1/*
2 * Copyright (C) 2013, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef LATINIME_VER4_PATRICIA_TRIE_NODE_READER_H
18#define LATINIME_VER4_PATRICIA_TRIE_NODE_READER_H
19
20#include "defines.h"
21#include "dictionary/structure/pt_common/pt_node_params.h"
22#include "dictionary/structure/pt_common/pt_node_reader.h"
23
24namespace latinime {
25
26class BufferWithExtendableBuffer;
27class HeaderPolicy;
28class LanguageModelDictContent;
29
30/*
31 * This class is used for helping to read nodes of ver4 patricia trie. This class handles moved
32 * node and reads node attributes.
33 */
34class Ver4PatriciaTrieNodeReader : public PtNodeReader {
35 public:
36    explicit Ver4PatriciaTrieNodeReader(const BufferWithExtendableBuffer *const buffer)
37            : mBuffer(buffer) {}
38
39    ~Ver4PatriciaTrieNodeReader() {}
40
41    virtual const PtNodeParams fetchPtNodeParamsInBufferFromPtNodePos(const int ptNodePos) const {
42        return fetchPtNodeInfoFromBufferAndProcessMovedPtNode(ptNodePos,
43                NOT_A_DICT_POS /* siblingNodePos */);
44    }
45
46 private:
47    DISALLOW_COPY_AND_ASSIGN(Ver4PatriciaTrieNodeReader);
48
49    const BufferWithExtendableBuffer *const mBuffer;
50
51    const PtNodeParams fetchPtNodeInfoFromBufferAndProcessMovedPtNode(const int ptNodePos,
52            const int siblingNodePos) const;
53};
54} // namespace latinime
55#endif /* LATINIME_VER4_PATRICIA_TRIE_NODE_READER_H */
56