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/*-
* ============LICENSE_START=======================================================
* ONAP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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=========================================================
*/
package org.openecomp.sdnc.config.generator.tool;
import java.io.IOException;
import java.io.StringWriter;
import java.util.Iterator;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.resource.loader.StringResourceLoader;
import org.apache.velocity.runtime.resource.util.StringResourceRepository;
import org.openecomp.sdnc.config.generator.ConfigGeneratorConstant;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
public class MergeTool {
private static final EELFLogger log = EELFManager.getInstance().getLogger(MergeTool.class);
public static String mergeMap2TemplateData(String template, Map< String, String> dataMap ){
log.info("MergeMap2TemplateData Template :"+ template + " Maps :"+ dataMap);
StringWriter writer = new StringWriter();
VelocityEngine ve = new VelocityEngine();
ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "string");
ve.addProperty("string.resource.loader.class", StringResourceLoader.class.getName());
ve.addProperty("string.resource.loader.repository.static", "false");
ve.init();
StringResourceRepository repo = (StringResourceRepository)ve.getApplicationAttribute(StringResourceLoader.REPOSITORY_NAME_DEFAULT);
repo.putStringResource("TemplateResource", template);
Template t = ve.getTemplate("TemplateResource");
VelocityContext context = new VelocityContext();
Iterator<Map.Entry<String, String>> entries = dataMap.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry<String, String> entry = entries.next();
context.put(entry.getKey(), entry.getValue());
}
t.merge(context, writer);
return writer.toString();
}
public static String mergeJson2TemplateData(String template, String jsonData, String templateType, String doPrettyOutput) throws JsonParseException, JsonMappingException, IOException{
String mergedData = template;
if( StringUtils.isNotBlank(template) && StringUtils.isNotBlank(jsonData)){
Velocity.init();
ObjectMapper mapper = new ObjectMapper();
CustomJsonNodeFactory f = new CustomJsonNodeFactory();
mapper.setNodeFactory(f);
JsonNode jsonObj = mapper.readValue(jsonData, JsonNode.class);
VelocityContext context = new VelocityContext();
Iterator<String> ii = jsonObj.fieldNames();
while (ii.hasNext()) {
String key = ii.next();
context.put(key, jsonObj.get(key));
}
StringWriter writer = new StringWriter();
Velocity.evaluate(context, writer, "TemplateData", template);
writer.flush();
mergedData = writer.toString();
if(StringUtils.isNotBlank(templateType) && StringUtils.isNotBlank(doPrettyOutput)
&& ConfigGeneratorConstant.Y.equalsIgnoreCase(doPrettyOutput)
&& ( ConfigGeneratorConstant.DATA_TYPE_JSON.equalsIgnoreCase(templateType)
|| ConfigGeneratorConstant.DATA_TYPE_XML.equalsIgnoreCase(templateType)) ){
// Perform Prettying
}
}
return mergedData;
}
}
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