content: package act.apidoc;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2018 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.util.LogSupport;
  import org.osgl.util.Generics;
  
  import javax.inject.Provider;
  import java.lang.reflect.Type;
  import java.util.List;
  
  public abstract class SampleDataProvider<T> extends LogSupport implements Provider<T> {
  
      private Class<T> targetType;
  
      public SampleDataProvider() {
          exploreType();
      }
  
      /**
       * Return the sample data
       * @return the sample data
       */
      public abstract T get();
  
      public Class<T> targetType() {
          return targetType;
      }
  
      public ISampleDataCategory category() {
          return null;
      }
  
      private void exploreType() {
          List<Type> types = Generics.typeParamImplementations(getClass(), SampleDataProvider.class);
          if (types.size() != 1) {
              warnTargetTypeNotDetermined();
          } else {
              Type type = types.get(0);
              if (! (type instanceof Class)) {
                  warnTargetTypeNotDetermined();
              } else {
                  targetType = (Class<T>) type;
              }
          }
      }
  
      private void warnTargetTypeNotDetermined() {
          warn("Cannot determine target type of SampleDataProvider: " + getClass());
      }
  }
  