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/*
**
** Copyright 2007, 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.
*/
package com.android.server;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.Intent;
import android.content.BroadcastReceiver;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.provider.Settings;
import android.util.Config;
import android.util.Log;
import java.util.WeakHashMap;
public final class AttributeCache extends BroadcastReceiver {
private static AttributeCache sInstance = null;
private final Context mContext;
private final WeakHashMap<Key, Entry> mMap =
new WeakHashMap<Key, Entry>();
private final WeakHashMap<String, Context> mContexts =
new WeakHashMap<String, Context>();
final static class Key {
public final String packageName;
public final int resId;
public final int[] styleable;
public Key(String inPackageName, int inResId, int[] inStyleable) {
packageName = inPackageName;
resId = inResId;
styleable = inStyleable;
}
@Override public boolean equals(Object obj) {
try {
if (obj != null) {
Key other = (Key)obj;
return packageName.equals(other.packageName)
&& resId == other.resId
&& styleable == other.styleable;
}
} catch (ClassCastException e) {
}
return false;
}
@Override public int hashCode() {
return packageName.hashCode() + resId;
}
}
public final static class Entry {
public final Context context;
public final TypedArray array;
public Entry(Context c, TypedArray ta) {
context = c;
array = ta;
}
}
public static void init(Context context) {
if (sInstance == null) {
sInstance = new AttributeCache(context);
}
}
public static AttributeCache instance() {
return sInstance;
}
public AttributeCache(Context context) {
mContext = context;
}
public Entry get(String packageName, int resId, int[] styleable) {
synchronized (this) {
Key key = new Key(packageName, resId, styleable);
Entry ent = mMap.get(key);
if (ent != null) {
return ent;
}
Context context = mContexts.get(packageName);
if (context == null) {
try {
context = mContext.createPackageContext(packageName, 0);
if (context == null) {
return null;
}
mContexts.put(packageName, context);
} catch (PackageManager.NameNotFoundException e) {
return null;
}
}
try {
ent = new Entry(context,
context.obtainStyledAttributes(resId, styleable));
mMap.put(key, ent);
} catch (Resources.NotFoundException e) {
return null;
}
return ent;
}
}
@Override public void onReceive(Context context, Intent intent) {
}
}
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