cn.lzgabel.converter.BpmnBuilder Maven / Gradle / Ivy

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package cn.lzgabel.converter;

import cn.lzgabel.converter.bean.BaseDefinition;
import cn.lzgabel.converter.bean.BpmnElementType;
import cn.lzgabel.converter.bean.Process;
import cn.lzgabel.converter.bean.ProcessDefinition;
import cn.lzgabel.converter.processing.BpmnElementProcessor;
import cn.lzgabel.converter.processing.BpmnElementProcessors;
import io.camunda.zeebe.model.bpmn.Bpmn;
import io.camunda.zeebe.model.bpmn.BpmnModelInstance;
import io.camunda.zeebe.model.bpmn.builder.AbstractBaseElementBuilder;
import io.camunda.zeebe.model.bpmn.builder.ProcessBuilder;
import io.camunda.zeebe.model.bpmn.builder.StartEventBuilder;
import java.util.Optional;
import org.apache.commons.lang3.StringUtils;

/**
 * 〈功能简述〉

 * 〈基于 json 格式自动生成 bpmn 文件〉
 *
 * @author lizhi
 * @since 1.0.0
 */
public class BpmnBuilder {

  public static BpmnModelInstance build(String json) {
    return build(ProcessDefinition.of(json));
  }

  public static BpmnModelInstance build(ProcessDefinition processDefinition) {
    if (processDefinition == null) {
      return null;
    }

    try {
      ProcessBuilder executableProcess = Bpmn.createExecutableProcess();

      Process process = processDefinition.getProcess();
      Optional.ofNullable(process.getName())
          .filter(StringUtils::isNotBlank)
          .ifPresent(executableProcess::name);

      Optional.ofNullable(process.getProcessId())
          .filter(StringUtils::isNotBlank)
          .ifPresent(executableProcess::id);

      StartEventBuilder startEventBuilder = executableProcess.startEvent();
      BaseDefinition processNode = processDefinition.getProcessNode();
      BpmnElementProcessor processor =
          BpmnElementProcessors.getProcessor(BpmnElementType.START_EVENT);
      String lastNode = processor.onCreate(startEventBuilder, processNode);
      processor.moveToNode(startEventBuilder, lastNode).endEvent();
      BpmnModelInstance modelInstance = startEventBuilder.done();
      Bpmn.validateModel(modelInstance);

      return modelInstance;
    } catch (Exception e) {
      e.printStackTrace();
      throw new RuntimeException("创建失败: e=" + e.getMessage());
    }
  }
}