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 static java.util.Objects.requireNonNull;
12 import com.google.common.collect.Collections2;
13 import com.google.common.collect.ImmutableList;
14 import java.util.Collection;
15 import java.util.Optional;
16 import org.eclipse.jdt.annotation.NonNull;
17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
18 import org.opendaylight.yangtools.yang.data.api.schema.DistinctNodeContainer;
19 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
22 * Utility implementation of {@link DataTreeCandidateNode} which acts as if
23 * the {@link NormalizedNode} passed to it at creation time were freshly written.
25 final class NormalizedNodeDataTreeCandidateNode implements DataTreeCandidateNode {
26 private final NormalizedNode data;
29 * Create a new instance backed by supplied data.
31 * @param data Backing {@link NormalizedNode} data.
33 NormalizedNodeDataTreeCandidateNode(final @NonNull NormalizedNode data) {
34 this.data = requireNonNull(data);
38 public PathArgument getIdentifier() {
39 return data.getIdentifier();
43 public Collection<DataTreeCandidateNode> getChildNodes() {
44 if (data instanceof DistinctNodeContainer) {
45 return Collections2.transform(((DistinctNodeContainer<?, ?>) data).body(),
46 input -> input == null ? null : new NormalizedNodeDataTreeCandidateNode(input));
48 return ImmutableList.of();
52 @SuppressWarnings({ "rawtypes", "unchecked" })
53 public Optional<DataTreeCandidateNode> getModifiedChild(final PathArgument childIdentifier) {
54 if (data instanceof DistinctNodeContainer) {
55 return ((Optional<@NonNull NormalizedNode>) ((DistinctNodeContainer)data).findChildByArg(childIdentifier))
56 .map(NormalizedNodeDataTreeCandidateNode::new);
58 return Optional.empty();
62 public ModificationType getModificationType() {
63 return ModificationType.WRITE;
67 public Optional<NormalizedNode> getDataAfter() {
68 return Optional.of(data);
72 public Optional<NormalizedNode> getDataBefore() {
73 return Optional.empty();