Remove distracter filter from client.

Bug 19296201.

Change-Id: Ic834e5956347cd86a96bd14024c42ad8ee258659

14 files changed, 25 insertions, 823 deletions

diff --git a/java-overridable/src/com/android/inputmethod/latin/DictionaryFacilitatorProvider.java b/java-overridable/src/com/android/inputmethod/latin/DictionaryFacilitatorProvider.java
index 5489de135..205d6487a 100644
--- a/java-overridable/src/com/android/inputmethod/latin/DictionaryFacilitatorProvider.java
+++ b/java-overridable/src/com/android/inputmethod/latin/DictionaryFacilitatorProvider.java
@@ -16,8 +16,6 @@
 
 package com.android.inputmethod.latin;
 
-import android.content.Context;
-
 /**
  * Factory for instantiating DictionaryFacilitator objects.
  */
@@ -25,8 +23,4 @@ public class DictionaryFacilitatorProvider {
     public static DictionaryFacilitator newDictionaryFacilitator() {
         return new DictionaryFacilitatorImpl();
     }
-
-    public static DictionaryFacilitator newDictionaryFacilitator(final Context context) {
-        return new DictionaryFacilitatorImpl(context);
-    }
 }
diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
index 3e4cda47a..f15434208 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
@@ -18,7 +18,6 @@ package com.android.inputmethod.latin;
 
 import android.content.Context;
 import android.util.Pair;
-import android.view.inputmethod.InputMethodSubtype;
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.keyboard.KeyboardLayout;
@@ -28,7 +27,6 @@ import com.android.inputmethod.latin.utils.SuggestionResults;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
@@ -90,8 +88,6 @@ public interface DictionaryFacilitator {
         void onUpdateMainDictionaryAvailability(boolean isMainDictionaryAvailable);
     }
 
-    void updateEnabledSubtypes(final List<InputMethodSubtype> enabledSubtypes);
-
     // TODO: remove this, it's confusing with seamless multiple language switching
     void setIsMonolingualUser(final boolean isMonolingualUser);
 
diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
index dd34faef8..48fe73be4 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
@@ -20,7 +20,6 @@ import android.content.Context;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
-import android.view.inputmethod.InputMethodSubtype;
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.keyboard.KeyboardLayout;
@@ -29,9 +28,6 @@ import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
 import com.android.inputmethod.latin.personalization.UserHistoryDictionary;
 import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
-import com.android.inputmethod.latin.utils.DistracterFilter;
-import com.android.inputmethod.latin.utils.DistracterFilterCheckingExactMatchesAndSuggestions;
-import com.android.inputmethod.latin.utils.DistracterFilterCheckingIsInDictionary;
 import com.android.inputmethod.latin.utils.ExecutorUtils;
 import com.android.inputmethod.latin.utils.SuggestionResults;
 
@@ -42,7 +38,6 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -76,7 +71,6 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
     private volatile CountDownLatch mLatchForWaitingLoadingMainDictionaries = new CountDownLatch(0);
     // To synchronize assigning mDictionaryGroup to ensure closing dictionaries.
     private final Object mLock = new Object();
-    private final DistracterFilter mDistracterFilter;
 
     public static final Map<String, Class<? extends ExpandableBinaryDictionary>>
             DICT_TYPE_TO_CLASS = new HashMap<>();
@@ -233,15 +227,6 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
     }
 
     public DictionaryFacilitatorImpl() {
-        mDistracterFilter = DistracterFilter.EMPTY_DISTRACTER_FILTER;
-    }
-
-    public DictionaryFacilitatorImpl(final Context context) {
-        mDistracterFilter = new DistracterFilterCheckingExactMatchesAndSuggestions(context);
-    }
-
-    public void updateEnabledSubtypes(final List<InputMethodSubtype> enabledSubtypes) {
-        mDistracterFilter.updateEnabledSubtypes(enabledSubtypes);
     }
 
     // TODO: remove this, it's confusing with seamless multiple language switching
@@ -545,7 +530,6 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
                 dictionaryGroup.closeDict(dictType);
             }
         }
-        mDistracterFilter.close();
     }
 
     @UsedForTesting
@@ -659,9 +643,7 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
         // We don't add words with 0-frequency (assuming they would be profanity etc.).
         final boolean isValid = maxFreq > 0;
         UserHistoryDictionary.addToDictionary(userHistoryDictionary, ngramContext, secondWord,
-                isValid, timeStampInSeconds,
-                new DistracterFilterCheckingIsInDictionary(
-                        mDistracterFilter, userHistoryDictionary));
+                isValid, timeStampInSeconds);
     }
 
     private void removeWord(final String dictName, final String word) {
diff --git a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
index 87d46e226..413c5b8a1 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
@@ -31,7 +31,6 @@ import com.android.inputmethod.latin.makedict.WordProperty;
 import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
 import com.android.inputmethod.latin.utils.AsyncResultHolder;
 import com.android.inputmethod.latin.utils.CombinedFormatUtils;
-import com.android.inputmethod.latin.utils.DistracterFilter;
 import com.android.inputmethod.latin.utils.ExecutorUtils;
 import com.android.inputmethod.latin.utils.WordInputEventForPersonalization;
 
