am 7058b02a: Extract a new class for app-specific workarounds.

* commit '7058b02a9c798c21b169b778be2befc7739f4e9b':
  Extract a new class for app-specific workarounds.

1 files changed, 70 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/TargetPackageInfoGetterTask.java b/java/src/com/android/inputmethod/latin/TargetPackageInfoGetterTask.java
new file mode 100644
index 000000000..947b0c586
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/TargetPackageInfoGetterTask.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2012 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.inputmethod.latin;
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.AsyncTask;
+import android.util.LruCache;
+
+public final class TargetPackageInfoGetterTask extends
+        AsyncTask<String, Void, PackageInfo> {
+    private static final int MAX_CACHE_ENTRIES = 64; // arbitrary
+    private static final LruCache<String, PackageInfo> sCache =
+            new LruCache<String, PackageInfo>(MAX_CACHE_ENTRIES);
+
+    public static PackageInfo getCachedPackageInfo(final String packageName) {
+        if (null == packageName) return null;
+        return sCache.get(packageName);
+    }
+
+    public static void removeCachedPackageInfo(final String packageName) {
+        sCache.remove(packageName);
+    }
+
+    public interface OnTargetPackageInfoKnownListener {
+        public void onTargetPackageInfoKnown(final PackageInfo info);
+    }
+
+    private Context mContext;
+    private final OnTargetPackageInfoKnownListener mListener;
+
+    public TargetPackageInfoGetterTask(final Context context,
+            final OnTargetPackageInfoKnownListener listener) {
+        mContext = context;
+        mListener = listener;
+    }
+
+    @Override
+    protected PackageInfo doInBackground(final String... packageName) {
+        final PackageManager pm = mContext.getPackageManager();
+        mContext = null; // Bazooka-powered anti-leak device
+        try {
+            final PackageInfo packageInfo = pm.getPackageInfo(packageName[0], 0 /* flags */);
+            sCache.put(packageName[0], packageInfo);
+            return packageInfo;
+        } catch (android.content.pm.PackageManager.NameNotFoundException e) {
+            return null;
+        }
+    }
+
+    @Override
+    protected void onPostExecute(final PackageInfo info) {
+        mListener.onTargetPackageInfoKnown(info);
+    }
+}