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.impl.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 = QName.create(CreateSubscriptionInput.QNAME, "create-subscription").intern();
  78     private static final String SUBTREE = "subtree";
  79
  80     // Blank document used for creation of new DOM nodes
  81     private static final Document BLANK_DOCUMENT = XmlUtil.newDocument();
  82     public static final String EVENT_TIME = "eventTime";
  83
  84     private NetconfMessageTransformUtil() {}
  85
  86     public static final QName IETF_NETCONF_MONITORING = QName.create(NetconfState.QNAME, "ietf-netconf-monitoring").intern();
  87     public static final QName GET_DATA_QNAME = QName.create(IETF_NETCONF_MONITORING, "data").intern();
  88     public static final QName GET_SCHEMA_QNAME = QName.create(IETF_NETCONF_MONITORING, "get-schema").intern();
  89     public static final QName IETF_NETCONF_MONITORING_SCHEMA_FORMAT = QName.create(IETF_NETCONF_MONITORING, "format").intern();
  90     public static final QName IETF_NETCONF_MONITORING_SCHEMA_LOCATION = QName.create(IETF_NETCONF_MONITORING, "location").intern();
  91     public static final QName IETF_NETCONF_MONITORING_SCHEMA_IDENTIFIER = QName.create(IETF_NETCONF_MONITORING, "identifier").intern();
  92     public static final QName IETF_NETCONF_MONITORING_SCHEMA_VERSION = QName.create(IETF_NETCONF_MONITORING, "version").intern();
  93     public static final QName IETF_NETCONF_MONITORING_SCHEMA_NAMESPACE = QName.create(IETF_NETCONF_MONITORING, "namespace").intern();
  94
  95     public static final QName IETF_NETCONF_NOTIFICATIONS = QName.create(NetconfCapabilityChange.QNAME, "ietf-netconf-notifications").intern();
  96
  97     public static final QName NETCONF_QNAME = QName.create("urn:ietf:params:xml:ns:netconf:base:1.0", "2011-06-01", "netconf").intern();
  98     public static final URI NETCONF_URI = NETCONF_QNAME.getNamespace();
  99
 100     public static final QName NETCONF_DATA_QNAME = QName.create(NETCONF_QNAME, "data").intern();
 101     public static final QName NETCONF_RPC_REPLY_QNAME = QName.create(NETCONF_QNAME, "rpc-reply").intern();
 102     public static final QName NETCONF_OK_QNAME = QName.create(NETCONF_QNAME, "ok").intern();
 103     public static final QName NETCONF_ERROR_OPTION_QNAME = QName.create(NETCONF_QNAME, "error-option").intern();
 104     public static final QName NETCONF_RUNNING_QNAME = QName.create(NETCONF_QNAME, "running").intern();
 105     public static final QName NETCONF_SOURCE_QNAME = QName.create(NETCONF_QNAME, "source").intern();
 106     public static final QName NETCONF_CANDIDATE_QNAME = QName.create(NETCONF_QNAME, "candidate").intern();
 107     public static final QName NETCONF_TARGET_QNAME = QName.create(NETCONF_QNAME, "target").intern();
 108     public static final QName NETCONF_CONFIG_QNAME = QName.create(NETCONF_QNAME, "config").intern();
 109     public static final QName NETCONF_COMMIT_QNAME = QName.create(NETCONF_QNAME, "commit").intern();
 110     public static final QName NETCONF_VALIDATE_QNAME = QName.create(NETCONF_QNAME, "validate").intern();
 111     public static final QName NETCONF_COPY_CONFIG_QNAME = QName.create(NETCONF_QNAME, "copy-config").intern();
 112     public static final QName NETCONF_OPERATION_QNAME = QName.create(NETCONF_QNAME, "operation").intern();
 113     public static final QName NETCONF_DEFAULT_OPERATION_QNAME = QName.create(NETCONF_OPERATION_QNAME, "default-operation").intern();
 114     public static final QName NETCONF_EDIT_CONFIG_QNAME = QName.create(NETCONF_QNAME, "edit-config").intern();
 115     public static final QName NETCONF_GET_CONFIG_QNAME = QName.create(NETCONF_QNAME, "get-config");
 116     public static final QName NETCONF_DISCARD_CHANGES_QNAME = QName.create(NETCONF_QNAME, "discard-changes");
 117     public static final QName NETCONF_TYPE_QNAME = QName.create(NETCONF_QNAME, "type").intern();
 118     public static final QName NETCONF_FILTER_QNAME = QName.create(NETCONF_QNAME, "filter").intern();