@@ -40,7 +39,6 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
-import java.util.concurrent.Callable;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -57,7 +55,6 @@ import javax.annotation.Nullable;
  *
  * A class that extends this abstract class must have a static factory method named
  *   getDictionary(Context context, Locale locale, File dictFile, String dictNamePrefix)
- * @see DictionaryFacilitator#getSubDict(String,Context,Locale,File,String)
  */
 abstract public class ExpandableBinaryDictionary extends Dictionary {
     private static final boolean DEBUG = false;
@@ -172,33 +169,9 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
 
     private static void asyncExecuteTaskWithLock(final Lock lock, final String executorName,
             final Runnable task) {
-        asyncPreCheckAndExecuteTaskWithLock(lock, null /* preCheckTask */, executorName, task);
-    }
-
-    private void asyncPreCheckAndExecuteTaskWithWriteLock(
-            final Callable<Boolean> preCheckTask, final Runnable task) {
-        asyncPreCheckAndExecuteTaskWithLock(mLock.writeLock(), preCheckTask,
-                mDictName /* executorName */, task);
-
-    }
-
-    // Execute task with lock when the result of preCheckTask is true or preCheckTask is null.
-    private static void asyncPreCheckAndExecuteTaskWithLock(final Lock lock,
-            final Callable<Boolean> preCheckTask, final String executorName, final Runnable task) {
-        final String tag = TAG;
         ExecutorUtils.getExecutor(executorName).execute(new Runnable() {
             @Override
             public void run() {
-                if (preCheckTask != null) {
-                    try {
-                        if (!preCheckTask.call().booleanValue()) {
-                            return;
-                        }
-                    } catch (final Exception e) {
-                        Log.e(tag, "The pre check task throws an exception.", e);
-                        return;
-                    }
-                }
                 lock.lock();
                 try {
                     task.run();
@@ -305,17 +278,8 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
         }
     }
 
-    private void updateDictionaryWithWriteLockIfWordIsNotADistracter(
-            @Nonnull final Runnable updateTask,
-            @Nonnull final String word, @Nonnull final DistracterFilter distracterFilter) {
+    private void updateDictionaryWithWriteLock(@Nonnull final Runnable updateTask) {
         reloadDictionaryIfRequired();
-        final Callable<Boolean> preCheckTask = new Callable<Boolean>() {
-            @Override
-            public Boolean call() throws Exception {
-                return !distracterFilter.isDistracterToWordsInDictionaries(
-                        NgramContext.EMPTY_PREV_WORDS_INFO, word, mLocale);
-            }
-        };
         final Runnable task = new Runnable() {
             @Override
             public void run() {
@@ -326,23 +290,22 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                 updateTask.run();
             }
         };
-        asyncPreCheckAndExecuteTaskWithWriteLock(preCheckTask, task);
+        asyncExecuteTaskWithWriteLock(task);
     }
 
     /**
      * Adds unigram information of a word to the dictionary. May overwrite an existing entry.
      */
-    public void addUnigramEntryWithCheckingDistracter(final String word, final int frequency,
+    public void addUnigramEntry(final String word, final int frequency,
             final String shortcutTarget, final int shortcutFreq, final boolean isNotAWord,
-            final boolean isPossiblyOffensive, final int timestamp,
-            @Nonnull final DistracterFilter distracterFilter) {
-        updateDictionaryWithWriteLockIfWordIsNotADistracter(new Runnable() {
+            final boolean isPossiblyOffensive, final int timestamp) {
+        updateDictionaryWithWriteLock(new Runnable() {
             @Override
             public void run() {
                 addUnigramLocked(word, frequency, shortcutTarget, shortcutFreq,
                         isNotAWord, isPossiblyOffensive, timestamp);
             }
-        }, word, distracterFilter);
+        });
     }
 
     protected void addUnigramLocked(final String word, final int frequency,
@@ -430,12 +393,11 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
     }
 
     /**
-     * Update dictionary for the word with the ngramContext if the word is not a distracter.
+     * Update dictionary for the word with the ngramContext.
      */
-    public void updateEntriesForWordWithCheckingDistracter(@Nonnull final NgramContext ngramContext,
-            final String word, final boolean isValidWord, final int count, final int timestamp,
-            @Nonnull final DistracterFilter distracterFilter) {
-        updateDictionaryWithWriteLockIfWordIsNotADistracter(new Runnable() {
+    public void updateEntriesForWord(@Nonnull final NgramContext ngramContext,
+            final String word, final boolean isValidWord, final int count, final int timestamp) {
+        updateDictionaryWithWriteLock(new Runnable() {
             @Override
             public void run() {
                 final BinaryDictionary binaryDictionary = getBinaryDictionary();
@@ -450,7 +412,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                     }
                 }
             }
-        }, word, distracterFilter);
+        });
     }
 
     public interface UpdateEntriesForInputEventsCallback {
@@ -653,7 +615,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
     /**
      * Reloads the dictionary. Access is controlled on a per dictionary file basis.
      */
-    private final void asyncReloadDictionary() {
+    private void asyncReloadDictionary() {
         final AtomicBoolean isReloading = mIsReloading;
         if (!isReloading.compareAndSet(false, true)) {
             return;
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 74ef6481a..c118e4aeb 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -128,7 +128,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
     final Settings mSettings;
     private final DictionaryFacilitator mDictionaryFacilitator =
-            DictionaryFacilitatorProvider.newDictionaryFacilitator(this /* context */);
+            DictionaryFacilitatorProvider.newDictionaryFacilitator();
     final InputLogic mInputLogic = new InputLogic(this /* LatinIME */,
             this /* SuggestionStripViewAccessor */, mDictionaryFacilitator);
     // We expect to have only one decoder in almost all cases, hence the default capacity of 1.
@@ -608,8 +608,6 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         if (!mHandler.hasPendingReopenDictionaries()) {
             resetDictionaryFacilitator(locales);
         }
-        mDictionaryFacilitator.updateEnabledSubtypes(mRichImm.getMyEnabledInputMethodSubtypeList(
-                true /* allowsImplicitlySelectedSubtypes */));
         refreshPersonalizationDictionarySession(currentSettingsValues);
         resetDictionaryFacilitatorIfNecessary();
         mStatsUtilsManager.onLoadSettings(this /* context */, currentSettingsValues,
diff --git a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
index 1d75a3098..b6286b203 100644
--- a/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/personalization/UserHistoryDictionary.java
@@ -25,7 +25,6 @@ import com.android.inputmethod.latin.ExpandableBinaryDictionary;
 import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.define.DecoderSpecificConstants;
 import com.android.inputmethod.latin.define.ProductionFlags;
-import com.android.inputmethod.latin.utils.DistracterFilter;
 
