Merge "Fix a bug where AOSP Latin IME would not fill dictionaries"
diff --git a/dictionaries/cs_wordlist.combined.gz b/dictionaries/cs_wordlist.combined.gz
index b8d4d60..d69ef64 100644
--- a/dictionaries/cs_wordlist.combined.gz
+++ b/dictionaries/cs_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/de_wordlist.combined.gz b/dictionaries/de_wordlist.combined.gz
index 8d0eb6c..f5cce9d 100644
--- a/dictionaries/de_wordlist.combined.gz
+++ b/dictionaries/de_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/en_GB_wordlist.combined.gz b/dictionaries/en_GB_wordlist.combined.gz
index 93c5f3d..5e2a9df 100644
--- a/dictionaries/en_GB_wordlist.combined.gz
+++ b/dictionaries/en_GB_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/en_US_wordlist.combined.gz b/dictionaries/en_US_wordlist.combined.gz
index c2421dc..33ef1c1 100644
--- a/dictionaries/en_US_wordlist.combined.gz
+++ b/dictionaries/en_US_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/en_wordlist.combined.gz b/dictionaries/en_wordlist.combined.gz
index 3732993..c39f052 100644
--- a/dictionaries/en_wordlist.combined.gz
+++ b/dictionaries/en_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/es_wordlist.combined.gz b/dictionaries/es_wordlist.combined.gz
index e7f9125..bf72810 100644
--- a/dictionaries/es_wordlist.combined.gz
+++ b/dictionaries/es_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/fr_wordlist.combined.gz b/dictionaries/fr_wordlist.combined.gz
index 7de4625..4b55261 100644
--- a/dictionaries/fr_wordlist.combined.gz
+++ b/dictionaries/fr_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/hr_wordlist.combined.gz b/dictionaries/hr_wordlist.combined.gz
index 68b15c2..7694a2a 100644
--- a/dictionaries/hr_wordlist.combined.gz
+++ b/dictionaries/hr_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/it_wordlist.combined.gz b/dictionaries/it_wordlist.combined.gz
index 187e3b2..3b84cd7 100644
--- a/dictionaries/it_wordlist.combined.gz
+++ b/dictionaries/it_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/lt_wordlist.combined.gz b/dictionaries/lt_wordlist.combined.gz
index 0197616..316a5af 100644
--- a/dictionaries/lt_wordlist.combined.gz
+++ b/dictionaries/lt_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/lv_wordlist.combined.gz b/dictionaries/lv_wordlist.combined.gz
index f2338c2..b036ac2 100644
--- a/dictionaries/lv_wordlist.combined.gz
+++ b/dictionaries/lv_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/nb_wordlist.combined.gz b/dictionaries/nb_wordlist.combined.gz
index f663bbe..b6e0d42 100644
--- a/dictionaries/nb_wordlist.combined.gz
+++ b/dictionaries/nb_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/nl_wordlist.combined.gz b/dictionaries/nl_wordlist.combined.gz
index 7b4843f..48ab0f4 100644
--- a/dictionaries/nl_wordlist.combined.gz
+++ b/dictionaries/nl_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/ru_wordlist.combined.gz b/dictionaries/ru_wordlist.combined.gz
index 8b67e7c..1c85d66 100644
--- a/dictionaries/ru_wordlist.combined.gz
+++ b/dictionaries/ru_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/sl_wordlist.combined.gz b/dictionaries/sl_wordlist.combined.gz
index c12e7cb..41a576b 100644
--- a/dictionaries/sl_wordlist.combined.gz
+++ b/dictionaries/sl_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/sr_wordlist.combined.gz b/dictionaries/sr_wordlist.combined.gz
index bb85796..dec6ae8 100644
--- a/dictionaries/sr_wordlist.combined.gz
+++ b/dictionaries/sr_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/sv_wordlist.combined.gz b/dictionaries/sv_wordlist.combined.gz
index c107ca9..0471772 100644
--- a/dictionaries/sv_wordlist.combined.gz
+++ b/dictionaries/sv_wordlist.combined.gz
Binary files differ
diff --git a/dictionaries/tr_wordlist.combined.gz b/dictionaries/tr_wordlist.combined.gz
index b330415..fae79ca 100644
--- a/dictionaries/tr_wordlist.combined.gz
+++ b/dictionaries/tr_wordlist.combined.gz
Binary files differ
diff --git a/java/res/raw/main_de.dict b/java/res/raw/main_de.dict
index a59f782..5d35e64 100644
--- a/java/res/raw/main_de.dict
+++ b/java/res/raw/main_de.dict
Binary files differ
diff --git a/java/res/raw/main_en.dict b/java/res/raw/main_en.dict
index 086874d..120e19b 100644
--- a/java/res/raw/main_en.dict
+++ b/java/res/raw/main_en.dict
Binary files differ
diff --git a/java/res/raw/main_es.dict b/java/res/raw/main_es.dict
index ac15d39..efc5075 100644
--- a/java/res/raw/main_es.dict
+++ b/java/res/raw/main_es.dict
Binary files differ
diff --git a/java/res/raw/main_fr.dict b/java/res/raw/main_fr.dict
index 9044c7e..fb43a1a 100644
--- a/java/res/raw/main_fr.dict
+++ b/java/res/raw/main_fr.dict
Binary files differ
diff --git a/java/res/raw/main_it.dict b/java/res/raw/main_it.dict
index e289cef..523f645 100644
--- a/java/res/raw/main_it.dict
+++ b/java/res/raw/main_it.dict
Binary files differ
diff --git a/java/res/raw/main_ru.dict b/java/res/raw/main_ru.dict
index 3e23617..86c368e 100644
--- a/java/res/raw/main_ru.dict
+++ b/java/res/raw/main_ru.dict
Binary files differ
diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java b/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
index f9a36b8..51dc852 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
@@ -19,11 +19,9 @@
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.AssetFileDescriptor;
 import android.util.Log;
 
