BinaryDictUtils.java revision 7b55cd3e2b4966150fa4c44dd43ebfeb77058a43 
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
17package com.android.inputmethod.latin.makedict;
18
19import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
20import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
21import com.android.inputmethod.latin.makedict.FusionDictionary.DictionaryOptions;
22
23import java.io.File;
24import java.util.HashMap;
25
26public class BinaryDictUtils {
27    public static final int USE_BYTE_ARRAY = 1;
28    public static final int USE_BYTE_BUFFER = 2;
29
30    public static final String TEST_DICT_FILE_EXTENSION = ".testDict";
31
32    public static final FormatSpec.FormatOptions VERSION2_OPTIONS =
33            new FormatSpec.FormatOptions(FormatSpec.VERSION2);
34    public static final FormatSpec.FormatOptions VERSION3_OPTIONS =
35            new FormatSpec.FormatOptions(FormatSpec.VERSION3);
36    public static final FormatSpec.FormatOptions VERSION4_OPTIONS_WITHOUT_TIMESTAMP =
37            new FormatSpec.FormatOptions(FormatSpec.VERSION4, false /* hasTimestamp */);
38    public static final FormatSpec.FormatOptions VERSION4_OPTIONS_WITH_TIMESTAMP =
39            new FormatSpec.FormatOptions(FormatSpec.VERSION4, true /* hasTimestamp */);
40
41    public static DictionaryOptions makeDictionaryOptions(final String id, final String version) {
42        final DictionaryOptions options = new DictionaryOptions(new HashMap<String, String>());
43        options.mAttributes.put(FileHeader.DICTIONARY_LOCALE_ATTRIBUTE, "en_US");
44        options.mAttributes.put(FileHeader.DICTIONARY_ID_ATTRIBUTE, id);
45        options.mAttributes.put(FileHeader.DICTIONARY_VERSION_ATTRIBUTE, version);
46        return options;
47    }
48
49    public static File getDictFile(final String name, final String version,
50            final FormatOptions formatOptions, final File directory) {
51        if (formatOptions.mVersion == FormatSpec.VERSION2
52                || formatOptions.mVersion == FormatSpec.VERSION3) {
53            return new File(directory, name + "." + version + TEST_DICT_FILE_EXTENSION);
54        } else if (formatOptions.mVersion == FormatSpec.VERSION4) {
55            return new File(directory, name + "." + version);
56        } else {
57            throw new RuntimeException("the format option has a wrong version : "
58                    + formatOptions.mVersion);
59        }
60    }
61
62    public static DictEncoder getDictEncoder(final File file, final FormatOptions formatOptions,
63            final File cacheDir) {
64        if (formatOptions.mVersion == FormatSpec.VERSION4) {
65            return new Ver4DictEncoder(cacheDir);
66        } else if (formatOptions.mVersion == FormatSpec.VERSION3
67                || formatOptions.mVersion == FormatSpec.VERSION2) {
68            return new Ver3DictEncoder(file);
69        } else {
70            throw new RuntimeException("The format option has a wrong version : "
71                    + formatOptions.mVersion);
72        }
73    }
74
75    public static DictUpdater getDictUpdater(final File file, final FormatOptions formatOptions)
76            throws UnsupportedFormatException {
77        if (formatOptions.mVersion == FormatSpec.VERSION4) {
78            return new Ver4DictUpdater(file, DictDecoder.USE_WRITABLE_BYTEBUFFER);
79        } else if (formatOptions.mVersion == FormatSpec.VERSION3) {
80            return new Ver3DictUpdater(file, DictDecoder.USE_WRITABLE_BYTEBUFFER);
81        } else {
82            throw new UnsupportedFormatException("The format option has a wrong version : "
83                    + formatOptions.mVersion);
84        }
85    }
86}
87