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 org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
13 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
15 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
16 import org.opendaylight.yangtools.yang.data.api.schema.tree.CursorAwareDataTreeSnapshot;
17 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshotCursor;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
19 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
21 final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot {
22 private final RootModificationApplyOperation applyOper;
23 private final SchemaContext schemaContext;
24 private final TreeNode rootNode;
26 InMemoryDataTreeSnapshot(final SchemaContext schemaContext, final TreeNode rootNode,
27 final RootModificationApplyOperation applyOper) {
28 this.schemaContext = Preconditions.checkNotNull(schemaContext);
29 this.rootNode = Preconditions.checkNotNull(rootNode);
30 this.applyOper = Preconditions.checkNotNull(applyOper);
33 TreeNode getRootNode() {
37 SchemaContext getSchemaContext() {
42 public Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
43 return NormalizedNodes.findNode(rootNode.getData(), path);
47 public InMemoryDataTreeModification newModification() {
48 return new InMemoryDataTreeModification(this, applyOper);
52 public DataTreeSnapshotCursor createCursor(final YangInstanceIdentifier path) {
53 final Optional<NormalizedNode<?, ?>> maybeRoot = NormalizedNodes.findNode(rootNode.getData(), path);
54 if (!maybeRoot.isPresent()) {
58 final NormalizedNode<?, ?> root = maybeRoot.get();
59 Preconditions.checkArgument(root instanceof NormalizedNodeContainer, "Child %s is not a container", path);
60 return openCursor(new InMemoryDataTreeSnapshotCursor(this, path, (NormalizedNodeContainer<?, ?, ?>)root));
64 public String toString() {
65 return rootNode.getSubtreeVersion().toString();