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