content: /*
   * Copyright 2013 Hannes Janetzek
   *
   * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
   *
   * This program is free software: you can redistribute it and/or modify it under the
   * terms of the GNU Lesser General Public License as published by the Free Software
   * Foundation, either version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.backend;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  
  /**
   * The Class AssetAdapter.
   */
  public abstract class AssetAdapter {
  
      /**
       * The instance provided by backend
       */
      static AssetAdapter g;
  
      /**
       * Open file from asset path as stream.
       */
      protected abstract InputStream openFileAsStream(String file);
  
      public static InputStream readFileAsStream(String file) {
          return g.openFileAsStream(file);
      }
  
      public static String readTextFile(String file) {
          StringBuilder sb = new StringBuilder();
  
          InputStream is = g.openFileAsStream(file);
          if (is == null)
              return null;
  
          BufferedReader r = new BufferedReader(new InputStreamReader(is));
          String line;
          try {
              while ((line = r.readLine()) != null) {
                  sb.append(line).append('\n');
              }
          } catch (IOException e) {
              e.printStackTrace();
          }
  
          return sb.toString();
  
      }
  
      public static void init(AssetAdapter adapter) {
          g = adapter;
      }
  }
  