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/**
* Copyright (c) 2017-2018 ZTE Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the Apache License, Version 2.0
* and the Eclipse Public License v1.0 which both accompany this distribution,
* and are available at http://www.eclipse.org/legal/epl-v10.html
* and http://www.apache.org/licenses/LICENSE-2.0
*
* Contributors:
* ZTE - initial API and implementation and/or initial documentation
*/
package org.onap.sdc.workflowdesigner.parser;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.onap.sdc.workflowdesigner.model.DataObject;
import org.onap.sdc.workflowdesigner.model.Element;
import org.onap.sdc.workflowdesigner.model.EndEvent;
import org.onap.sdc.workflowdesigner.model.ErrorEndEvent;
import org.onap.sdc.workflowdesigner.model.ErrorStartEvent;
import org.onap.sdc.workflowdesigner.model.ExclusiveGateway;
import org.onap.sdc.workflowdesigner.model.IntermediateCatchEvent;
import org.onap.sdc.workflowdesigner.model.ParallelGateway;
import org.onap.sdc.workflowdesigner.model.Parameter;
import org.onap.sdc.workflowdesigner.model.Process;
import org.onap.sdc.workflowdesigner.model.RestServiceTask;
import org.onap.sdc.workflowdesigner.model.ScriptTask;
import org.onap.sdc.workflowdesigner.model.SequenceFlow;
import org.onap.sdc.workflowdesigner.model.ServiceTask;
import org.onap.sdc.workflowdesigner.model.StartEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
public class Bpmn4ToscaJsonParser {
private static Logger log = LoggerFactory.getLogger(Bpmn4ToscaJsonParser.class);
private static ObjectMapper MAPPER = new ObjectMapper();
private Map<String, JsonNode> restConfigMap = new HashMap<String, JsonNode>();
static {
MAPPER.enable(SerializationFeature.INDENT_OUTPUT);
MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
public Process parse(String processName, URI jsonFileUrl)
throws JsonParseException, JsonMappingException, MalformedURLException, IOException {
Process process = new Process(processName);
JsonNode rootNode = MAPPER.readValue(jsonFileUrl.toURL(), JsonNode.class);
log.debug("Creating Process models...");
// JsonNode nodes = rootNode.get(JsonKeys.NODES);
JsonNode data = rootNode.get(JsonKeys.DATA);
if(null == data) {
return process;
}
JsonNode nodes = data.get(JsonKeys.NODES);
if (nodes == null) {
return process;
}
this.loadConfigs(rootNode.get(JsonKeys.CONFIGS));
Iterator<JsonNode> iter = nodes.iterator();
while (iter.hasNext()) {
JsonNode jsonNode = (JsonNode) iter.next();
// get element
Element element = createElementFromJson(jsonNode);
process.getElementList().add(element);
// get sequence flows
List<SequenceFlow> flowList = getSequenceFlows(jsonNode);
process.getSequenceFlowList().addAll(flowList);
// add dataObject
if (element instanceof StartEvent) {
List<DataObject> dataObjects = this.getDataObject((StartEvent) element);
process.getDataObjectList().addAll(dataObjects);
}
}
return process;
}
private List<DataObject> getDataObject(StartEvent startEvent) {
List<DataObject> dataObjects = new ArrayList<DataObject>();
for (Parameter parameter : startEvent.getParameters()) {
DataObject dataObject = new DataObject();
dataObject.setId(parameter.getName());
dataObject.setName(parameter.getName());
dataObject.setValue((String) parameter.getValue());
dataObjects.add(dataObject);
}
return dataObjects;
}
private void loadConfigs(JsonNode config) {
if(config == null) {
return;
}
loadRestConfigs(config.get(JsonKeys.REST_CONFIGS));
}
private void loadRestConfigs(JsonNode restConfigs) {
if(restConfigs == null) {
return;
}
Iterator<JsonNode> iter = restConfigs.iterator();
while (iter.hasNext()) {
JsonNode restConfig = (JsonNode) iter.next();
String configId = getValueFromJsonNode(restConfig, JsonKeys.ID);
restConfigMap.put(configId, restConfig);
}
}
private List<SequenceFlow> getSequenceFlows(JsonNode jsonNode) {
List<SequenceFlow> flowList = new ArrayList<SequenceFlow>();
String elementId = getValueFromJsonNode(jsonNode, JsonKeys.ID);
JsonNode connectionsNode = jsonNode.get(JsonKeys.CONNECTIONS);
Iterator<JsonNode> iter = connectionsNode.iterator();
while (iter.hasNext()) {
JsonNode connectionEntry = (JsonNode) iter.next();
String targetRef = getValueFromJsonNode(connectionEntry, JsonKeys.TARGET_REF);
String condition = getValueFromJsonNode(connectionEntry, JsonKeys.CONDITION);
SequenceFlow flow = new SequenceFlow();
flow.setId(elementId + targetRef);
flow.setSourceRef(elementId);
flow.setTargetRef(targetRef);
flow.setCondition(condition);
flowList.add(flow);
}
return flowList;
}
protected Element createElementFromJson(JsonNode jsonNode)
throws JsonParseException, JsonMappingException, IOException {
String jsonObject = jsonNode.toString();
Element element;
String nodeType = getValueFromJsonNode(jsonNode, JsonKeys.TYPE);
if (nodeType == null) {
log.warn("Ignoring node: type is null");
return null;
}
switch (nodeType) {
case "startEvent":
element = MAPPER.readValue(jsonObject, StartEvent.class);
break;
case "endEvent":
element = MAPPER.readValue(jsonObject, EndEvent.class);
break;
case "errorStartEvent":
element = MAPPER.readValue(jsonObject, ErrorStartEvent.class);
break;
case "errorEndEvent":
element = MAPPER.readValue(jsonObject, ErrorEndEvent.class);
break;
case "intermediateCatchEvent":
element = MAPPER.readValue(jsonObject, IntermediateCatchEvent.class);
break;
case "serviceTask":
element = MAPPER.readValue(jsonObject, ServiceTask.class);
break;
case "restTask":
// element = this.createRestServiceTask(jsonObject);
element = MAPPER.readValue(jsonObject, RestServiceTask.class);
break;
case "scriptTask":
element = MAPPER.readValue(jsonObject, ScriptTask.class);
break;
case "exclusiveGateway":
element = MAPPER.readValue(jsonObject, ExclusiveGateway.class);
break;
case "parallelGateway":
element = MAPPER.readValue(jsonObject, ParallelGateway.class);
break;
default:
log.warn("Ignoring node: type '" + nodeType + "' is unkown");
return null;
}
return element;
}
private String getValueFromJsonNode(JsonNode jsonNode, String key) {
return jsonNode.get(key) == null ? null : jsonNode.get(key).asText();
}
}
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