Quit recording LastUserHistoryWriteTime.

Change-Id: I0f2b408b4976d8119c932654e23836803d42c568

9 files changed, 31 insertions, 158 deletions

diff --git a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
index 7107076cc..056054273 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
@@ -53,6 +53,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
 
     /** Whether to print debug output to log */
     private static boolean DEBUG = false;
+    private static final boolean DBG_STRESS_TEST = false;
 
     private static final int TIMEOUT_FOR_READ_OPS_IN_MILLISECONDS = 100;
 
@@ -496,6 +497,16 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                     + mFilenameDictionaryUpdateController.mLastUpdateRequestTime + " update="
                     + mFilenameDictionaryUpdateController.mLastUpdateTime);
         }
+        if (DBG_STRESS_TEST) {
+            // Test if this class does not cause problems when it takes long time to load binary
+            // dictionary.
+            try {
+                Log.w(TAG, "Start stress in loading: " + mFilename);
+                Thread.sleep(15000);
+                Log.w(TAG, "End stress in loading");
+            } catch (InterruptedException e) {
+            }
+        }
 
         final File file = new File(mContext.getFilesDir(), mFilename
                 + getFileNameExtentionToOpenDict());
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 87eed3bc9..16d860f22 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -649,14 +649,13 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
 
-        mUserHistoryDictionary = PersonalizationHelper.getUserHistoryDictionary(
-                this, localeStr, prefs);
+        mUserHistoryDictionary = PersonalizationHelper.getUserHistoryDictionary(this, localeStr);
         newSuggest.setUserHistoryDictionary(mUserHistoryDictionary);
-        mPersonalizationDictionary = PersonalizationHelper
-                .getPersonalizationDictionary(this, localeStr, prefs);
+        mPersonalizationDictionary =
+                PersonalizationHelper.getPersonalizationDictionary(this, localeStr);
         newSuggest.setPersonalizationDictionary(mPersonalizationDictionary);
-        mPersonalizationPredictionDictionary = PersonalizationHelper
-                .getPersonalizationPredictionDictionary(this, localeStr, prefs);
+        mPersonalizationPredictionDictionary =
+                PersonalizationHelper.getPersonalizationPredictionDictionary(this, localeStr);
         newSuggest.setPersonalizationPredictionDictionary(mPersonalizationPredictionDictionary);
 
         final Suggest oldSuggest = mSuggest;
diff --git a/java/src/com/android/inputmethod/latin/personalization/DecayingExpandableBinaryDictionaryBase.java b/java/src/com/android/inputmethod/latin/personalization/DecayingExpandableBinaryDictionaryBase.java
index 5edac232c..dbf6d0046 100644
--- a/java/src/com/android/inputmethod/latin/personalization/DecayingExpandableBinaryDictionaryBase.java
+++ b/java/src/com/android/inputmethod/latin/personalization/DecayingExpandableBinaryDictionaryBase.java
@@ -17,7 +17,6 @@
 package com.android.inputmethod.latin.personalization;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 import android.util.Log;
 
 import com.android.inputmethod.annotations.UsedForTesting;
@@ -25,11 +24,9 @@ import com.android.inputmethod.latin.BinaryDictionary.LanguageModelParam;
 import com.android.inputmethod.latin.Constants;
 import com.android.inputmethod.latin.Dictionary;
 import com.android.inputmethod.latin.ExpandableBinaryDictionary;
-import com.android.inputmethod.latin.LatinImeLogger;
 import com.android.inputmethod.latin.makedict.DictDecoder;
 import com.android.inputmethod.latin.makedict.FormatSpec;
 import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
-import com.android.inputmethod.latin.settings.Settings;
 import com.android.inputmethod.latin.utils.CollectionUtils;
 import com.android.inputmethod.latin.utils.UserHistoryDictIOUtils;
 import com.android.inputmethod.latin.utils.UserHistoryDictIOUtils.OnAddWordListener;
@@ -47,9 +44,7 @@ import java.util.Map;
 public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableBinaryDictionary {
     private static final String TAG = DecayingExpandableBinaryDictionaryBase.class.getSimpleName();
     public static final boolean DBG_SAVE_RESTORE = false;
-    private static final boolean DBG_STRESS_TEST = false;
     private static final boolean DBG_DUMP_ON_CLOSE = false;
-    private static final boolean PROFILE_SAVE_RESTORE = LatinImeLogger.sDBG;
 
