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.controller.cluster.datastore.utils;
10 import java.util.List;
11 import java.util.Optional;
12 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
15 import org.opendaylight.yangtools.yang.data.tree.api.DataTree;
16 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
17 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeConfiguration;
18 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeModification;
19 import org.opendaylight.yangtools.yang.data.tree.api.DataValidationFailedException;
20 import org.opendaylight.yangtools.yang.data.tree.impl.di.InMemoryDataTreeFactory;
21 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
23 public final class NormalizedNodeAggregator {
24 private final YangInstanceIdentifier rootIdentifier;
25 private final List<Optional<NormalizedNode>> nodes;
26 private final DataTree dataTree;
28 private NormalizedNodeAggregator(final YangInstanceIdentifier rootIdentifier,
29 final List<Optional<NormalizedNode>> nodes, final EffectiveModelContext schemaContext,
30 final LogicalDatastoreType logicalDatastoreType) {
31 this.rootIdentifier = rootIdentifier;
33 dataTree = new InMemoryDataTreeFactory().create(logicalDatastoreType == LogicalDatastoreType.CONFIGURATION
34 ? DataTreeConfiguration.DEFAULT_CONFIGURATION : DataTreeConfiguration.DEFAULT_OPERATIONAL);
35 dataTree.setEffectiveModelContext(schemaContext);
39 * Combine data from all the nodes in the list into a tree with root as rootIdentifier.
41 public static Optional<NormalizedNode> aggregate(final YangInstanceIdentifier rootIdentifier,
42 final List<Optional<NormalizedNode>> nodes, final EffectiveModelContext schemaContext,
43 final LogicalDatastoreType logicalDatastoreType) throws DataValidationFailedException {
44 return new NormalizedNodeAggregator(rootIdentifier, nodes, schemaContext, logicalDatastoreType).aggregate();
47 private Optional<NormalizedNode> aggregate() throws DataValidationFailedException {
48 final DataTreeModification mod = dataTree.takeSnapshot().newModification();
49 boolean nodePresent = false;
51 for (final Optional<NormalizedNode> node : nodes) {
52 if (node.isPresent()) {
53 mod.merge(rootIdentifier, node.orElseThrow());
59 return Optional.empty();
64 dataTree.validate(mod);
65 final DataTreeCandidate candidate = dataTree.prepare(mod);
66 dataTree.commit(candidate);
68 return dataTree.takeSnapshot().readNode(rootIdentifier);