2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.mdsal.binding.dom.adapter;
10 import static java.util.Objects.requireNonNull;
12 import java.util.List;
13 import org.eclipse.jdt.annotation.NonNullByDefault;
14 import org.eclipse.jdt.annotation.Nullable;
15 import org.opendaylight.mdsal.binding.api.DataTreeChangeListener;
16 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
17 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
18 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
19 import org.opendaylight.yangtools.yang.binding.Augmentation;
20 import org.opendaylight.yangtools.yang.binding.DataObject;
21 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
24 * Adapter wrapping Binding {@link DataTreeChangeListener} and exposing it as {@link DOMDataTreeChangeListener}
25 * and translated DOM events to their Binding equivalent.
28 final class BindingDOMDataTreeChangeListenerAdapter<T extends DataObject> implements DOMDataTreeChangeListener {
29 private final AdapterContext adapterContext;
30 private final DataTreeChangeListener<T> listener;
31 private final LogicalDatastoreType store;
32 private final @Nullable Class<? extends Augmentation<?>> augment;
34 private boolean initialSyncDone;
36 BindingDOMDataTreeChangeListenerAdapter(final AdapterContext adapterContext, final DataTreeIdentifier<T> treeId,
37 final DataTreeChangeListener<T> listener) {
38 this.adapterContext = requireNonNull(adapterContext);
39 this.listener = requireNonNull(listener);
40 store = treeId.datastore();
41 augment = extractAugment(treeId.path().getTargetType());
44 @SuppressWarnings("unchecked")
45 private static @Nullable Class<? extends Augmentation<?>> extractAugment(final Class<?> target) {
46 return Augmentation.class.isAssignableFrom(target)
47 ? (Class<? extends Augmentation<?>>) target.asSubclass(Augmentation.class) : null;
51 public void onDataTreeChanged(final List<DataTreeCandidate> domChanges) {
52 final var changes = LazyDataTreeModification.<T>from(adapterContext.currentSerializer(), domChanges, store,
54 if (!changes.isEmpty()) {
55 listener.onDataTreeChanged(changes);
56 } else if (!initialSyncDone) {
62 public void onInitialData() {
63 initialSyncDone = true;
64 listener.onInitialData();