diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index e14cf5a..4786ef6 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -71,6 +71,7 @@
     suggest/core/policy/weighting.cpp \
     suggest/core/session/dic_traverse_session.cpp \
     $(addprefix suggest/policyimpl/dictionary/, \
+        dictionary_structure_with_buffer_policy_factory.cpp \
         dynamic_patricia_trie_node_reader.cpp \
         dynamic_patricia_trie_policy.cpp \
         dynamic_patricia_trie_reading_utils.cpp \
diff --git a/native/jni/src/suggest/core/dicnode/dic_node_proximity_filter.h b/native/jni/src/suggest/core/dicnode/dic_node_proximity_filter.h
index 1a39f2e..c7ab571 100644
--- a/native/jni/src/suggest/core/dicnode/dic_node_proximity_filter.h
+++ b/native/jni/src/suggest/core/dicnode/dic_node_proximity_filter.h
@@ -20,11 +20,11 @@
 #include "defines.h"
 #include "suggest/core/layout/proximity_info_state.h"
 #include "suggest/core/layout/proximity_info_utils.h"
-#include "suggest/core/policy/dictionary_structure_policy.h"
+#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
 
 namespace latinime {
 
-class DicNodeProximityFilter : public DictionaryStructurePolicy::NodeFilter {
+class DicNodeProximityFilter : public DictionaryStructureWithBufferPolicy::NodeFilter {
  public:
     DicNodeProximityFilter(const ProximityInfoState *const pInfoState,
             const int pointIndex, const bool exactOnly)
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 6b4ef2f..ec70ed3 100644
--- a/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
+++ b/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
@@ -24,7 +24,7 @@
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/multi_bigram_map.h"
 #include "suggest/core/dictionary/probability_utils.h"
-#include "suggest/core/policy/dictionary_structure_policy.h"
+#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
 #include "utils/char_utils.h"
 
 namespace latinime {
@@ -83,7 +83,7 @@
         DicNodeUtils::createAndGetPassingChildNode(dicNode, &childrenFilter, childDicNodes);
     } else {
         binaryDictionaryInfo->getStructurePolicy()->createAndGetAllChildNodes(dicNode,
-                binaryDictionaryInfo, &childrenFilter, childDicNodes);
+                &childrenFilter, childDicNodes);
     }
 }
 
diff --git a/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp b/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
index 3751ae5..d78493b 100644
--- a/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
+++ b/native/jni/src/suggest/core/dictionary/bigram_dictionary.cpp
@@ -116,9 +116,8 @@
     while (bigramsIt.hasNext()) {
         bigramsIt.next();
         const int length = mBinaryDictionaryInfo->getStructurePolicy()->
-                getCodePointsAndProbabilityAndReturnCodePointCount(
-                        mBinaryDictionaryInfo, bigramsIt.getBigramPos(), MAX_WORD_LENGTH,
-                        bigramBuffer, &unigramProbability);
+                getCodePointsAndProbabilityAndReturnCodePointCount(bigramsIt.getBigramPos(),
+                        MAX_WORD_LENGTH, bigramBuffer, &unigramProbability);
         // Due to space constraints, the probability for bigrams is approximate - the lower the
         // unigram probability, the worse the precision. The theoritical maximum error in
         // resulting probability is 8 - although in the practice it's never bigger than 3 or 4
@@ -139,10 +138,9 @@
         const bool forceLowerCaseSearch) const {
     if (0 >= prevWordLength) return NOT_A_DICT_POS;
     int pos = mBinaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
-            mBinaryDictionaryInfo, prevWord, prevWordLength, forceLowerCaseSearch);
+            prevWord, prevWordLength, forceLowerCaseSearch);
     if (NOT_A_VALID_WORD_POS == pos) return NOT_A_DICT_POS;
-    return mBinaryDictionaryInfo->getStructurePolicy()->getBigramsPositionOfNode(
-            mBinaryDictionaryInfo, pos);
+    return mBinaryDictionaryInfo->getStructurePolicy()->getBigramsPositionOfNode(pos);
 }
 
 bool BigramDictionary::isValidBigram(const int *word0, int length0, const int *word1,
@@ -151,7 +149,7 @@
     // getBigramListPositionForWord returns 0 if this word isn't in the dictionary or has no bigrams
     if (NOT_A_DICT_POS == pos) return false;
     int nextWordPos = mBinaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
-            mBinaryDictionaryInfo, word1, length1, false /* forceLowerCaseSearch */);
+            word1, length1, false /* forceLowerCaseSearch */);
     if (NOT_A_VALID_WORD_POS == nextWordPos) return false;
 
