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      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 package org.chromium.base;
      6 
      7 import android.content.Context;
      8 import android.content.pm.ApplicationInfo;
      9 import android.os.Environment;
     10 
     11 /**
     12  * This class provides the path related methods for the native library.
     13  */
     14 public abstract class PathUtils {
     15 
     16     private static String sDataDirectorySuffix;
     17 
     18     // Prevent instantiation.
     19     private PathUtils() {}
     20 
     21     /**
     22      * Sets the suffix that should be used for the directory where private data is to be stored
     23      * by the application.
     24      * @param suffix The private data directory suffix.
     25      * @see Context#getDir(String, int)
     26      */
     27     public static void setPrivateDataDirectorySuffix(String suffix) {
     28         sDataDirectorySuffix = suffix;
     29     }
     30 
     31     /**
     32      * @return the private directory that is used to store application data.
     33      */
     34     @CalledByNative
     35     public static String getDataDirectory(Context appContext) {
     36         if (sDataDirectorySuffix == null) {
     37             throw new IllegalStateException(
     38                     "setDataDirectorySuffix must be called before getDataDirectory");
     39         }
     40         return appContext.getDir(sDataDirectorySuffix, Context.MODE_PRIVATE).getPath();
     41     }
     42 
     43     /**
     44      * @return the private directory that is used to store application database.
     45      */
     46     @CalledByNative
     47     public static String getDatabaseDirectory(Context appContext) {
     48         // Context.getDatabasePath() returns path for the provided filename.
     49         return appContext.getDatabasePath("foo").getParent();
     50     }
     51 
     52     /**
     53      * @return the cache directory.
     54      */
     55     @SuppressWarnings("unused")
     56     @CalledByNative
     57     public static String getCacheDirectory(Context appContext) {
     58         return appContext.getCacheDir().getPath();
     59     }
     60 
     61     /**
     62      * @return the public downloads directory.
     63      */
     64     @SuppressWarnings("unused")
     65     @CalledByNative
     66     private static String getDownloadsDirectory(Context appContext) {
     67         return Environment.getExternalStoragePublicDirectory(
     68                 Environment.DIRECTORY_DOWNLOADS).getPath();
     69     }
     70 
     71     /**
     72      * @return the path to native libraries.
     73      */
     74     @SuppressWarnings("unused")
     75     @CalledByNative
     76     private static String getNativeLibraryDirectory(Context appContext) {
     77         ApplicationInfo ai = appContext.getApplicationInfo();
     78         if ((ai.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0 ||
     79             (ai.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
     80             return ai.nativeLibraryDir;
     81         }
     82 
     83         return "/system/lib/";
     84     }
     85 
     86     /**
     87      * @return the external storage directory.
     88      */
     89     @SuppressWarnings("unused")
     90     @CalledByNative
     91     public static String getExternalStorageDirectory() {
     92         return Environment.getExternalStorageDirectory().getAbsolutePath();
     93     }
     94 }
     95