code: /*
   * Copyright (c) 2008-2019 Emmanuel Dupuy.
   * This project is distributed under the GPLv3 license.
   * This is a Copyleft license that gives the user the right to use,
   * copy and modify the code freely for non-commercial purposes.
   */
  
  package org.jd.gui.service.fileloader;
  
  import org.jd.gui.api.API;
  import org.jd.gui.service.extension.ExtensionService;
  import org.jd.gui.spi.FileLoader;
  
  import java.io.File;
  import java.util.Collection;
  import java.util.HashMap;
  
  public class FileLoaderService {
      protected static final FileLoaderService FILE_LOADER_SERVICE = new FileLoaderService();
  
      public static FileLoaderService getInstance() { return FILE_LOADER_SERVICE; }
  
      protected final Collection<FileLoader> providers = ExtensionService.getInstance().load(FileLoader.class);
  
      protected HashMap<String, FileLoader> mapProviders = new HashMap<>();
  
      protected FileLoaderService() {
          for (FileLoader provider : providers) {
              for (String extension : provider.getExtensions()) {
                  mapProviders.put(extension, provider);
              }
          }
      }
  
      public FileLoader get(API api, File file) {
          String name = file.getName();
          int lastDot = name.lastIndexOf('.');
          String extension = name.substring(lastDot+1);
          FileLoader provider = mapProviders.get(extension);
          return provider;
      }
  
      public HashMap<String, FileLoader> getMapProviders() {
          return mapProviders;
      }
  }
  