binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/BindingDOMNotificationListenerAdapter.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 package org.opendaylight.mdsal.binding.dom.adapter;
   9
  10 import org.opendaylight.mdsal.dom.api.DOMNotification;
  11 import org.opendaylight.mdsal.dom.api.DOMNotificationListener;
  12
  13 import com.google.common.collect.ImmutableMap;
  14 import com.google.common.reflect.TypeToken;
  15 import java.lang.reflect.Method;
  16 import java.util.HashMap;
  17 import java.util.HashSet;
  18 import java.util.Map;
  19 import java.util.Set;
  20 import javax.annotation.Nonnull;
  21 import org.opendaylight.yangtools.binding.data.codec.api.BindingNormalizedNodeSerializer;
  22 import org.opendaylight.yangtools.yang.binding.Notification;
  23 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  24 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  25 import org.opendaylight.yangtools.yang.binding.util.NotificationListenerInvoker;
  26 import org.opendaylight.yangtools.yang.common.QName;
  27 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  28
  29 class BindingDOMNotificationListenerAdapter implements DOMNotificationListener {
  30
  31     private final BindingNormalizedNodeSerializer codec;
  32     private final NotificationListener delegate;
  33     private final Map<SchemaPath,NotificationListenerInvoker> invokers;
  34
  35     public BindingDOMNotificationListenerAdapter(final BindingNormalizedNodeSerializer codec, final NotificationListener delegate) {
  36         this.codec = codec;
  37         this.delegate = delegate;
  38         this.invokers = createInvokerMapFor(delegate.getClass());
  39     }
  40
  41     @Override
  42     public void onNotification(@Nonnull final DOMNotification notification) {
  43         final Notification baNotification = deserialize(notification);
  44         final QName notificationQName = notification.getType().getLastComponent();
  45         getInvoker(notification.getType()).invokeNotification(delegate, notificationQName, baNotification);
  46     }
  47
  48     private Notification deserialize(final DOMNotification notification) {
  49         if(notification instanceof LazySerializedDOMNotification) {
  50             return ((LazySerializedDOMNotification) notification).getBindingData();
  51         }
  52         return codec.fromNormalizedNodeNotification(notification.getType(), notification.getBody());
  53     }
  54
  55     private NotificationListenerInvoker getInvoker(final SchemaPath type) {
  56         return invokers.get(type);
  57     }
  58
  59     protected Set<SchemaPath> getSupportedNotifications() {
  60         return invokers.keySet();
  61     }
  62
  63     public static Map<SchemaPath, NotificationListenerInvoker> createInvokerMapFor(final Class<? extends NotificationListener> implClz) {
  64         final Map<SchemaPath, NotificationListenerInvoker> builder = new HashMap<>();
  65         for(final TypeToken<?> ifaceToken : TypeToken.of(implClz).getTypes().interfaces()) {
  66             Class<?> iface = ifaceToken.getRawType();
  67             if(NotificationListener.class.isAssignableFrom(iface) && BindingReflections.isBindingClass(iface)) {
  68                 @SuppressWarnings("unchecked")
  69                 final Class<? extends NotificationListener> listenerType = (Class<? extends NotificationListener>) iface;
  70                 final NotificationListenerInvoker invoker = NotificationListenerInvoker.from(listenerType);
  71                 for(final SchemaPath path : getNotificationTypes(listenerType)) {
  72                     builder.put(path, invoker);
  73                 }
  74             }
  75         }
  76         return ImmutableMap.copyOf(builder);
  77     }
  78
  79     private static Set<SchemaPath> getNotificationTypes(final Class<? extends NotificationListener> type) {
  80         // TODO: Investigate possibility and performance impact if we cache this or expose
  81         // it from NotificationListenerInvoker
  82         final Set<SchemaPath> ret = new HashSet<>();
  83         for(final Method method : type.getMethods()) {
  84             if(BindingReflections.isNotificationCallback(method)) {
  85                 final Class<?> notification = method.getParameterTypes()[0];
  86                 final QName name = BindingReflections.findQName(notification);
  87                 ret.add(SchemaPath.create(true, name));
  88             }
  89         }
  90         return ret;
  91     }
  92 }