The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.os; |
| 18 | |
Dianne Hackborn | a53de06 | 2012-05-08 18:53:51 -0700 | [diff] [blame] | 19 | import java.util.ArrayList; |
| 20 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 21 | |
| 22 | /** |
| 23 | * Gives access to the system properties store. The system properties |
| 24 | * store contains a list of string key-value pairs. |
| 25 | * |
| 26 | * {@hide} |
| 27 | */ |
| 28 | public class SystemProperties |
| 29 | { |
| 30 | public static final int PROP_NAME_MAX = 31; |
| 31 | public static final int PROP_VALUE_MAX = 91; |
| 32 | |
Dianne Hackborn | a53de06 | 2012-05-08 18:53:51 -0700 | [diff] [blame] | 33 | private static final ArrayList<Runnable> sChangeCallbacks = new ArrayList<Runnable>(); |
| 34 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 35 | private static native String native_get(String key); |
| 36 | private static native String native_get(String key, String def); |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 37 | private static native int native_get_int(String key, int def); |
| 38 | private static native long native_get_long(String key, long def); |
| 39 | private static native boolean native_get_boolean(String key, boolean def); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 40 | private static native void native_set(String key, String def); |
Dianne Hackborn | a53de06 | 2012-05-08 18:53:51 -0700 | [diff] [blame] | 41 | private static native void native_add_change_callback(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 42 | |
| 43 | /** |
| 44 | * Get the value for the given key. |
| 45 | * @return an empty string if the key isn't found |
| 46 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 47 | */ |
| 48 | public static String get(String key) { |
| 49 | if (key.length() > PROP_NAME_MAX) { |
| 50 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
| 51 | } |
| 52 | return native_get(key); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Get the value for the given key. |
| 57 | * @return if the key isn't found, return def if it isn't null, or an empty string otherwise |
| 58 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 59 | */ |
| 60 | public static String get(String key, String def) { |
| 61 | if (key.length() > PROP_NAME_MAX) { |
| 62 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
| 63 | } |
| 64 | return native_get(key, def); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Get the value for the given key, and return as an integer. |
| 69 | * @param key the key to lookup |
| 70 | * @param def a default value to return |
| 71 | * @return the key parsed as an integer, or def if the key isn't found or |
| 72 | * cannot be parsed |
| 73 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 74 | */ |
| 75 | public static int getInt(String key, int def) { |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 76 | if (key.length() > PROP_NAME_MAX) { |
| 77 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 78 | } |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 79 | return native_get_int(key, def); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Get the value for the given key, and return as a long. |
| 84 | * @param key the key to lookup |
| 85 | * @param def a default value to return |
| 86 | * @return the key parsed as a long, or def if the key isn't found or |
| 87 | * cannot be parsed |
| 88 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 89 | */ |
| 90 | public static long getLong(String key, long def) { |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 91 | if (key.length() > PROP_NAME_MAX) { |
| 92 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 93 | } |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 94 | return native_get_long(key, def); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Get the value for the given key, returned as a boolean. |
| 99 | * Values 'n', 'no', '0', 'false' or 'off' are considered false. |
| 100 | * Values 'y', 'yes', '1', 'true' or 'on' are considered true. |
Brad Fitzpatrick | c1a968a | 2010-11-24 08:56:40 -0800 | [diff] [blame] | 101 | * (case sensitive). |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 102 | * If the key does not exist, or has any other value, then the default |
| 103 | * result is returned. |
| 104 | * @param key the key to lookup |
| 105 | * @param def a default value to return |
| 106 | * @return the key parsed as a boolean, or def if the key isn't found or is |
| 107 | * not able to be parsed as a boolean. |
| 108 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 109 | */ |
| 110 | public static boolean getBoolean(String key, boolean def) { |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 111 | if (key.length() > PROP_NAME_MAX) { |
| 112 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 113 | } |
Mike Lockwood | d194595 | 2009-08-12 17:15:51 -0400 | [diff] [blame] | 114 | return native_get_boolean(key, def); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Set the value for the given key. |
| 119 | * @throws IllegalArgumentException if the key exceeds 32 characters |
| 120 | * @throws IllegalArgumentException if the value exceeds 92 characters |
| 121 | */ |
| 122 | public static void set(String key, String val) { |
| 123 | if (key.length() > PROP_NAME_MAX) { |
| 124 | throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); |
| 125 | } |
| 126 | if (val != null && val.length() > PROP_VALUE_MAX) { |
| 127 | throw new IllegalArgumentException("val.length > " + |
| 128 | PROP_VALUE_MAX); |
| 129 | } |
| 130 | native_set(key, val); |
| 131 | } |
Dianne Hackborn | a53de06 | 2012-05-08 18:53:51 -0700 | [diff] [blame] | 132 | |
| 133 | public static void addChangeCallback(Runnable callback) { |
| 134 | synchronized (sChangeCallbacks) { |
| 135 | if (sChangeCallbacks.size() == 0) { |
| 136 | native_add_change_callback(); |
| 137 | } |
| 138 | sChangeCallbacks.add(callback); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static void callChangeCallbacks() { |
| 143 | synchronized (sChangeCallbacks) { |
| 144 | //Log.i("foo", "Calling " + sChangeCallbacks.size() + " change callbacks!"); |
| 145 | if (sChangeCallbacks.size() == 0) { |
| 146 | return; |
| 147 | } |
| 148 | ArrayList<Runnable> callbacks = new ArrayList<Runnable>(sChangeCallbacks); |
| 149 | for (int i=0; i<callbacks.size(); i++) { |
| 150 | callbacks.get(i).run(); |
| 151 | } |
| 152 | } |
| 153 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 154 | } |