/*
* Copyright (C) 2006 The Android Open Source Project
* This code has been modified. Portions copyright (C) 2010, T-Mobile USA, Inc.
*
* 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.
*/
package android.os;
import java.util.ArrayList;
import android.util.Log;
/**
* 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;
public static final boolean QCOM_HARDWARE = native_get_boolean("com.qc.hardware", false);
private static final ArrayList<Runnable> sChangeCallbacks = new ArrayList<Runnable>();
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);
private static native void native_add_change_callback();
/**
* 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);
}
/**
* 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);
}
/**
* 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);
}
/**
* 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);
}
/**
* 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 sensitive).
* 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);
}
/**
* 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);
}
public static void addChangeCallback(Runnable callback) {
synchronized (sChangeCallbacks) {
if (sChangeCallbacks.size() == 0) {
native_add_change_callback();
}
sChangeCallbacks.add(callback);
}
}
static void callChangeCallbacks() {
synchronized (sChangeCallbacks) {
//Log.i("foo", "Calling " + sChangeCallbacks.size() + " change callbacks!");
if (sChangeCallbacks.size() == 0) {
return;
}
ArrayList<Runnable> callbacks = new ArrayList<Runnable>(sChangeCallbacks);
for (int i=0; i<callbacks.size(); i++) {
callbacks.get(i).run();
}
}
}
/**
* Get the value for the given key.
* @return def string if the key isn't found
*/
public static String getLongString(String key, String def) {
if (key.length() + 1 > PROP_NAME_MAX) {
throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX);
}
int chunks = getInt(key + '0', 0);
if (chunks == 0) {
return def;
}
StringBuffer sb = new StringBuffer();
for (int i = 1; i <= chunks; i++) {
sb.append(native_get(key + Integer.toString(i)));
}
return sb.toString();
}
/**
* Set the value for the given key.
* @throws IllegalArgumentException if the key exceeds 32 characters
*/
public static void setLongString(String key, String val) {
if (key.length() + 1 > PROP_NAME_MAX) {
throw new IllegalArgumentException("key.length > " + PROP_NAME_MAX);
}
int chunks = 0;
if (val != null && val.length() > 0) {
chunks = 1 + val.length() / (PROP_VALUE_MAX + 1);
}
native_set(key + '0', Integer.toString(chunks));
if (chunks > 0) {
for (int i = 1, start = 0; i <= chunks; i++) {
int end = start + PROP_VALUE_MAX;
if (end > val.length()) {
end = val.length();
}
native_set(key + Integer.toString(i), val.substring(start, end));
start = end;
}
}
}
}