1 /*
2 * Copyright (C) 2014 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 #define LOG_TAG "LatinIME: jni: BinaryDictionaryUtils"
18
19 #include "com_android_inputmethod_latin_BinaryDictionaryUtils.h"
20
21 #include "defines.h"
22 #include "jni.h"
23 #include "jni_common.h"
24 #include "suggest/policyimpl/dictionary/utils/dict_file_writing_utils.h"
25 #include "utils/autocorrection_threshold_utils.h"
26 #include "utils/char_utils.h"
27 #include "utils/jni_data_utils.h"
28 #include "utils/time_keeper.h"
29
30 namespace latinime {
31
latinime_BinaryDictionaryUtils_createEmptyDictFile(JNIEnv * env,jclass clazz,jstring filePath,jlong dictVersion,jstring locale,jobjectArray attributeKeyStringArray,jobjectArray attributeValueStringArray)32 static jboolean latinime_BinaryDictionaryUtils_createEmptyDictFile(JNIEnv *env, jclass clazz,
33 jstring filePath, jlong dictVersion, jstring locale, jobjectArray attributeKeyStringArray,
34 jobjectArray attributeValueStringArray) {
35 const jsize filePathUtf8Length = env->GetStringUTFLength(filePath);
36 char filePathChars[filePathUtf8Length + 1];
37 env->GetStringUTFRegion(filePath, 0, env->GetStringLength(filePath), filePathChars);
38 filePathChars[filePathUtf8Length] = '\0';
39
40 const jsize localeUtf8Length = env->GetStringUTFLength(locale);
41 char localeChars[localeUtf8Length + 1];
42 env->GetStringUTFRegion(locale, 0, env->GetStringLength(locale), localeChars);
43 localeChars[localeUtf8Length] = '\0';
44 std::vector<int> localeCodePoints;
45 HeaderReadWriteUtils::insertCharactersIntoVector(localeChars, &localeCodePoints);
46
47 const int keyCount = env->GetArrayLength(attributeKeyStringArray);
48 const int valueCount = env->GetArrayLength(attributeValueStringArray);
49 if (keyCount != valueCount) {
50 return false;
51 }
52 DictionaryHeaderStructurePolicy::AttributeMap attributeMap =
53 JniDataUtils::constructAttributeMap(env, attributeKeyStringArray,
54 attributeValueStringArray);
55 return DictFileWritingUtils::createEmptyDictFile(filePathChars, static_cast<int>(dictVersion),
56 localeCodePoints, &attributeMap);
57 }
58
latinime_BinaryDictionaryUtils_calcNormalizedScore(JNIEnv * env,jclass clazz,jintArray before,jintArray after,jint score)59 static jfloat latinime_BinaryDictionaryUtils_calcNormalizedScore(JNIEnv *env, jclass clazz,
60 jintArray before, jintArray after, jint score) {
61 jsize beforeLength = env->GetArrayLength(before);
62 jsize afterLength = env->GetArrayLength(after);
63 int beforeCodePoints[beforeLength];
64 int afterCodePoints[afterLength];
65 env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
66 env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
67 return AutocorrectionThresholdUtils::calcNormalizedScore(beforeCodePoints, beforeLength,
68 afterCodePoints, afterLength, score);
69 }
70
latinime_BinaryDictionaryUtils_editDistance(JNIEnv * env,jclass clazz,jintArray before,jintArray after)71 static jint latinime_BinaryDictionaryUtils_editDistance(JNIEnv *env, jclass clazz, jintArray before,
72 jintArray after) {
73 jsize beforeLength = env->GetArrayLength(before);
74 jsize afterLength = env->GetArrayLength(after);
75 int beforeCodePoints[beforeLength];
76 int afterCodePoints[afterLength];
77 env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
78 env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
79 return AutocorrectionThresholdUtils::editDistance(beforeCodePoints, beforeLength,
80 afterCodePoints, afterLength);
81 }
82
latinime_BinaryDictionaryUtils_setCurrentTimeForTest(JNIEnv * env,jclass clazz,jint currentTime)83 static int latinime_BinaryDictionaryUtils_setCurrentTimeForTest(JNIEnv *env, jclass clazz,
84 jint currentTime) {
85 if (currentTime >= 0) {
86 TimeKeeper::startTestModeWithForceCurrentTime(currentTime);
87 } else {
88 TimeKeeper::stopTestMode();
89 }
90 TimeKeeper::setCurrentTime();
91 return TimeKeeper::peekCurrentTime();
92 }
93
94 static const JNINativeMethod sMethods[] = {
95 {
96 const_cast<char *>("createEmptyDictFileNative"),
97 const_cast<char *>(
98 "(Ljava/lang/String;JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)Z"),
99 reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_createEmptyDictFile)
100 },
101 {
102 const_cast<char *>("calcNormalizedScoreNative"),
103 const_cast<char *>("([I[II)F"),
104 reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_calcNormalizedScore)
105 },
106 {
107 const_cast<char *>("editDistanceNative"),
108 const_cast<char *>("([I[I)I"),
109 reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_editDistance)
110 },
111 {
112 const_cast<char *>("setCurrentTimeForTestNative"),
113 const_cast<char *>("(I)I"),
114 reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_setCurrentTimeForTest)
115 }
116 };
117
register_BinaryDictionaryUtils(JNIEnv * env)118 int register_BinaryDictionaryUtils(JNIEnv *env) {
119 const char *const kClassPathName = "com/android/inputmethod/latin/utils/BinaryDictionaryUtils";
120 return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
121 }
122 } // namespace latinime
123