sdc-workflow-designer-server/src/main/java/org/onap/sdc/workflowdesigner/parser/Bpmn4ToscaJsonParser.java

   1 /**\r
   2  * Copyright (c) 2017 ZTE Corporation.\r
   3  * All rights reserved. This program and the accompanying materials\r
   4  * are made available under the Apache License, Version 2.0\r
   5  * and the Eclipse Public License v1.0 which both accompany this distribution,\r
   6  * and are available at http://www.eclipse.org/legal/epl-v10.html\r
   7  * and http://www.apache.org/licenses/LICENSE-2.0\r
   8  *\r
   9  * Contributors:\r
  10  *     ZTE - initial API and implementation and/or initial documentation\r
  11  */\r
  12 package org.onap.sdc.workflowdesigner.parser;\r
  13 \r
  14 import java.io.IOException;\r
  15 import java.net.MalformedURLException;\r
  16 import java.net.URI;\r
  17 import java.util.ArrayList;\r
  18 import java.util.HashMap;\r
  19 import java.util.Iterator;\r
  20 import java.util.List;\r
  21 import java.util.Map;\r
  22 \r
  23 import org.onap.sdc.workflowdesigner.model.DataObject;\r
  24 import org.onap.sdc.workflowdesigner.model.Element;\r
  25 import org.onap.sdc.workflowdesigner.model.EndEvent;\r
  26 import org.onap.sdc.workflowdesigner.model.ErrorEndEvent;\r
  27 import org.onap.sdc.workflowdesigner.model.ErrorStartEvent;\r
  28 import org.onap.sdc.workflowdesigner.model.ExclusiveGateway;\r
  29 import org.onap.sdc.workflowdesigner.model.IntermediateCatchEvent;\r
  30 import org.onap.sdc.workflowdesigner.model.ParallelGateway;\r
  31 import org.onap.sdc.workflowdesigner.model.Parameter;\r
  32 import org.onap.sdc.workflowdesigner.model.Process;\r
  33 import org.onap.sdc.workflowdesigner.model.RestServiceTask;\r
  34 import org.onap.sdc.workflowdesigner.model.ScriptTask;\r
  35 import org.onap.sdc.workflowdesigner.model.SequenceFlow;\r
  36 import org.onap.sdc.workflowdesigner.model.ServiceTask;\r
  37 import org.onap.sdc.workflowdesigner.model.StartEvent;\r
  38 import org.slf4j.Logger;\r
  39 import org.slf4j.LoggerFactory;\r
  40 \r
  41 import com.fasterxml.jackson.core.JsonParseException;\r
  42 import com.fasterxml.jackson.databind.DeserializationFeature;\r
  43 import com.fasterxml.jackson.databind.JsonMappingException;\r
  44 import com.fasterxml.jackson.databind.JsonNode;\r
  45 import com.fasterxml.jackson.databind.ObjectMapper;\r
  46 import com.fasterxml.jackson.databind.SerializationFeature;\r
  47 \r
  48 public class Bpmn4ToscaJsonParser {\r
  49 \r
  50     private static Logger log = LoggerFactory.getLogger(Bpmn4ToscaJsonParser.class);\r
  51 \r
  52     private static ObjectMapper MAPPER = new ObjectMapper();\r
  53     \r
  54     private Map<String, JsonNode> restConfigMap = new HashMap<String, JsonNode>();\r
  55 \r
  56     static {\r
  57         MAPPER.enable(SerializationFeature.INDENT_OUTPUT);\r
  58         MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);\r
  59     }\r
  60 \r
  61     public Process parse(String processName, URI jsonFileUrl)\r
  62             throws JsonParseException, JsonMappingException, MalformedURLException, IOException {\r
  63         Process process = new Process(processName);\r
  64 \r
  65         JsonNode rootNode = MAPPER.readValue(jsonFileUrl.toURL(), JsonNode.class);\r
  66 \r
  67         log.debug("Creating Process models...");\r
  68         JsonNode nodes = rootNode.get(JsonKeys.NODES);\r
  69         if (nodes == null) {\r
  70             return process;\r
  71         }\r
  72         \r
  73         this.loadConfigs(rootNode.get(JsonKeys.CONFIGS));\r
  74 \r
  75         Iterator<JsonNode> iter = nodes.iterator();\r
  76         while (iter.hasNext()) {\r
  77             JsonNode jsonNode = (JsonNode) iter.next();\r
  78 \r
  79             // get element\r
  80             Element element = createElementFromJson(jsonNode);\r
  81             process.getElementList().add(element);\r
  82 \r
  83             // get sequence flows\r
  84             List<SequenceFlow> flowList = getSequenceFlows(jsonNode);\r
  85             process.getSequenceFlowList().addAll(flowList);\r
  86 \r
  87             // add dataObject\r
  88             if (element instanceof StartEvent) {\r
  89                 List<DataObject> dataObjects = this.getDataObject((StartEvent) element);\r
  90                 process.getDataObjectList().addAll(dataObjects);\r
  91             }\r
  92         }\r
  93 \r
  94         return process;\r
  95 \r
  96     }\r
  97 \r
  98     private List<DataObject> getDataObject(StartEvent startEvent) {\r
  99         List<DataObject> dataObjects = new ArrayList<DataObject>();\r
 100 \r
 101         for (Parameter parameter : startEvent.getParameters()) {\r
 102             DataObject dataObject = new DataObject();\r
 103             dataObject.setId(parameter.getName());\r
 104             dataObject.setName(parameter.getName());\r
 105             dataObject.setValue((String) parameter.getValue());\r
 106 \r
 107             dataObjects.add(dataObject);\r
 108         }\r
 109 \r
 110         return dataObjects;\r
 111     }\r
 112     \r
 113     private void loadConfigs(JsonNode config) {\r
 114         if(config == null) {\r
 115             return;\r
 116         }\r
 117         loadRestConfigs(config.get(JsonKeys.REST_CONFIGS));\r
