content: /*
   * Copyright (C) 2010 The Android Open Source Project
   *
   * 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.
   */
  
  package android.content.res;
  
  import java.io.File;
  import java.io.IOException;
  
  /**
   * Class to scan Opaque Binary Blob (OBB) files. Use this to get information
   * about an OBB file for use in a program via {@link ObbInfo}.
   */
  public class ObbScanner {
      // Don't allow others to instantiate this class
      private ObbScanner() {}
  
      /**
       * Scan a file for OBB information.
       * 
       * @param filePath path to the OBB file to be scanned.
       * @return ObbInfo object information corresponding to the file path
       * @throws IllegalArgumentException if the OBB file couldn't be found
       * @throws IOException if the OBB file couldn't be read
       */
      public static ObbInfo getObbInfo(String filePath) throws IOException {
          if (filePath == null) {
              throw new IllegalArgumentException("file path cannot be null");
          }
  
          final File obbFile = new File(filePath);
          if (!obbFile.exists()) {
              throw new IllegalArgumentException("OBB file does not exist: " + filePath);
          }
  
          /*
           * XXX This will fail to find the real canonical path if bind mounts are
           * used, but we don't use any bind mounts right now.
           */
          final String canonicalFilePath = obbFile.getCanonicalPath();
  
          ObbInfo obbInfo = new ObbInfo();
          obbInfo.filename = canonicalFilePath;
          getObbInfo_native(canonicalFilePath, obbInfo);
  
          return obbInfo;
      }
  
      private native static void getObbInfo_native(String filePath, ObbInfo obbInfo)
              throws IOException;
  }
  