BinaryDictUtils.java revision 26bd46095a05843e7574dfcf7db53406f215525d 
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 VERSION4_OPTIONS_WITHOUT_TIMESTAMP =
35            new FormatSpec.FormatOptions(FormatSpec.VERSION4, false /* hasTimestamp */);
36    public static final FormatSpec.FormatOptions VERSION4_OPTIONS_WITH_TIMESTAMP =
37            new FormatSpec.FormatOptions(FormatSpec.VERSION4, true /* hasTimestamp */);
38
39    public static DictionaryOptions makeDictionaryOptions(final String id, final String version,
40            final FormatSpec.FormatOptions formatOptions) {
41        final DictionaryOptions options = new DictionaryOptions(new HashMap<String, String>());
42        options.mAttributes.put(FileHeader.DICTIONARY_LOCALE_ATTRIBUTE, "en_US");
43        options.mAttributes.put(FileHeader.DICTIONARY_ID_ATTRIBUTE, id);
44        options.mAttributes.put(FileHeader.DICTIONARY_VERSION_ATTRIBUTE, version);
45        if (formatOptions.mHasTimestamp) {
46            options.mAttributes.put(FileHeader.HAS_HISTORICAL_INFO_ATTRIBUTE,
47                    FileHeader.ATTRIBUTE_VALUE_TRUE);
48            options.mAttributes.put(FileHeader.USES_FORGETTING_CURVE_ATTRIBUTE,
49                    FileHeader.ATTRIBUTE_VALUE_TRUE);
50        }
51        return options;
52    }
53
54    public static File getDictFile(final String name, final String version,
55            final FormatOptions formatOptions, final File directory) {
56        if (formatOptions.mVersion == FormatSpec.VERSION2) {
57            return new File(directory, name + "." + version + TEST_DICT_FILE_EXTENSION);
58        } else if (formatOptions.mVersion == FormatSpec.VERSION4) {
59            return new File(directory, name + "." + version);
60        } else {
61            throw new RuntimeException("the format option has a wrong version : "
62                    + formatOptions.mVersion);
63        }
64    }
65
66    public static DictEncoder getDictEncoder(final File file, final FormatOptions formatOptions) {
67        if (formatOptions.mVersion == FormatSpec.VERSION4) {
68            if (!file.isDirectory()) {
69                file.mkdir();
70            }
71            return new Ver4DictEncoder(file);
72        } else if (formatOptions.mVersion == FormatSpec.VERSION2) {
73            return new Ver2DictEncoder(file);
74        } else {
75            throw new RuntimeException("The format option has a wrong version : "
76                    + formatOptions.mVersion);
77        }
78    }
79}
80