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      1 /*
      2  * Copyright (C) 2012 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: Session"
     18 
     19 #include "com_android_inputmethod_latin_DicTraverseSession.h"
     20 
     21 #include "defines.h"
     22 #include "dictionary/property/ngram_context.h"
     23 #include "jni.h"
     24 #include "jni_common.h"
     25 #include "suggest/core/session/dic_traverse_session.h"
     26 
     27 namespace latinime {
     28 class Dictionary;
     29 static jlong latinime_setDicTraverseSession(JNIEnv *env, jclass clazz, jstring localeJStr,
     30         jlong dictSize) {
     31     void *traverseSession = DicTraverseSession::getSessionInstance(env, localeJStr, dictSize);
     32     return reinterpret_cast<jlong>(traverseSession);
     33 }
     34 
     35 static void latinime_initDicTraverseSession(JNIEnv *env, jclass clazz, jlong traverseSession,
     36         jlong dictionary, jintArray previousWord, jint previousWordLength) {
     37     DicTraverseSession *ts = reinterpret_cast<DicTraverseSession *>(traverseSession);
     38     if (!ts) {
     39         return;
     40     }
     41     Dictionary *dict = reinterpret_cast<Dictionary *>(dictionary);
     42     if (!previousWord) {
     43         NgramContext emptyNgramContext;
     44         ts->init(dict, &emptyNgramContext, 0 /* suggestOptions */);
     45         return;
     46     }
     47     int prevWord[previousWordLength];
     48     env->GetIntArrayRegion(previousWord, 0, previousWordLength, prevWord);
     49     NgramContext ngramContext(prevWord, previousWordLength, false /* isStartOfSentence */);
     50     ts->init(dict, &ngramContext, 0 /* suggestOptions */);
     51 }
     52 
     53 static void latinime_releaseDicTraverseSession(JNIEnv *env, jclass clazz, jlong traverseSession) {
     54     DicTraverseSession *ts = reinterpret_cast<DicTraverseSession *>(traverseSession);
     55     DicTraverseSession::releaseSessionInstance(ts);
     56 }
     57 
     58 static const JNINativeMethod sMethods[] = {
     59     {
     60         const_cast<char *>("setDicTraverseSessionNative"),
     61         const_cast<char *>("(Ljava/lang/String;J)J"),
     62         reinterpret_cast<void *>(latinime_setDicTraverseSession)
     63     },
     64     {
     65         const_cast<char *>("initDicTraverseSessionNative"),
     66         const_cast<char *>("(JJ[II)V"),
     67         reinterpret_cast<void *>(latinime_initDicTraverseSession)
     68     },
     69     {
     70         const_cast<char *>("releaseDicTraverseSessionNative"),
     71         const_cast<char *>("(J)V"),
     72         reinterpret_cast<void *>(latinime_releaseDicTraverseSession)
     73     }
     74 };
     75 
     76 int register_DicTraverseSession(JNIEnv *env) {
     77     const char *const kClassPathName = "com/android/inputmethod/latin/DicTraverseSession";
     78     return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
     79 }
     80 } // namespace latinime
     81