binding2/mdsal-binding2-dom-codec/src/main/java/org/opendaylight/mdsal/binding/javav2/dom/codec/serialized/LazySerializedDOMNotification.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.javav2.dom.codec.serialized;
   9
  10 import com.google.common.annotations.Beta;
  11 import javax.annotation.Nonnull;
  12 import org.opendaylight.mdsal.binding.javav2.dom.codec.api.serializer.BindingNormalizedNodeSerializer;
  13 import org.opendaylight.mdsal.binding.javav2.runtime.reflection.BindingReflections;
  14 import org.opendaylight.mdsal.binding.javav2.spec.base.Notification;
  15 import org.opendaylight.mdsal.dom.api.DOMNotification;
  16 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  17 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  18
  19 /**
  20  * Lazy serialized implementation of DOM Notification.
  21  *
  22  * <p>
  23  * This implementation performs serialization of data, only if receiver of notification actually accessed data
  24  * from notification.
  25  *
  26  */
  27 @Beta
  28 public final class LazySerializedDOMNotification implements DOMNotification {
  29
  30     private final BindingNormalizedNodeSerializer codec;
  31     private final Notification<?> data;
  32     private final SchemaPath type;
  33
  34     private ContainerNode domBody;
  35
  36     private LazySerializedDOMNotification(final BindingNormalizedNodeSerializer codec, final Notification<?> data,
  37             final SchemaPath type) {
  38         this.codec = codec;
  39         this.data = data;
  40         this.type = type;
  41     }
  42
  43     /**
  44      * Create serializer of Binding notification data to DOM notification with specific codec.
  45      *
  46      * @param codec
  47      *            - specific codec
  48      * @param data
  49      *            - binding notification data
  50      * @return DOM notification serializer
  51      */
  52     public static DOMNotification create(final BindingNormalizedNodeSerializer codec, final Notification<?> data) {
  53         final SchemaPath type = SchemaPath.create(true, BindingReflections.findQName(data.getClass()));
  54         return new LazySerializedDOMNotification(codec, data, type);
  55     }
  56
  57     @Nonnull
  58     @Override
  59     public SchemaPath getType() {
  60         return type;
  61     }
  62
  63     @Nonnull
  64     @Override
  65     public ContainerNode getBody() {
  66         if (domBody == null) {
  67             domBody = codec.toNormalizedNodeNotification(data);
  68         }
  69         return domBody;
  70     }
  71
  72     /**
  73      * Get binding notification data.
  74      *
  75      * @return binding notification data
  76      */
  77     public Notification<?> getBindingData() {
  78         return data;
  79     }
  80 }