Add personalization dictionary helper

Bug: 9429906
Bug: 4192129

Change-Id: Ic618b0b09a54ed46b20633bd4c1c570d4ac775af

1 files changed, 53 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionaryHelper.java b/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionaryHelper.java
new file mode 100644
index 000000000..e09e834bf
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionaryHelper.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 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.personalization;
+
+import com.android.inputmethod.latin.utils.CollectionUtils;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.util.Log;
+
+import java.lang.ref.SoftReference;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class PersonalizationDictionaryHelper {
+    private static final String TAG = PersonalizationDictionaryHelper.class.getSimpleName();
+    private static final boolean DEBUG = false;
+
+    private static final ConcurrentHashMap<String, SoftReference<UserHistoryDictionary>>
+            sLangDictCache = CollectionUtils.newConcurrentHashMap();
+
+    public static UserHistoryDictionary getUserHistoryDictionary(
+            final Context context, final String locale, final SharedPreferences sp) {
+        synchronized (sLangDictCache) {
+            if (sLangDictCache.containsKey(locale)) {
+                final SoftReference<UserHistoryDictionary> ref = sLangDictCache.get(locale);
+                final UserHistoryDictionary dict = ref == null ? null : ref.get();
+                if (dict != null) {
+                    if (DEBUG) {
+                        Log.w(TAG, "Use cached UserHistoryDictionary for " + locale);
+                    }
+                    return dict;
+                }
+            }
+            final UserHistoryDictionary dict = new UserHistoryDictionary(context, locale, sp);
+            sLangDictCache.put(locale, new SoftReference<UserHistoryDictionary>(dict));
+            return dict;
+        }
+    }
+}