 import java.io.File;
 import java.util.Locale;
@@ -94,15 +93,14 @@ public class UserHistoryDictionary extends DecayingExpandableBinaryDictionaryBas
      * @param word the word the user inputted
      * @param isValid whether the word is valid or not
      * @param timestamp the timestamp when the word has been inputted
-     * @param distracterFilter the filter to check whether the word is a distracter
      */
     public static void addToDictionary(final ExpandableBinaryDictionary userHistoryDictionary,
             @Nonnull final NgramContext ngramContext, final String word, final boolean isValid,
-            final int timestamp, @Nonnull final DistracterFilter distracterFilter) {
+            final int timestamp) {
         if (word.length() > DecoderSpecificConstants.DICTIONARY_MAX_WORD_LENGTH) {
             return;
         }
-        userHistoryDictionary.updateEntriesForWordWithCheckingDistracter(ngramContext, word,
-                isValid, 1 /* count */, timestamp, distracterFilter);
+        userHistoryDictionary.updateEntriesForWord(ngramContext, word,
+                isValid, 1 /* count */, timestamp);
     }
 }
diff --git a/java/src/com/android/inputmethod/latin/utils/DistracterFilter.java b/java/src/com/android/inputmethod/latin/utils/DistracterFilter.java
deleted file mode 100644
index 525212c96..000000000
--- a/java/src/com/android/inputmethod/latin/utils/DistracterFilter.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * 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.utils;
-
-import android.view.inputmethod.InputMethodSubtype;
-
-import com.android.inputmethod.annotations.UsedForTesting;
-import com.android.inputmethod.latin.NgramContext;
-
-import java.util.List;
-import java.util.Locale;
-
-import javax.annotation.Nonnull;
-
-public interface DistracterFilter {
-    /**
-     * Determine whether a word is a distracter to words in dictionaries.
-     *
-     * @param ngramContext the n-gram context
-     * @param testedWord the word that will be tested to see whether it is a distracter to words
-     *                   in dictionaries.
-     * @param locale the locale of word.
-     * @return true if testedWord is a distracter, otherwise false.
-     */
-    public boolean isDistracterToWordsInDictionaries(final NgramContext ngramContext,
-            final String testedWord, final Locale locale);
-
-    @UsedForTesting
-    public int getWordHandlingType(final NgramContext ngramContext, final String testedWord,
-            final Locale locale);
-
-    public void updateEnabledSubtypes(final List<InputMethodSubtype> enabledSubtypes);
-
-    public void close();
-
-    public static final class HandlingType {
-        private final static int REQUIRE_NO_SPECIAL_HANDLINGS = 0x0;
-        private final static int SHOULD_BE_LOWER_CASED = 0x1;
-        private final static int SHOULD_BE_HANDLED_AS_OOV = 0x2;
-
-        public static int getHandlingType(final boolean shouldBeLowerCased, final boolean isOov) {
-            int wordHandlingType = HandlingType.REQUIRE_NO_SPECIAL_HANDLINGS;
-            if (shouldBeLowerCased) {
-                wordHandlingType |= HandlingType.SHOULD_BE_LOWER_CASED;
-            }
-            if (isOov) {
-                wordHandlingType |= HandlingType.SHOULD_BE_HANDLED_AS_OOV;
-            }
-            return wordHandlingType;
-        }
-
-        public static boolean shouldBeLowerCased(final int handlingType) {
-            return (handlingType & SHOULD_BE_LOWER_CASED) != 0;
-        }
-
-        public static boolean shouldBeHandledAsOov(final int handlingType) {
-            return (handlingType & SHOULD_BE_HANDLED_AS_OOV) != 0;
-        }
-    }
-
-    @Nonnull
-    public static final DistracterFilter EMPTY_DISTRACTER_FILTER = new DistracterFilter() {
-        @Override
-        public boolean isDistracterToWordsInDictionaries(NgramContext ngramContext,
-                String testedWord, Locale locale) {
-            return false;
-        }
-
-        @Override
-        public int getWordHandlingType(final NgramContext ngramContext,
-                final String testedWord, final Locale locale) {
-            return HandlingType.REQUIRE_NO_SPECIAL_HANDLINGS;
-        }
-
-        @Override
-        public void close() {
-        }
-
-        @Override
-        public void updateEnabledSubtypes(List<InputMethodSubtype> enabledSubtypes) {
-        }
-    };
-}
diff --git a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java b/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
deleted file mode 100644
index becf13fd9..000000000
--- a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * 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.utils;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-import android.content.Context;
-import android.content.res.Resources;
-import android.text.InputType;
-import android.util.Log;
-import android.util.LruCache;
-import android.util.Pair;
-import android.view.inputmethod.EditorInfo;
-import android.view.inputmethod.InputMethodSubtype;
-
-import com.android.inputmethod.keyboard.Keyboard;
-import com.android.inputmethod.keyboard.KeyboardId;
-import com.android.inputmethod.keyboard.KeyboardLayoutSet;
-import com.android.inputmethod.latin.DictionaryFacilitator;
-import com.android.inputmethod.latin.DictionaryFacilitatorLruCache;
-import com.android.inputmethod.latin.NgramContext;
-import com.android.inputmethod.latin.RichInputMethodSubtype;
-import com.android.inputmethod.latin.SuggestedWords;
-import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
-import com.android.inputmethod.latin.WordComposer;
-import com.android.inputmethod.latin.common.StringUtils;
-import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
-
-/**
- * This class is used to prevent distracters being added to personalization
- * or user history dictionaries
- */
-public class DistracterFilterCheckingExactMatchesAndSuggestions implements DistracterFilter {
-    private static final String TAG =
-            DistracterFilterCheckingExactMatchesAndSuggestions.class.getSimpleName();
-    private static final boolean DEBUG = false;
-
-    private static final int MAX_DISTRACTERS_CACHE_SIZE = 1024;
-
-    private final Context mContext;
-    private final ConcurrentHashMap<Locale, InputMethodSubtype> mLocaleToSubtypeCache;
-    private final ConcurrentHashMap<Locale, Keyboard> mLocaleToKeyboardCache;
-    private final DictionaryFacilitatorLruCache mDictionaryFacilitatorLruCache;
-    // The key is a pair of a locale and a word. The value indicates the word is a distracter to
-    // words of the locale.
-    private final LruCache<Pair<Locale, String>, Boolean> mDistractersCache;
-    private final Object mLock = new Object();
-
-    // If the score of the top suggestion exceeds this value, the tested word (e.g.,
-    // an OOV, a misspelling, or an in-vocabulary word) would be considered as a distracter to
-    // words in dictionary. The greater the threshold is, the less likely the tested word would
-    // become a distracter, which means the tested word will be more likely to be added to
-    // the dictionary.
-    private static final float DISTRACTER_WORD_SCORE_THRESHOLD = 0.4f;
-
-    /**
-     * Create a DistracterFilter instance.
-     *
-     * @param context the context.
