130 lines
4.0 KiB
Java
130 lines
4.0 KiB
Java
/*
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**
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** Copyright 2007, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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package com.android.server;
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import android.content.ComponentName;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.Intent;
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import android.content.BroadcastReceiver;
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import android.content.pm.PackageManager;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.provider.Settings;
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import android.util.Config;
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import android.util.Log;
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import java.util.WeakHashMap;
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public final class AttributeCache extends BroadcastReceiver {
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private static AttributeCache sInstance = null;
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private final Context mContext;
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private final WeakHashMap<Key, Entry> mMap =
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new WeakHashMap<Key, Entry>();
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private final WeakHashMap<String, Context> mContexts =
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new WeakHashMap<String, Context>();
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final static class Key {
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public final String packageName;
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public final int resId;
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public final int[] styleable;
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public Key(String inPackageName, int inResId, int[] inStyleable) {
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packageName = inPackageName;
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resId = inResId;
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styleable = inStyleable;
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}
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@Override public boolean equals(Object obj) {
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try {
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if (obj != null) {
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Key other = (Key)obj;
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return packageName.equals(other.packageName)
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&& resId == other.resId
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&& styleable == other.styleable;
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}
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} catch (ClassCastException e) {
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}
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return false;
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}
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@Override public int hashCode() {
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return packageName.hashCode() + resId;
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}
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}
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public final static class Entry {
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public final Context context;
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public final TypedArray array;
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public Entry(Context c, TypedArray ta) {
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context = c;
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array = ta;
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}
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}
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public static void init(Context context) {
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if (sInstance == null) {
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sInstance = new AttributeCache(context);
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}
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}
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public static AttributeCache instance() {
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return sInstance;
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}
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public AttributeCache(Context context) {
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mContext = context;
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}
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public Entry get(String packageName, int resId, int[] styleable) {
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synchronized (this) {
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Key key = new Key(packageName, resId, styleable);
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Entry ent = mMap.get(key);
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if (ent != null) {
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return ent;
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}
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Context context = mContexts.get(packageName);
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if (context == null) {
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try {
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context = mContext.createPackageContext(packageName, 0);
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if (context == null) {
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return null;
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}
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mContexts.put(packageName, context);
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} catch (PackageManager.NameNotFoundException e) {
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return null;
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}
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}
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try {
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ent = new Entry(context,
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context.obtainStyledAttributes(resId, styleable));
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mMap.put(key, ent);
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} catch (Resources.NotFoundException e) {
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return null;
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}
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return ent;
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}
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}
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@Override public void onReceive(Context context, Intent intent) {
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}
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}
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