DicTraverseSession.java revision 03eb9de961d655d6a3c2c83082221166db10f93c 
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
17package com.android.inputmethod.latin;
18
19import com.android.inputmethod.latin.common.Constants;
20import com.android.inputmethod.latin.common.NativeSuggestOptions;
21import com.android.inputmethod.latin.settings.AdditionalFeaturesSettingUtils;
22import com.android.inputmethod.latin.utils.JniUtils;
23
24import java.util.Locale;
25
26public final class DicTraverseSession {
27    static {
28        JniUtils.loadNativeLibrary();
29    }
30    // Must be equal to MAX_RESULTS in native/jni/src/defines.h
31    private static final int MAX_RESULTS = 18;
32    public final int[] mInputCodePoints = new int[Constants.DICTIONARY_MAX_WORD_LENGTH];
33    public final int[][] mPrevWordCodePointArrays =
34            new int[Constants.MAX_PREV_WORD_COUNT_FOR_N_GRAM][];
35    public final boolean[] mIsBeginningOfSentenceArray =
36            new boolean[Constants.MAX_PREV_WORD_COUNT_FOR_N_GRAM];
37    public final int[] mOutputSuggestionCount = new int[1];
38    public final int[] mOutputCodePoints =
39            new int[Constants.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            AdditionalFeaturesSettingUtils.ADDITIONAL_FEATURES_SETTINGS_SIZE);
49
50    private static native long setDicTraverseSessionNative(String locale, long dictSize);
51    private static native void initDicTraverseSessionNative(long nativeDicTraverseSession,
52            long dictionary, int[] previousWord, int previousWordLength);
53    private static native void releaseDicTraverseSessionNative(long nativeDicTraverseSession);
54
55    private long mNativeDicTraverseSession;
56
57    public DicTraverseSession(Locale locale, long dictionary, long dictSize) {
58        mNativeDicTraverseSession = createNativeDicTraverseSession(
59                locale != null ? locale.toString() : "", dictSize);
60        initSession(dictionary);
61    }
62
63    public long getSession() {
64        return mNativeDicTraverseSession;
65    }
66
67    public void initSession(long dictionary) {
68        initSession(dictionary, null, 0);
69    }
70
71    public void initSession(long dictionary, int[] previousWord, int previousWordLength) {
72        initDicTraverseSessionNative(
73                mNativeDicTraverseSession, dictionary, previousWord, previousWordLength);
74    }
75
76    private static long createNativeDicTraverseSession(String locale, long dictSize) {
77        return setDicTraverseSessionNative(locale, dictSize);
78    }
79
80    private void closeInternal() {
81        if (mNativeDicTraverseSession != 0) {
82            releaseDicTraverseSessionNative(mNativeDicTraverseSession);
83            mNativeDicTraverseSession = 0;
84        }
85    }
86
87    public void close() {
88        closeInternal();
89    }
90
91    @Override
92    protected void finalize() throws Throwable {
93        try {
94            closeInternal();
95        } finally {
96            super.finalize();
97        }
98    }
99}
100