-     */
-    public DistracterFilterCheckingExactMatchesAndSuggestions(final Context context) {
-        mContext = context;
-        mLocaleToSubtypeCache = new ConcurrentHashMap<>();
-        mLocaleToKeyboardCache = new ConcurrentHashMap<>();
-        mDictionaryFacilitatorLruCache = new DictionaryFacilitatorLruCache(
-                context, "" /* dictionaryNamePrefix */);
-        mDistractersCache = new LruCache<>(MAX_DISTRACTERS_CACHE_SIZE);
-    }
-
-    @Override
-    public void close() {
-        mLocaleToSubtypeCache.clear();
-        mLocaleToKeyboardCache.clear();
-        mDictionaryFacilitatorLruCache.evictAll();
-        // Don't clear mDistractersCache.
-    }
-
-    @Override
-    public void updateEnabledSubtypes(final List<InputMethodSubtype> enabledSubtypes) {
-        final Map<Locale, InputMethodSubtype> newLocaleToSubtypeMap = new HashMap<>();
-        if (enabledSubtypes != null) {
-            for (final InputMethodSubtype subtype : enabledSubtypes) {
-                final Locale locale = SubtypeLocaleUtils.getSubtypeLocale(subtype);
-                if (newLocaleToSubtypeMap.containsKey(locale)) {
-                    // Multiple subtypes are enabled for one locale.
-                    // TODO: Investigate what we should do for this case.
-                    continue;
-                }
-                newLocaleToSubtypeMap.put(locale, subtype);
-            }
-        }
-        if (mLocaleToSubtypeCache.equals(newLocaleToSubtypeMap)) {
-            // Enabled subtypes have not been changed.
-            return;
-        }
-        // Update subtype and keyboard map for locales that are in the current mapping.
-        for (final Locale locale: mLocaleToSubtypeCache.keySet()) {
-            if (newLocaleToSubtypeMap.containsKey(locale)) {
-                final InputMethodSubtype newSubtype = newLocaleToSubtypeMap.remove(locale);
-                if (newSubtype.equals(newLocaleToSubtypeMap.get(locale))) {
-                    // Mapping has not been changed.
-                    continue;
-                }
-                mLocaleToSubtypeCache.replace(locale, newSubtype);
-            } else {
-                mLocaleToSubtypeCache.remove(locale);
-            }
-            mLocaleToKeyboardCache.remove(locale);
-        }
-        // Add locales that are not in the current mapping.
-        mLocaleToSubtypeCache.putAll(newLocaleToSubtypeMap);
-    }
-
-    private Keyboard getKeyboardForLocale(final Locale locale) {
-        final Keyboard cachedKeyboard = mLocaleToKeyboardCache.get(locale);
-        if (cachedKeyboard != null) {
-            return cachedKeyboard;
-        }
-        final InputMethodSubtype subtype = mLocaleToSubtypeCache.get(locale);
-        if (subtype == null) {
-            return null;
-        }
-        final EditorInfo editorInfo = new EditorInfo();
-        editorInfo.inputType = InputType.TYPE_CLASS_TEXT;
-        final KeyboardLayoutSet.Builder builder = new KeyboardLayoutSet.Builder(
-                mContext, editorInfo);
-        final Resources res = mContext.getResources();
-        final int keyboardWidth = ResourceUtils.getDefaultKeyboardWidth(res);
-        final int keyboardHeight = ResourceUtils.getDefaultKeyboardHeight(res);
-        builder.setKeyboardGeometry(keyboardWidth, keyboardHeight);
-        builder.setSubtype(new RichInputMethodSubtype(subtype));
-        builder.setIsSpellChecker(false /* isSpellChecker */);
-        final KeyboardLayoutSet layoutSet = builder.build();
-        final Keyboard newKeyboard = layoutSet.getKeyboard(KeyboardId.ELEMENT_ALPHABET);
-        mLocaleToKeyboardCache.put(locale, newKeyboard);
-        return newKeyboard;
-    }
-
-    /**
-     * Determine whether a word is a distracter to words in dictionaries.
-     *
-     * @param ngramContext the n-gram context. Not used for now.
-     * @param testedWord the word that will be tested to see whether it is a distracter to words
-     *                   in dictionaries.
-     * @param locale the locale of word.
-     * @return true if testedWord is a distracter, otherwise false.
-     */
-    @Override
-    public boolean isDistracterToWordsInDictionaries(final NgramContext ngramContext,
-            final String testedWord, final Locale locale) {
-        if (locale == null) {
-            return false;
-        }
-        if (!mLocaleToSubtypeCache.containsKey(locale)) {
-            Log.e(TAG, "Locale " + locale + " is not enabled.");
-            // TODO: Investigate what we should do for disabled locales.
-            return false;
-        }
-        final DictionaryFacilitator dictionaryFacilitator =
-                mDictionaryFacilitatorLruCache.get(locale);
-        if (DEBUG) {
-            Log.d(TAG, "testedWord: " + testedWord);
-        }
-        final Pair<Locale, String> cacheKey = new Pair<>(locale, testedWord);
-        final Boolean isCachedDistracter = mDistractersCache.get(cacheKey);
-        if (isCachedDistracter != null && isCachedDistracter) {
-            if (DEBUG) {
-                Log.d(TAG, "isDistracter: true (cache hit)");
-            }
-            return true;
-        }
-
-        final boolean isDistracterCheckedByGetMaxFreqencyOfExactMatches =
-                checkDistracterUsingMaxFreqencyOfExactMatches(dictionaryFacilitator, testedWord);
-        if (isDistracterCheckedByGetMaxFreqencyOfExactMatches) {
-            // Add the pair of locale and word to the cache.
-            mDistractersCache.put(cacheKey, Boolean.TRUE);
-            return true;
-        }
-        if (dictionaryFacilitator.isValidSuggestionWord(testedWord)) {
-            // Valid word is not a distracter.
-            if (DEBUG) {
-                Log.d(TAG, "isDistracter: false (valid word)");
-            }
-            return false;
-        }
-
-        final Keyboard keyboard = getKeyboardForLocale(locale);
-        final boolean isDistracterCheckedByGetSuggestion =
-                checkDistracterUsingGetSuggestions(dictionaryFacilitator, keyboard, testedWord);
-        if (isDistracterCheckedByGetSuggestion) {
-            // Add the pair of locale and word to the cache.
-            mDistractersCache.put(cacheKey, Boolean.TRUE);
-            return true;
-        }
-        return false;
-    }
-
-    private static boolean checkDistracterUsingMaxFreqencyOfExactMatches(
-            final DictionaryFacilitator dictionaryFacilitator, final String testedWord) {
-        // The tested word is a distracter when there is a word that is exact matched to the tested
-        // word and its probability is higher than the tested word's probability.
-        final int perfectMatchFreq = dictionaryFacilitator.getFrequency(testedWord);
-        final int exactMatchFreq = dictionaryFacilitator.getMaxFrequencyOfExactMatches(testedWord);
-        final boolean isDistracter = perfectMatchFreq < exactMatchFreq;
-        if (DEBUG) {
-            Log.d(TAG, "perfectMatchFreq: " + perfectMatchFreq);
-            Log.d(TAG, "exactMatchFreq: " + exactMatchFreq);
-            Log.d(TAG, "isDistracter: " + isDistracter);
-        }
-        return isDistracter;
-    }
-
-    private boolean checkDistracterUsingGetSuggestions(
-            final DictionaryFacilitator dictionaryFacilitator, final Keyboard keyboard,