     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 cbea18f..c694c6a 100644
--- a/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h
+++ b/native/jni/src/suggest/core/dictionary/binary_dictionary_info.h
@@ -23,7 +23,7 @@
 #include "jni.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"
+#include "suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.h"
 #include "utils/log_utils.h"
 
 namespace latinime {
@@ -37,11 +37,16 @@
               mDictionaryFormat(BinaryDictionaryFormatUtils::detectFormatVersion(
                       mDictBuf, mDictSize)),
               mDictionaryHeader(this), mDictRoot(mDictBuf + mDictionaryHeader.getSize()),
-              mStructurePolicy(DictionaryStructurePolicyFactory::getDictionaryStructurePolicy(
-                      mDictionaryFormat)) {
+              // TODO: Remove.
+              mStructurePolicy(DictionaryStructureWithBufferPolicyFactory
+                      ::newDictionaryStructurePolicy(this)) {
         logDictionaryInfo(env);
     }
 
+    ~BinaryDictionaryInfo() {
+        delete mStructurePolicy;
+    }
+
     AK_FORCE_INLINE const uint8_t *getDictBuf() const {
         return mDictBuf;
     }
@@ -66,6 +71,7 @@
         return mDictionaryFormat;
     }
 
+    // TODO: Move to DictionaryStructurePolicy.
     AK_FORCE_INLINE const BinaryDictionaryHeader *getHeader() const {
         return &mDictionaryHeader;
     }
@@ -76,7 +82,8 @@
         return mIsUpdatable && isUpdatableDictionaryFormat;
     }
 
-    AK_FORCE_INLINE const DictionaryStructurePolicy *getStructurePolicy() const {
+    // TODO: remove
+    AK_FORCE_INLINE const DictionaryStructureWithBufferPolicy *getStructurePolicy() const {
         return mStructurePolicy;
     }
 
@@ -89,9 +96,12 @@
     const int mDictBufOffset;
     const bool mIsUpdatable;
     const BinaryDictionaryFormatUtils::FORMAT_VERSION mDictionaryFormat;
+    // TODO: Move BinaryDictionaryHeader to policyimpl and introduce dedicated API to the
+    // DictionaryStructurePolicy.
     const BinaryDictionaryHeader mDictionaryHeader;
     const uint8_t *const mDictRoot;
-    const DictionaryStructurePolicy *const mStructurePolicy;
+    // TODO: remove
+    const DictionaryStructureWithBufferPolicy *const mStructurePolicy;
 
     AK_FORCE_INLINE void logDictionaryInfo(JNIEnv *const env) const {
         const int BUFFER_SIZE = 16;
diff --git a/native/jni/src/suggest/core/dictionary/dictionary.cpp b/native/jni/src/suggest/core/dictionary/dictionary.cpp
index 4a9e38f..891b803 100644
--- a/native/jni/src/suggest/core/dictionary/dictionary.cpp
+++ b/native/jni/src/suggest/core/dictionary/dictionary.cpp
@@ -83,14 +83,14 @@
 }
 
 int Dictionary::getProbability(const int *word, int length) const {
-    const DictionaryStructurePolicy *const structurePolicy =
+    const DictionaryStructureWithBufferPolicy *const structurePolicy =
             mBinaryDictionaryInfo.getStructurePolicy();
-    int pos = structurePolicy->getTerminalNodePositionOfWord(&mBinaryDictionaryInfo, word, length,
+    int pos = structurePolicy->getTerminalNodePositionOfWord(word, length,
             false /* forceLowerCaseSearch */);
     if (NOT_A_VALID_WORD_POS == pos) {
         return NOT_A_PROBABILITY;
     }
-    return structurePolicy->getUnigramProbability(&mBinaryDictionaryInfo, pos);
+    return structurePolicy->getUnigramProbability(pos);
 }
 
 bool Dictionary::isValidBigram(const int *word0, int length0, const int *word1, int length1) const {
diff --git a/native/jni/src/suggest/core/dictionary/multi_bigram_map.h b/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
index d5eafe1..0854380 100644
--- a/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
+++ b/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
@@ -68,7 +68,7 @@
 
