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diff --git a/native/jni/src/gesture/incremental_decoder_wrapper.h b/native/jni/src/gesture/incremental_decoder_wrapper.h
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+++ b/native/jni/src/gesture/incremental_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_INCREMENTAL_DECODER_WRAPPER_H
+#define LATINIME_INCREMENTAL_DECODER_WRAPPER_H
+
+#include <stdint.h>
+#include "defines.h"
+#include "incremental_decoder_interface.h"
+
+namespace latinime {
+
+class UnigramDictionary;
+class BigramDictionary;
+class ProximityInfo;
+
+class IncrementalDecoderWrapper : public IncrementalDecoderInterface {
+ public:
+    IncrementalDecoderWrapper(const int maxWordLength, const int maxWords)
+            : mIncrementalDecoderInterface(getIncrementalDecoderInstance(maxWordLength, maxWords)) {
+    }
+
+    virtual ~IncrementalDecoderWrapper() {
+        delete mIncrementalDecoderInterface;
+    }
+
+    int getSuggestions(ProximityInfo *pInfo, void *traverseSession, int *inputXs, int *inputYs,
+            int *times, int *pointerIds, int *codes, int inputSize, int commitPoint,
+            unsigned short *outWords, int *frequencies, int *outputIndices,
+            int *outputTypes) const {
+        if (!mIncrementalDecoderInterface) {
+            return 0;
+        }
+        return mIncrementalDecoderInterface->getSuggestions(
+                pInfo, traverseSession, inputXs, inputYs, times, pointerIds, codes,
+                inputSize, commitPoint, outWords, frequencies, outputIndices, outputTypes);
+    }
+
+    static void setIncrementalDecoderFactoryMethod(
+            IncrementalDecoderInterface *(*factoryMethod)(int, int)) {
+        sIncrementalDecoderFactoryMethod = factoryMethod;
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalDecoderWrapper);
+    static IncrementalDecoderInterface *getIncrementalDecoderInstance(int maxWordLength,
+            int maxWords) {
+        if (sIncrementalDecoderFactoryMethod) {
+            return sIncrementalDecoderFactoryMethod(maxWordLength, maxWords);
+        }
+        return 0;
+    }
+
+    static IncrementalDecoderInterface *(*sIncrementalDecoderFactoryMethod)(int, int);
+    IncrementalDecoderInterface *mIncrementalDecoderInterface;
+};
+} // namespace latinime
+#endif // LATINIME_INCREMENTAL_DECODER_WRAPPER_H