content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.beam.validate.runner.util;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Method;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  public class CategoryRetriever {
      public static List<String> getCategories(String className, String methodName) {
          List<String> categoryNames = new ArrayList<>();
          try {
              Class tempClass = Class.forName(className);
              for (Method method : tempClass.getDeclaredMethods()) {
                  if(method.getName().equals(methodName)) {
                      Annotation[] annotations = method.getAnnotations();
                      for(Annotation annotation : annotations) {
                          if (annotation instanceof org.junit.experimental.categories.Category) {
                              Class<?>[] categories = null;
                              categories = ((org.junit.experimental.categories.Category) annotation).value();
                              Arrays.stream(categories).forEach(category -> categoryNames.add(category.getName()));
                          } else {
                              continue;
                          }
                          return categoryNames;
                      }
                  } else {
                      continue;
                  }
              }
          } catch (ClassNotFoundException e) {
              return categoryNames;
          }
          return new ArrayList<>();
      }
  }
  