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.ActivitiListener;
  import org.activiti.bpmn.model.BaseElement;
  import org.activiti.bpmn.model.BpmnModel;
  import org.activiti.bpmn.model.FlowElement;
  import org.activiti.bpmn.model.ImplementationType;
  import org.activiti.bpmn.model.Process;
  import org.activiti.validation.ValidationError;
  import org.activiti.validation.validator.Problems;
  import org.activiti.validation.validator.ProcessLevelValidator;
  
  /**
  
   */
  public class ExecutionListenerValidator extends ProcessLevelValidator {
  
      @Override
      protected void executeValidation(BpmnModel bpmnModel, Process process, List<ValidationError> errors) {
          validateListeners(process, process, process.getExecutionListeners(), errors);
  
          for (FlowElement flowElement : process.getFlowElements()) {
              validateListeners(process, flowElement, flowElement.getExecutionListeners(), errors);
          }
      }
  
      protected void validateListeners(
          Process process,
          BaseElement baseElement,
          List<ActivitiListener> listeners,
          List<ValidationError> errors
      ) {
          if (listeners != null) {
              for (ActivitiListener listener : listeners) {
                  if (listener.getImplementation() == null || listener.getImplementationType() == null) {
                      addError(errors, Problems.EXECUTION_LISTENER_IMPLEMENTATION_MISSING, process, baseElement);
                  }
                  if (
                      listener.getOnTransaction() != null &&
                      ImplementationType.IMPLEMENTATION_TYPE_EXPRESSION.equals(listener.getImplementationType())
                  ) {
                      addError(errors, Problems.EXECUTION_LISTENER_INVALID_IMPLEMENTATION_TYPE, process, baseElement);
                  }
              }
          }
      }
  }
  