     /** Any pair being typed or picked */
     public static final int FREQUENCY_FOR_TYPED = 2;
@@ -64,8 +59,6 @@ public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableB
 
     private final String mFileName;
 
-    private final SharedPreferences mPrefs;
-
     private final ArrayList<PersonalizationDictionaryUpdateSession> mSessions =
             CollectionUtils.newArrayList();
 
@@ -73,12 +66,10 @@ public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableB
     @UsedForTesting boolean mIsTest = false;
 
     /* package */ DecayingExpandableBinaryDictionaryBase(final Context context,
-            final String locale, final SharedPreferences sp, final String dictionaryType,
-            final String fileName) {
+            final String locale, final String dictionaryType, final String fileName) {
         super(context, fileName, dictionaryType, true);
         mLocale = locale;
         mFileName = fileName;
-        mPrefs = sp;
         if (mLocale != null && mLocale.length() > 1) {
             reloadDictionaryIfRequired();
         }
@@ -92,7 +83,6 @@ public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableB
         // Flush pending writes.
         // TODO: Remove after this class become to use a dynamic binary dictionary.
         asyncFlashAllBinaryDictionary();
-        Settings.writeLastUserHistoryWriteTime(mPrefs, mLocale);
     }
 
     @Override
@@ -171,67 +161,7 @@ public abstract class DecayingExpandableBinaryDictionaryBase extends ExpandableB
 
     @Override
     protected void loadDictionaryAsync() {
-        final int[] profTotalCount = { 0 };
-        final String locale = getLocale();
-        if (DBG_STRESS_TEST) {
-            try {
-                Log.w(TAG, "Start stress in loading: " + locale);
-                Thread.sleep(15000);
-                Log.w(TAG, "End stress in loading");
-            } catch (InterruptedException e) {
-            }
-        }
-        final long last = Settings.readLastUserHistoryWriteTime(mPrefs, locale);
-        final long now = System.currentTimeMillis();
-        final ExpandableBinaryDictionary dictionary = this;
-        final OnAddWordListener listener = new OnAddWordListener() {
-            @Override
-            public void setUnigram(final String word, final String shortcutTarget,
-                    final int frequency, final int shortcutFreq) {
-                if (DBG_SAVE_RESTORE) {
-                    Log.d(TAG, "load unigram: " + word + "," + frequency);
-                }
-                addWord(word, shortcutTarget, frequency, shortcutFreq, false /* isNotAWord */);
-                ++profTotalCount[0];
-            }
-
-            @Override
-            public void setBigram(final String word0, final String word1, final int frequency) {
-                if (word0.length() < Constants.DICTIONARY_MAX_WORD_LENGTH
-                        && word1.length() < Constants.DICTIONARY_MAX_WORD_LENGTH) {
-                    if (DBG_SAVE_RESTORE) {
-                        Log.d(TAG, "load bigram: " + word0 + "," + word1 + "," + frequency);
-                    }
-                    ++profTotalCount[0];
-                    addBigram(word0, word1, frequency, last);
-                }
-            }
-        };
-
-        // Load the dictionary from binary file
-        final File dictFile = new File(mContext.getFilesDir(), mFileName);
-        final DictDecoder dictDecoder = FormatSpec.getDictDecoder(dictFile,
-                DictDecoder.USE_BYTEARRAY);
-        if (dictDecoder == null) {
-            // This is an expected condition: we don't have a user history dictionary for this
-            // language yet. It will be created sometime later.
-            return;
-        }
-
-        try {
-            dictDecoder.openDictBuffer();
-            UserHistoryDictIOUtils.readDictionaryBinary(dictDecoder, listener);
-        } catch (IOException e) {
-            Log.d(TAG, "IOException on opening a bytebuffer", e);
-        } catch (UnsupportedFormatException e) {
-            Log.d(TAG, "Unsupported format, can't read the dictionary", e);
-        } finally {
-            if (PROFILE_SAVE_RESTORE) {
-                final long diff = System.currentTimeMillis() - now;
-                Log.d(TAG, "PROF: Load UserHistoryDictionary: "
-                        + locale + ", " + diff + "ms. load " + profTotalCount[0] + "entries.");
-            }
-        }
+        // Never loaded to memory in Java side.
     }
 