 118     }\r
 119     \r
 120     private void loadRestConfigs(JsonNode restConfigs) {\r
 121         if(restConfigs == null) {\r
 122             return;\r
 123         }\r
 124         \r
 125         Iterator<JsonNode> iter = restConfigs.iterator();\r
 126         while (iter.hasNext()) {\r
 127             JsonNode restConfig = (JsonNode) iter.next();\r
 128 \r
 129             String configId = getValueFromJsonNode(restConfig, JsonKeys.ID); \r
 130             restConfigMap.put(configId, restConfig);\r
 131         }\r
 132     }\r
 133 \r
 134     private List<SequenceFlow> getSequenceFlows(JsonNode jsonNode) {\r
 135         List<SequenceFlow> flowList = new ArrayList<SequenceFlow>();\r
 136         JsonNode sequenceFlowNodes = jsonNode.get(JsonKeys.SEQUENCE_FLOWS);\r
 137 \r
 138         Iterator<JsonNode> iter = sequenceFlowNodes.iterator();\r
 139         while (iter.hasNext()) {\r
 140             JsonNode connectionEntry = (JsonNode) iter.next();\r
 141             String sourceRef = getValueFromJsonNode(connectionEntry, JsonKeys.SOURCE_REF);\r
 142             String targetRef = getValueFromJsonNode(connectionEntry, JsonKeys.TARGET_REF);\r
 143             String condition = getValueFromJsonNode(connectionEntry, JsonKeys.CONDITION);\r
 144             SequenceFlow flow = new SequenceFlow();\r
 145             flow.setId(sourceRef + targetRef);\r
 146             flow.setSourceRef(sourceRef);\r
 147             flow.setTargetRef(targetRef);\r
 148             flow.setCondition(condition);\r
 149             flowList.add(flow);\r
 150         }\r
 151 \r
 152         return flowList;\r
 153     }\r
 154 \r
 155     protected Element createElementFromJson(JsonNode jsonNode)\r
 156             throws JsonParseException, JsonMappingException, IOException {\r
 157         String jsonObject = jsonNode.toString();\r
 158         Element element;\r
 159 \r
 160         String nodeType = getValueFromJsonNode(jsonNode, JsonKeys.TYPE);\r
 161         if (nodeType == null) {\r
 162           log.warn("Ignoring node: type is null");\r
 163           return null;\r
 164         }\r
 165         \r
 166         switch (nodeType) {\r
 167         case "startEvent":\r
 168             element = MAPPER.readValue(jsonObject, StartEvent.class);\r
 169             break;\r
 170         case "endEvent":\r
 171             element = MAPPER.readValue(jsonObject, EndEvent.class);\r
 172             break;\r
 173         case "errorStartEvent":\r
 174             element = MAPPER.readValue(jsonObject, ErrorStartEvent.class);\r
 175             break;\r
 176         case "errorEndEvent":\r
 177             element = MAPPER.readValue(jsonObject, ErrorEndEvent.class);\r
 178             break;\r
 179         case "intermediateCatchEvent":\r
 180             element = MAPPER.readValue(jsonObject, IntermediateCatchEvent.class);\r
 181             break;\r
 182         case "serviceTask":\r
 183             element = MAPPER.readValue(jsonObject, ServiceTask.class);\r
 184             break;\r
 185         case "restTask":\r
 186             element = this.createRestServiceTask(jsonObject);\r
 187             break;\r
 188         case "scriptTask":\r
 189             element = MAPPER.readValue(jsonObject, ScriptTask.class);\r
 190             break;\r
 191         case "exclusiveGateway":\r
 192             element = MAPPER.readValue(jsonObject, ExclusiveGateway.class);\r
 193             break;\r
 194         case "parallelGateway":\r
 195             element = MAPPER.readValue(jsonObject, ParallelGateway.class);\r
 196             break;\r
 197         default:\r
 198             log.warn("Ignoring node: type '" + nodeType + "' is unkown");\r
 199             return null;\r
 200         }\r
 201 \r
 202         return element;\r
 203     }\r
 204     \r
 205     private RestServiceTask createRestServiceTask(String jsonObject) throws JsonParseException, JsonMappingException, IOException {\r
 206         RestServiceTask restServiceTask = MAPPER.readValue(jsonObject, RestServiceTask.class);\r
 207         \r
 208         // add baseUrl to relative url\r
 209         String restConfigId = restServiceTask.getRestConfigId();\r
 210         JsonNode restConfig = this.restConfigMap.get(restConfigId);\r
 211         \r
 212         if(restConfig != null) { // while create a new rest task and didnot set method, the restconfig info may be null\r
 213             restServiceTask.setUrl(getValueFromJsonNode(restConfig, JsonKeys.MICROSERVICE_URL));\r
 214             restServiceTask.setServiceName(getValueFromJsonNode(restConfig, JsonKeys.MICROSERVICE_NAME));\r
 215             restServiceTask.setServiceVersion(getValueFromJsonNode(restConfig, JsonKeys.MICROSERVICE_VERSION));\r
 216         }\r
 217         \r
 218         for(Parameter parameter : restServiceTask.getParameters()) {\r
 219             if("body".equals(parameter.getPosition())) {\r
 220                 parameter.setValueSource(null);\r
 221             }\r
 222         }\r
 223         \r
 224         return restServiceTask;\r
 225     }\r
 226 \r
 227     private String getValueFromJsonNode(JsonNode jsonNode, String key) {\r
 228         return jsonNode.get(key) == null ? null : jsonNode.get(key).asText();\r
 229     }\r
 230 \r
 231 }\r