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.PathArgument;
13 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
14 import org.opendaylight.yangtools.yang.data.api.schema.tree.StoreTreeNode;
15 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
16 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
19 * Operation responsible for applying {@link ModifiedNode} on tree.
21 * Operation is composite - operation on top level node consists of
22 * suboperations on child nodes. This allows to walk operation hierarchy and
23 * invoke suboperations independently.
25 * <b>Implementation notes</b>
28 * Implementations MUST expose all nested suboperations which operates on child
29 * nodes expose via {@link #getChild(PathArgument)} method.
30 * <li>Same suboperations SHOULD be used when invoked via
31 * {@link #apply(ModifiedNode, Optional)} if applicable.
34 * Hierarchical composite operation which is responsible for applying
35 * modification on particular subtree and creating updated subtree
37 abstract class ModificationApplyOperation implements StoreTreeNode<ModificationApplyOperation> {
40 * Implementation of this operation must be stateless and must not change
41 * state of this object.
44 * NodeModification to be applied
46 * Store Metadata Node on which NodeModification should be
48 * @param version New subtree version of parent node
49 * @throws IllegalArgumentException
50 * If it is not possible to apply Operation on provided Metadata
52 * @return new {@link StoreMetadataNode} if operation resulted in updating
53 * node, {@link Optional#absent()} if {@link ModifiedNode}
54 * resulted in deletion of this node.
56 abstract Optional<TreeNode> apply(ModifiedNode modification, Optional<TreeNode> storeMeta, Version version);
60 * Checks if provided node modification could be applied to current metadata node.
62 * @param modification Modification
63 * @param current Metadata Node to which modification should be applied
64 * @return true if modification is applicable
65 * false if modification is no applicable
66 * @throws DataValidationFailedException
68 abstract void checkApplicable(YangInstanceIdentifier path, NodeModification modification, Optional<TreeNode> current) throws DataValidationFailedException;
72 * Performs structural verification of NodeModification, such as writen values / types
73 * uses right structural elements.
75 * @param modification to be verified.
76 * @throws IllegalArgumentException If provided NodeModification does not adhere to the structure.
78 abstract void verifyStructure(ModifiedNode modification) throws IllegalArgumentException;
81 * Returns a suboperation for specified tree node
83 * @return Reference to suboperation for specified tree node, {@link Optional#absent()}
84 * if suboperation is not supported for specified tree node.
87 public abstract Optional<ModificationApplyOperation> getChild(PathArgument child);