19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.os; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 19a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackbornimport java.util.ArrayList; 20a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gives access to the system properties store. The system properties 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * store contains a list of string key-value pairs. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class SystemProperties 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int PROP_NAME_MAX = 31; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int PROP_VALUE_MAX = 91; 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 33a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn private static final ArrayList<Runnable> sChangeCallbacks = new ArrayList<Runnable>(); 34a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native String native_get(String key); 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native String native_get(String key, String def); 37d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native int native_get_int(String key, int def); 38d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native long native_get_long(String key, long def); 39d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native boolean native_get_boolean(String key, boolean def); 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void native_set(String key, String def); 41a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn private static native void native_add_change_callback(); 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key. 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return an empty string if the key isn't found 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static String get(String key) { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return native_get(key); 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key. 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return if the key isn't found, return def if it isn't null, or an empty string otherwise 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static String get(String key, String def) { 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return native_get(key, def); 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, and return as an integer. 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as an integer, or def if the key isn't found or 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * cannot be parsed 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static int getInt(String key, int def) { 76d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 77d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 79d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_int(key, def); 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, and return as a long. 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as a long, or def if the key isn't found or 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * cannot be parsed 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static long getLong(String key, long def) { 91d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 92d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 94d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_long(key, def); 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, returned as a boolean. 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Values 'n', 'no', '0', 'false' or 'off' are considered false. 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Values 'y', 'yes', '1', 'true' or 'on' are considered true. 101c1a968a8ed45181312f7d4bcdbba0cc8ddc201baBrad Fitzpatrick * (case sensitive). 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If the key does not exist, or has any other value, then the default 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * result is returned. 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as a boolean, or def if the key isn't found or is 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not able to be parsed as a boolean. 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static boolean getBoolean(String key, boolean def) { 111d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 112d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 114d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_boolean(key, def); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set the value for the given key. 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the value exceeds 92 characters 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static void set(String key, String val) { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (val != null && val.length() > PROP_VALUE_MAX) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("val.length > " + 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PROP_VALUE_MAX); 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project native_set(key, val); 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 132a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn 133a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn public static void addChangeCallback(Runnable callback) { 134a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn synchronized (sChangeCallbacks) { 135a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn if (sChangeCallbacks.size() == 0) { 136a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn native_add_change_callback(); 137a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 138a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn sChangeCallbacks.add(callback); 139a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 140a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 141a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn 142a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn static void callChangeCallbacks() { 143a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn synchronized (sChangeCallbacks) { 144a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn //Log.i("foo", "Calling " + sChangeCallbacks.size() + " change callbacks!"); 145a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn if (sChangeCallbacks.size() == 0) { 146a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn return; 147a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 148a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn ArrayList<Runnable> callbacks = new ArrayList<Runnable>(sChangeCallbacks); 149a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn for (int i=0; i<callbacks.size(); i++) { 150a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn callbacks.get(i).run(); 151a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 152a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 153a53de0629f3b94472c0f160f5bbe1090b020feabDianne Hackborn } 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 155