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.dom.api;
10 import com.google.common.annotations.Beta;
11 import java.util.Arrays;
12 import org.eclipse.jdt.annotation.NonNull;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
17 * A cursor holding a logical position within a conceptual data tree. It allows operations relative
18 * to that position, as well as moving the position up or down the tree.
21 * Implementations of this interface are expected to be inherently not-thread-safe.
24 public interface DOMDataTreeCursor extends AutoCloseable {
26 * Move the cursor to the specified child of the current position.
28 * @param child Child identifier
29 * @throws IllegalArgumentException when specified identifier does not identify a valid child,
30 * or if that child is not an instance of {@link NormalizedNodeContainer}.
32 void enter(@NonNull PathArgument child);
35 * Move the cursor to the specified child of the current position. This is the equivalent of
36 * multiple invocations of {@link #enter(PathArgument)}, except the operation is performed all
39 * @param path Nested child identifier
40 * @throws IllegalArgumentException when specified path does not identify a valid child, or if
41 * that child is not an instance of {@link NormalizedNodeContainer}.
43 default void enter(final @NonNull PathArgument... path) {
44 enter(Arrays.asList(path));
48 * Move the cursor to the specified child of the current position. This is equivalent to
49 * {@link #enter(PathArgument...)}, except it takes an {@link Iterable} argument.
51 * @param path Nested child identifier
52 * @throws IllegalArgumentException when specified path does not identify a valid child, or if
53 * that child is not an instance of {@link NormalizedNodeContainer}.
55 void enter(@NonNull Iterable<PathArgument> path);
58 * Move the cursor up to the parent of current position. This is equivalent of invoking
59 * <code>exit(1)</code>.
61 * @throws IllegalStateException when exiting would violate containment, typically by attempting
62 * to exit more levels than previously entered.
67 * Move the cursor up by specified amounts of steps from the current position. This is
68 * equivalent of invoking {@link #exit()} multiple times, except the operation is performed
71 * @param depth number of steps to exit
72 * @throws IllegalArgumentException when depth is negative.
73 * @throws IllegalStateException when exiting would violate containment, typically by attempting
74 * to exit more levels than previously entered.
79 * Close this cursor. Attempting any further operations on the cursor will lead to undefined