-            final String testedWord) {
-        if (keyboard == null) {
-            return false;
-        }
-        final SettingsValuesForSuggestion settingsValuesForSuggestion =
-                new SettingsValuesForSuggestion(false /* blockPotentiallyOffensive */,
-                        false /* spaceAwareGestureEnabled */);
-        final int trailingSingleQuotesCount = StringUtils.getTrailingSingleQuotesCount(testedWord);
-        final String consideredWord = trailingSingleQuotesCount > 0 ?
-                testedWord.substring(0, testedWord.length() - trailingSingleQuotesCount) :
-                testedWord;
-        final WordComposer composer = new WordComposer();
-        final int[] codePoints = StringUtils.toCodePointArray(testedWord);
-        final int[] coordinates = keyboard.getCoordinates(codePoints);
-        composer.setComposingWord(codePoints, coordinates);
-        final SuggestionResults suggestionResults;
-        synchronized (mLock) {
-            suggestionResults = dictionaryFacilitator.getSuggestionResults(composer,
-                    NgramContext.EMPTY_PREV_WORDS_INFO,
-                    keyboard.getProximityInfo().getNativeProximityInfo(),
-                    settingsValuesForSuggestion, 0 /* sessionId */,
-                    SuggestedWords.INPUT_STYLE_TYPING,
-                    keyboard.getKeyboardLayout());
-        }
-        if (suggestionResults.isEmpty()) {
-            return false;
-        }
-        final SuggestedWordInfo firstSuggestion = suggestionResults.first();
-        final boolean isDistracter = suggestionExceedsDistracterThreshold(
-                firstSuggestion, consideredWord, DISTRACTER_WORD_SCORE_THRESHOLD);
-        if (DEBUG) {
-            Log.d(TAG, "isDistracter: " + isDistracter);
-        }
-        return isDistracter;
-    }
-
-    private static boolean suggestionExceedsDistracterThreshold(final SuggestedWordInfo suggestion,
-            final String consideredWord, final float distracterThreshold) {
-        if (suggestion == null) {
-            return false;
-        }
-        final int suggestionScore = suggestion.mScore;
-        final float normalizedScore = BinaryDictionaryUtils.calcNormalizedScore(
-                consideredWord, suggestion.mWord, suggestionScore);
-        if (DEBUG) {
-            Log.d(TAG, "normalizedScore: " + normalizedScore);
-            Log.d(TAG, "distracterThreshold: " + distracterThreshold);
-        }
-        if (normalizedScore > distracterThreshold) {
-            return true;
-        }
-        return false;
-    }
-
-    private boolean shouldBeLowerCased(final NgramContext ngramContext, final String testedWord,
-            final Locale locale) {
-        final DictionaryFacilitator dictionaryFacilitator =
-                mDictionaryFacilitatorLruCache.get(locale);
-        if (dictionaryFacilitator.isValidSuggestionWord(testedWord)) {
-            return false;
-        }
-        final String lowerCaseWord = testedWord.toLowerCase(locale);
-        if (testedWord.equals(lowerCaseWord)) {
-            return false;
-        }
-        if (dictionaryFacilitator.isValidSuggestionWord(lowerCaseWord)) {
-            return true;
-        }
-        if (StringUtils.getCapitalizationType(testedWord) == StringUtils.CAPITALIZE_FIRST
-                && !ngramContext.isValid()) {
-            // TODO: Check beginning-of-sentence.
-            return true;
-        }
-        return false;
-    }
-
-    @Override
-    public int getWordHandlingType(final NgramContext ngramContext, final String testedWord,
-            final Locale locale) {
-        // TODO: Use this method for user history dictionary.
-        if (testedWord == null|| locale == null) {
-            return HandlingType.getHandlingType(false /* shouldBeLowerCased */, false /* isOov */);
-        }
-        final boolean shouldBeLowerCased = shouldBeLowerCased(ngramContext, testedWord, locale);
-        final String caseModifiedWord = shouldBeLowerCased
-                ? testedWord.toLowerCase(locale) : testedWord;
-        final boolean isOov = !mDictionaryFacilitatorLruCache.get(locale).isValidSuggestionWord(
-                caseModifiedWord);
-        return HandlingType.getHandlingType(shouldBeLowerCased, isOov);
-    }
-}
diff --git a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingIsInDictionary.java b/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingIsInDictionary.java
deleted file mode 100644
index 4c99fed9f..000000000
--- a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingIsInDictionary.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * 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.utils;
-
-import java.util.List;
-import java.util.Locale;
-
-import android.view.inputmethod.InputMethodSubtype;
-
-import com.android.inputmethod.latin.Dictionary;
-import com.android.inputmethod.latin.NgramContext;
-
-public class DistracterFilterCheckingIsInDictionary implements DistracterFilter {
-    private final DistracterFilter mDistracterFilter;
-    private final Dictionary mDictionary;
-
-    public DistracterFilterCheckingIsInDictionary(final DistracterFilter distracterFilter,
-            final Dictionary dictionary) {
-        mDistracterFilter = distracterFilter;
-        mDictionary = dictionary;
-    }
-
-    @Override
-    public boolean isDistracterToWordsInDictionaries(NgramContext ngramContext,
-            String testedWord, Locale locale) {
-        if (mDictionary.isInDictionary(testedWord)) {
-            // This filter treats entries that are already in the dictionary as non-distracters
-            // because they have passed the filtering in the past.
-            return false;
-        }
-        return mDistracterFilter.isDistracterToWordsInDictionaries(
-                ngramContext, testedWord, locale);
-    }
-
-    @Override
-    public int getWordHandlingType(final NgramContext ngramContext, final String testedWord,
-            final Locale locale) {
-        return mDistracterFilter.getWordHandlingType(ngramContext, testedWord, locale);
-    }
-
-    @Override
-    public void updateEnabledSubtypes(List<InputMethodSubtype> enabledSubtypes) {
-        // Do nothing.
-    }
-
-    @Override
-    public void close() {
-        // Do nothing.
-    }
-}
diff --git a/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java b/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
index e9a0e7a61..fc0a9cb6c 100644
--- a/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
+++ b/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
@@ -23,7 +23,6 @@ import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DecoderSpecificConstants;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
-import com.android.inputmethod.latin.utils.DistracterFilter.HandlingType;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -41,17 +40,15 @@ public final class WordInputEventForPersonalization {
             new int[DecoderSpecificConstants.MAX_PREV_WORD_COUNT_FOR_N_GRAM][];
     public final boolean[] mIsPrevWordBeginningOfSentenceArray =
             new boolean[DecoderSpecificConstants.MAX_PREV_WORD_COUNT_FOR_N_GRAM];
-    public final boolean mIsValid;
     // Time stamp in seconds.
     public final int mTimestamp;
 