         void init(const BinaryDictionaryInfo *const binaryDictionaryInfo, const int nodePos) {
             const int bigramsListPos = binaryDictionaryInfo->getStructurePolicy()->
-                    getBigramsPositionOfNode(binaryDictionaryInfo, nodePos);
+                    getBigramsPositionOfNode(nodePos);
             BinaryDictionaryBigramsIterator bigramsIt(binaryDictionaryInfo, bigramsListPos);
             while (bigramsIt.hasNext()) {
                 bigramsIt.next();
@@ -108,7 +108,7 @@
             const BinaryDictionaryInfo *const binaryDictionaryInfo, const int nodePos,
             const int nextWordPosition, const int unigramProbability) {
         const int bigramsListPos = binaryDictionaryInfo->getStructurePolicy()->
-                getBigramsPositionOfNode(binaryDictionaryInfo, nodePos);
+                getBigramsPositionOfNode(nodePos);
         BinaryDictionaryBigramsIterator bigramsIt(binaryDictionaryInfo, bigramsListPos);
         while (bigramsIt.hasNext()) {
             bigramsIt.next();
diff --git a/native/jni/src/suggest/core/policy/dictionary_structure_policy.h b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
similarity index 67%
rename from native/jni/src/suggest/core/policy/dictionary_structure_policy.h
rename to native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
index cc14c98..dce4e74 100644
--- a/native/jni/src/suggest/core/policy/dictionary_structure_policy.h
+++ b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
@@ -21,7 +21,6 @@
 
 namespace latinime {
 
-class BinaryDictionaryInfo;
 class DicNode;
 class DicNodeVector;
 
@@ -29,7 +28,7 @@
  * This class abstracts structure of dictionaries.
  * Implement this policy to support additional dictionaries.
  */
-class DictionaryStructurePolicy {
+class DictionaryStructureWithBufferPolicy {
  public:
     // This provides a filtering method for filtering new node.
     class NodeFilter {
@@ -44,36 +43,31 @@
         DISALLOW_COPY_AND_ASSIGN(NodeFilter);
     };
 
+    virtual ~DictionaryStructureWithBufferPolicy() {}
+
     virtual int getRootPosition() const = 0;
 
     virtual void createAndGetAllChildNodes(const DicNode *const dicNode,
-            const BinaryDictionaryInfo *const binaryDictionaryInfo,
             const NodeFilter *const nodeFilter, DicNodeVector *const childDicNodes) const = 0;
 
     virtual int getCodePointsAndProbabilityAndReturnCodePointCount(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo,
             const int nodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const = 0;
 
-    virtual int getTerminalNodePositionOfWord(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+    virtual int getTerminalNodePositionOfWord(const int *const inWord,
             const int length, const bool forceLowerCaseSearch) const = 0;
 
-    virtual int getUnigramProbability(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const = 0;
+    virtual int getUnigramProbability(const int nodePos) const = 0;
 
-    virtual int getShortcutPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const = 0;
+    virtual int getShortcutPositionOfNode(const int nodePos) const = 0;
 
-    virtual int getBigramsPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const = 0;
+    virtual int getBigramsPositionOfNode(const int nodePos) const = 0;
 
  protected:
-    DictionaryStructurePolicy() {}
-    virtual ~DictionaryStructurePolicy() {}
+    DictionaryStructureWithBufferPolicy() {}
 
  private:
-    DISALLOW_COPY_AND_ASSIGN(DictionaryStructurePolicy);
+    DISALLOW_COPY_AND_ASSIGN(DictionaryStructureWithBufferPolicy);
 };
 } // namespace latinime
 #endif /* LATINIME_DICTIONARY_STRUCTURE_POLICY_H */
diff --git a/native/jni/src/suggest/core/session/dic_traverse_session.cpp b/native/jni/src/suggest/core/session/dic_traverse_session.cpp
index 7651b19..11a147b 100644
--- a/native/jni/src/suggest/core/session/dic_traverse_session.cpp
+++ b/native/jni/src/suggest/core/session/dic_traverse_session.cpp
@@ -37,12 +37,12 @@
     }
     // TODO: merge following similar calls to getTerminalPosition into one case-insensitive call.
     mPrevWordPos = binaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
-            binaryDictionaryInfo, prevWord, prevWordLength, false /* forceLowerCaseSearch */);
+            prevWord, prevWordLength, false /* forceLowerCaseSearch */);
     if (mPrevWordPos == NOT_A_VALID_WORD_POS) {
         // Check bigrams for lower-cased previous word if original was not found. Useful for
         // auto-capitalized words like "The [current_word]".
         mPrevWordPos = binaryDictionaryInfo->getStructurePolicy()->getTerminalNodePositionOfWord(
-                binaryDictionaryInfo, prevWord, prevWordLength, true /* forceLowerCaseSearch */);
+                prevWord, prevWordLength, true /* forceLowerCaseSearch */);
     }
 }
 
diff --git a/native/jni/src/suggest/core/session/dic_traverse_session.h b/native/jni/src/suggest/core/session/dic_traverse_session.h
index de57e04..5c4cef0 100644
--- a/native/jni/src/suggest/core/session/dic_traverse_session.h
+++ b/native/jni/src/suggest/core/session/dic_traverse_session.h
@@ -75,7 +75,7 @@
             const int maxPointerCount);
     void resetCache(const int nextActiveCacheSize, const int maxWords);
 
