Initial Contribution

1 files changed, 129 insertions, 0 deletions

diff --git a/services/java/com/android/server/AttributeCache.java b/services/java/com/android/server/AttributeCache.java
new file mode 100644
index 0000000..459ae52
--- /dev/null
+++ b/services/java/com/android/server/AttributeCache.java
@@ -0,0 +1,129 @@
+/*
+**
+** 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) {
+    }
+}
+