content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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.
   */
  package org.activiti.validation.validator.impl;
  
  import java.util.List;
  import org.activiti.bpmn.model.BpmnModel;
  import org.activiti.bpmn.model.EventSubProcess;
  import org.activiti.bpmn.model.Process;
  import org.activiti.bpmn.model.StartEvent;
  import org.activiti.bpmn.model.SubProcess;
  import org.activiti.validation.ValidationError;
  import org.activiti.validation.validator.Problems;
  import org.activiti.validation.validator.ProcessLevelValidator;
  
  /**
  
   */
  public class SubprocessValidator extends ProcessLevelValidator {
  
      @Override
      protected void executeValidation(BpmnModel bpmnModel, Process process, List<ValidationError> errors) {
          List<SubProcess> subProcesses = process.findFlowElementsOfType(SubProcess.class);
          for (SubProcess subProcess : subProcesses) {
              if (!(subProcess instanceof EventSubProcess)) {
                  // Verify start events
                  List<StartEvent> startEvents = process.findFlowElementsInSubProcessOfType(
                      subProcess,
                      StartEvent.class,
                      false
                  );
                  if (startEvents.size() > 1) {
                      addError(errors, Problems.SUBPROCESS_MULTIPLE_START_EVENTS, process, subProcess);
                  }
  
                  for (StartEvent startEvent : startEvents) {
                      if (!startEvent.getEventDefinitions().isEmpty()) {
                          addError(
                              errors,
                              Problems.SUBPROCESS_START_EVENT_EVENT_DEFINITION_NOT_ALLOWED,
                              process,
                              startEvent
                          );
                      }
                  }
              }
          }
      }
  }
  