-    // TODO: Remove
+    // TODO: Use DictionaryStructurePolicy instead of BinaryDictionaryInfo.
     const BinaryDictionaryInfo *getBinaryDictionaryInfo() const;
 
     //--------------------
diff --git a/native/jni/src/suggest/core/suggest.cpp b/native/jni/src/suggest/core/suggest.cpp
index 9376d7b..f28efd5 100644
--- a/native/jni/src/suggest/core/suggest.cpp
+++ b/native/jni/src/suggest/core/suggest.cpp
@@ -215,7 +215,7 @@
                     traverseSession->getBinaryDictionaryInfo();
             const TerminalAttributes terminalAttributes(traverseSession->getBinaryDictionaryInfo(),
                     binaryDictionaryInfo->getStructurePolicy()->getShortcutPositionOfNode(
-                            binaryDictionaryInfo, terminalDicNode->getPos()));
+                            terminalDicNode->getPos()));
             // Shortcut is not supported for multiple words suggestions.
             // TODO: Check shortcuts during traversal for multiple words suggestions.
             const bool sameAsTyped = TRAVERSAL->sameAsTyped(traverseSession, terminalDicNode);
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
deleted file mode 100644
index c0df89f..0000000
--- a/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_policy_factory.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * 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/dynamic_patricia_trie_policy.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_2:
-                return PatriciaTriePolicy::getInstance();
-            case BinaryDictionaryFormatUtils::VERSION_3:
-                return DynamicPatriciaTriePolicy::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/dictionary_structure_with_buffer_policy_factory.cpp b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp
new file mode 100644
index 0000000..f2c5862
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp
@@ -0,0 +1,42 @@
+/*
+ * 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/dictionary_structure_with_buffer_policy_factory.h"
+
+#include "defines.h"
+#include "suggest/core/dictionary/binary_dictionary_info.h"
+#include "suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h"
+#include "suggest/policyimpl/dictionary/patricia_trie_policy.h"
+
+namespace latinime {
+
+/* static */ DictionaryStructureWithBufferPolicy *DictionaryStructureWithBufferPolicyFactory
+        ::newDictionaryStructurePolicy(
+        const BinaryDictionaryInfo *const binaryDictionaryInfo) {
+    switch (binaryDictionaryInfo->getFormat()) {
+        case BinaryDictionaryFormatUtils::VERSION_2:
+            return new PatriciaTriePolicy(binaryDictionaryInfo->getDictRoot(),
+                    binaryDictionaryInfo);
+        case BinaryDictionaryFormatUtils::VERSION_3:
+            return new DynamicPatriciaTriePolicy(binaryDictionaryInfo->getDictRoot(),
+                    binaryDictionaryInfo);
+        default:
+            ASSERT(false);
+            return 0;
+    }
+}
+
+} // namespace latinime
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.h b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.h
new file mode 100644
index 0000000..95f82aa
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.h
@@ -0,0 +1,37 @@
+/*
+ * 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_WITH_BUFFER_POLICY_FACTORY_H
+#define LATINIME_DICTIONARY_STRUCTURE_WITH_BUFFER_POLICY_FACTORY_H
+
+#include "defines.h"
+
+#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
+
+namespace latinime {
+
+class BinaryDictionaryInfo;
+
+class DictionaryStructureWithBufferPolicyFactory {
+ public:
+    static DictionaryStructureWithBufferPolicy *newDictionaryStructurePolicy(
+            const BinaryDictionaryInfo *const binaryDictionaryInfo);
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DictionaryStructureWithBufferPolicyFactory);
+};
+} // namespace latinime
+#endif // LATINIME_DICTIONARY_STRUCTURE_WITH_BUFFER_POLICY_FACTORY_H
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.cpp
index 3df5056..bb49bb1 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.cpp
@@ -26,23 +26,21 @@
 
 namespace latinime {
 
-const DynamicPatriciaTriePolicy DynamicPatriciaTriePolicy::sInstance;
 // To avoid infinite loop caused by invalid or malicious forward links.
 const int DynamicPatriciaTriePolicy::MAX_CHILD_COUNT_TO_AVOID_INFINITE_LOOP = 100000;
 
