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 org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
12 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
15 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
16 import org.opendaylight.yangtools.yang.data.api.schema.tree.IncorrectDataStructureException;
17 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.MutableTreeNode;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
20 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
21 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
22 import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableUnkeyedListEntryNodeBuilder;
23 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
25 final class UnkeyedListModificationStrategy extends SchemaAwareApplyOperation {
27 private final Optional<ModificationApplyOperation> entryStrategy;
29 protected UnkeyedListModificationStrategy(final ListSchemaNode schema) {
30 entryStrategy = Optional.<ModificationApplyOperation> of(new DataNodeContainerModificationStrategy.UnkeyedListItemModificationStrategy(schema));
39 protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta,
40 final Version version) {
41 return applyWrite(modification, Optional.of(currentMeta), version);
45 protected TreeNode applySubtreeChange(final ModifiedNode modification,
46 final TreeNode currentMeta, final Version version) {
47 throw new UnsupportedOperationException("UnkeyedList does not support subtree change.");
51 protected TreeNode applyWrite(final ModifiedNode modification,
52 final Optional<TreeNode> currentMeta, final Version version) {
53 final NormalizedNode<?, ?> newValue = modification.getWrittenValue();
54 final TreeNode newValueMeta = TreeNodeFactory.createTreeNode(newValue, version);
56 if (modification.getChildren().isEmpty()) {
61 * This is where things get interesting. The user has performed a write and
62 * then she applied some more modifications to it. So we need to make sense
63 * of that an apply the operations on top of the written value. We could have
64 * done it during the write, but this operation is potentially expensive, so
65 * we have left it out of the fast path.
67 * As it turns out, once we materialize the written data, we can share the
68 * code path with the subtree change. So let's create an unsealed TreeNode
69 * and run the common parts on it -- which end with the node being sealed.
71 final MutableTreeNode mutable = newValueMeta.mutable();
72 mutable.setSubtreeVersion(version);
74 @SuppressWarnings("rawtypes")
75 final NormalizedNodeContainerBuilder dataBuilder = ImmutableUnkeyedListEntryNodeBuilder
76 .create((UnkeyedListEntryNode) newValue);
78 return mutateChildren(mutable, dataBuilder, version, modification.getChildren());
82 * Applies write/remove diff operation for each modification child in modification subtree.
83 * Operation also sets the Data tree references for each Tree Node (Index Node) in meta (MutableTreeNode) structure.
85 * @param meta MutableTreeNode (IndexTreeNode)
86 * @param data DataBuilder
87 * @param nodeVersion Version of TreeNode
88 * @param modifications modification operations to apply
89 * @return Sealed immutable copy of TreeNode structure with all Data Node references set.
91 @SuppressWarnings({ "rawtypes", "unchecked" })
92 private TreeNode mutateChildren(final MutableTreeNode meta, final NormalizedNodeContainerBuilder data,
93 final Version nodeVersion, final Iterable<ModifiedNode> modifications) {
95 for (ModifiedNode mod : modifications) {
96 final PathArgument id = mod.getIdentifier();
97 final Optional<TreeNode> cm = meta.getChild(id);
99 Optional<TreeNode> result = resolveChildOperation(id).apply(mod, cm, nodeVersion);
100 if (result.isPresent()) {
101 final TreeNode tn = result.get();
103 data.addChild(tn.getData());
105 meta.removeChild(id);
106 data.removeChild(id);
110 meta.setData(data.build());
115 public Optional<ModificationApplyOperation> getChild(final PathArgument child) {
116 if (child instanceof NodeIdentifier) {
117 return entryStrategy;
119 return Optional.absent();
123 protected void verifyWrittenStructure(final NormalizedNode<?, ?> writtenValue) {
128 protected void checkSubtreeModificationApplicable(final YangInstanceIdentifier path, final NodeModification modification,
129 final Optional<TreeNode> current) throws IncorrectDataStructureException {
130 throw new IncorrectDataStructureException(path, "Subtree modification is not allowed.");