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 com.fasterxml.jackson.databind.node.ObjectNode;
  import org.activiti.engine.ActivitiException;
  import org.activiti.engine.DynamicBpmnConstants;
  import org.activiti.engine.delegate.BpmnError;
  import org.activiti.engine.delegate.DelegateExecution;
  import org.activiti.engine.delegate.Expression;
  import org.activiti.engine.impl.bpmn.helper.ErrorPropagation;
  import org.activiti.engine.impl.bpmn.helper.SkipExpressionUtil;
  import org.activiti.engine.impl.context.Context;
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * ActivityBehavior that evaluates an expression when executed. Optionally, it sets the result of the expression as a variable on the execution.
   *
  
  
  
  
  
   */
  public class ServiceTaskExpressionActivityBehavior extends TaskActivityBehavior {
  
      private static final long serialVersionUID = 1L;
  
      protected String serviceTaskId;
      protected Expression expression;
      protected Expression skipExpression;
      protected String resultVariable;
  
      public ServiceTaskExpressionActivityBehavior(
          String serviceTaskId,
          Expression expression,
          Expression skipExpression,
          String resultVariable
      ) {
          this.serviceTaskId = serviceTaskId;
          this.expression = expression;
          this.skipExpression = skipExpression;
          this.resultVariable = resultVariable;
      }
  
      public void execute(DelegateExecution execution) {
          Object value = null;
          try {
              boolean isSkipExpressionEnabled = SkipExpressionUtil.isSkipExpressionEnabled(execution, skipExpression);
              if (
                  !isSkipExpressionEnabled ||
                  (isSkipExpressionEnabled && !SkipExpressionUtil.shouldSkipFlowElement(execution, skipExpression))
              ) {
                  if (Context.getProcessEngineConfiguration().isEnableProcessDefinitionInfoCache()) {
                      ObjectNode taskElementProperties = Context.getBpmnOverrideElementProperties(
                          serviceTaskId,
                          execution.getProcessDefinitionId()
                      );
                      if (
                          taskElementProperties != null &&
                          taskElementProperties.has(DynamicBpmnConstants.SERVICE_TASK_EXPRESSION)
                      ) {
                          String overrideExpression = taskElementProperties
                              .get(DynamicBpmnConstants.SERVICE_TASK_EXPRESSION)
                              .asText();
                          if (
                              StringUtils.isNotEmpty(overrideExpression) &&
                              !overrideExpression.equals(expression.getExpressionText())
                          ) {
                              expression = Context.getProcessEngineConfiguration()
                                  .getExpressionManager()
                                  .createExpression(overrideExpression);
                          }
                      }
                  }
  
                  value = expression.getValue(execution);
                  if (resultVariable != null) {
                      execution.setVariable(resultVariable, value);
                  }
              }
  
              leave(execution);
          } catch (Exception exc) {
              Throwable cause = exc;
              BpmnError error = null;
              while (cause != null) {
                  if (cause instanceof BpmnError) {
                      error = (BpmnError) cause;
                      break;
                  }
                  cause = cause.getCause();
              }
  
              if (error != null) {
                  ErrorPropagation.propagateError(error, execution);
              } else {
                  throw new ActivitiException("Could not execute service task expression", exc);
              }
          }
      }
  }
  