     @UsedForTesting
     public WordInputEventForPersonalization(final CharSequence targetWord,
-            final NgramContext ngramContext, final boolean isValid, final int timestamp) {
+            final NgramContext ngramContext, final int timestamp) {
         mTargetWord = StringUtils.toCodePointArray(targetWord);
         mPrevWordsCount = ngramContext.getPrevWordCount();
         ngramContext.outputToArray(mPrevWordArray, mIsPrevWordBeginningOfSentenceArray);
-        mIsValid = isValid;
         mTimestamp = timestamp;
     }
 
@@ -59,8 +56,7 @@ public final class WordInputEventForPersonalization {
     // objects.
     public static ArrayList<WordInputEventForPersonalization> createInputEventFrom(
             final List<String> tokens, final int timestamp,
-            final SpacingAndPunctuations spacingAndPunctuations, final Locale locale,
-            final DistracterFilter distracterFilter) {
+            final SpacingAndPunctuations spacingAndPunctuations, final Locale locale) {
         final ArrayList<WordInputEventForPersonalization> inputEvents = new ArrayList<>();
         final int N = tokens.size();
         NgramContext ngramContext = NgramContext.EMPTY_PREV_WORDS_INFO;
@@ -89,7 +85,7 @@ public final class WordInputEventForPersonalization {
             }
             final WordInputEventForPersonalization inputEvent =
                     detectWhetherVaildWordOrNotAndGetInputEvent(
-                            ngramContext, tempWord, timestamp, locale, distracterFilter);
+                            ngramContext, tempWord, timestamp, locale);
             if (inputEvent == null) {
                 continue;
             }
@@ -101,19 +97,10 @@ public final class WordInputEventForPersonalization {
 
