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.yangtools.yang.data.api.schema;
10 import static com.google.common.base.Preconditions.checkNotNull;
11 import com.google.common.annotations.Beta;
12 import com.google.common.base.Optional;
13 import com.google.common.base.Predicate;
14 import com.google.common.base.Strings;
15 import com.google.common.collect.Maps;
16 import java.util.Arrays;
17 import java.util.Iterator;
19 import javax.annotation.Nonnull;
20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
27 * A set of utility methods for interacting with {@link NormalizedNode} objects.
30 public final class NormalizedNodes {
31 private static final int STRINGTREE_INDENT = 4;
32 private static final Predicate<DuplicateEntry> DUPLICATES_ONLY = new Predicate<DuplicateEntry>() {
34 public boolean apply(final DuplicateEntry input) {
35 return !input.getDuplicates().isEmpty();
39 private NormalizedNodes() {
40 throw new UnsupportedOperationException("Utility class should not be instantiated");
43 public static Optional<NormalizedNode<?, ?>> findNode(final YangInstanceIdentifier rootPath, final NormalizedNode<?, ?> rootNode, final YangInstanceIdentifier childPath) {
44 final Optional<YangInstanceIdentifier> relativePath = childPath.relativeTo(rootPath);
45 if (relativePath.isPresent()) {
46 return findNode(rootNode, relativePath.get());
48 return Optional.absent();
52 public static Optional<NormalizedNode<?, ?>> findNode(final Optional<NormalizedNode<?, ?>> parent, final Iterable<PathArgument> relativePath) {
53 checkNotNull(parent, "Parent must not be null");
54 checkNotNull(relativePath, "Relative path must not be null");
56 Optional<NormalizedNode<?, ?>> currentNode = parent;
57 final Iterator<PathArgument> pathIterator = relativePath.iterator();
58 while (currentNode.isPresent() && pathIterator.hasNext()) {
59 currentNode = getDirectChild(currentNode.get(), pathIterator.next());
64 public static Optional<NormalizedNode<?, ?>> findNode(final Optional<NormalizedNode<?, ?>> parent, final PathArgument... relativePath) {
65 return findNode(parent, Arrays.asList(relativePath));
68 public static Optional<NormalizedNode<?, ?>> findNode(final NormalizedNode<?, ?> parent, final Iterable<PathArgument> relativePath) {
69 return findNode(Optional.fromNullable(parent), relativePath);
72 public static Optional<NormalizedNode<?, ?>> findNode(final NormalizedNode<?, ?> parent, final PathArgument... relativePath) {
73 return findNode(parent, Arrays.asList(relativePath));
76 public static Optional<NormalizedNode<?, ?>> findNode(final NormalizedNode<?, ?> tree, final YangInstanceIdentifier path) {
77 checkNotNull(tree, "Tree must not be null");
78 checkNotNull(path, "Path must not be null");
80 return findNode(Optional.of(tree), path.getPathArguments());
83 @SuppressWarnings({ "unchecked", "rawtypes" })
84 public static Optional<NormalizedNode<?, ?>> getDirectChild(final NormalizedNode<?, ?> node, final PathArgument pathArg) {
85 if (node instanceof LeafNode<?> || node instanceof LeafSetEntryNode<?>) {
86 return Optional.absent();
87 } else if (node instanceof DataContainerNode<?>) {
88 return (Optional) ((DataContainerNode<?>) node).getChild(pathArg);
89 } else if (node instanceof MapNode && pathArg instanceof NodeIdentifierWithPredicates) {
90 return (Optional) ((MapNode) node).getChild((NodeIdentifierWithPredicates) pathArg);
91 } else if (node instanceof LeafSetNode<?>) {
92 return (Optional) ((LeafSetNode<?>) node).getChild((NodeWithValue) pathArg);
94 return Optional.absent();
98 * Convert a data subtree under a node into a human-readable string format.
100 * @param node Data subtree root
101 * @return String containing a human-readable form of the subtree.
103 public static String toStringTree(final NormalizedNode<?, ?> node) {
104 final StringBuilder builder = new StringBuilder();
105 toStringTree(builder, node, 0);
106 return builder.toString();
109 private static void toStringTree(final StringBuilder builder, final NormalizedNode<?, ?> node, final int offset) {
110 final String prefix = Strings.repeat(" ", offset);
112 builder.append(prefix).append(toStringTree(node.getIdentifier()));
113 if (node instanceof NormalizedNodeContainer<?, ?, ?>) {
114 final NormalizedNodeContainer<?, ?, ?> container = (NormalizedNodeContainer<?, ?, ?>) node;
116 builder.append(" {\n");
117 for (NormalizedNode<?, ?> child : container.getValue()) {
118 toStringTree(builder, child, offset + STRINGTREE_INDENT);
121 builder.append(prefix).append('}');
123 builder.append(' ').append(node.getValue());
125 builder.append('\n');
128 private static String toStringTree(final PathArgument identifier) {
129 if (identifier instanceof NodeIdentifierWithPredicates) {
130 return identifier.getNodeType().getLocalName() +
131 ((NodeIdentifierWithPredicates) identifier).getKeyValues().values();
132 } else if (identifier instanceof AugmentationIdentifier) {
133 return "augmentation";
135 return identifier.getNodeType().getLocalName();
140 * Find duplicate NormalizedNode instances within a subtree. Duplicates are those, which compare
141 * as equal, but do not refer to the same object.
143 * @param node A normalized node subtree, may not be null
144 * @return A Map of NormalizedNode/DuplicateEntry relationships.
146 public static Map<NormalizedNode<?, ?>, DuplicateEntry> findDuplicates(@Nonnull final NormalizedNode<?, ?> node) {
147 return Maps.filterValues(DuplicateFinder.findDuplicates(node), DUPLICATES_ONLY);