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.impl.schema.tree;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import java.util.Optional;
14 import javax.annotation.Nonnull;
15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
17 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.CursorAwareDataTreeSnapshot;
20 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshotCursor;
21 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
22 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
24 final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot {
25 private final RootModificationApplyOperation applyOper;
26 private final SchemaContext schemaContext;
27 private final TreeNode rootNode;
29 InMemoryDataTreeSnapshot(final SchemaContext schemaContext, final TreeNode rootNode,
30 final RootModificationApplyOperation applyOper) {
31 this.schemaContext = requireNonNull(schemaContext);
32 this.rootNode = requireNonNull(rootNode);
33 this.applyOper = requireNonNull(applyOper);
36 TreeNode getRootNode() {
40 SchemaContext getSchemaContext() {
45 public Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
46 return NormalizedNodes.findNode(rootNode.getData(), path);
50 public InMemoryDataTreeModification newModification() {
51 return new InMemoryDataTreeModification(this, applyOper);
55 public DataTreeSnapshotCursor createCursor(@Nonnull final YangInstanceIdentifier path) {
56 final Optional<NormalizedNode<?, ?>> maybeRoot = NormalizedNodes.findNode(rootNode.getData(), path);
57 if (!maybeRoot.isPresent()) {
61 final NormalizedNode<?, ?> root = maybeRoot.get();
62 checkArgument(root instanceof NormalizedNodeContainer, "Child %s is not a container", path);
63 return openCursor(new InMemoryDataTreeSnapshotCursor(this, path, (NormalizedNodeContainer<?, ?, ?>)root));
67 public String toString() {
68 return rootNode.getSubtreeVersion().toString();