-import com.android.inputmethod.latin.define.ProductionFlag;
 import com.android.inputmethod.latin.makedict.BinaryDictInputOutput;
 import com.android.inputmethod.latin.makedict.FormatSpec;
 import com.android.inputmethod.latin.utils.CollectionUtils;
diff --git a/java/src/com/android/inputmethod/latin/DebugSettings.java b/java/src/com/android/inputmethod/latin/DebugSettings.java
index d1cb39c..01ec7f9 100644
--- a/java/src/com/android/inputmethod/latin/DebugSettings.java
+++ b/java/src/com/android/inputmethod/latin/DebugSettings.java
@@ -16,21 +16,16 @@
 
 package com.android.inputmethod.latin;
 
-import android.content.Context;
 import android.content.SharedPreferences;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.os.Bundle;
 import android.os.Process;
 import android.preference.CheckBoxPreference;
 import android.preference.Preference;
 import android.preference.PreferenceFragment;
 import android.preference.PreferenceScreen;
-import android.util.Log;
 
 import com.android.inputmethod.keyboard.KeyboardSwitcher;
 import com.android.inputmethod.latin.utils.Utils;
-import com.android.inputmethod.research.ResearchLogger;
 
 public final class DebugSettings extends PreferenceFragment
         implements SharedPreferences.OnSharedPreferenceChangeListener {
diff --git a/java/src/com/android/inputmethod/latin/SettingsValues.java b/java/src/com/android/inputmethod/latin/SettingsValues.java
index 8eadf73..2d325a4 100644
--- a/java/src/com/android/inputmethod/latin/SettingsValues.java
+++ b/java/src/com/android/inputmethod/latin/SettingsValues.java
@@ -34,7 +34,7 @@
 
