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.engine.impl.bpmn.behavior;
  
  import java.util.List;
  import org.activiti.bpmn.model.Signal;
  import org.activiti.bpmn.model.SignalEventDefinition;
  import org.activiti.engine.delegate.DelegateExecution;
  import org.activiti.engine.delegate.Expression;
  import org.activiti.engine.history.DeleteReason;
  import org.activiti.engine.impl.context.Context;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntity;
  import org.activiti.engine.impl.persistence.entity.EventSubscriptionEntityManager;
  import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
  import org.activiti.engine.impl.persistence.entity.SignalEventSubscriptionEntity;
  import org.apache.commons.lang3.StringUtils;
  
  public class IntermediateCatchSignalEventActivityBehavior extends IntermediateCatchEventActivityBehavior {
  
      private static final long serialVersionUID = 1L;
  
      protected SignalEventDefinition signalEventDefinition;
      protected Signal signal;
  
      public IntermediateCatchSignalEventActivityBehavior(SignalEventDefinition signalEventDefinition, Signal signal) {
          this.signalEventDefinition = signalEventDefinition;
          this.signal = signal;
      }
  
      public void execute(DelegateExecution execution) {
          CommandContext commandContext = Context.getCommandContext();
          ExecutionEntity executionEntity = (ExecutionEntity) execution;
  
          String signalName = null;
          if (StringUtils.isNotEmpty(signalEventDefinition.getSignalRef())) {
              signalName = signalEventDefinition.getSignalRef();
          } else {
              Expression signalExpression = commandContext
                  .getProcessEngineConfiguration()
                  .getExpressionManager()
                  .createExpression(signalEventDefinition.getSignalExpression());
              signalName = signalExpression.getValue(execution).toString();
          }
  
          commandContext.getEventSubscriptionEntityManager().insertSignalEvent(signalName, signal, executionEntity);
      }
  
      @Override
      public void trigger(DelegateExecution execution, String triggerName, Object triggerData) {
          ExecutionEntity executionEntity = deleteSignalEventSubscription(execution);
          leaveIntermediateCatchEvent(executionEntity);
      }
  
      @Override
      public void eventCancelledByEventGateway(DelegateExecution execution) {
          deleteSignalEventSubscription(execution);
          Context.getCommandContext()
              .getExecutionEntityManager()
              .deleteExecutionAndRelatedData((ExecutionEntity) execution, DeleteReason.EVENT_BASED_GATEWAY_CANCEL);
      }
  
      protected ExecutionEntity deleteSignalEventSubscription(DelegateExecution execution) {
          ExecutionEntity executionEntity = (ExecutionEntity) execution;
  
          String eventName = null;
          if (signal != null) {
              eventName = signal.getName();
          } else {
              eventName = signalEventDefinition.getSignalRef();
          }
  
          EventSubscriptionEntityManager eventSubscriptionEntityManager =
              Context.getCommandContext().getEventSubscriptionEntityManager();
          List<EventSubscriptionEntity> eventSubscriptions = executionEntity.getEventSubscriptions();
          for (EventSubscriptionEntity eventSubscription : eventSubscriptions) {
              if (
                  eventSubscription instanceof SignalEventSubscriptionEntity &&
                  eventSubscription.getEventName().equals(eventName)
              ) {
                  eventSubscriptionEntityManager.delete(eventSubscription);
              }
          }
          return executionEntity;
      }
  }
  