 void DynamicPatriciaTriePolicy::createAndGetAllChildNodes(const DicNode *const dicNode,
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
         const NodeFilter *const nodeFilter, DicNodeVector *const childDicNodes) const {
     if (!dicNode->hasChildren()) {
         return;
     }
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     int mergedNodeCodePoints[MAX_WORD_LENGTH];
     int nextPos = dicNode->getChildrenPos();
     int totalChildCount = 0;
     do {
         const int childCount = PatriciaTrieReadingUtils::getGroupCountAndAdvancePosition(
-                binaryDictionaryInfo->getDictRoot(), &nextPos);
+                mDictRoot, &nextPos);
         totalChildCount += childCount;
         if (childCount <= 0 || totalChildCount > MAX_CHILD_COUNT_TO_AVOID_INFINITE_LOOP) {
             // Invalid dictionary.
@@ -64,13 +62,11 @@
             }
             nextPos = nodeReader.getSiblingNodePos();
         }
-        nextPos = DynamicPatriciaTrieReadingUtils::getForwardLinkPosition(
-                binaryDictionaryInfo->getDictRoot(), nextPos);
+        nextPos = DynamicPatriciaTrieReadingUtils::getForwardLinkPosition(mDictRoot, nextPos);
     } while (DynamicPatriciaTrieReadingUtils::isValidForwardLinkPosition(nextPos));
 }
 
 int DynamicPatriciaTriePolicy::getCodePointsAndProbabilityAndReturnCodePointCount(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
         const int nodePos, const int maxCodePointCount, int *const outCodePoints,
         int *const outUnigramProbability) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
@@ -83,7 +79,7 @@
     int mergedNodeCodePoints[maxCodePointCount];
     int codePointCount = 0;
 
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     // First, read terminal node and get its probability.
     nodeReader.fetchNodeInfoFromBufferAndGetNodeCodePoints(nodePos, maxCodePointCount,
             mergedNodeCodePoints);
@@ -118,8 +114,7 @@
     return codePointCount;
 }
 
-int DynamicPatriciaTriePolicy::getTerminalNodePositionOfWord(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+int DynamicPatriciaTriePolicy::getTerminalNodePositionOfWord(const int *const inWord,
         const int length, const bool forceLowerCaseSearch) const {
     int searchCodePoints[length];
     for (int i = 0; i < length; ++i) {
@@ -128,14 +123,14 @@
     int mergedNodeCodePoints[MAX_WORD_LENGTH];
     int currentLength = 0;
     int pos = getRootPosition();
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     while (currentLength <= length) {
         // When foundMatchedNode becomes true, currentLength is increased at least once.
         bool foundMatchedNode = false;
         int totalChildCount = 0;
         do {
             const int childCount = PatriciaTrieReadingUtils::getGroupCountAndAdvancePosition(
-                    binaryDictionaryInfo->getDictRoot(), &pos);
+                    mDictRoot, &pos);
             totalChildCount += childCount;
             if (childCount <= 0 || totalChildCount > MAX_CHILD_COUNT_TO_AVOID_INFINITE_LOOP) {
                 // Invalid dictionary.
@@ -183,7 +178,7 @@
             // If the matched node is not found in the current node group, try to follow the
             // forward link.
             pos = DynamicPatriciaTrieReadingUtils::getForwardLinkPosition(
-                    binaryDictionaryInfo->getDictRoot(), pos);
+                    mDictRoot, pos);
         } while (DynamicPatriciaTrieReadingUtils::isValidForwardLinkPosition(pos));
         if (!foundMatchedNode) {
             // Matched node is not found.
@@ -195,12 +190,11 @@
     return NOT_A_VALID_WORD_POS;
 }
 
-int DynamicPatriciaTriePolicy::getUnigramProbability(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int nodePos) const {
+int DynamicPatriciaTriePolicy::getUnigramProbability(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_PROBABILITY;
     }
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     nodeReader.fetchNodeInfoFromBuffer(nodePos);
     if (nodeReader.isDeleted() || nodeReader.isBlacklisted() || nodeReader.isNotAWord()) {
         return NOT_A_PROBABILITY;
@@ -208,13 +202,11 @@
     return nodeReader.getProbability();
 }
 
-int DynamicPatriciaTriePolicy::getShortcutPositionOfNode(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
-        const int nodePos) const {
+int DynamicPatriciaTriePolicy::getShortcutPositionOfNode(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_DICT_POS;
     }
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     nodeReader.fetchNodeInfoFromBuffer(nodePos);
     if (nodeReader.isDeleted()) {
         return NOT_A_DICT_POS;
@@ -222,13 +214,11 @@
     return nodeReader.getShortcutPos();
 }
 
-int DynamicPatriciaTriePolicy::getBigramsPositionOfNode(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
-        const int nodePos) const {
+int DynamicPatriciaTriePolicy::getBigramsPositionOfNode(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_DICT_POS;
     }
-    DynamicPatriciaTrieNodeReader nodeReader(binaryDictionaryInfo);
+    DynamicPatriciaTrieNodeReader nodeReader(mBinaryDictionaryInfo);
     nodeReader.fetchNodeInfoFromBuffer(nodePos);
     if (nodeReader.isDeleted()) {
         return NOT_A_DICT_POS;
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h
index 6a79771..e926721 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h
@@ -17,8 +17,10 @@
 #ifndef LATINIME_DYNAMIC_PATRICIA_TRIE_POLICY_H
 #define LATINIME_DYNAMIC_PATRICIA_TRIE_POLICY_H
 
