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.delegate;
  
  import java.util.ArrayList;
  import java.util.List;
  import org.activiti.bpmn.model.Event;
  import org.activiti.bpmn.model.FieldExtension;
  import org.activiti.bpmn.model.MessageEventDefinition;
  import org.activiti.engine.delegate.Expression;
  import org.activiti.engine.impl.bpmn.parser.FieldDeclaration;
  import org.activiti.engine.impl.el.ExpressionManager;
  import org.activiti.engine.impl.el.FixedValue;
  import org.apache.commons.lang3.StringUtils;
  
  public class BpmnMessagePayloadMappingProviderFactory implements MessagePayloadMappingProviderFactory {
  
      @Override
      public MessagePayloadMappingProvider create(
          Event bpmnEvent,
          MessageEventDefinition messageEventDefinition,
          ExpressionManager expressionManager
      ) {
          List<FieldDeclaration> fieldDeclarations = createFieldDeclarations(
              messageEventDefinition.getFieldExtensions(),
              expressionManager
          );
  
          return new BpmnMessagePayloadMappingProvider(fieldDeclarations);
      }
  
      public List<FieldDeclaration> createFieldDeclarations(
          List<FieldExtension> fieldList,
          ExpressionManager expressionManager
      ) {
          List<FieldDeclaration> fieldDeclarations = new ArrayList<FieldDeclaration>();
  
          for (FieldExtension fieldExtension : fieldList) {
              FieldDeclaration fieldDeclaration = null;
              if (StringUtils.isNotEmpty(fieldExtension.getExpression())) {
                  fieldDeclaration = new FieldDeclaration(
                      fieldExtension.getFieldName(),
                      Expression.class.getName(),
                      expressionManager.createExpression(fieldExtension.getExpression())
                  );
              } else {
                  fieldDeclaration = new FieldDeclaration(
                      fieldExtension.getFieldName(),
                      Expression.class.getName(),
                      new FixedValue(fieldExtension.getStringValue())
                  );
              }
  
              fieldDeclarations.add(fieldDeclaration);
          }
          return fieldDeclarations;
      }
  }
  