     private static WordInputEventForPersonalization detectWhetherVaildWordOrNotAndGetInputEvent(
             final NgramContext ngramContext, final String targetWord, final int timestamp,
-            final Locale locale, final DistracterFilter distracterFilter) {
+            final Locale locale) {
         if (locale == null) {
             return null;
         }
-        final int wordHandlingType = distracterFilter.getWordHandlingType(ngramContext,
-                targetWord, locale);
-        final String word = HandlingType.shouldBeLowerCased(wordHandlingType) ?
-                targetWord.toLowerCase(locale) : targetWord;
-        if (distracterFilter.isDistracterToWordsInDictionaries(ngramContext, targetWord, locale)) {
-            // The word is a distracter.
-            return null;
-        }
-        return new WordInputEventForPersonalization(word, ngramContext,
-                !HandlingType.shouldBeHandledAsOov(wordHandlingType), timestamp);
+        return new WordInputEventForPersonalization(targetWord, ngramContext, timestamp);
     }
 }
diff --git a/tests/src/com/android/inputmethod/latin/BinaryDictionaryDecayingTests.java b/tests/src/com/android/inputmethod/latin/BinaryDictionaryDecayingTests.java
index cff489dd5..baac0883e 100644
--- a/tests/src/com/android/inputmethod/latin/BinaryDictionaryDecayingTests.java
+++ b/tests/src/com/android/inputmethod/latin/BinaryDictionaryDecayingTests.java
@@ -782,8 +782,7 @@ public class BinaryDictionaryDecayingTests extends AndroidTestCase {
         int prevWordCount = 0;
         for (int i = 0; i < inputEvents.length; i++) {
             final String word = CodePointUtils.generateWord(random, codePointSet);
-            inputEvents[i] = new WordInputEventForPersonalization(word, ngramContext,
-                    true /* isValid */, mCurrentTime);
+            inputEvents[i] = new WordInputEventForPersonalization(word, ngramContext, mCurrentTime);
             unigrams.add(word);
             if (prevWordCount >= 2) {
                 final Pair<String, String> prevWordsPair = bigrams.get(bigrams.size() - 1);
diff --git a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
index 6dddc971b..e1260f608 100644
--- a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
+++ b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
@@ -24,7 +24,6 @@ import com.android.inputmethod.latin.ExpandableBinaryDictionary;
 import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.NgramContext.WordInfo;
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
-import com.android.inputmethod.latin.utils.DistracterFilter;
 