+#include <stdint.h>
+
 #include "defines.h"
-#include "suggest/core/policy/dictionary_structure_policy.h"
+#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
 
 namespace latinime {
 
@@ -26,45 +28,41 @@
 class DicNode;
 class DicNodeVector;
 
-class DynamicPatriciaTriePolicy : public DictionaryStructurePolicy {
+class DynamicPatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
  public:
-    static AK_FORCE_INLINE const DynamicPatriciaTriePolicy *getInstance() {
-        return &sInstance;
-    }
+    DynamicPatriciaTriePolicy(const uint8_t *const dictRoot,
+            const BinaryDictionaryInfo *const binaryDictionaryInfo)
+            : mDictRoot(dictRoot), mBinaryDictionaryInfo(binaryDictionaryInfo) {}
+
+    ~DynamicPatriciaTriePolicy() {}
 
     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;
 
     int getCodePointsAndProbabilityAndReturnCodePointCount(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo,
             const int terminalNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const;
 
-    int getTerminalNodePositionOfWord(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+    int getTerminalNodePositionOfWord(const int *const inWord,
             const int length, const bool forceLowerCaseSearch) const;
 
-    int getUnigramProbability(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getUnigramProbability(const int nodePos) const;
 
-    int getShortcutPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getShortcutPositionOfNode(const int nodePos) const;
 
-    int getBigramsPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getBigramsPositionOfNode(const int nodePos) const;
 
  private:
-    DISALLOW_COPY_AND_ASSIGN(DynamicPatriciaTriePolicy);
-    static const DynamicPatriciaTriePolicy sInstance;
+    DISALLOW_IMPLICIT_CONSTRUCTORS(DynamicPatriciaTriePolicy);
     static const int MAX_CHILD_COUNT_TO_AVOID_INFINITE_LOOP;
 
-    DynamicPatriciaTriePolicy() {}
-    ~DynamicPatriciaTriePolicy() {}
+    const uint8_t *const mDictRoot;
+    // TODO: remove
+    const BinaryDictionaryInfo *const mBinaryDictionaryInfo;
 };
 } // namespace latinime
 #endif // LATINIME_DYNAMIC_PATRICIA_TRIE_POLICY_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
index 097f7c8..fd5f6e7 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.cpp
@@ -27,48 +27,39 @@
 
 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 {
     if (!dicNode->hasChildren()) {
         return;
     }
     int nextPos = dicNode->getChildrenPos();
     const int childCount = PatriciaTrieReadingUtils::getGroupCountAndAdvancePosition(
-            binaryDictionaryInfo->getDictRoot(), &nextPos);
+            mDictRoot, &nextPos);
     for (int i = 0; i < childCount; i++) {
-        nextPos = createAndGetLeavingChildNode(dicNode, nextPos, binaryDictionaryInfo,
-                nodeFilter, childDicNodes);
+        nextPos = createAndGetLeavingChildNode(dicNode, nextPos, nodeFilter, childDicNodes);
     }
 }
 
 int PatriciaTriePolicy::getCodePointsAndProbabilityAndReturnCodePointCount(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
         const int nodePos, const int maxCodePointCount, int *const outCodePoints,
         int *const outUnigramProbability) const {
-    return BinaryFormat::getCodePointsAndProbabilityAndReturnCodePointCount(
-            binaryDictionaryInfo->getDictRoot(), nodePos,
+    return BinaryFormat::getCodePointsAndProbabilityAndReturnCodePointCount(mDictRoot, nodePos,
             maxCodePointCount, outCodePoints, outUnigramProbability);
 }
 
-int PatriciaTriePolicy::getTerminalNodePositionOfWord(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+int PatriciaTriePolicy::getTerminalNodePositionOfWord(const int *const inWord,
         const int length, const bool forceLowerCaseSearch) const {
-    return BinaryFormat::getTerminalPosition(binaryDictionaryInfo->getDictRoot(), inWord,
+    return BinaryFormat::getTerminalPosition(mDictRoot, inWord,
             length, forceLowerCaseSearch);
 }
 
