyle:IllegalCatch")
 387     public static void writeNormalizedRpc(final ContainerNode normalized, final DOMResult result,
 388                                           final SchemaPath schemaPath,
 389                                           final SchemaContext baseNetconfCtx) throws IOException, XMLStreamException {
 390         final XMLStreamWriter writer = NetconfUtil.XML_FACTORY.createXMLStreamWriter(result);
 391         try {
 392             try (NormalizedNodeStreamWriter normalizedNodeStreamWriter =
 393                     XMLStreamNormalizedNodeStreamWriter.create(writer, baseNetconfCtx, schemaPath)) {
 394                 try (SchemaOrderedNormalizedNodeWriter normalizedNodeWriter =
 395                         new SchemaOrderedNormalizedNodeWriter(normalizedNodeStreamWriter, baseNetconfCtx, schemaPath)) {
 396                     final Collection<DataContainerChild<?, ?>> value = normalized.getValue();
 397                     normalizedNodeWriter.write(value);
 398                     normalizedNodeWriter.flush();
 399                 }
 400             }
 401         } finally {
 402             try {
 403                 writer.close();
 404             } catch (final Exception e) {
 405                 LOG.warn("Unable to close resource properly", e);
 406             }
 407         }
 408     }
 409
 410     public static RpcResult<NetconfMessage> toRpcResult(final FailedNetconfMessage message) {
 411         return RpcResultBuilder.<NetconfMessage>failed()
 412                 .withRpcError(
 413                         toRpcError(
 414                                 new NetconfDocumentedException(
 415                                         message.getException().getMessage(),
 416                                         DocumentedException.ErrorType.APPLICATION,
 417                                         DocumentedException.ErrorTag.MALFORMED_MESSAGE,
 418                                         DocumentedException.ErrorSeverity.ERROR)))
 419                 .build();
 420     }
 421 }