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/**
* ============LICENSE_START===================================================
* SPARKY (AAI UI service)
* ============================================================================
* Copyright © 2017 AT&T Intellectual Property.
* Copyright © 2017 Amdocs
* All rights reserved.
* ============================================================================
* 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.
* ============LICENSE_END=====================================================
*
* ECOMP and OpenECOMP are trademarks
* and service marks of AT&T Intellectual Property.
*/
package org.onap.aai.sparky.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.Lists;
/**
* The Class TreeWalker.
*/
public class TreeWalker {
/**
* Convert json to node.
*
* @param json the json
* @return the json node
* @throws JsonProcessingException the json processing exception
* @throws IOException Signals that an I/O exception has occurred.
*/
public JsonNode convertJsonToNode(String json) throws JsonProcessingException, IOException {
ObjectMapper mapper = new ObjectMapper();
if (json == null) {
return null;
}
return mapper.readTree(json);
}
/**
* Walk tree.
*
* @param paths the paths
* @param root the root
*/
public void walkTree(List<String> paths, JsonNode root) {
walker(paths, null, root);
}
/**
* Walker.
*
* @param paths the paths
* @param nodename the nodename
* @param node the node
*/
private void walker(List<String> paths, String nodename, JsonNode node) {
if (node == null) {
return;
}
/*
* if ( nodename != null ) { paths.add(nodename); }
*/
// System.out.println("path: " + nameToPrint);
if (node.isObject()) {
Iterator<Map.Entry<String, JsonNode>> iterator = node.fields();
ArrayList<Map.Entry<String, JsonNode>> nodesList = Lists.newArrayList(iterator);
// System.out.println("Walk Tree - root:" + node + ", elements
// keys:" + nodesList);
if (nodesList.isEmpty()) {
if (nodename != null) {
paths.add(nodename);
}
} else {
for (Map.Entry<String, JsonNode> nodEntry : nodesList) {
String name = nodEntry.getKey();
JsonNode newNode = nodEntry.getValue();
if (newNode.isValueNode()) {
if (nodename == null) {
paths.add(name + "=" + newNode.asText());
} else {
paths.add(nodename + "." + name + "=" + newNode.asText());
}
} else {
if (nodename == null) {
walker(paths, name, newNode);
} else {
walker(paths, nodename + "." + name, newNode);
}
}
}
}
} else if (node.isArray()) {
Iterator<JsonNode> arrayItemsIterator = node.elements();
ArrayList<JsonNode> arrayItemsList = Lists.newArrayList(arrayItemsIterator);
for (JsonNode arrayNode : arrayItemsList) {
walker(paths, nodename, arrayNode);
}
} else if (node.isValueNode()) {
paths.add(nodename + "=" + node.asText());
}
}
}
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