 119     public static final QName NETCONF_GET_QNAME = QName.create(NETCONF_QNAME, "get").intern();
 120     public static final QName NETCONF_RPC_QNAME = QName.create(NETCONF_QNAME, "rpc").intern();
 121
 122     public static final URI NETCONF_ROLLBACK_ON_ERROR_URI = URI
 123             .create("urn:ietf:params:netconf:capability:rollback-on-error:1.0");
 124     public static final String ROLLBACK_ON_ERROR_OPTION = "rollback-on-error";
 125
 126     public static final URI NETCONF_CANDIDATE_URI = URI
 127             .create("urn:ietf:params:netconf:capability:candidate:1.0");
 128
 129     public static final URI NETCONF_NOTIFICATONS_URI = URI
 130             .create("urn:ietf:params:netconf:capability:notification:1.0");
 131
 132     public static final URI NETCONF_RUNNING_WRITABLE_URI = URI
 133             .create("urn:ietf:params:netconf:capability:writable-running:1.0");
 134
 135     public static final QName NETCONF_LOCK_QNAME = QName.create(NETCONF_QNAME, "lock").intern();
 136     public static final QName NETCONF_UNLOCK_QNAME = QName.create(NETCONF_QNAME, "unlock").intern();
 137
 138     // Discard changes message
 139     public static final ContainerNode DISCARD_CHANGES_RPC_CONTENT =
 140             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_DISCARD_CHANGES_QNAME)).build();
 141
 142     // Commit changes message
 143     public static final ContainerNode COMMIT_RPC_CONTENT =
 144             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_COMMIT_QNAME)).build();
 145
 146     // Get message
 147     public static final ContainerNode GET_RPC_CONTENT =
 148             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(NETCONF_GET_QNAME)).build();
 149
 150     // Create-subscription changes message
 151     public static final ContainerNode CREATE_SUBSCRIPTION_RPC_CONTENT =
 152             Builders.containerBuilder().withNodeIdentifier(new NodeIdentifier(CREATE_SUBSCRIPTION_RPC_QNAME)).build();
 153
 154     public static final DataContainerChild<?, ?> EMPTY_FILTER;
 155
 156     static {
 157         final NormalizedNodeAttrBuilder<NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder = Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 158         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 159
 160         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(), Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 161         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(), NETCONF_TYPE_QNAME.getLocalName(), "subtree");
 162
 163         anyXmlBuilder.withValue(new DOMSource(element));
 164
 165         EMPTY_FILTER = anyXmlBuilder.build();
 166     }
 167
 168     public static DataContainerChild<?, ?> toFilterStructure(final YangInstanceIdentifier identifier, final SchemaContext ctx) {
 169         final NormalizedNodeAttrBuilder<NodeIdentifier, DOMSource, AnyXmlNode> anyXmlBuilder = Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_FILTER_QNAME));
 170         anyXmlBuilder.withAttributes(Collections.singletonMap(NETCONF_TYPE_QNAME, SUBTREE));
 171
 172         final NormalizedNode<?, ?> filterContent = ImmutableNodes.fromInstanceId(ctx, identifier);
 173
 174         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_FILTER_QNAME.getLocalName(), Optional.of(NETCONF_FILTER_QNAME.getNamespace().toString()));
 175         element.setAttributeNS(NETCONF_FILTER_QNAME.getNamespace().toString(), NETCONF_TYPE_QNAME.getLocalName(), "subtree");
 176
 177         try {
 178             NetconfUtil.writeNormalizedNode(filterContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 179         } catch (IOException | XMLStreamException e) {
 180             throw new IllegalStateException("Unable to serialize filter element for path " + identifier, e);
 181         }
 182         anyXmlBuilder.withValue(new DOMSource(element));
 183
 184         return anyXmlBuilder.build();
 185     }
 186
 187     public static void checkValidReply(final NetconfMessage input, final NetconfMessage output)
