netconf/netconf-notifications-impl/src/main/java/org/opendaylight/netconf/notifications/impl/ops/NotificationsTransformUtil.java

   1 /*
   2  * Copyright (c) 2015 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
   9 package org.opendaylight.netconf.notifications.impl.ops;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.base.Predicate;
  14 import com.google.common.collect.Collections2;
  15 import com.google.common.collect.Iterables;
  16 import java.io.IOException;
  17 import java.util.Collections;
  18 import java.util.Date;
  19 import javassist.ClassPool;
  20 import javax.xml.stream.XMLStreamException;
  21 import javax.xml.transform.dom.DOMResult;
  22 import org.opendaylight.controller.config.util.xml.XmlUtil;
  23 import org.opendaylight.mdsal.binding.dom.codec.gen.impl.StreamWriterGenerator;
  24 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingNormalizedNodeCodecRegistry;
  25 import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
  26 import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
  27 import org.opendaylight.mdsal.binding.generator.util.JavassistUtils;
  28 import org.opendaylight.netconf.notifications.NetconfNotification;
  29 import org.opendaylight.netconf.util.NetconfUtil;
  30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.netmod.notification.rev080714.$YangModuleInfoImpl;
  31 import org.opendaylight.yangtools.yang.binding.Notification;
  32 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  33 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  34 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  35 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38 import org.w3c.dom.Document;
  39
  40 public final class NotificationsTransformUtil {
  41
  42     private static final Logger LOG = LoggerFactory.getLogger(NotificationsTransformUtil.class);
  43
  44     private NotificationsTransformUtil() {}
  45
  46     static final SchemaContext NOTIFICATIONS_SCHEMA_CTX;
  47     static final BindingNormalizedNodeCodecRegistry CODEC_REGISTRY;
  48     static final RpcDefinition CREATE_SUBSCRIPTION_RPC;
  49
  50     static {
  51
  52         final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
  53         moduleInfoBackedContext.addModuleInfos(Collections.singletonList($YangModuleInfoImpl.getInstance()));
  54         moduleInfoBackedContext.addModuleInfos(Collections.singletonList(org.opendaylight.yang.gen.v1.urn.ietf.params
  55                 .xml.ns.yang.ietf.netconf.notifications.rev120206.$YangModuleInfoImpl.getInstance()));
  56         final Optional<SchemaContext> schemaContextOptional = moduleInfoBackedContext.tryToCreateSchemaContext();
  57         Preconditions.checkState(schemaContextOptional.isPresent());
  58         NOTIFICATIONS_SCHEMA_CTX = schemaContextOptional.get();
  59
  60         CREATE_SUBSCRIPTION_RPC = Preconditions.checkNotNull(findCreateSubscriptionRpc());
  61
  62         Preconditions.checkNotNull(CREATE_SUBSCRIPTION_RPC);
  63
  64         final JavassistUtils javassist = JavassistUtils.forClassPool(ClassPool.getDefault());
  65         CODEC_REGISTRY = new BindingNormalizedNodeCodecRegistry(StreamWriterGenerator.create(javassist));
  66         CODEC_REGISTRY.onBindingRuntimeContextUpdated(BindingRuntimeContext.create(moduleInfoBackedContext,
  67                 NOTIFICATIONS_SCHEMA_CTX));
  68     }
  69
  70     private static RpcDefinition findCreateSubscriptionRpc() {
  71         return Iterables.getFirst(Collections2.filter(NOTIFICATIONS_SCHEMA_CTX.getOperations(),
  72             new Predicate<RpcDefinition>() {
  73                 @Override
  74                 public boolean apply(final RpcDefinition input) {
  75                     return input.getQName().getLocalName().equals(CreateSubscription.CREATE_SUBSCRIPTION);
  76                 }
  77             }), null);
  78     }
  79
  80     /**
  81      * Transform base notification for capabilities into NetconfNotification.
  82      */
  83     public static NetconfNotification transform(final Notification notification, SchemaPath path) {
  84         return transform(notification, Optional.<Date>absent(), path);
  85     }
  86
  87     public static NetconfNotification transform(final Notification notification,
  88                                                 final Date eventTime, SchemaPath path) {
  89         return transform(notification, Optional.fromNullable(eventTime), path);
  90     }
  91
  92     private static NetconfNotification transform(final Notification notification,
  93                                                  final Optional<Date> eventTime, SchemaPath path) {
  94         final ContainerNode containerNode = CODEC_REGISTRY.toNormalizedNodeNotification(notification);
  95         final DOMResult result = new DOMResult(XmlUtil.newDocument());
  96         try {
  97             NetconfUtil.writeNormalizedNode(containerNode, result, path, NOTIFICATIONS_SCHEMA_CTX);
  98         } catch (final XMLStreamException | IOException e) {
  99             throw new IllegalStateException("Unable to serialize " + notification, e);
 100         }
 101         final Document node = (Document) result.getNode();
 102         return eventTime.isPresent() ? new NetconfNotification(node, eventTime.get()) : new NetconfNotification(node);
 103     }
 104
 105 }