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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.base; | 5 package org.chromium.base; |
6 | 6 |
7 import android.content.ContentResolver; | 7 import android.content.ContentResolver; |
8 import android.content.Context; | 8 import android.content.Context; |
9 import android.database.Cursor; | 9 import android.database.Cursor; |
10 import android.net.Uri; | 10 import android.net.Uri; |
11 import android.os.ParcelFileDescriptor; | 11 import android.os.ParcelFileDescriptor; |
12 import android.util.Log; | 12 import android.util.Log; |
13 | 13 |
14 import java.io.File; | 14 import java.io.File; |
15 | 15 |
16 /** | 16 /** |
17 * This class provides methods to access content URI schemes. | 17 * This class provides methods to access content URI schemes. |
18 */ | 18 */ |
19 public abstract class ContentUriUtils { | 19 public abstract class ContentUriUtils { |
20 private static final String TAG = "ContentUriUtils"; | 20 private static final String TAG = "ContentUriUtils"; |
21 private static FileProviderUtil sFileProviderUtil; | 21 private static FileProviderUtil sFileProviderUtil; |
22 | 22 |
23 /** | 23 /** |
24 * Provides functionality to translate a file into a content URI for use | 24 * Provides functionality to translate a file into a content URI for use |
25 * with a content provider. | 25 * with a content provider. |
26 */ | 26 */ |
27 public interface FileProviderUtil { | 27 public interface FileProviderUtil { |
28 /** | 28 /** |
29 * Generate a content uri from the given file. | 29 * Generate a content URI from the given file. |
30 * @param context Application context. | 30 * @param context Application context. |
31 * @param file The file to be translated. | 31 * @param file The file to be translated. |
32 */ | 32 */ |
33 public Uri getContentUriFromFile(Context context, File file); | 33 public Uri getContentUriFromFile(Context context, File file); |
nyquist
2014/11/20 20:01:11
This is implicitly public.
qinmin
2014/11/20 23:07:19
ok, removed the public keyword.
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34 } | 34 } |
35 | 35 |
36 // Prevent instantiation. | 36 // Prevent instantiation. |
37 private ContentUriUtils() {} | 37 private ContentUriUtils() {} |
38 | 38 |
39 public static void setFileProviderUtil(FileProviderUtil util) { | 39 public static void setFileProviderUtil(FileProviderUtil util) { |
40 sFileProviderUtil = util; | 40 sFileProviderUtil = util; |
41 } | 41 } |
42 | 42 |
43 public static Uri getContentUriFromFile(Context context, File file) { | 43 public static Uri getContentUriFromFile(Context context, File file) { |
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63 return pfd.detachFd(); | 63 return pfd.detachFd(); |
64 } | 64 } |
65 return -1; | 65 return -1; |
66 } | 66 } |
67 | 67 |
68 /** | 68 /** |
69 * Check whether a content URI exists. | 69 * Check whether a content URI exists. |
70 * | 70 * |
71 * @param context {@link Context} in interest. | 71 * @param context {@link Context} in interest. |
72 * @param uriString the content URI to query. | 72 * @param uriString the content URI to query. |
73 * @returns true if the uri exists, or false otherwise. | 73 * @returns true if the URI exists, or false otherwise. |
74 */ | 74 */ |
75 @CalledByNative | 75 @CalledByNative |
76 public static boolean contentUriExists(Context context, String uriString) { | 76 public static boolean contentUriExists(Context context, String uriString) { |
77 ParcelFileDescriptor pfd = getParcelFileDescriptor(context, uriString); | 77 ParcelFileDescriptor pfd = getParcelFileDescriptor(context, uriString); |
78 if (pfd == null) { | 78 if (pfd == null) { |
nyquist
2014/11/20 20:01:11
Optional: This bugs me; feel free to change this t
qinmin
2014/11/20 23:07:19
Done.
