Separate utility methods from BinaryDictionary in native code.

Bug: 8187060
Change-Id: I099de557d2aaee95c6b809450108139550e9b0aa

1 files changed, 136 insertions, 0 deletions

diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp
new file mode 100644
index 000000000..64034e78a
--- /dev/null
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#define LOG_TAG "LatinIME: jni: BinaryDictionaryUtils"
+
+#include "com_android_inputmethod_latin_BinaryDictionaryUtils.h"
+
+#include "defines.h"
+#include "jni.h"
+#include "jni_common.h"
+#include "suggest/policyimpl/dictionary/utils/dict_file_writing_utils.h"
+#include "utils/autocorrection_threshold_utils.h"
+#include "utils/char_utils.h"
+#include "utils/time_keeper.h"
+
+namespace latinime {
+
+static jboolean latinime_BinaryDictionaryUtils_createEmptyDictFile(JNIEnv *env, jclass clazz,
+        jstring filePath, jlong dictVersion, jstring locale, jobjectArray attributeKeyStringArray,
+        jobjectArray attributeValueStringArray) {
+    const jsize filePathUtf8Length = env->GetStringUTFLength(filePath);
+    char filePathChars[filePathUtf8Length + 1];
+    env->GetStringUTFRegion(filePath, 0, env->GetStringLength(filePath), filePathChars);
+    filePathChars[filePathUtf8Length] = '\0';
+    jsize localeLength = env->GetStringLength(locale);
+    jchar localeCodePoints[localeLength];
+    env->GetStringRegion(locale, 0, localeLength, localeCodePoints);
+    const int keyCount = env->GetArrayLength(attributeKeyStringArray);
+    const int valueCount = env->GetArrayLength(attributeValueStringArray);
+    if (keyCount != valueCount) {
+        return false;
+    }
+
+    DictionaryHeaderStructurePolicy::AttributeMap attributeMap;
+    for (int i = 0; i < keyCount; i++) {
+        jstring keyString = static_cast<jstring>(
+                env->GetObjectArrayElement(attributeKeyStringArray, i));
+        const jsize keyUtf8Length = env->GetStringUTFLength(keyString);
+        char keyChars[keyUtf8Length + 1];
+        env->GetStringUTFRegion(keyString, 0, env->GetStringLength(keyString), keyChars);
+        keyChars[keyUtf8Length] = '\0';
+        DictionaryHeaderStructurePolicy::AttributeMap::key_type key;
+        HeaderReadWriteUtils::insertCharactersIntoVector(keyChars, &key);
+
+        jstring valueString = static_cast<jstring>(
+                env->GetObjectArrayElement(attributeValueStringArray, i));
+        const jsize valueUtf8Length = env->GetStringUTFLength(valueString);
+        char valueChars[valueUtf8Length + 1];
+        env->GetStringUTFRegion(valueString, 0, env->GetStringLength(valueString), valueChars);
+        valueChars[valueUtf8Length] = '\0';
+        DictionaryHeaderStructurePolicy::AttributeMap::mapped_type value;
+        HeaderReadWriteUtils::insertCharactersIntoVector(valueChars, &value);
+        attributeMap[key] = value;
+    }
+
+    return DictFileWritingUtils::createEmptyDictFile(filePathChars, static_cast<int>(dictVersion),
+            CharUtils::convertShortArrayToIntVector(localeCodePoints, localeLength), &attributeMap);
+}
+
+static jfloat latinime_BinaryDictionaryUtils_calcNormalizedScore(JNIEnv *env, jclass clazz,
+        jintArray before, jintArray after, jint score) {
+    jsize beforeLength = env->GetArrayLength(before);
+    jsize afterLength = env->GetArrayLength(after);
+    int beforeCodePoints[beforeLength];
+    int afterCodePoints[afterLength];
+    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
+    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
+    return AutocorrectionThresholdUtils::calcNormalizedScore(beforeCodePoints, beforeLength,
+            afterCodePoints, afterLength, score);
+}
+
+static jint latinime_BinaryDictionaryUtils_editDistance(JNIEnv *env, jclass clazz, jintArray before,
+        jintArray after) {
+    jsize beforeLength = env->GetArrayLength(before);
+    jsize afterLength = env->GetArrayLength(after);
+    int beforeCodePoints[beforeLength];
+    int afterCodePoints[afterLength];
+    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
+    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
+    return AutocorrectionThresholdUtils::editDistance(beforeCodePoints, beforeLength,
+            afterCodePoints, afterLength);
+}
+
+static int latinime_BinaryDictionaryUtils_setCurrentTimeForTest(JNIEnv *env, jclass clazz,
+        jint currentTime) {
+    if (currentTime >= 0) {
+        TimeKeeper::startTestModeWithForceCurrentTime(currentTime);
+    } else {
+        TimeKeeper::stopTestMode();
+    }
+    TimeKeeper::setCurrentTime();
+    return TimeKeeper::peekCurrentTime();
+}
+
+static const JNINativeMethod sMethods[] = {
+    {
+        const_cast<char *>("createEmptyDictFileNative"),
+        const_cast<char *>(
+                "(Ljava/lang/String;JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)Z"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_createEmptyDictFile)
+    },
+    {
+        const_cast<char *>("calcNormalizedScoreNative"),
+        const_cast<char *>("([I[II)F"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_calcNormalizedScore)
+    },
+    {
+        const_cast<char *>("editDistanceNative"),
+        const_cast<char *>("([I[I)I"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_editDistance)
+    },
+    {
+        const_cast<char *>("setCurrentTimeForTestNative"),
+        const_cast<char *>("(I)I"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_setCurrentTimeForTest)
+    }
+};
+
+int register_BinaryDictionaryUtils(JNIEnv *env) {
+    const char *const kClassPathName = "com/android/inputmethod/latin/BinaryDictionary";
+    return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
+}
+} // namespace latinime