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 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gives access to the system properties store. The system properties 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * store contains a list of string key-value pairs. 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@hide} 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class SystemProperties 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int PROP_NAME_MAX = 31; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static final int PROP_VALUE_MAX = 91; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native String native_get(String key); 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native String native_get(String key, String def); 33d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native int native_get_int(String key, int def); 34d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native long native_get_long(String key, long def); 35d1945950451220932f70bac83408c761dcba231fMike Lockwood private static native boolean native_get_boolean(String key, boolean def); 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static native void native_set(String key, String def); 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key. 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return an empty string if the key isn't found 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static String get(String key) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return native_get(key); 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return if the key isn't found, return def if it isn't null, or an empty string otherwise 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static String get(String key, String def) { 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return native_get(key, def); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, and return as an integer. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as an integer, or def if the key isn't found or 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * cannot be parsed 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static int getInt(String key, int def) { 71d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 72d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 74d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_int(key, def); 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, and return as a long. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as a long, or def if the key isn't found or 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * cannot be parsed 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static long getLong(String key, long def) { 86d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 87d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 89d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_long(key, def); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Get the value for the given key, returned as a boolean. 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Values 'n', 'no', '0', 'false' or 'off' are considered false. 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Values 'y', 'yes', '1', 'true' or 'on' are considered true. 96c1a968a8ed45181312f7d4bcdbba0cc8ddc201baBrad Fitzpatrick * (case sensitive). 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If the key does not exist, or has any other value, then the default 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * result is returned. 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param key the key to lookup 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param def a default value to return 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return the key parsed as a boolean, or def if the key isn't found or is 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * not able to be parsed as a boolean. 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static boolean getBoolean(String key, boolean def) { 106d1945950451220932f70bac83408c761dcba231fMike Lockwood if (key.length() > PROP_NAME_MAX) { 107d1945950451220932f70bac83408c761dcba231fMike Lockwood throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 109d1945950451220932f70bac83408c761dcba231fMike Lockwood return native_get_boolean(key, def); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Set the value for the given key. 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the key exceeds 32 characters 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IllegalArgumentException if the value exceeds 92 characters 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static void set(String key, String val) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (key.length() > PROP_NAME_MAX) { 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (val != null && val.length() > PROP_VALUE_MAX) { 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new IllegalArgumentException("val.length > " + 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PROP_VALUE_MAX); 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project native_set(key, val); 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 128