content: /*
   * Copyright 2017-2025 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.cloud.services.notifications.graphql.events;
  
  import java.lang.annotation.Annotation;
  import org.springframework.core.annotation.AnnotationUtils;
  import org.springframework.expression.Expression;
  import org.springframework.expression.ExpressionParser;
  import org.springframework.expression.ParserContext;
  import org.springframework.expression.common.TemplateParserContext;
  import org.springframework.expression.spel.standard.SpelExpressionParser;
  
  public class SpELTemplateRoutingKeyResolver implements RoutingKeyResolver {
  
      private ExpressionParser parser = new SpelExpressionParser();
  
      private ParserContext parserContext = new TemplateParserContext();
  
      @Override
      public String resolveRoutingKey(Object object) {
          Annotation annotation = AnnotationUtils.findAnnotation(object.getClass(), SpELTemplateRoutingKey.class);
  
          if (annotation == null) throw new RuntimeException(
              "Cannot resolve routing key for class: " + object.getClass()
          );
  
          String value = AnnotationUtils.getValue(annotation).toString();
  
          Expression expression = parser.parseExpression(value, parserContext);
  
          return expression.getValue(object).toString();
      }
  }
  