 /**
  * When you call the constructor of this class, you may want to change the current system locale by
- * using {@link LocaleUtils.RunInLocale}.
+ * using {@link com.android.inputmethod.latin.utils.LocaleUtils.RunInLocale}.
  */
 public final class SettingsValues {
     private static final String TAG = SettingsValues.class.getSimpleName();
diff --git a/java/src/com/android/inputmethod/research/FeedbackActivity.java b/java/src/com/android/inputmethod/research/FeedbackActivity.java
index b985fda..520b88d 100644
--- a/java/src/com/android/inputmethod/research/FeedbackActivity.java
+++ b/java/src/com/android/inputmethod/research/FeedbackActivity.java
@@ -18,7 +18,6 @@
 
 import android.app.Activity;
 import android.os.Bundle;
-import android.widget.CheckBox;
 
 import com.android.inputmethod.latin.R;
 
diff --git a/java/src/com/android/inputmethod/research/FeedbackFragment.java b/java/src/com/android/inputmethod/research/FeedbackFragment.java
index a073829..75fbbf1 100644
--- a/java/src/com/android/inputmethod/research/FeedbackFragment.java
+++ b/java/src/com/android/inputmethod/research/FeedbackFragment.java
@@ -16,7 +16,6 @@
 
 package com.android.inputmethod.research;
 
-import android.app.Activity;
 import android.app.Fragment;
 import android.os.Bundle;
 import android.text.Editable;
diff --git a/java/src/com/android/inputmethod/research/ResearchLog.java b/java/src/com/android/inputmethod/research/ResearchLog.java
index fde2798..88207c0 100644
--- a/java/src/com/android/inputmethod/research/ResearchLog.java
+++ b/java/src/com/android/inputmethod/research/ResearchLog.java
@@ -27,7 +27,6 @@
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.util.concurrent.Callable;
 import java.util.concurrent.Executors;
diff --git a/java/src/com/android/inputmethod/research/UploaderService.java b/java/src/com/android/inputmethod/research/UploaderService.java
index d2db349..8bd46c1 100644
--- a/java/src/com/android/inputmethod/research/UploaderService.java
+++ b/java/src/com/android/inputmethod/research/UploaderService.java
@@ -24,8 +24,6 @@
 import android.os.Bundle;
 import android.os.SystemClock;
 
-import com.android.inputmethod.latin.define.ProductionFlag;
-
 /**
  * Service to invoke the uploader.
  *
@@ -33,8 +31,6 @@
  */
 public final class UploaderService extends IntentService {
     private static final String TAG = UploaderService.class.getSimpleName();
-    private static final boolean DEBUG = false
-            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     public static final long RUN_INTERVAL = AlarmManager.INTERVAL_HOUR;
     public static final String EXTRA_UPLOAD_UNCONDITIONALLY = UploaderService.class.getName()
             + ".extra.UPLOAD_UNCONDITIONALLY";
diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index d5df6b6..f89eea7 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -70,6 +70,7 @@
         proximity_info_state_utils.cpp) \
     suggest/core/policy/weighting.cpp \
     suggest/core/session/dic_traverse_session.cpp \
+    suggest/policyimpl/dictionary/patricia_trie_policy.cpp \
     suggest/policyimpl/gesture/gesture_suggest_policy_factory.cpp \
     $(addprefix suggest/policyimpl/typing/, \
         scoring_params.cpp \
diff --git a/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp b/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
index 2063c39..9bf7ece 100644
--- a/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
+++ b/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
@@ -26,6 +26,7 @@
 #include "suggest/core/dictionary/probability_utils.h"
 #include "suggest/core/layout/proximity_info.h"
 #include "suggest/core/layout/proximity_info_state.h"
+#include "suggest/core/policy/dictionary_structure_policy.h"
 #include "utils/char_utils.h"
 
 namespace latinime {
@@ -36,14 +37,15 @@
 
 /* static */ void DicNodeUtils::initAsRoot(const BinaryDictionaryInfo *const binaryDictionaryInfo,
         const int prevWordNodePos, DicNode *const newRootNode) {
-    newRootNode->initAsRoot(binaryDictionaryInfo->getRootPosition(), prevWordNodePos);
+    newRootNode->initAsRoot(binaryDictionaryInfo->getStructurePolicy()->getRootPosition(),
+            prevWordNodePos);
 }
 
 /*static */ void DicNodeUtils::initAsRootWithPreviousWord(
         const BinaryDictionaryInfo *const binaryDictionaryInfo,
         DicNode *const prevWordLastNode, DicNode *const newRootNode) {
     newRootNode->initAsRootWithPreviousWord(
-            prevWordLastNode, binaryDictionaryInfo->getRootPosition());
+            prevWordLastNode, binaryDictionaryInfo->getStructurePolicy()->getRootPosition());
 }
 
