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 org.eclipse.jdt.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;
23 import org.opendaylight.yangtools.yang.model.api.SchemaContextProvider;
25 final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot,
26 SchemaContextProvider {
27 private final @NonNull RootApplyStrategy applyOper;
28 private final @NonNull SchemaContext schemaContext;
29 private final @NonNull TreeNode rootNode;
31 InMemoryDataTreeSnapshot(final SchemaContext schemaContext, final TreeNode rootNode,
32 final RootApplyStrategy applyOper) {
33 this.schemaContext = requireNonNull(schemaContext);
34 this.rootNode = requireNonNull(rootNode);
35 this.applyOper = requireNonNull(applyOper);
38 TreeNode getRootNode() {
43 public SchemaContext getSchemaContext() {
48 public Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
49 return NormalizedNodes.findNode(rootNode.getData(), path);
53 public InMemoryDataTreeModification newModification() {
54 return new InMemoryDataTreeModification(this, applyOper);
58 public Optional<DataTreeSnapshotCursor> openCursor(final YangInstanceIdentifier path) {
59 return NormalizedNodes.findNode(rootNode.getData(), path).map(root -> {
60 checkArgument(root instanceof NormalizedNodeContainer, "Child %s is not a container", path);
61 return openCursor(new InMemoryDataTreeSnapshotCursor(this, path, (NormalizedNodeContainer<?, ?, ?>)root));
66 public String toString() {
67 return rootNode.getSubtreeVersion().toString();