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.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
15 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
16 import org.opendaylight.yangtools.yang.data.api.schema.ValueNode;
17 import org.opendaylight.yangtools.yang.data.api.schema.tree.IncorrectDataStructureException;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
20 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
21 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
22 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
24 final class ValueNodeModificationStrategy<T extends DataSchemaNode> extends SchemaAwareApplyOperation {
25 private final Class<? extends ValueNode> nodeClass;
26 private final T schema;
28 ValueNodeModificationStrategy(final Class<? extends ValueNode> nodeClass, final T schema) {
29 this.nodeClass = requireNonNull(nodeClass);
30 this.schema = requireNonNull(schema);
34 public Optional<ModificationApplyOperation> getChild(final PathArgument child) {
35 throw new UnsupportedOperationException("Node " + schema.getPath()
36 + " is leaf type node. Child nodes not allowed");
40 protected ChildTrackingPolicy getChildPolicy() {
41 return ChildTrackingPolicy.NONE;
45 protected TreeNode applyTouch(final ModifiedNode modification, final TreeNode currentMeta,
46 final Version version) {
47 throw new UnsupportedOperationException("Node " + schema.getPath()
48 + " is leaf type node. Subtree change is not allowed.");
52 protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta,
53 final Version version) {
54 // Just overwrite whatever was there, but be sure to run validation
55 final NormalizedNode<?, ?> newValue = modification.getWrittenValue();
56 verifyWrittenValue(newValue);
57 modification.resolveModificationType(ModificationType.WRITE);
58 return applyWrite(modification, newValue, null, version);
62 protected TreeNode applyWrite(final ModifiedNode modification, final NormalizedNode<?, ?> newValue,
63 final Optional<TreeNode> currentMeta, final Version version) {
64 return TreeNodeFactory.createTreeNode(newValue, version);
68 protected void checkTouchApplicable(final ModificationPath path, final NodeModification modification,
69 final Optional<TreeNode> current, final Version version) throws IncorrectDataStructureException {
70 throw new IncorrectDataStructureException(path.toInstanceIdentifier(), "Subtree modification is not allowed.");
74 void mergeIntoModifiedNode(final ModifiedNode node, final NormalizedNode<?, ?> value, final Version version) {
75 switch (node.getOperation()) {
76 // Delete performs a data dependency check on existence of the node. Performing a merge
78 // are really performing a write.
84 node.updateValue(LogicalOperation.MERGE, value);
89 void verifyValue(final NormalizedNode<?, ?> writtenValue) {
90 verifyWrittenValue(writtenValue);
94 void recursivelyVerifyStructure(final NormalizedNode<?, ?> value) {
95 verifyWrittenValue(value);
98 private void verifyWrittenValue(final NormalizedNode<?, ?> value) {
99 checkArgument(nodeClass.isInstance(value), "Expected an instance of %s, have %s", nodeClass, value);