     protected String getLocale() {
diff --git a/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionary.java b/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionary.java
index f257165cb..67015f491 100644
--- a/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionary.java
+++ b/java/src/com/android/inputmethod/latin/personalization/PersonalizationDictionary.java
@@ -36,8 +36,7 @@ public class PersonalizationDictionary extends ExpandableBinaryDictionary {
     /** Locale for which this user history dictionary is storing words */
     private final String mLocale;
 
-    public PersonalizationDictionary(final Context context, final String locale,
-            final SharedPreferences prefs) {
+    public PersonalizationDictionary(final Context context, final String locale) {
         // TODO: Make isUpdatable true.
         super(context, getFilenameWithLocale(NAME, locale), Dictionary.TYPE_PERSONALIZATION,
                 false /* isUpdatable */);
diff --git a/java/src/com/android/inputmethod/latin/personalization/PersonalizationHelper.java b/java/src/com/android/inputmethod/latin/personalization/PersonalizationHelper.java
index 221ddeeba..a47cc4db9 100644
--- a/java/src/com/android/inputmethod/latin/personalization/PersonalizationHelper.java
+++ b/java/src/com/android/inputmethod/latin/personalization/PersonalizationHelper.java
@@ -41,7 +41,7 @@ public class PersonalizationHelper {
                             CollectionUtils.newConcurrentHashMap();
 
     public static UserHistoryDictionary getUserHistoryDictionary(
-            final Context context, final String locale, final SharedPreferences sp) {
+            final Context context, final String locale) {
         synchronized (sLangUserHistoryDictCache) {
             if (sLangUserHistoryDictCache.containsKey(locale)) {
                 final SoftReference<UserHistoryDictionary> ref =
@@ -55,7 +55,7 @@ public class PersonalizationHelper {
                     return dict;
                 }
             }
-            final UserHistoryDictionary dict = new UserHistoryDictionary(context, locale, sp);
+            final UserHistoryDictionary dict = new UserHistoryDictionary(context, locale);
             sLangUserHistoryDictCache.put(locale, new SoftReference<UserHistoryDictionary>(dict));
             return dict;
         }
@@ -76,17 +76,14 @@ public class PersonalizationHelper {
     public static void registerPersonalizationDictionaryUpdateSession(final Context context,
             final PersonalizationDictionaryUpdateSession session, String locale) {
         final PersonalizationPredictionDictionary predictionDictionary =
-                getPersonalizationPredictionDictionary(context, locale,
-                        PreferenceManager.getDefaultSharedPreferences(context));
+                getPersonalizationPredictionDictionary(context, locale);
         predictionDictionary.registerUpdateSession(session);
-        final PersonalizationDictionary dictionary =
-                getPersonalizationDictionary(context, locale,
-                        PreferenceManager.getDefaultSharedPreferences(context));
+        final PersonalizationDictionary dictionary = getPersonalizationDictionary(context, locale);
         dictionary.registerUpdateSession(session);
     }
 
     public static PersonalizationDictionary getPersonalizationDictionary(
-            final Context context, final String locale, final SharedPreferences sp) {
+            final Context context, final String locale) {
         synchronized (sLangPersonalizationDictCache) {
             if (sLangPersonalizationDictCache.containsKey(locale)) {
                 final SoftReference<PersonalizationDictionary> ref =
@@ -99,8 +96,7 @@ public class PersonalizationHelper {
                     return dict;
                 }
             }
-            final PersonalizationDictionary dict =
-                    new PersonalizationDictionary(context, locale, sp);
+            final PersonalizationDictionary dict = new PersonalizationDictionary(context, locale);
             sLangPersonalizationDictCache.put(
                     locale, new SoftReference<PersonalizationDictionary>(dict));
             return dict;
@@ -108,7 +104,7 @@ public class PersonalizationHelper {
     }
 