 188             throws NetconfDocumentedException {
 189         final String inputMsgId = input.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 190         final String outputMsgId = output.getDocument().getDocumentElement().getAttribute(MESSAGE_ID_ATTR);
 191
 192         if(inputMsgId.equals(outputMsgId) == false) {
 193             final Map<String,String> errorInfo = ImmutableMap.<String,String>builder()
 194                     .put( "actual-message-id", outputMsgId )
 195                     .put( "expected-message-id", inputMsgId )
 196                     .build();
 197
 198             throw new NetconfDocumentedException( "Response message contained unknown \"message-id\"",
 199                     null, NetconfDocumentedException.ErrorType.PROTOCOL,
 200                     NetconfDocumentedException.ErrorTag.BAD_ATTRIBUTE,
 201                     NetconfDocumentedException.ErrorSeverity.ERROR, errorInfo);
 202         }
 203     }
 204
 205     public static void checkSuccessReply(final NetconfMessage output) throws NetconfDocumentedException {
 206         if(NetconfMessageUtil.isErrorMessage(output)) {
 207             throw NetconfDocumentedException.fromXMLDocument(output.getDocument());
 208         }
 209     }
 210
 211     public static RpcError toRpcError( final NetconfDocumentedException ex ) {
 212         final StringBuilder infoBuilder = new StringBuilder();
 213         final Map<String, String> errorInfo = ex.getErrorInfo();
 214         if(errorInfo != null) {
 215             for( final Entry<String,String> e: errorInfo.entrySet() ) {
 216                 infoBuilder.append( '<' ).append( e.getKey() ).append( '>' ).append( e.getValue() )
 217                 .append( "</" ).append( e.getKey() ).append( '>' );
 218
 219             }
 220         }
 221
 222         final ErrorSeverity severity = toRpcErrorSeverity( ex.getErrorSeverity() );
 223         return severity == ErrorSeverity.ERROR ?
 224                 RpcResultBuilder.newError(
 225                         toRpcErrorType( ex.getErrorType() ), ex.getErrorTag().getTagValue(),
 226                         ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause() ) :
 227                             RpcResultBuilder.newWarning(
 228                                     toRpcErrorType( ex.getErrorType() ), ex.getErrorTag().getTagValue(),
 229                                     ex.getLocalizedMessage(), null, infoBuilder.toString(), ex.getCause() );
 230     }
 231
 232     private static ErrorSeverity toRpcErrorSeverity( final NetconfDocumentedException.ErrorSeverity severity ) {
 233         switch (severity) {
 234             case WARNING:
 235                 return RpcError.ErrorSeverity.WARNING;
 236             default:
 237                 return RpcError.ErrorSeverity.ERROR;
 238         }
 239     }
 240
 241     private static RpcError.ErrorType toRpcErrorType(final NetconfDocumentedException.ErrorType type) {
 242         switch (type) {
 243             case PROTOCOL:
 244             return RpcError.ErrorType.PROTOCOL;
 245             case RPC:
 246             return RpcError.ErrorType.RPC;
 247             case TRANSPORT:
 248             return RpcError.ErrorType.TRANSPORT;
 249         default:
 250             return RpcError.ErrorType.APPLICATION;
 251         }
 252     }
 253
 254     public static NodeIdentifier toId(final PathArgument qname) {
 255         return toId(qname.getNodeType());
 256     }
 257
 258     public static NodeIdentifier toId(final QName nodeType) {
 259         return new NodeIdentifier(nodeType);
 260     }
 261
 262     public static Element getDataSubtree(final Document doc) {
 263         return (Element) doc.getElementsByTagNameNS(NETCONF_URI.toString(), "data").item(0);
 264     }
 265
 266     public static boolean isDataRetrievalOperation(final QName rpc) {
 267         return NETCONF_URI.equals(rpc.getNamespace())
 268                 && (NETCONF_GET_CONFIG_QNAME.getLocalName().equals(rpc.getLocalName())
