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 java.util.Collection;
12 import org.opendaylight.yangtools.concepts.Identifiable;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
14 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
17 * Internal interface representing a modification action of a particular node.
18 * It is used by the validation code to allow for a read-only view of the
19 * modification tree as we should never modify that during validation.
21 abstract class NodeModification implements Identifiable<PathArgument> {
23 * Get the type of modification.
25 * @return Operation type.
27 abstract LogicalOperation getOperation();
30 * Get the original tree node to which the modification is to be applied.
32 * @return The original node, or {@link Optional#absent()} if the node is
35 abstract Optional<TreeNode> getOriginal();
38 * Get a read-only view of children nodes.
40 * @return Collection of all children nodes.
42 abstract Collection<? extends NodeModification> getChildren();