     public static PersonalizationPredictionDictionary getPersonalizationPredictionDictionary(
-            final Context context, final String locale, final SharedPreferences sp) {
+            final Context context, final String locale) {
         synchronized (sLangPersonalizationPredictionDictCache) {
             if (sLangPersonalizationPredictionDictCache.containsKey(locale)) {
                 final SoftReference<PersonalizationPredictionDictionary> ref =
@@ -122,7 +118,7 @@ public class PersonalizationHelper {
                 }
             }
             final PersonalizationPredictionDictionary dict =
-                    new PersonalizationPredictionDictionary(context, locale, sp);
+                    new PersonalizationPredictionDictionary(context, locale);
             sLangPersonalizationPredictionDictCache.put(
                     locale, new SoftReference<PersonalizationPredictionDictionary>(dict));
             return dict;
diff --git a/java/src/com/android/inputmethod/latin/personalization/PersonalizationPredictionDictionary.java b/java/src/com/android/inputmethod/latin/personalization/PersonalizationPredictionDictionary.java
index 432954453..16107e29f 100644
--- a/java/src/com/android/inputmethod/latin/personalization/PersonalizationPredictionDictionary.java
+++ b/java/src/com/android/inputmethod/latin/personalization/PersonalizationPredictionDictionary.java
@@ -20,14 +20,12 @@ import com.android.inputmethod.latin.Dictionary;
 import com.android.inputmethod.latin.ExpandableBinaryDictionary;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 
 public class PersonalizationPredictionDictionary extends DecayingExpandableBinaryDictionaryBase {
     private static final String NAME = PersonalizationPredictionDictionary.class.getSimpleName();
 
-    /* package */ PersonalizationPredictionDictionary(final Context context, final String locale,
-            final SharedPreferences sp) {
-        super(context, locale, sp, Dictionary.TYPE_PERSONALIZATION_PREDICTION_IN_JAVA,
+    /* package */ PersonalizationPredictionDictionary(final Context context, final String locale) {
+        super(context, locale, Dictionary.TYPE_PERSONALIZATION_PREDICTION_IN_JAVA,
                 getDictionaryFileName(locale));
     }
 
diff --git a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
index a60226d7e..95a6fe142 100644
--- a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
@@ -20,7 +20,6 @@ import com.android.inputmethod.latin.Dictionary;
 import com.android.inputmethod.latin.ExpandableBinaryDictionary;
 
 import android.content.Context;
-import android.content.SharedPreferences;
 
 /**
  * Locally gathers stats about the words user types and various other signals like auto-correction
@@ -29,9 +28,8 @@ import android.content.SharedPreferences;
 public class UserHistoryDictionary extends DecayingExpandableBinaryDictionaryBase {
     /* package for tests */ static final String NAME =
             UserHistoryDictionary.class.getSimpleName();
-    /* package */ UserHistoryDictionary(final Context context, final String locale,
-            final SharedPreferences sp) {
-        super(context, locale, sp, Dictionary.TYPE_USER_HISTORY, getDictionaryFileName(locale));
+    /* package */ UserHistoryDictionary(final Context context, final String locale) {
+        super(context, locale, Dictionary.TYPE_USER_HISTORY, getDictionaryFileName(locale));
     }
 