 269                 || NETCONF_GET_QNAME.getLocalName().equals(rpc.getLocalName()));
 270     }
 271
 272     public static ContainerSchemaNode createSchemaForDataRead(final SchemaContext schemaContext) {
 273         return new NodeContainerProxy(NETCONF_DATA_QNAME, schemaContext.getChildNodes());
 274     }
 275
 276     public static ContainerSchemaNode createSchemaForNotification(final NotificationDefinition next) {
 277         return new NodeContainerProxy(next.getQName(), next.getChildNodes(), next.getAvailableAugmentations());
 278     }
 279
 280     public static ContainerNode wrap(final QName name, final DataContainerChild<?, ?>... node) {
 281         return Builders.containerBuilder().withNodeIdentifier(toId(name)).withValue(ImmutableList.copyOf(node)).build();
 282     }
 283
 284     public static AnyXmlNode createEditConfigAnyxml(final SchemaContext ctx, final YangInstanceIdentifier dataPath,
 285                                                                      final Optional<ModifyAction> operation, final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 286         final NormalizedNode<?, ?> configContent;
 287
 288         if (dataPath.isEmpty()) {
 289             Preconditions.checkArgument(lastChildOverride.isPresent(), "Data has to be present when creating structure for top level element");
 290             Preconditions.checkArgument(lastChildOverride.get() instanceof DataContainerChild<?, ?>,
 291                     "Data has to be either container or a list node when creating structure for top level element, but was: %s", lastChildOverride.get());
 292             configContent = lastChildOverride.get();
 293         } else {
 294             final Entry<QName, ModifyAction> modifyOperation =
 295                     operation.isPresent() ? new AbstractMap.SimpleEntry<>(NETCONF_OPERATION_QNAME, operation.get()) : null;
 296             configContent = ImmutableNodes.fromInstanceId(ctx, dataPath, lastChildOverride, Optional.fromNullable(modifyOperation));
 297         }
 298
 299         final Element element = XmlUtil.createElement(BLANK_DOCUMENT, NETCONF_CONFIG_QNAME.getLocalName(), Optional.of(NETCONF_CONFIG_QNAME.getNamespace().toString()));
 300         try {
 301             NetconfUtil.writeNormalizedNode(configContent, new DOMResult(element), SchemaPath.ROOT, ctx);
 302         } catch (IOException | XMLStreamException e) {
 303             throw new IllegalStateException("Unable to serialize edit config content element for path " + dataPath, e);
 304         }
 305         final DOMSource value = new DOMSource(element);
 306
 307         return Builders.anyXmlBuilder().withNodeIdentifier(toId(NETCONF_CONFIG_QNAME)).withValue(value).build();
 308     }
 309
 310     public static DataContainerChild<?, ?> createEditConfigStructure(final SchemaContext ctx, final YangInstanceIdentifier dataPath,
 311                                                                      final Optional<ModifyAction> operation, final Optional<NormalizedNode<?, ?>> lastChildOverride) {
 312         return Builders.choiceBuilder().withNodeIdentifier(toId(EditContent.QNAME))
 313                 .withChild(createEditConfigAnyxml(ctx, dataPath, operation, lastChildOverride)).build();
 314     }
 315
 316     public static SchemaPath toPath(final QName rpc) {
 317         return SchemaPath.create(true, rpc);
 318     }
 319
 320     public static Map.Entry<Date, XmlElement> stripNotification(final NetconfMessage message) {
 321         final XmlElement xmlElement = XmlElement.fromDomDocument(message.getDocument());
 322         final List<XmlElement> childElements = xmlElement.getChildElements();
 323         Preconditions.checkArgument(childElements.size() == 2, "Unable to parse notification %s, unexpected format.\nExpected 2 childElements," +
 324                 " actual childElements size is %s", message, childElements.size());
 325
 326         final XmlElement eventTimeElement;
