2 * Copyright (c) 2014 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.controller.md.sal.dom.store.impl.tree;
10 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
11 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
13 import com.google.common.base.Optional;
16 * Read-only snapshot of a {@link DataTree}. The snapshot is stable and isolated,
17 * e.g. data tree changes occurring after the snapshot has been taken are not
18 * visible through the snapshot.
20 public interface DataTreeSnapshot {
22 * Read a particular node from the snapshot.
24 * @param path Path of the node
25 * @return Optional result encapsulating the presence and value of the node
27 Optional<NormalizedNode<?, ?>> readNode(InstanceIdentifier path);
30 * Create a new data tree modification based on this snapshot, using the
31 * specified data application strategy.
33 * @param strategy data modification strategy
34 * @return A new data tree modification
36 DataTreeModification newModification();