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79 return false; | 79 return false; |
80 } | 80 } |
81 return true; | 81 return true; |
82 } | 82 } |
83 | 83 |
84 /** | 84 /** |
85 * Retrieve the MIME type for the content URI. | |
86 * | |
87 * @param context {@link Context} in interest. | |
88 * @param uriString the content URI to look up. | |
89 * @returns MIME type or null if the input params are empty or invalid. | |
nyquist
2014/11/20 20:01:11
This should be @return (throughout this file)
qinmin
2014/11/20 23:07:18
Done.
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90 */ | |
91 @CalledByNative | |
92 public static String getMimeType(Context context, String uriString) { | |
93 ContentResolver resolver = context.getContentResolver(); | |
94 Uri uri = Uri.parse(uriString); | |
95 if (resolver == null || uri == null) return null; | |
nyquist
2014/11/20 20:01:11
Uri.parse(...) never returns null (specifically me
qinmin
2014/11/20 23:07:19
Done.
| |
96 return resolver.getType(uri); | |
97 } | |
98 | |
99 /** | |
85 * Helper method to open a content URI and return the ParcelFileDescriptor. | 100 * Helper method to open a content URI and return the ParcelFileDescriptor. |
86 * | 101 * |
87 * @param context {@link Context} in interest. | 102 * @param context {@link Context} in interest. |
88 * @param uriString the content URI to open. | 103 * @param uriString the content URI to open. |
89 * @returns ParcelFileDescriptor of the content URI, or NULL if the file doe s not exist. | 104 * @returns ParcelFileDescriptor of the content URI, or NULL if the file doe s not exist. |
90 */ | 105 */ |
91 private static ParcelFileDescriptor getParcelFileDescriptor(Context context, String uriString) { | 106 private static ParcelFileDescriptor getParcelFileDescriptor(Context context, String uriString) { |
92 ContentResolver resolver = context.getContentResolver(); | 107 ContentResolver resolver = context.getContentResolver(); |
93 Uri uri = Uri.parse(uriString); | 108 Uri uri = Uri.parse(uriString); |
94 | 109 |
95 ParcelFileDescriptor pfd = null; | 110 ParcelFileDescriptor pfd = null; |
96 try { | 111 try { |
97 pfd = resolver.openFileDescriptor(uri, "r"); | 112 pfd = resolver.openFileDescriptor(uri, "r"); |
98 } catch (java.io.FileNotFoundException e) { | 113 } catch (java.io.FileNotFoundException e) { |
nyquist
2014/11/20 20:01:11
could you change this one to import FileNotFoundEx
qinmin
2014/11/20 23:07:18
Done.
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99 Log.w(TAG, "Cannot find content uri: " + uriString, e); | 114 Log.w(TAG, "Cannot find content uri: " + uriString, e); |
115 } catch (SecurityException e) { | |
116 Log.w(TAG, "Cannot open content uri: " + uriString, e); | |
100 } | 117 } |
101 return pfd; | 118 return pfd; |
102 } | 119 } |
103 | 120 |
104 /** | 121 /** |
105 * Method to resolve the display name of a content URI. | 122 * Method to resolve the display name of a content URI. |
106 * | 123 * |
107 * @param uri the content URI to be resolved. | 124 * @param uri the content URI to be resolved. |
108 * @param contentResolver the content resolver to query. | 125 * @param contentResolver the content resolver to query. |
109 * @param columnField the column field to query. | 126 * @param columnField the column field to query. |
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125 } catch (NullPointerException e) { | 142 } catch (NullPointerException e) { |
126 // Some android models don't handle the provider call correctly. | 143 // Some android models don't handle the provider call correctly. |
127 // see crbug.com/345393 | 144 // see crbug.com/345393 |
128 return ""; | 145 return ""; |
129 } finally { | 146 } finally { |
130 if (cursor != null) cursor.close(); | 147 if (cursor != null) cursor.close(); |
131 } | 148 } |
132 return ""; | 149 return ""; |
133 } | 150 } |
134 } | 151 } |
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