 /* static */ void DicNodeUtils::initByCopy(DicNode *srcNode, DicNode *destNode) {
diff --git a/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp b/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
index 242a9bd..ff304d2 100644
--- a/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
+++ b/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
@@ -150,11 +150,10 @@
 int BigramDictionary::getBigramListPositionForWord(const int *prevWord, const int prevWordLength,
         const bool forceLowerCaseSearch) const {
     if (0 >= prevWordLength) return 0;
-    const uint8_t *const root = mBinaryDictionaryInfo->getDictRoot();
-    int pos = BinaryFormat::getTerminalPosition(root, prevWord, prevWordLength,
-            forceLowerCaseSearch);
-
+    int pos = mBinaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
+            mBinaryDictionaryInfo, prevWord, prevWordLength, forceLowerCaseSearch);
     if (NOT_VALID_WORD == pos) return 0;
+    const uint8_t *const root = mBinaryDictionaryInfo->getDictRoot();
     const uint8_t flags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
     if (0 == (flags & BinaryFormat::FLAG_HAS_BIGRAMS)) return 0;
     if (0 == (flags & BinaryFormat::FLAG_HAS_MULTIPLE_CHARS)) {
@@ -189,8 +188,8 @@
     int pos = getBigramListPositionForWord(word0, length0, false /* forceLowerCaseSearch */);
     // getBigramListPositionForWord returns 0 if this word isn't in the dictionary or has no bigrams
     if (0 == pos) return false;
-    int nextWordPos = BinaryFormat::getTerminalPosition(mBinaryDictionaryInfo->getDictRoot(),
-            word1, length1, false /* forceLowerCaseSearch */);
+    int nextWordPos = mBinaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
+            mBinaryDictionaryInfo, word1, length1, false /* forceLowerCaseSearch */);
     if (NOT_VALID_WORD == nextWordPos) return false;
 
     for (BinaryDictionaryBigramsIterator bigramsIt(mBinaryDictionaryInfo, pos);
diff --git a/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h b/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h
index c921236..7cb3144 100644
--- a/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h
+++ b/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h
@@ -22,11 +22,10 @@
 #include "defines.h"
 #include "suggest/core/dictionary/binary_dictionary_format_utils.h"
 #include "suggest/core/dictionary/binary_dictionary_header.h"
+#include "suggest/policyimpl/dictionary/dictionary_structure_policy_factory.h"
 
 namespace latinime {
 
-class BinaryDictionaryHeader;
-
 class BinaryDictionaryInfo {
  public:
     BinaryDictionaryInfo(const uint8_t *const dictBuf, const int dictSize, const int mmapFd,
@@ -35,7 +34,9 @@
               mDictBufOffset(dictBufOffset), mIsUpdatable(isUpdatable),
               mDictionaryFormat(BinaryDictionaryFormatUtils::detectFormatVersion(
                       mDictBuf, mDictSize)),
-              mDictionaryHeader(this), mDictRoot(mDictBuf + mDictionaryHeader.getSize()) {}
+              mDictionaryHeader(this), mDictRoot(mDictBuf + mDictionaryHeader.getSize()),
+              mStructurePolicy(DictionaryStructurePolicyFactory::getDictionaryStructurePolicy(
+                      mDictionaryFormat)) {}
 
     AK_FORCE_INLINE const uint8_t *getDictBuf() const {
         return mDictBuf;
@@ -61,10 +62,6 @@
         return mDictionaryFormat;
     }
 
-    AK_FORCE_INLINE int getRootPosition() const {
-        return 0;
-    }
-
     AK_FORCE_INLINE const BinaryDictionaryHeader *getHeader() const {
         return &mDictionaryHeader;
     }
@@ -75,6 +72,10 @@
         return mIsUpdatable && isUpdatableDictionaryFormat;
     }
 
+    AK_FORCE_INLINE const DictionaryStructurePolicy *getStructurePolicy() const {
+        return mStructurePolicy;
+    }
+
  private:
     DISALLOW_COPY_AND_ASSIGN(BinaryDictionaryInfo);
 
