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/*
* Copyright 2014 Bazaarvoice, Inc.
*
* 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.onap.sdnc.apps.pomba.networkdiscovery.service.util;
import com.bazaarvoice.jolt.Chainr;
import com.bazaarvoice.jolt.JsonUtils;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import org.onap.pomba.common.datatypes.DataQuality;
import org.onap.sdnc.apps.pomba.networkdiscovery.datamodel.Attribute;
public class TransformationUtil {
private static final String CONFIG_JOLT = "config/jolt";
private static final String EMPTY_STRING = "";
private TransformationUtil() {
throw new IllegalStateException("Utility class");
}
/**
* Transforms the sourceJson using the jolt specification for the given resourceType.
*
* @param sourceJson
* @param resourceType
* @return
*/
public static String transform(String sourceJson, String resourceType) {
Object sourceObject = JsonUtils.jsonToObject(sourceJson);
List<Object> chainrSpecJSON = JsonUtils.filepathToList(CONFIG_JOLT + File.separator + resourceType + ".json");
Chainr chainr = Chainr.fromSpec(chainrSpecJSON);
Object output = chainr.transform(sourceObject);
return JsonUtils.toJsonString(output);
}
/**
* Converts the second level of JsonElements from the given json to a list of
* Network Discovery Attributes.
*
* @param json
* @return
*/
public static List<Attribute> toAttributeList(String json) {
JsonParser parser = new JsonParser();
JsonElement elem = parser.parse(json);
Set<Entry<String, JsonElement>> entrySet = elem.getAsJsonObject().entrySet();
List<Attribute> result = new ArrayList<>();
Iterator<Entry<String, JsonElement>> iter = entrySet.iterator();
while (iter.hasNext()) {
Entry<String, JsonElement> next = iter.next();
JsonElement vserverElem = next.getValue();
Set<Entry<String, JsonElement>> vserverEntrySet = vserverElem.getAsJsonObject().entrySet();
Iterator<Entry<String, JsonElement>> vserverIter = vserverEntrySet.iterator();
while (vserverIter.hasNext()) {
Entry<String, JsonElement> vserverNext = vserverIter.next();
Attribute attr = new Attribute();
attr.setName(vserverNext.getKey());
if (vserverNext.getValue().isJsonNull()) {
attr.setValue(EMPTY_STRING);
} else {
attr.setValue(vserverNext.getValue().getAsString());
}
attr.setDataQuality(DataQuality.ok());
result.add(attr);
}
}
return result;
}
}
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