 import java.io.File;
 import java.util.List;
@@ -252,8 +251,7 @@ public class UserHistoryDictionaryTests extends AndroidTestCase {
                 random);
         NgramContext ngramContext = NgramContext.EMPTY_PREV_WORDS_INFO;
         for (final String word : words) {
-            UserHistoryDictionary.addToDictionary(dict, ngramContext, word, true, mCurrentTime,
-                    DistracterFilter.EMPTY_DISTRACTER_FILTER);
+            UserHistoryDictionary.addToDictionary(dict, ngramContext, word, true, mCurrentTime);
             ngramContext = ngramContext.getNextNgramContext(new WordInfo(word));
             dict.waitAllTasksForTests();
             assertTrue(dict.isInDictionary(word));
diff --git a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTestsHelper.java b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTestsHelper.java
index d394c0faa..94105aa12 100644
--- a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTestsHelper.java
+++ b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTestsHelper.java
@@ -21,7 +21,6 @@ import android.content.Context;
 import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.NgramContext.WordInfo;
 import com.android.inputmethod.latin.common.FileUtils;
-import com.android.inputmethod.latin.utils.DistracterFilter;
 
 import java.io.File;
 import java.io.FilenameFilter;
@@ -101,8 +100,7 @@ public class UserHistoryDictionaryTestsHelper {
             final List<String> words, final int timestamp) {
         NgramContext ngramContext = NgramContext.EMPTY_PREV_WORDS_INFO;
         for (final String word : words) {
-            UserHistoryDictionary.addToDictionary(dict, ngramContext, word, true, timestamp,
-                    DistracterFilter.EMPTY_DISTRACTER_FILTER);
+            UserHistoryDictionary.addToDictionary(dict, ngramContext, word, true, timestamp);
             ngramContext = ngramContext.getNextNgramContext(new WordInfo(word));
         }
     }
diff --git a/tests/src/com/android/inputmethod/latin/utils/DistracterFilterTest.java b/tests/src/com/android/inputmethod/latin/utils/DistracterFilterTest.java
deleted file mode 100644
index 8360d53fb..000000000
--- a/tests/src/com/android/inputmethod/latin/utils/DistracterFilterTest.java
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * 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.utils;
-
-import java.util.ArrayList;
-import java.util.Locale;
-
-import android.content.Context;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.LargeTest;
-import android.view.inputmethod.InputMethodSubtype;
-
-import com.android.inputmethod.latin.NgramContext;
-import com.android.inputmethod.latin.RichInputMethodManager;
-import com.android.inputmethod.latin.utils.DistracterFilter.HandlingType;
-
-/**
- * Unit test for DistracterFilter
- */
-@LargeTest
-public class DistracterFilterTest extends AndroidTestCase {
-    private DistracterFilterCheckingExactMatchesAndSuggestions mDistracterFilter;
-
-    @Override
-    protected void setUp() throws Exception {
-        super.setUp();
-        final Context context = getContext();
-        mDistracterFilter = new DistracterFilterCheckingExactMatchesAndSuggestions(context);
-        RichInputMethodManager.init(context);
-        final RichInputMethodManager richImm = RichInputMethodManager.getInstance();
-        final ArrayList<InputMethodSubtype> subtypes = new ArrayList<>();
-        subtypes.add(richImm.findSubtypeByLocaleAndKeyboardLayoutSet(
-                Locale.US.toString(), "qwerty"));
-        subtypes.add(richImm.findSubtypeByLocaleAndKeyboardLayoutSet(
-                Locale.FRENCH.toString(), "azerty"));
-        subtypes.add(richImm.findSubtypeByLocaleAndKeyboardLayoutSet(
-                Locale.GERMAN.toString(), "qwertz"));
-        mDistracterFilter.updateEnabledSubtypes(subtypes);
-    }
-
-    @Override
-    protected void tearDown() {
-        mDistracterFilter.close();
-    }
-
-    public void testIsDistracterToWordsInDictionaries() {
-        final NgramContext EMPTY_PREV_WORDS_INFO = NgramContext.EMPTY_PREV_WORDS_INFO;
-
-        final Locale localeEnUs = new Locale("en", "US");
-        String typedWord;
-
-        typedWord = "Bill";
-        // For this test case, we consider "Bill" is a distracter to "bill".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "nOt";
-        // For this test case, we consider "nOt" is a distracter to "not".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "youre";
-        // For this test case, we consider "youre" is a distracter to "you're".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "Banana";
-        // For this test case, we consider "Banana" is a distracter to "banana".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "orange";
-        // For this test case, we consider "orange" is not a distracter to any word in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "Orange";
-        // For this test case, we consider "Orange" is a distracter to "orange".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "café";
-        // For this test case, we consider "café" is a distracter to "cafe".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "cafe";
-        // For this test case, we consider "cafe" is not a distracter to any word in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "I'll";
-        // For this test case, we consider "I'll" is not a distracter to any word in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "ill";
-        // For this test case, we consider "ill" is a distracter to "I'll"
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "asdfd";
-        // For this test case, we consider "asdfd" is not a distracter to any word in dictionaries.
-        assertFalse(
-                mDistracterFilter.isDistracterToWordsInDictionaries(
-                        EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "thank";
-        // For this test case, we consider "thank" is not a distracter to any other word
-        // in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "thabk";
-        // For this test case, we consider "thabk" is a distracter to "thank"
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "thanks";
-        // For this test case, we consider "thanks" is not a distracter to any other word
-        // in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "thabks";
-        // For this test case, we consider "thabks" is a distracter to "thanks"
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "think";
-        // For this test case, we consider "think" is not a distracter to any other word
-        // in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "thibk";
-        // For this test case, we consider "thibk" is a distracter to "think"
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        typedWord = "tgis";
-        // For this test case, we consider "tgis" is a distracter to "this"
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeEnUs));
-
-        final Locale localeDeDe = new Locale("de");
-
-        typedWord = "fUEr";
-        // For this test case, we consider "fUEr" is a distracter to "für".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeDeDe));
-
-        typedWord = "fuer";
-        // For this test case, we consider "fuer" is a distracter to "für".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeDeDe));
-
-        typedWord = "fur";
-        // For this test case, we consider "fur" is a distracter to "für".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeDeDe));
-
-        final Locale localeFrFr = new Locale("fr");
-
-        typedWord = "a";
-        // For this test case, we consider "a" is a distracter to "à".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeFrFr));
-
-        typedWord = "à";
-        // For this test case, we consider "à" is not a distracter to any word in dictionaries.
-        assertFalse(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeFrFr));
-
-        typedWord = "etre";
-        // For this test case, we consider "etre" is a distracter to "être".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeFrFr));
-
-        typedWord = "États-unis";
-        // For this test case, we consider "États-unis" is a distracter to "États-Unis".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeFrFr));
-
-        typedWord = "ÉtatsUnis";
-        // For this test case, we consider "ÉtatsUnis" is a distracter to "États-Unis".
-        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(
-                EMPTY_PREV_WORDS_INFO, typedWord, localeFrFr));
-    }
-
-    public void testGetWordHandlingType() {
-        final Locale localeEnUs = new Locale("en", "US");
-        final NgramContext EMPTY_PREV_WORDS_INFO = NgramContext.EMPTY_PREV_WORDS_INFO;
-        int handlingType = 0;
-
-        handlingType = mDistracterFilter.getWordHandlingType(EMPTY_PREV_WORDS_INFO,
-                "this", localeEnUs);
-        assertFalse(HandlingType.shouldBeLowerCased(handlingType));
-        assertFalse(HandlingType.shouldBeHandledAsOov(handlingType));
-
-        handlingType = mDistracterFilter.getWordHandlingType(EMPTY_PREV_WORDS_INFO,
-                "This", localeEnUs);
-        assertTrue(HandlingType.shouldBeLowerCased(handlingType));
-        assertFalse(HandlingType.shouldBeHandledAsOov(handlingType));
-
-        handlingType = mDistracterFilter.getWordHandlingType(EMPTY_PREV_WORDS_INFO,
-                "thibk", localeEnUs);
-        assertFalse(HandlingType.shouldBeLowerCased(handlingType));
-        assertTrue(HandlingType.shouldBeHandledAsOov(handlingType));
-    }
-}