-int PatriciaTriePolicy::getUnigramProbability(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo, const int nodePos) const {
+int PatriciaTriePolicy::getUnigramProbability(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_PROBABILITY;
     }
-    const uint8_t *const dictRoot = binaryDictionaryInfo->getDictRoot();
     int pos = nodePos;
     const PatriciaTrieReadingUtils::NodeFlags flags =
-            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(dictRoot, &pos);
+            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(mDictRoot, &pos);
     if (!PatriciaTrieReadingUtils::isTerminal(flags)) {
         return NOT_A_PROBABILITY;
     }
@@ -79,81 +70,74 @@
         // for shortcuts).
         return NOT_A_PROBABILITY;
     }
-    PatriciaTrieReadingUtils::skipCharacters(dictRoot, flags, MAX_WORD_LENGTH, &pos);
-    return PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(dictRoot, &pos);
+    PatriciaTrieReadingUtils::skipCharacters(mDictRoot, flags, MAX_WORD_LENGTH, &pos);
+    return PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(mDictRoot, &pos);
 }
 
-int PatriciaTriePolicy::getShortcutPositionOfNode(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
-        const int nodePos) const {
+int PatriciaTriePolicy::getShortcutPositionOfNode(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_DICT_POS;
     }
-    const uint8_t *const dictRoot = binaryDictionaryInfo->getDictRoot();
     int pos = nodePos;
     const PatriciaTrieReadingUtils::NodeFlags flags =
-            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(dictRoot, &pos);
+            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(mDictRoot, &pos);
     if (!PatriciaTrieReadingUtils::hasShortcutTargets(flags)) {
         return NOT_A_DICT_POS;
     }
-    PatriciaTrieReadingUtils::skipCharacters(dictRoot, flags, MAX_WORD_LENGTH, &pos);
+    PatriciaTrieReadingUtils::skipCharacters(mDictRoot, flags, MAX_WORD_LENGTH, &pos);
     if (PatriciaTrieReadingUtils::isTerminal(flags)) {
-        PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(dictRoot, &pos);
+        PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(mDictRoot, &pos);
     }
     if (PatriciaTrieReadingUtils::hasChildrenInFlags(flags)) {
-        PatriciaTrieReadingUtils::readChildrenPositionAndAdvancePosition(dictRoot, flags, &pos);
+        PatriciaTrieReadingUtils::readChildrenPositionAndAdvancePosition(mDictRoot, flags, &pos);
     }
     return pos;
 }
 
-int PatriciaTriePolicy::getBigramsPositionOfNode(
-        const BinaryDictionaryInfo *const binaryDictionaryInfo,
-        const int nodePos) const {
+int PatriciaTriePolicy::getBigramsPositionOfNode(const int nodePos) const {
     if (nodePos == NOT_A_VALID_WORD_POS) {
         return NOT_A_DICT_POS;
     }
-    const uint8_t *const dictRoot = binaryDictionaryInfo->getDictRoot();
     int pos = nodePos;
     const PatriciaTrieReadingUtils::NodeFlags flags =
-            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(dictRoot, &pos);
+            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(mDictRoot, &pos);
     if (!PatriciaTrieReadingUtils::hasBigrams(flags)) {
         return NOT_A_DICT_POS;
     }
-    PatriciaTrieReadingUtils::skipCharacters(dictRoot, flags, MAX_WORD_LENGTH, &pos);
+    PatriciaTrieReadingUtils::skipCharacters(mDictRoot, flags, MAX_WORD_LENGTH, &pos);
     if (PatriciaTrieReadingUtils::isTerminal(flags)) {
-        PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(dictRoot, &pos);
+        PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(mDictRoot, &pos);
     }
     if (PatriciaTrieReadingUtils::hasChildrenInFlags(flags)) {
-        PatriciaTrieReadingUtils::readChildrenPositionAndAdvancePosition(dictRoot, flags, &pos);
+        PatriciaTrieReadingUtils::readChildrenPositionAndAdvancePosition(mDictRoot, flags, &pos);
     }
     if (PatriciaTrieReadingUtils::hasShortcutTargets(flags)) {
-        BinaryDictionaryTerminalAttributesReadingUtils::skipShortcuts(binaryDictionaryInfo, &pos);
+        BinaryDictionaryTerminalAttributesReadingUtils::skipShortcuts(mBinaryDictionaryInfo, &pos);
     }
     return pos;
 }
 
