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/**
* Copyright (c) 2017 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.Iterator;
import java.util.List;
import org.onap.sdc.workflowdesigner.model.Element;
import org.onap.sdc.workflowdesigner.model.EndEvent;
import org.onap.sdc.workflowdesigner.model.Process;
import org.onap.sdc.workflowdesigner.model.SequenceFlow;
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();
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);
if (nodes == null) {
return process;
}
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);
}
return process;
}
private List<SequenceFlow> getSequenceFlows(JsonNode jsonNode) {
List<SequenceFlow> flowList = new ArrayList<SequenceFlow>();
JsonNode sequenceFlowNodes = jsonNode.get(JsonKeys.SEQUENCE_FLOWS);
Iterator<JsonNode> iter = sequenceFlowNodes.iterator();
while (iter.hasNext()) {
JsonNode connectionEntry = (JsonNode) iter.next();
String sourceRef = getValueFromJsonNode(connectionEntry, JsonKeys.SOURCE_REF);
String targetRef = getValueFromJsonNode(connectionEntry, JsonKeys.TARGET_REF);
String condition = getValueFromJsonNode(connectionEntry, JsonKeys.CONDITION);
SequenceFlow flow = new SequenceFlow();
flow.setId(sourceRef + targetRef);
flow.setSourceRef(sourceRef);
flow.setTargetRef(targetRef);
flow.setCondition(condition);
flowList.add(flow);
}
return flowList;
}
private String getValueFromJsonNode(JsonNode jsonNode, String key) {
return jsonNode.get(key) == null ? null : jsonNode.get(key).asText();
}
protected Element createElementFromJson(JsonNode jsonNode)
throws JsonParseException, JsonMappingException, IOException {
String jsonObject = jsonNode.toString();
Element element;
String nodeType = getValueFromJsonNode(jsonNode, JsonKeys.TYPE);
switch (nodeType) {
case "startEvent":
element = MAPPER.readValue(jsonObject, StartEvent.class);
break;
case "endEvent":
element = MAPPER.readValue(jsonObject, EndEvent.class);
break;
default:
log.warn("Ignoring node: type '" + nodeType + "' is unkown");
return null;
}
return element;
}
}
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