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diff --git a/native/jni/src/gesture/gesture_decoder_wrapper.h b/native/jni/src/gesture/gesture_decoder_wrapper.h
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+++ b/native/jni/src/gesture/gesture_decoder_wrapper.h
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+/*
+ * Copyright (C) 2012 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_GESTURE_DECODER_WRAPPER_H
+#define LATINIME_GESTURE_DECODER_WRAPPER_H
+
+#include <stdint.h>
+#include "defines.h"
+#include "incremental_decoder_interface.h"
+
+namespace latinime {
+
+class UnigramDictionary;
+class BigramDictionary;
+class ProximityInfo;
+
+class GestureDecoderWrapper : public IncrementalDecoderInterface {
+ public:
+    GestureDecoderWrapper(const int maxWordLength, const int maxWords) {
+        mIncrementalDecoderInterface = getGestureDecoderInstance(maxWordLength, maxWords);
+    }
+
+    virtual ~GestureDecoderWrapper() {
+        delete mIncrementalDecoderInterface;
+    }
+
+    int getSuggestions(ProximityInfo *pInfo, int *inputXs, int *inputYs, int *times,
+            int *pointerIds, int *codes, int inputSize, int commitPoint,
+            unsigned short *outWords, int *frequencies, int *outputIndices) {
+        if (!mIncrementalDecoderInterface) {
+            return 0;
+        }
+        return mIncrementalDecoderInterface->getSuggestions(
+                pInfo, inputXs, inputYs, times, pointerIds, codes, inputSize, commitPoint,
+                outWords, frequencies, outputIndices);
+    }
+
+    void reset() {
+        if (!mIncrementalDecoderInterface) {
+            return;
+        }
+        mIncrementalDecoderInterface->reset();
+    }
+
+    void setDict(const UnigramDictionary *dict, const BigramDictionary *bigram,
+            const uint8_t *dictRoot, int rootPos) {
+        if (!mIncrementalDecoderInterface) {
+            return;
+        }
+        mIncrementalDecoderInterface->setDict(dict, bigram, dictRoot, rootPos);
+    }
+
+    void setPrevWord(const int32_t *prevWord, int prevWordLength) {
+        if (!mIncrementalDecoderInterface) {
+            return;
+        }
+        mIncrementalDecoderInterface->setPrevWord(prevWord, prevWordLength);
+    }
+
+    static void setGestureDecoderFactoryMethod(
+            IncrementalDecoderInterface *(*factoryMethod)(int, int)) {
+        sGestureDecoderFactoryMethod = factoryMethod;
+    }
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(GestureDecoderWrapper);
+    static IncrementalDecoderInterface *getGestureDecoderInstance(int maxWordLength, int maxWords) {
+        if (sGestureDecoderFactoryMethod) {
+            return sGestureDecoderFactoryMethod(maxWordLength, maxWords);
+        }
+        return 0;
+    }
+
+    static IncrementalDecoderInterface *(*sGestureDecoderFactoryMethod)(int, int);
+    IncrementalDecoderInterface *mIncrementalDecoderInterface;
+};
+} // namespace latinime
+#endif // LATINIME_GESTURE_DECODER_WRAPPER_H