@@ -86,6 +87,7 @@
     const BinaryDictionaryFormatUtils::FORMAT_VERSION mDictionaryFormat;
     const BinaryDictionaryHeader mDictionaryHeader;
     const uint8_t *const mDictRoot;
+    const DictionaryStructurePolicy *const mStructurePolicy;
 };
 }
 #endif /* LATINIME_BINARY_DICTIONARY_INFO_H */
diff --git a/native/jni/src/suggest/core/dictionary/dictionary.cpp b/native/jni/src/suggest/core/dictionary/dictionary.cpp
index 51f23dc..675b549 100644
--- a/native/jni/src/suggest/core/dictionary/dictionary.cpp
+++ b/native/jni/src/suggest/core/dictionary/dictionary.cpp
@@ -83,27 +83,14 @@
 }
 
 int Dictionary::getProbability(const int *word, int length) const {
-    const uint8_t *const root = mBinaryDictionaryInfo.getDictRoot();
-    int pos = BinaryFormat::getTerminalPosition(root, word, length,
+    const DictionaryStructurePolicy *const structurePolicy =
+            mBinaryDictionaryInfo.getStructurePolicy();
+    int pos = structurePolicy->getTerminalNodePositionOfWord(&mBinaryDictionaryInfo, word, length,
             false /* forceLowerCaseSearch */);
     if (NOT_VALID_WORD == pos) {
         return NOT_A_PROBABILITY;
     }
-    const uint8_t flags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
-    if (flags & (BinaryFormat::FLAG_IS_BLACKLISTED | BinaryFormat::FLAG_IS_NOT_A_WORD)) {
-        // If this is not a word, or if it's a blacklisted entry, it should behave as
-        // having no probability outside of the suggestion process (where it should be used
-        // for shortcuts).
-        return NOT_A_PROBABILITY;
-    }
-    const bool hasMultipleChars = (0 != (BinaryFormat::FLAG_HAS_MULTIPLE_CHARS & flags));
-    if (hasMultipleChars) {
-        pos = BinaryFormat::skipOtherCharacters(root, pos);
-    } else {
-        BinaryFormat::getCodePointAndForwardPointer(root, &pos);
-    }
-    const int unigramProbability = BinaryFormat::readProbabilityWithoutMovingPointer(root, pos);
-    return unigramProbability;
+    return structurePolicy->getUnigramProbability(&mBinaryDictionaryInfo, pos);
 }
 
