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.yangtools.yang.data.api.schema.tree;
10 import com.google.common.annotations.Beta;
11 import java.util.Optional;
12 import javax.annotation.Nonnull;
13 import javax.annotation.Nullable;
14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
17 * A {@link DataTreeSnapshot} which allows creation of a {@link DataTreeSnapshotCursor}.
20 public interface CursorAwareDataTreeSnapshot extends DataTreeSnapshot {
22 * Create a new {@link DataTreeSnapshotCursor} at specified path. May fail
23 * if specified path does not exist.
25 * @param path Path at which the cursor is to be anchored
26 * @return A new cursor, or null if the path does not exist.
27 * @throws IllegalStateException if there is another cursor currently open.
28 * @deprecated Use {@link #openCursor(YangInstanceIdentifier)} instead.
31 @Nullable DataTreeSnapshotCursor createCursor(@Nonnull YangInstanceIdentifier path);
34 * Create a new {@link DataTreeSnapshotCursor} at specified path. May fail
35 * if specified path does not exist.
37 * @param path Path at which the cursor is to be anchored
38 * @return A new cursor, or empty if the path does not exist.
39 * @throws IllegalStateException if there is another cursor currently open.
41 default Optional<? extends DataTreeSnapshotCursor> openCursor(@Nonnull final YangInstanceIdentifier path) {
42 return Optional.ofNullable(createCursor(path));
46 * Create a new {@link DataTreeSnapshotCursor} at the root of the modification.
48 * @return A new cursor
49 * @throws IllegalStateException if there is another cursor currently open.
51 default DataTreeSnapshotCursor openCursor() {
52 return openCursor(YangInstanceIdentifier.EMPTY).get();
56 CursorAwareDataTreeModification newModification();