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.listener;
  
  import java.util.Map;
  import org.activiti.engine.ActivitiIllegalArgumentException;
  import org.activiti.engine.delegate.CustomPropertiesResolver;
  import org.activiti.engine.delegate.DelegateExecution;
  import org.activiti.engine.delegate.Expression;
  
  /**
   * An {@link CustomPropertiesResolver} that evaluates a {@link Expression} when notified.
   *
  
   */
  public class ExpressionCustomPropertiesResolver implements CustomPropertiesResolver {
  
      protected Expression expression;
  
      public ExpressionCustomPropertiesResolver(Expression expression) {
          this.expression = expression;
      }
  
      @Override
      public Map<String, Object> getCustomPropertiesMap(DelegateExecution execution) {
          Object expressionValue = expression.getValue(execution);
          if (expressionValue instanceof Map) {
              return (Map<String, Object>) expressionValue;
          } else {
              throw new ActivitiIllegalArgumentException(
                  "Custom properties resolver expression " + expression + " did not return a Map<String, Object>"
              );
          }
      }
  
      /**
       * returns the expression text for this execution listener. Comes in handy if you want to check which listeners you already have.
       */
      public String getExpressionText() {
          return expression.getExpressionText();
      }
  }
  