 int PatriciaTriePolicy::createAndGetLeavingChildNode(const DicNode *const dicNode,
-        const int nodePos, const BinaryDictionaryInfo *const binaryDictionaryInfo,
-        const NodeFilter *const childrenFilter, DicNodeVector *childDicNodes) const {
-    const uint8_t *const dictRoot = binaryDictionaryInfo->getDictRoot();
+        const int nodePos,  const NodeFilter *const childrenFilter,
+        DicNodeVector *childDicNodes) const {
     int pos = nodePos;
     const PatriciaTrieReadingUtils::NodeFlags flags =
-            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(dictRoot, &pos);
+            PatriciaTrieReadingUtils::getFlagsAndAdvancePosition(mDictRoot, &pos);
     int mergedNodeCodePoints[MAX_WORD_LENGTH];
     const int mergedNodeCodePointCount = PatriciaTrieReadingUtils::getCharsAndAdvancePosition(
-            dictRoot, flags, MAX_WORD_LENGTH, mergedNodeCodePoints, &pos);
+            mDictRoot, flags, MAX_WORD_LENGTH, mergedNodeCodePoints, &pos);
     const int probability = (PatriciaTrieReadingUtils::isTerminal(flags))?
-            PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(dictRoot, &pos)
+            PatriciaTrieReadingUtils::readProbabilityAndAdvancePosition(mDictRoot, &pos)
                     : NOT_A_PROBABILITY;
     const int childrenPos = PatriciaTrieReadingUtils::hasChildrenInFlags(flags) ?
             PatriciaTrieReadingUtils::readChildrenPositionAndAdvancePosition(
-                    dictRoot, flags, &pos) : NOT_A_DICT_POS;
+                    mDictRoot, flags, &pos) : NOT_A_DICT_POS;
     if (PatriciaTrieReadingUtils::hasShortcutTargets(flags)) {
-        BinaryDictionaryTerminalAttributesReadingUtils::skipShortcuts(binaryDictionaryInfo, &pos);
+        BinaryDictionaryTerminalAttributesReadingUtils::skipShortcuts(mBinaryDictionaryInfo, &pos);
     }
     if (PatriciaTrieReadingUtils::hasBigrams(flags)) {
         BinaryDictionaryTerminalAttributesReadingUtils::skipExistingBigrams(
-                binaryDictionaryInfo, &pos);
+                mBinaryDictionaryInfo, &pos);
     }
     if (!childrenFilter->isFilteredOut(mergedNodeCodePoints[0])) {
         childDicNodes->pushLeavingChild(dicNode, nodePos, childrenPos, probability,
diff --git a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h
index 71f256e..e103412 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_policy.h
@@ -17,52 +17,53 @@
 #ifndef LATINIME_PATRICIA_TRIE_POLICY_H
 #define LATINIME_PATRICIA_TRIE_POLICY_H
 
+#include <stdint.h>
+
 #include "defines.h"
-#include "suggest/core/policy/dictionary_structure_policy.h"
+#include "suggest/core/policy/dictionary_structure_with_buffer_policy.h"
 
 namespace latinime {
 
-class PatriciaTriePolicy : public DictionaryStructurePolicy {
+class BinaryDictionaryInfo;
+class DicNode;
+class DicNodeVector;
+
+class PatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
  public:
-    static AK_FORCE_INLINE const PatriciaTriePolicy *getInstance() {
-        return &sInstance;
-    }
+    PatriciaTriePolicy(const uint8_t *const dictRoot,
+            const BinaryDictionaryInfo *const binaryDictionaryInfo)
+            : mDictRoot(dictRoot), mBinaryDictionaryInfo(binaryDictionaryInfo) {}
+
+    ~PatriciaTriePolicy() {}
 
     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;
 
     int getCodePointsAndProbabilityAndReturnCodePointCount(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo,
             const int terminalNodePos, const int maxCodePointCount, int *const outCodePoints,
             int *const outUnigramProbability) const;
 
-    int getTerminalNodePositionOfWord(
-            const BinaryDictionaryInfo *const binaryDictionaryInfo, const int *const inWord,
+    int getTerminalNodePositionOfWord(const int *const inWord,
             const int length, const bool forceLowerCaseSearch) const;
 
-    int getUnigramProbability(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getUnigramProbability(const int nodePos) const;
 
-    int getShortcutPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getShortcutPositionOfNode(const int nodePos) const;
 
-    int getBigramsPositionOfNode(const BinaryDictionaryInfo *const binaryDictionaryInfo,
-            const int nodePos) const;
+    int getBigramsPositionOfNode(const int nodePos) const;
 
  private:
-    DISALLOW_COPY_AND_ASSIGN(PatriciaTriePolicy);
-    static const PatriciaTriePolicy sInstance;
+    DISALLOW_IMPLICIT_CONSTRUCTORS(PatriciaTriePolicy);
 
-    PatriciaTriePolicy() {}
-    ~PatriciaTriePolicy() {}
+    const uint8_t *const mDictRoot;
+    // TODO: remove
+    const BinaryDictionaryInfo *const mBinaryDictionaryInfo;
 
     int createAndGetLeavingChildNode(const DicNode *const dicNode, const int nodePos,
-            const BinaryDictionaryInfo *const binaryDictionaryInfo,
             const NodeFilter *const nodeFilter, DicNodeVector *const childDicNodes) const;
 };
 } // namespace latinime