 327         final XmlElement notificationElement;
 328
 329         if (childElements.get(0).getName().equals(EVENT_TIME)) {
 330             eventTimeElement = childElements.get(0);
 331             notificationElement = childElements.get(1);
 332         }
 333         else if(childElements.get(1).getName().equals(EVENT_TIME)) {
 334             eventTimeElement = childElements.get(1);
 335             notificationElement = childElements.get(0);
 336         } else {
 337             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 338         }
 339
 340         try {
 341             return new AbstractMap.SimpleEntry<>(
 342                     NetconfNotification.RFC3339_DATE_PARSER.apply(eventTimeElement.getTextContent()),
 343                     notificationElement);
 344         } catch (final DocumentedException e) {
 345             throw new IllegalArgumentException("Notification payload does not contain " + EVENT_TIME + " " + message);
 346         } catch (final DateTimeParseException e) {
 347             LOG.warn("Unable to parse event time from {}. Setting time to {}", eventTimeElement, NetconfNotification.UNKNOWN_EVENT_TIME, e);
 348             return new AbstractMap.SimpleEntry<>(NetconfNotification.UNKNOWN_EVENT_TIME, notificationElement);
 349         }
 350     }
 351
 352     public static DOMResult prepareDomResultForRpcRequest(final QName rpcQName, final MessageCounter counter) {
 353         final Document document = XmlUtil.newDocument();
 354         final Element rpcNS =
 355                 document.createElementNS(NETCONF_RPC_QNAME.getNamespace().toString(), NETCONF_RPC_QNAME.getLocalName());
 356         // set msg id
 357         rpcNS.setAttribute(MESSAGE_ID_ATTR, counter.getNewMessageId(MESSAGE_ID_PREFIX));
 358         final Element elementNS = document.createElementNS(rpcQName.getNamespace().toString(), rpcQName.getLocalName());
 359         rpcNS.appendChild(elementNS);
 360         document.appendChild(rpcNS);
 361         return new DOMResult(elementNS);
 362     }
 363
 364     public static void writeNormalizedRpc(final ContainerNode normalized, final DOMResult result,
 365                                           final SchemaPath schemaPath, final SchemaContext baseNetconfCtx) throws IOException, XMLStreamException {
 366         final XMLStreamWriter writer = NetconfUtil.XML_FACTORY.createXMLStreamWriter(result);
 367         try {
 368             try (final NormalizedNodeStreamWriter normalizedNodeStreamWriter =
 369                     XMLStreamNormalizedNodeStreamWriter.create(writer, baseNetconfCtx, schemaPath)) {
 370                 try (final SchemaOrderedNormalizedNodeWriter normalizedNodeWriter =
 371                         new SchemaOrderedNormalizedNodeWriter(normalizedNodeStreamWriter, baseNetconfCtx, schemaPath)) {
 372                     final Collection<DataContainerChild<?, ?>> value = normalized.getValue();
 373                     normalizedNodeWriter.write(value);
 374                     normalizedNodeWriter.flush();
 375                 }
 376             }
 377         } finally {
 378             try {
 379                 writer.close();
 380             } catch (final Exception e) {
 381                LOG.warn("Unable to close resource properly", e);
 382             }
 383         }
 384     }
 385
 386     public static RpcResult<NetconfMessage> toRpcResult(final FailedNetconfMessage message) {
 387         return RpcResultBuilder.<NetconfMessage>failed()
 388                 .withRpcError(
 389                         toRpcError(
 390                                 new NetconfDocumentedException(
 391                                         message.getException().getMessage(),
 392                                         DocumentedException.ErrorType.APPLICATION,
 393                                         DocumentedException.ErrorTag.MALFORMED_MESSAGE,
 394                                         DocumentedException.ErrorSeverity.ERROR)))
 395                 .build();
 396     }
 397 }