 bool Dictionary::isValidBigram(const int *word0, int length0, const int *word1, int length1) const {
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_policy_factory.h b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_policy_factory.h
new file mode 100644
index 0000000..5070651
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_policy_factory.h
@@ -0,0 +1,47 @@
+/*
+ * 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.
+ */
+
+#ifndef LATINIME_DICTIONARY_STRUCTURE_POLICY_FACTORY_H
+#define LATINIME_DICTIONARY_STRUCTURE_POLICY_FACTORY_H
+
+#include "defines.h"
+#include "suggest/core/dictionary/binary_dictionary_format_utils.h"
+#include "suggest/policyimpl/dictionary/patricia_trie_policy.h"
+
+namespace latinime {
+
+class DictionaryStructurePolicy;
+
+class DictionaryStructurePolicyFactory {
+ public:
+    static const DictionaryStructurePolicy *getDictionaryStructurePolicy(
+            const BinaryDictionaryFormatUtils::FORMAT_VERSION dictionaryFormat) {
+        switch (dictionaryFormat) {
+            case BinaryDictionaryFormatUtils::VERSION_1:
+                // Fall through
+            case BinaryDictionaryFormatUtils::VERSION_2:
+                return PatriciaTriePolicy::getInstance();
+            default:
+                ASSERT(false);
+                return 0;
+        }
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DictionaryStructurePolicyFactory);
+};
+} // namespace latinime
+#endif // LATINIME_DICTIONARY_STRUCTURE_POLICY_FACTORY_H
diff --git a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.cpp
new file mode 100644
index 0000000..c995af9
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.cpp
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+
+#include "suggest/policyimpl/dictionary/patricia_trie_policy.h"
+
+#include "defines.h"
+#include "suggest/core/dicnode/dic_node.h"
+#include "suggest/core/dicnode/dic_node_vector.h"
+#include "suggest/core/dictionary/binary_dictionary_info.h"
+#include "suggest/core/dictionary/binary_format.h"
+
+namespace latinime {
+
+const PatriciaTriePolicy PatriciaTriePolicy::sInstance;
+
+void PatriciaTriePolicy::createAndGetAllChildNodes(const DicNode *const dicNode,
+        const BinaryDictionaryInfo *const binaryDictionaryInfo,
+        const NodeFilter *const nodeFilter, DicNodeVector *const childDicNodes) const {
+    // TODO: Move children creating methods form DicNodeUtils.
+}
+
+void PatriciaTriePolicy::getWordAtPosition(const BinaryDictionaryInfo *const binaryDictionaryInfo,
+        const int terminalNodePos, const int maxDepth, int *const outWord,
+        int *const outUnigramProbability) const {
+    BinaryFormat::getWordAtAddress(binaryDictionaryInfo->getDictRoot(), terminalNodePos,
+            maxDepth, outWord, outUnigramProbability);
+}
+
+int PatriciaTriePolicy::getTerminalNodePositionOfWord(
+        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+        const int length, const bool forceLowerCaseSearch) const {
+    return BinaryFormat::getTerminalPosition(binaryDictionaryInfo->getDictRoot(), inWord,
+            length, forceLowerCaseSearch);
+}
+
+int PatriciaTriePolicy::getUnigramProbability(
+        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int nodePos) const {
+    const uint8_t *const root = binaryDictionaryInfo->getDictRoot();
+    int pos = nodePos;
+    const uint8_t flags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
+    if (flags & (BinaryFormat::FLAG_IS_BLACKLISTED | BinaryFormat::FLAG_IS_NOT_A_WORD)) {
+        // If this is not a word, or if it's a blacklisted entry, it should behave as
+        // having no probability outside of the suggestion process (where it should be used
+        // for shortcuts).
+        return NOT_A_PROBABILITY;
+    }
+    const bool hasMultipleChars = (0 != (BinaryFormat::FLAG_HAS_MULTIPLE_CHARS & flags));
+    if (hasMultipleChars) {
+        pos = BinaryFormat::skipOtherCharacters(root, pos);
+    } else {
+        BinaryFormat::getCodePointAndForwardPointer(root, &pos);
+    }
+    return BinaryFormat::readProbabilityWithoutMovingPointer(root, pos);
+}
+
+} // namespace latinime
diff --git a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h
new file mode 100644
index 0000000..9b93381
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h
@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+#ifndef LATINIME_PATRICIA_TRIE_POLICY_H
+#define LATINIME_PATRICIA_TRIE_POLICY_H
+
+#include "defines.h"
+#include "suggest/core/policy/dictionary_structure_policy.h"
+
+namespace latinime {
+
+class PatriciaTriePolicy : public DictionaryStructurePolicy {
+ public:
+    static AK_FORCE_INLINE const PatriciaTriePolicy *getInstance() {
+        return &sInstance;
+    }
+
+    AK_FORCE_INLINE int getRootPosition() const {
+        return 0;
+    }
+
+    void createAndGetAllChildNodes(const DicNode *const dicNode,
+            const BinaryDictionaryInfo *const binaryDictionaryInfo,
+            const NodeFilter *const nodeFilter, DicNodeVector *const childDicNodes) const;
+
+    void getWordAtPosition(const BinaryDictionaryInfo *const binaryDictionaryInfo,
+            const int terminalNodePos, const int maxDepth, int *const outWord,
+            int *const outUnigramProbability) const;
+
+    int getTerminalNodePositionOfWord(
+            const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+            const int length, const bool forceLowerCaseSearch) const;
+
+    int getUnigramProbability(const BinaryDictionaryInfo *const binaryDictionaryInfo,
+            const int nodePos) const;
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(PatriciaTriePolicy);
+    static const PatriciaTriePolicy sInstance;
+
+    PatriciaTriePolicy() {}
+    ~PatriciaTriePolicy() {}
+};
+} // namespace latinime
+#endif // LATINIME_PATRICIA_TRIE_POLICY_H