opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazySerializedDOMNotification.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.controller.md.sal.binding.impl;
   9
  10 import org.opendaylight.controller.md.sal.dom.api.DOMNotification;
  11 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  12 import org.opendaylight.yangtools.yang.binding.Notification;
  13 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  14 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  15 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  16
  17 /**
  18  * Lazy serialized implementation of DOM Notification.
  19  *
  20  * This implementation performs serialization of data, only if receiver
  21  * of notification actually accessed data from notification.
  22  *
  23  */
  24 public final class LazySerializedDOMNotification implements DOMNotification {
  25
  26     private final BindingNormalizedNodeSerializer codec;
  27     private final Notification data;
  28     private final SchemaPath type;
  29
  30     private ContainerNode domBody;
  31
  32     private LazySerializedDOMNotification(final BindingNormalizedNodeSerializer codec, final Notification data, final SchemaPath type) {
  33         super();
  34         this.codec = codec;
  35         this.data = data;
  36         this.type = type;
  37     }
  38
  39     static DOMNotification create(final BindingNormalizedNodeSerializer codec, final Notification data) {
  40         final SchemaPath type = SchemaPath.create(true, BindingReflections.findQName(data.getImplementedInterface()));
  41         return new LazySerializedDOMNotification(codec, data, type);
  42     }
  43
  44     @Override
  45     public SchemaPath getType() {
  46         return type;
  47     }
  48
  49     @Override
  50     public ContainerNode getBody() {
  51         if (domBody == null) {
  52             domBody = codec.toNormalizedNodeNotification(data);
  53         }
  54         return domBody;
  55     }
  56
  57     public Notification getBindingData() {
  58         return data;
  59     }
  60 }