     private static String getDictionaryFileName(final String locale) {
diff --git a/java/src/com/android/inputmethod/latin/settings/Settings.java b/java/src/com/android/inputmethod/latin/settings/Settings.java
index df2c6907f..f5c1d102c 100644
--- a/java/src/com/android/inputmethod/latin/settings/Settings.java
+++ b/java/src/com/android/inputmethod/latin/settings/Settings.java
@@ -53,8 +53,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
     public static final String PREF_AUTO_CORRECTION_THRESHOLD = "auto_correction_threshold";
     public static final String PREF_SHOW_SUGGESTIONS_SETTING = "show_suggestions_setting";
     public static final String PREF_MISC_SETTINGS = "misc_settings";
-    public static final String PREF_LAST_USER_DICTIONARY_WRITE_TIME =
-            "last_user_dictionary_write_time";
     public static final String PREF_ADVANCED_SETTINGS = "pref_advanced_settings";
     public static final String PREF_KEY_USE_CONTACTS_DICT = "pref_key_use_contacts_dict";
     public static final String PREF_KEY_USE_DOUBLE_SPACE_PERIOD =
@@ -333,25 +331,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
         return prefs.getBoolean(DebugSettings.PREF_USABILITY_STUDY_MODE, true);
     }
 
-    public static long readLastUserHistoryWriteTime(final SharedPreferences prefs,
-            final String locale) {
-        final String str = prefs.getString(PREF_LAST_USER_DICTIONARY_WRITE_TIME, "");
-        final HashMap<String, Long> map = LocaleUtils.localeAndTimeStrToHashMap(str);
-        if (map.containsKey(locale)) {
-            return map.get(locale);
-        }
-        return 0;
-    }
-
-    public static void writeLastUserHistoryWriteTime(final SharedPreferences prefs,
-            final String locale) {
-        final String oldStr = prefs.getString(PREF_LAST_USER_DICTIONARY_WRITE_TIME, "");
-        final HashMap<String, Long> map = LocaleUtils.localeAndTimeStrToHashMap(oldStr);
-        map.put(locale, System.currentTimeMillis());
-        final String newStr = LocaleUtils.localeAndTimeHashMapToStr(map);
-        prefs.edit().putString(PREF_LAST_USER_DICTIONARY_WRITE_TIME, newStr).apply();
-    }
-
     public static boolean readUseFullscreenMode(final Resources res) {
         return res.getBoolean(R.bool.config_use_fullscreen_mode);
     }
diff --git a/java/src/com/android/inputmethod/latin/utils/LocaleUtils.java b/java/src/com/android/inputmethod/latin/utils/LocaleUtils.java
index 22045aa38..b4ff849f1 100644
--- a/java/src/com/android/inputmethod/latin/utils/LocaleUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/LocaleUtils.java
@@ -30,9 +30,6 @@ import java.util.Locale;
  * dictionary pack.
  */
 public final class LocaleUtils {
-    private static final HashMap<String, Long> EMPTY_LT_HASH_MAP = CollectionUtils.newHashMap();
-    private static final String LOCALE_AND_TIME_STR_SEPARATER = ",";
-
     private LocaleUtils() {
         // Intentional empty constructor for utility class.
     }
@@ -188,38 +185,4 @@ public final class LocaleUtils {
             return retval;
         }
     }
-
-    public static HashMap<String, Long> localeAndTimeStrToHashMap(String str) {
-        if (TextUtils.isEmpty(str)) {
-            return EMPTY_LT_HASH_MAP;
-        }
-        final String[] ss = str.split(LOCALE_AND_TIME_STR_SEPARATER);
-        final int N = ss.length;
-        if (N < 2 || N % 2 != 0) {
-            return EMPTY_LT_HASH_MAP;
-        }
-        final HashMap<String, Long> retval = CollectionUtils.newHashMap();
-        for (int i = 0; i < N / 2; ++i) {
-            final String localeStr = ss[i * 2];
-            final long time = Long.valueOf(ss[i * 2 + 1]);
-            retval.put(localeStr, time);
-        }
-        return retval;
-    }
-
-    public static String localeAndTimeHashMapToStr(HashMap<String, Long> map) {
-        if (map == null || map.isEmpty()) {
-            return "";
-        }
-        final StringBuilder builder = new StringBuilder();
-        for (String localeStr : map.keySet()) {
-            if (builder.length() > 0) {
-                builder.append(LOCALE_AND_TIME_STR_SEPARATER);
-            }
-            final Long time = map.get(localeStr);
-            builder.append(localeStr).append(LOCALE_AND_TIME_STR_SEPARATER);
-            builder.append(String.valueOf(time));
-        }
-        return builder.toString();
-    }
 }