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/*
* ============LICENSE_START=======================================================
* VES Collector
* ================================================================================
* Copyright (C) 2020-2021 Nokia. 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.onap.dcae.common.model;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.Optional;
/**
* This class is a wrapper for JSONObject, that represents VES event.
* It contains Strings that represents key, that can be found in VES event.
*
* @author Zebek
*/
public class VesEvent {
public static final String VES_UNIQUE_ID = "VESuniqueId";
private static final String COMMON_EVENT_HEADER = "commonEventHeader";
private static final String DOMAIN = "domain";
private static final String STND_DEFINED_NAMESPACE = "stndDefinedNamespace";
private static final String STND_DEFINED_DOMAIN = "stndDefined";
private static final String STND_DEFINED_FIELDS = "stndDefinedFields";
private static final String SCHEMA_REFERENCE = "schemaReference";
private static final String EVENT = "event";
private static final String PARTITION_KEY = "sourceName";
private final JSONObject event;
public VesEvent(JSONObject event) {
this.event = event;
}
public JsonNode asJsonNode() throws JsonProcessingException {
ObjectMapper objectMapper = new ObjectMapper();
return objectMapper.readTree(event.toString());
}
/**
* Returns VES event in form of JSON object.
*
* @return event in form of json Object
*/
public JSONObject asJsonObject() {
return new JSONObject(event.toString());
}
/**
* Returns Domain name from VES event.
*
* @return domain
*/
public String getDomain() {
return getEventHeader().getString(DOMAIN);
}
/**
* Returns event primary key.
* @return a primary key
*/
public String getPK() {
return event.getJSONObject(EVENT).getJSONObject(COMMON_EVENT_HEADER).get(PARTITION_KEY).toString();
}
/**
* Returns schema reference.
* @return a schema reference.
*/
public String getSchemaReference() {
return getStndDefinedFields().getString(SCHEMA_REFERENCE);
}
/**
* Returns stream ID from VES event.
*
* @return stream ID
*/
public String getStreamId() {
String retVal = getDomain();
if (isStdDefinedDomain(retVal)) {
retVal = resolveDomainForStndDefinedEvent();
}
return retVal;
}
/**
* Returns unique ID of VES event.
*
* @return unique ID
*/
public Object getUniqueId() {
return event.get(VES_UNIQUE_ID);
}
/**
* Returns optional stndDefinedNamespace name from VES event.
*
* @return Optional stndDefinedNamespace
*/
public Optional<String> getStndDefinedNamespace() throws JSONException {
return isStdDefinedDomain(getDomain()) ? Optional.ofNullable(getEventHeader())
.map(header -> header.getString(STND_DEFINED_NAMESPACE)) : Optional.empty();
}
/**
* Checks if type of event is same as given in paramaters.
*
* @param type name that will be compared with event type
* @return true or false depending if type given in parameter is same as VES event type
*/
public boolean hasType(String type) {
return this.event.has(type);
}
/**
* Remove Json element from event by key.
* @param key
*/
public void removeElement(String key) {
this.event.remove(key);
}
@Override
public String toString() {
return event.toString();
}
private JSONObject getStndDefinedFields() {
return event
.getJSONObject(EVENT)
.getJSONObject(STND_DEFINED_FIELDS);
}
private String resolveDomainForStndDefinedEvent() {
final JSONObject eventHeader = getEventHeader();
if(eventHeader.has(STND_DEFINED_NAMESPACE)) {
final String domain = eventHeader
.getString(STND_DEFINED_NAMESPACE);
if(domain.isEmpty()) {
throw new StndDefinedNamespaceParameterHasEmptyValueException();
}
return domain;
} else {
throw new StndDefinedNamespaceParameterNotDefinedException();
}
}
private JSONObject getEventHeader() {
return event
.getJSONObject(EVENT)
.getJSONObject(COMMON_EVENT_HEADER);
}
private boolean isStdDefinedDomain(String domain) {
return domain.equals(STND_DEFINED_DOMAIN);
}
}
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