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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 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.crud.event.envelope;
import javax.ws.rs.core.Response;
import org.onap.crud.event.GraphEvent;
import org.onap.crud.event.GraphEventEdge;
import org.onap.crud.event.GraphEventVertex;
import org.onap.crud.exception.CrudException;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
/**
* Defines the top-level structure of the Gizmo events. Primarily serves as a wrapper for the graph details and includes
* an event header to describe and identify the event.
*/
public class GraphEventEnvelope {
private GraphEventHeader header;
private GraphEvent body;
private JsonElement policyViolations;
private static final Gson gson = new GsonBuilder().disableHtmlEscaping().setPrettyPrinting().create();
/**
* Construct the event.
*
* @param header the event header to describe the event
* @param body the body of the event with graph details
*/
public GraphEventEnvelope(GraphEventHeader header, GraphEvent body) {
this.header = header;
this.body = body;
}
/**
* Construct the envelope header from the provided GraphEvent.
*
* @param event the graph event for a vertex or edge operation
*/
public GraphEventEnvelope(GraphEvent event) {
this.header = new GraphEventHeader.Builder().requestId(event.getTransactionId())
.validationEntityType(getType(event)).build();
this.body = event;
}
public GraphEvent getBody() {
return body;
}
public GraphEventHeader getHeader() {
return header;
}
public JsonElement getPolicyViolations() {
return policyViolations != null ? policyViolations : new JsonArray();
}
/**
* Serializes this object into a JSON string representation.
*
* @return a JSON format string representation of this object.
*/
public String toJson() {
return gson.toJson(this);
}
/**
* Deserializes a JSON string into a GraphEventEnvelope object.
*
* @param json the JSON string
* @return a GraphEventEnvelope object
* @throws CrudException
*/
public static GraphEventEnvelope fromJson(String json) throws CrudException {
try {
if (json == null || json.isEmpty()) {
throw new CrudException("Empty or null JSON string.", Response.Status.BAD_REQUEST);
}
return gson.fromJson(json, GraphEventEnvelope.class);
} catch (Exception ex) {
throw new CrudException("Unable to parse JSON string: " + json, Response.Status.BAD_REQUEST);
}
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return this.toJson();
}
private String getType(GraphEvent event) {
GraphEventVertex vertex = event.getVertex();
GraphEventEdge edge = event.getEdge();
if (vertex != null) {
return vertex.getType();
} else if (edge != null) {
return edge.getType();
}
return null;
}
}
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