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  * <p>
  21  * This implementation performs serialization of data, only if receiver
  22  * of notification actually accessed data from notification.
  23  *
  24  */
  25 public final class LazySerializedDOMNotification implements DOMNotification {
  26
  27     private final BindingNormalizedNodeSerializer codec;
  28     private final Notification data;
  29     private final SchemaPath type;
  30
  31     private ContainerNode domBody;
  32
  33     private LazySerializedDOMNotification(final BindingNormalizedNodeSerializer codec, final Notification data,
  34             final SchemaPath type) {
  35         this.codec = codec;
  36         this.data = data;
  37         this.type = type;
  38     }
  39
  40     static DOMNotification create(final BindingNormalizedNodeSerializer codec, final Notification data) {
  41         final SchemaPath type = SchemaPath.create(true, BindingReflections.findQName(data.getImplementedInterface()));
  42         return new LazySerializedDOMNotification(codec, data, type);
  43     }
  44
  45     @Override
  46     public SchemaPath getType() {
  47         return type;
  48     }
  49
  50     @Override
  51     public ContainerNode getBody() {
  52         if (domBody == null) {
  53             domBody = codec.toNormalizedNodeNotification(data);
  54         }
  55         return domBody;
  56     }
  57
  58     public Notification getBindingData() {
  59         return data;
  60     }
  61 }