Add ExpandableBinaryDictionary#getDictionaryStats().

Bug: 16553957
Change-Id: I05866624d0ba9f32ea7a71cb231ba501dde4376c

java/src/com/android/inputmethod/latin/DictionaryStats.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2014 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 java.io.File;
+import java.util.Locale;
+
+public class DictionaryStats {
+    public final Locale mLocale;
+    public final String mDictName;
+    public final String mDictFilePath;
+    public final long mDictFileSize;
+    // TODO: Add more members.
+
+    public DictionaryStats(final Locale locale, final String dictName, final File dictFile) {
+        mLocale = locale;
+        mDictName = dictName;
+        mDictFilePath = dictFile.getAbsolutePath();
+        mDictFileSize = dictFile.length();
+    }
+}

java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java

@@ -644,6 +644,17 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
         });
     }
 
+    public DictionaryStats getDictionaryStats() {
+        reloadDictionaryIfRequired();
+        mLock.readLock().lock();
+        try {
+            // TODO: Get stats form the dictionary.
+            return new DictionaryStats(mLocale, mDictName, mDictFile);
+        } finally {
+            mLock.readLock().unlock();
+        }
+    }
+
     @UsedForTesting
     public void waitAllTasksForTests() {
         final CountDownLatch countDownLatch = new CountDownLatch(1);