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 com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
12 import javax.annotation.Nonnull;
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.api.schema.NormalizedNodeContainer;
16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
17 import org.opendaylight.yangtools.yang.data.api.schema.tree.CursorAwareDataTreeSnapshot;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshotCursor;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
20 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
22 final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot {
23 private final RootModificationApplyOperation applyOper;
24 private final SchemaContext schemaContext;
25 private final TreeNode rootNode;
27 InMemoryDataTreeSnapshot(final SchemaContext schemaContext, final TreeNode rootNode,
28 final RootModificationApplyOperation applyOper) {
29 this.schemaContext = Preconditions.checkNotNull(schemaContext);
30 this.rootNode = Preconditions.checkNotNull(rootNode);
31 this.applyOper = Preconditions.checkNotNull(applyOper);
34 TreeNode getRootNode() {
38 SchemaContext getSchemaContext() {
43 public Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
44 return NormalizedNodes.findNode(rootNode.getData(), path);
48 public InMemoryDataTreeModification newModification() {
49 return new InMemoryDataTreeModification(this, applyOper);
53 public DataTreeSnapshotCursor createCursor(@Nonnull final YangInstanceIdentifier path) {
54 final Optional<NormalizedNode<?, ?>> maybeRoot = NormalizedNodes.findNode(rootNode.getData(), path);
55 if (!maybeRoot.isPresent()) {
59 final NormalizedNode<?, ?> root = maybeRoot.get();
60 Preconditions.checkArgument(root instanceof NormalizedNodeContainer, "Child %s is not a container", path);
61 return openCursor(new InMemoryDataTreeSnapshotCursor(this, path, (NormalizedNodeContainer<?, ?, ?>)root));
65 public String toString() {
66 return rootNode.getSubtreeVersion().toString();