org.onosproject.yang.runtime.DefaultDataNodeWalker Maven / Gradle / Ivy
/*
* Copyright 2017-present Open Networking Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.yang.runtime;
import org.onosproject.yang.model.DataNode;
import org.onosproject.yang.model.InnerNode;
import org.onosproject.yang.model.NodeKey;
import java.util.Map;
/**
* Represents implementation of data node walker, which walks the data tree.
*/
public final class DefaultDataNodeWalker {
// Forbid construction.
private DefaultDataNodeWalker() {
}
/**
* Walks the data node tree from given node.
*
* @param listener data node listener implemented by the protocol
* @param node root node of data tree
*/
public static void walk(DataNodeListener listener, DataNode node) {
listener.enterDataNode(node);
// Walking all child's of given root node.
walkChildNode(listener, node);
listener.exitDataNode(node);
}
/**
* Walks the all child nodes of given root node.
*
* @param listener data node listener implemented by the protocol
* @param node root node of data tree
*/
private static void walkChildNode(DataNodeListener listener, DataNode node) {
Map childMap;
if (node instanceof InnerNode) {
childMap = ((InnerNode) node).childNodes();
for (Map.Entry entry : childMap.entrySet()) {
DataNode n = entry.getValue();
listener.enterDataNode(n);
if (n instanceof InnerNode) {
walkChildNode(listener, n);
}
listener.exitDataNode(n);
}
}
}
}