diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h
new file mode 100644
index 0000000..0c2f470
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h
@@ -0,0 +1,36 @@
+/*
+ * 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_DICT_CONTENT_H
+#define LATINIME_DICT_CONTENT_H
+
+#include "defines.h"
+
+namespace latinime {
+
+class DictContent {
+ public:
+    virtual ~DictContent() {}
+    virtual bool isValid() const = 0;
+
+ protected:
+    DictContent() {}
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(DictContent);
+};
+} // namespace latinime
+#endif /* LATINIME_DICT_CONTENT_H */
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
new file mode 100644
index 0000000..e415881
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
@@ -0,0 +1,49 @@
+/*
+ * 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_SINGLE_DICT_CONTENT_H
+#define LATINIME_SINGLE_DICT_CONTENT_H
+
+#include "defines.h"
+#include "suggest/policyimpl/dictionary/structure/v4/content/dict_content.h"
+#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+#include "suggest/policyimpl/dictionary/utils/mmapped_buffer.h"
+
+namespace latinime {
+
+class SingleDictContent : public DictContent {
+ public:
+    SingleDictContent(const char *const dictDirPath, const char *const contentFileName,
+            const bool isUpdatable)
+            : mMmappedBuffer(MmappedBuffer::openBuffer(dictDirPath, contentFileName, isUpdatable)),
+              mExpandableContentBuffer(mMmappedBuffer.get() ? mMmappedBuffer.get()->getBuffer() : 0,
+                      mMmappedBuffer.get() ? mMmappedBuffer.get()->getBufferSize() : 0,
+                      BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE) {}
+
+    virtual ~SingleDictContent() {}
+
+    virtual bool isValid() const {
+        return mMmappedBuffer.get() != 0;
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(SingleDictContent);
+
+    const MmappedBuffer::MmappedBufferPtr mMmappedBuffer;
+    BufferWithExtendableBuffer mExpandableContentBuffer;
+};
+} // namespace latinime
+#endif /* LATINIME_SINGLE_DICT_CONTENT_H */
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h
new file mode 100644
index 0000000..446b51e
--- /dev/null
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h
@@ -0,0 +1,69 @@
+/*
+ * 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_SPARSE_TABLE_DICT_CONTENT_H
+#define LATINIME_SPARSE_TABLE_DICT_CONTENT_H
+
+#include "defines.h"
+#include "suggest/policyimpl/dictionary/structure/v4/content/dict_content.h"
+#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
+#include "suggest/policyimpl/dictionary/utils/mmapped_buffer.h"
+
+namespace latinime {
+
+// TODO: Support multiple contents.
+class SparseTableDictContent : public DictContent {
+ public:
+    AK_FORCE_INLINE SparseTableDictContent(const char *const dictDirPath,
+            const char *const lookupTableFileName, const char *const addressTableFileName,
+            const char *const contentFileName, const bool isUpdatable)
+            : mLookupTableBuffer(
+                      MmappedBuffer::openBuffer(dictDirPath, lookupTableFileName, isUpdatable)),
+              mAddressTableBuffer(
+                      MmappedBuffer::openBuffer(dictDirPath, addressTableFileName, isUpdatable)),
+              mContentBuffer(MmappedBuffer::openBuffer(dictDirPath, contentFileName, isUpdatable)),
+              mExpandableLookupTableBuffer(
+                      mLookupTableBuffer.get() ? mLookupTableBuffer.get()->getBuffer() : 0,
+                      mLookupTableBuffer.get() ? mLookupTableBuffer.get()->getBufferSize() : 0,
+                      BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
+              mExpandableAddressTableBuffer(
+                      mAddressTableBuffer.get() ? mAddressTableBuffer.get()->getBuffer() : 0,
+                      mAddressTableBuffer.get() ? mAddressTableBuffer.get()->getBufferSize() : 0,
+                      BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
+              mExpandableContentBuffer(mContentBuffer.get() ? mContentBuffer.get()->getBuffer() : 0,
+                      mContentBuffer.get() ? mContentBuffer.get()->getBufferSize() : 0,
+                      BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE) {}
+
+    virtual ~SparseTableDictContent() {}
+
+    virtual bool isValid() const {
+        return mLookupTableBuffer.get() != 0 && mAddressTableBuffer.get() != 0
+                && mContentBuffer.get() != 0;
+    }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(SparseTableDictContent);
+
+    // TODO: Have sparse table.
+    const MmappedBuffer::MmappedBufferPtr mLookupTableBuffer;
+    const MmappedBuffer::MmappedBufferPtr mAddressTableBuffer;
+    const MmappedBuffer::MmappedBufferPtr mContentBuffer;
+    BufferWithExtendableBuffer mExpandableLookupTableBuffer;
+    BufferWithExtendableBuffer mExpandableAddressTableBuffer;
+    BufferWithExtendableBuffer mExpandableContentBuffer;
+};
+} // namespace latinime
+#endif /* LATINIME_SPARSE_TABLE_DICT_CONTENT_H */