org.activiti.engine.impl.delegate.BpmnMessagePayloadMappingProviderFactory Maven / Gradle / Ivy

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/* 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 fieldDeclarations = createFieldDeclarations(messageEventDefinition.getFieldExtensions(),
                                                                           expressionManager);
        
        return new BpmnMessagePayloadMappingProvider(fieldDeclarations);
    }
    
    public List createFieldDeclarations(List fieldList, 
                                                          ExpressionManager expressionManager) {
        List fieldDeclarations = new ArrayList();

        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;
      }    

}