content: package act.app;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 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.Act;
  import act.util.DescendantClassFilter;
  import org.osgl.$;
  
  import java.io.File;
  
  /**
   * Base class defines the application project layout probe contract
   * and utilities
   */
  public abstract class ProjectLayoutProbe {
  
      /**
       * Check if the given folder contains an application with certain layout
       *
       * @param appBase the folder supposed to be an application's base
       * @return a {@link ProjectLayout} of the app base or
       * {@code null} if can't figure out the project layout
       */
      public abstract ProjectLayout probe(File appBase);
  
      public static final DescendantClassFilter<ProjectLayoutProbe> PLUGIN_FILTER = new DescendantClassFilter<ProjectLayoutProbe>(true, true, ProjectLayoutProbe.class) {
          @Override
          public void found(Class<? extends ProjectLayoutProbe> clazz) {
              Act.mode().appScanner().register($.newInstance(clazz));
          }
      };
  
  }
  