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 package com.android.inputmethod.latin;
18 
19 import com.android.inputmethod.latin.common.NativeSuggestOptions;
20 import com.android.inputmethod.latin.define.DecoderSpecificConstants;
21 import com.android.inputmethod.latin.utils.JniUtils;
22 
23 import java.util.Locale;
24 
25 public final class DicTraverseSession {
26     static {
JniUtils.loadNativeLibrary()27         JniUtils.loadNativeLibrary();
28     }
29     // Must be equal to MAX_RESULTS in native/jni/src/defines.h
30     private static final int MAX_RESULTS = 18;
31     public final int[] mInputCodePoints =
32             new int[DecoderSpecificConstants.DICTIONARY_MAX_WORD_LENGTH];
33     public final int[][] mPrevWordCodePointArrays =
34             new int[DecoderSpecificConstants.MAX_PREV_WORD_COUNT_FOR_N_GRAM][];
35     public final boolean[] mIsBeginningOfSentenceArray =
36             new boolean[DecoderSpecificConstants.MAX_PREV_WORD_COUNT_FOR_N_GRAM];
37     public final int[] mOutputSuggestionCount = new int[1];
38     public final int[] mOutputCodePoints =
39             new int[DecoderSpecificConstants.DICTIONARY_MAX_WORD_LENGTH * MAX_RESULTS];
40     public final int[] mSpaceIndices = new int[MAX_RESULTS];
41     public final int[] mOutputScores = new int[MAX_RESULTS];
42     public final int[] mOutputTypes = new int[MAX_RESULTS];
43     // Only one result is ever used
44     public final int[] mOutputAutoCommitFirstWordConfidence = new int[1];
45     public final float[] mInputOutputWeightOfLangModelVsSpatialModel = new float[1];
46 
47     public final NativeSuggestOptions mNativeSuggestOptions = new NativeSuggestOptions();
48 
setDicTraverseSessionNative(String locale, long dictSize)49     private static native long setDicTraverseSessionNative(String locale, long dictSize);
initDicTraverseSessionNative(long nativeDicTraverseSession, long dictionary, int[] previousWord, int previousWordLength)50     private static native void initDicTraverseSessionNative(long nativeDicTraverseSession,
51             long dictionary, int[] previousWord, int previousWordLength);
releaseDicTraverseSessionNative(long nativeDicTraverseSession)52     private static native void releaseDicTraverseSessionNative(long nativeDicTraverseSession);
53 
54     private long mNativeDicTraverseSession;
55 
DicTraverseSession(Locale locale, long dictionary, long dictSize)56     public DicTraverseSession(Locale locale, long dictionary, long dictSize) {
57         mNativeDicTraverseSession = createNativeDicTraverseSession(
58                 locale != null ? locale.toString() : "", dictSize);
59         initSession(dictionary);
60     }
61 
getSession()62     public long getSession() {
63         return mNativeDicTraverseSession;
64     }
65 
initSession(long dictionary)66     public void initSession(long dictionary) {
67         initSession(dictionary, null, 0);
68     }
69 
initSession(long dictionary, int[] previousWord, int previousWordLength)70     public void initSession(long dictionary, int[] previousWord, int previousWordLength) {
71         initDicTraverseSessionNative(
72                 mNativeDicTraverseSession, dictionary, previousWord, previousWordLength);
73     }
74 
createNativeDicTraverseSession(String locale, long dictSize)75     private static long createNativeDicTraverseSession(String locale, long dictSize) {
76         return setDicTraverseSessionNative(locale, dictSize);
77     }
78 
closeInternal()79     private void closeInternal() {
80         if (mNativeDicTraverseSession != 0) {
81             releaseDicTraverseSessionNative(mNativeDicTraverseSession);
82             mNativeDicTraverseSession = 0;
83         }
84     }
85 
close()86     public void close() {
87         closeInternal();
88     }
89 
90     @Override
finalize()91     protected void finalize() throws Throwable {
92         try {
93             closeInternal();
94         } finally {
95             super.finalize();
96         }
97     }
98 }
99