2 * Copyright (c) 2013 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.model.api;
10 import com.google.common.base.Optional;
11 import java.util.List;
14 * AugmentationSchema represents augment definition. The "augment" statement
15 * allows a module or submodule to add to the schema tree defined in an external
16 * module, or the current module and its submodules, and to add to the nodes
17 * from a grouping in a "uses" statement.
19 public interface AugmentationSchema extends DataNodeContainer {
22 * Returns when statement
24 * If when condition is present node defined by the parent data definition
25 * statement is only valid when the returned XPath
26 * expression conceptually evaluates to "true"
27 * for a particular instance, then the node defined by the parent data
28 * definition statement is valid; otherwise, it is not.
30 * @return XPath condition
32 RevisionAwareXPath getWhenCondition();
35 * @return textual description of this augment.
37 String getDescription();
40 * @return textual cross-reference to an external document that provides
41 * additional information relevant to this node.
43 String getReference();
46 * @return actual status of this node.
51 * @return SchemaPath that identifies a node in the schema tree. This node
52 * is called the augment's target node. The target node MUST be
53 * either a container, list, choice, case, input, output, or
54 * notification node. It is augmented with the nodes defined as
55 * child nodes of this AugmentationSchema.
57 SchemaPath getTargetPath();
60 * @return collection of all unknown nodes defined in this augmentation
62 List<UnknownSchemaNode> getUnknownSchemaNodes();
65 * Returns Augmentation Definition from which this augmentation is derived
66 * if augmentation was added transitively via augmented uses.
68 * @return Augmentation Definition from which this augmentation is derived
69 * if augmentation was added transitively via augmented uses.
71 Optional<AugmentationSchema> getOriginalDefinition();