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| /* | ||
| * Copyright (C) 2006 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package android.os; | ||
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| /** | ||
| * Gives access to the system properties store. The system properties | ||
| * store contains a list of string key-value pairs. | ||
| * | ||
| * {@hide} | ||
| */ | ||
| public class SystemProperties | ||
| { | ||
| public static final int PROP_NAME_MAX = 31; | ||
| public static final int PROP_VALUE_MAX = 91; | ||
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| private static native String native_get(String key); | ||
| private static native String native_get(String key, String def); | ||
| private static native int native_get_int(String key, int def); | ||
| private static native long native_get_long(String key, long def); | ||
| private static native boolean native_get_boolean(String key, boolean def); | ||
| private static native void native_set(String key, String def); | ||
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|
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| /** | ||
| * Get the value for the given key. | ||
| * @return an empty string if the key isn't found | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| */ | ||
| public static String get(String key) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| return native_get(key); | ||
| } | ||
|
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| /** | ||
| * Get the value for the given key. | ||
| * @return if the key isn't found, return def if it isn't null, or an empty string otherwise | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| */ | ||
| public static String get(String key, String def) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| return native_get(key, def); | ||
| } | ||
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| /** | ||
| * Get the value for the given key, and return as an integer. | ||
| * @param key the key to lookup | ||
| * @param def a default value to return | ||
| * @return the key parsed as an integer, or def if the key isn't found or | ||
| * cannot be parsed | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| */ | ||
| public static int getInt(String key, int def) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| return native_get_int(key, def); | ||
| } | ||
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| /** | ||
| * Get the value for the given key, and return as a long. | ||
| * @param key the key to lookup | ||
| * @param def a default value to return | ||
| * @return the key parsed as a long, or def if the key isn't found or | ||
| * cannot be parsed | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| */ | ||
| public static long getLong(String key, long def) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| return native_get_long(key, def); | ||
| } | ||
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| /** | ||
| * Get the value for the given key, returned as a boolean. | ||
| * Values 'n', 'no', '0', 'false' or 'off' are considered false. | ||
| * Values 'y', 'yes', '1', 'true' or 'on' are considered true. | ||
| * (case insensitive). | ||
| * If the key does not exist, or has any other value, then the default | ||
| * result is returned. | ||
| * @param key the key to lookup | ||
| * @param def a default value to return | ||
| * @return the key parsed as a boolean, or def if the key isn't found or is | ||
| * not able to be parsed as a boolean. | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| */ | ||
| public static boolean getBoolean(String key, boolean def) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| return native_get_boolean(key, def); | ||
| } | ||
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| /** | ||
| * Set the value for the given key. | ||
| * @throws IllegalArgumentException if the key exceeds 32 characters | ||
| * @throws IllegalArgumentException if the value exceeds 92 characters | ||
| */ | ||
| public static void set(String key, String val) { | ||
| if (key.length() > PROP_NAME_MAX) { | ||
| throw new IllegalArgumentException("key.length > " PROP_NAME_MAX); | ||
| } | ||
| if (val != null && val.length() > PROP_VALUE_MAX) { | ||
| throw new IllegalArgumentException("val.length > " | ||
| PROP_VALUE_MAX); | ||
| } | ||
| native_set(key, val); | ||
| } | ||
| } |