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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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=========================================================
*/
package org.onap.sdnc.dg.loader;
import java.io.File;
import java.io.IOException;
import java.security.InvalidParameterException;
import java.util.ArrayList;
import java.util.List;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DGXMLGenerator {
private static final Logger logger = LoggerFactory.getLogger(DGXMLGenerator.class);
private static final String STRING_ENCODING = "utf-8";
private static final String JS_INTERFACE_DG_CONVERTOR = "dgconverter";
private static final String JS_METHOD_GET_NODE_TO_XML = "getNodeToXml";
private static final String GENERATOR_TEMPLATE_FILE = "js/dg_xml2json.js";
public void generateXMLFromJSON(String jsonPath, String xmlpath, String propertyPath) {
try {
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("JavaScript");
if (!(engine instanceof Invocable)) {
logger.error("Invoking methods is not supported.");
return;
}
Invocable inv = (Invocable) engine;
String js = IOUtils.toString(DGXMLGenerator.class.getClassLoader()
.getResourceAsStream(GENERATOR_TEMPLATE_FILE), STRING_ENCODING);
engine.eval(js);
Object dgconverter = engine.get(JS_INTERFACE_DG_CONVERTOR);
List<File> files = new ArrayList<>();
if (dgconverter != null) {
File jsonPathFile = new File(jsonPath);
if (jsonPathFile.isDirectory()) {
String[] extensions = new String[]{"json", "JSON"};
files = (List<File>) FileUtils.listFiles(jsonPathFile, extensions, true);
} else if (jsonPathFile.isFile()) {
files.add(jsonPathFile);
} else {
throw new InvalidParameterException("Failed to get the nature of the JSON path :" + jsonPath);
}
logger.info("JSON Files identified " + files.size());
if (!files.isEmpty()) {
boolean isXmlPathDeleted = FileUtils.deleteQuietly(new File(xmlpath));
logger.info("Cleaning old DG XML under : " + xmlpath + ", delete status :"
+ isXmlPathDeleted);
generateXmls(xmlpath, inv, dgconverter, files);
} else {
logger.info("No JSON Files to generate XML");
}
} else {
logger.error("Couldn't get Java Script Engine..");
}
} catch (Exception e) {
logger.error("Failed to generate generateXMLFromJSON", e);
}
}
private void generateXmls(String xmlpath, Invocable inv, Object dgconverter, List<File> files)
throws IOException, ScriptException, NoSuchMethodException {
for (File file : files) {
String dgJson = FileUtils.readFileToString(file, STRING_ENCODING);
logger.info("Generating XML from :" + file.getName());
String xmlFileName =
xmlpath + "/" + file.getName().replace(".json", ".xml");
Object dgXMl =
inv.invokeMethod(dgconverter, JS_METHOD_GET_NODE_TO_XML, dgJson);
tryWriteXml(xmlFileName, dgXMl);
}
}
private void tryWriteXml(String xmlFileName, Object dgXMl) throws IOException {
if (dgXMl != null) {
File xmlFile = new File(xmlFileName);
FileUtils.writeStringToFile(xmlFile, dgXMl.toString(), STRING_ENCODING);
logger.info("Generated XML File under :" + xmlFile.getCanonicalPath());
}
}
public static void main(String[] args) {
try {
DGXMLGenerator application = new DGXMLGenerator();
String jsonPath;
String xmlPath;
String propertyPath = null;
// Generate, GenerateLoad, GenerateLoadActivate
if (args != null && args.length >= 2) {
// e.g "src/main/resources/json" "src/test/resources/xml"
logger.info("DGXML Conversion Started with arguments :" + args[0] + ":" + args[1]);
jsonPath = args[0];
xmlPath = args[1];
} else {
throw new InvalidParameterException("Required inputs are missing <jsonPath> <xmlPath>");
}
application.generateXMLFromJSON(jsonPath, xmlPath, propertyPath);
logger.info("DGXML Conversion Completed...");
} catch (Exception e) {
logger.error("Failed in DG XML Generation", e);
}
}
}
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