Fix UserHistoryBigram data contention in UserHistoryDictionary
Bug: 6637614 Change-Id: I34d26563e59d3b09bf35b8173dac5645ccb6a39f
This commit is contained in:
satok
The Android Automerger
parent
bead66d1d5
commit
703eb8bf96
1 changed files with 225 additions and 188 deletions
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@ -32,6 +32,7 @@ import com.android.inputmethod.latin.UserHistoryForgettingCurveUtils.ForgettingC
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import java.lang.ref.SoftReference;
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import java.util.HashMap;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.locks.ReentrantLock;
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/**
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* Locally gathers stats about the words user types and various other signals like auto-correction
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@ -40,6 +41,8 @@ import java.util.concurrent.ConcurrentHashMap;
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public class UserHistoryDictionary extends ExpandableDictionary {
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private static final String TAG = "UserHistoryDictionary";
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public static final boolean DBG_SAVE_RESTORE = false;
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public static final boolean DBG_STRESS_TEST = false;
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public static final boolean DBG_ALWAYS_WRITE = false;
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public static final boolean PROFILE_SAVE_RESTORE = LatinImeLogger.sDBG;
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/** Any pair being typed or picked */
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@ -82,7 +85,7 @@ public class UserHistoryDictionary extends ExpandableDictionary {
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private final UserHistoryDictionaryBigramList mBigramList =
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new UserHistoryDictionaryBigramList();
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private static volatile boolean sUpdatingDB = false;
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private final ReentrantLock mBigramListLock = new ReentrantLock();
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private final SharedPreferences mPrefs;
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private final static HashMap<String, String> sDictProjectionMap;
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@ -173,28 +176,38 @@ public class UserHistoryDictionary extends ExpandableDictionary {
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* The second word may not be null (a NullPointerException would be thrown).
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*/
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public int addToUserHistory(final String word1, String word2, boolean isValid) {
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super.addWord(word2, null /* the "shortcut" parameter is null */, FREQUENCY_FOR_TYPED);
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// Do not insert a word as a bigram of itself
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if (word2.equals(word1)) {
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return 0;
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if (mBigramListLock.tryLock()) {
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try {
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super.addWord(
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word2, null /* the "shortcut" parameter is null */, FREQUENCY_FOR_TYPED);
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// Do not insert a word as a bigram of itself
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if (word2.equals(word1)) {
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return 0;
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}
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final int freq;
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if (null == word1) {
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freq = FREQUENCY_FOR_TYPED;
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} else {
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freq = super.setBigramAndGetFrequency(
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word1, word2, new ForgettingCurveParams(isValid));
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}
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mBigramList.addBigram(word1, word2);
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return freq;
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} finally {
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mBigramListLock.unlock();
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}
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}
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final int freq;
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if (null == word1) {
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freq = FREQUENCY_FOR_TYPED;
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} else {
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freq = super.setBigramAndGetFrequency(word1, word2, new ForgettingCurveParams(isValid));
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}
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synchronized (mBigramList) {
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mBigramList.addBigram(word1, word2);
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}
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return freq;
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return -1;
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}
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public boolean cancelAddingUserHistory(String word1, String word2) {
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synchronized (mBigramList) {
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if (mBigramList.removeBigram(word1, word2)) {
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return super.removeBigram(word1, word2);
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if (mBigramListLock.tryLock()) {
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try {
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if (mBigramList.removeBigram(word1, word2)) {
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return super.removeBigram(word1, word2);
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}
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} finally {
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mBigramListLock.unlock();
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}
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}
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return false;
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@ -204,70 +217,73 @@ public class UserHistoryDictionary extends ExpandableDictionary {
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* Schedules a background thread to write any pending words to the database.
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*/
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private void flushPendingWrites() {
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synchronized (mBigramList) {
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// Nothing pending? Return
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if (mBigramList.isEmpty()) return;
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// Create a background thread to write the pending entries
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new UpdateDbTask(sOpenHelper, mBigramList, mLocale, this, mPrefs).execute();
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}
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}
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/** Used for testing purpose **/
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void waitUntilUpdateDBDone() {
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synchronized (mBigramList) {
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while (sUpdatingDB) {
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {
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}
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}
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if (mBigramListLock.isLocked()) {
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return;
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}
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// Create a background thread to write the pending entries
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new UpdateDbTask(sOpenHelper, mBigramList, mLocale, this, mPrefs).execute();
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}
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@Override
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public void loadDictionaryAsync() {
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synchronized(mBigramList) {
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final long last = SettingsValues.getLastUserHistoryWriteTime(mPrefs, mLocale);
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final boolean initializing = last == 0;
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final long now = System.currentTimeMillis();
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// Load the words that correspond to the current input locale
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final Cursor cursor = query(MAIN_COLUMN_LOCALE + "=?", new String[] { mLocale });
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if (null == cursor) return;
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// This must be run on non-main thread
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mBigramListLock.lock();
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try {
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loadDictionaryAsyncLocked();
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} finally {
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mBigramListLock.unlock();
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}
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}
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private void loadDictionaryAsyncLocked() {
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if (DBG_STRESS_TEST) {
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try {
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if (cursor.moveToFirst()) {
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final int word1Index = cursor.getColumnIndex(MAIN_COLUMN_WORD1);
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final int word2Index = cursor.getColumnIndex(MAIN_COLUMN_WORD2);
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final int fcIndex = cursor.getColumnIndex(COLUMN_FORGETTING_CURVE_VALUE);
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while (!cursor.isAfterLast()) {
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final String word1 = cursor.getString(word1Index);
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final String word2 = cursor.getString(word2Index);
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final int fc = cursor.getInt(fcIndex);
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "--- Load user history: " + word1 + ", " + word2 + ","
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+ mLocale + "," + this);
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}
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// Safeguard against adding really long words. Stack may overflow due
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// to recursive lookup
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if (null == word1) {
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super.addWord(word2, null /* shortcut */, fc);
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} else if (word1.length() < BinaryDictionary.MAX_WORD_LENGTH
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&& word2.length() < BinaryDictionary.MAX_WORD_LENGTH) {
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super.setBigramAndGetFrequency(
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word1, word2, initializing ? new ForgettingCurveParams(true)
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: new ForgettingCurveParams(fc, now, last));
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}
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mBigramList.addBigram(word1, word2, (byte)fc);
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cursor.moveToNext();
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Log.w(TAG, "Start stress in loading: " + mLocale);
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Thread.sleep(15000);
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Log.w(TAG, "End stress in loading");
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} catch (InterruptedException e) {
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}
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}
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final long last = SettingsValues.getLastUserHistoryWriteTime(mPrefs, mLocale);
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final boolean initializing = last == 0;
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final long now = System.currentTimeMillis();
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// Load the words that correspond to the current input locale
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final Cursor cursor = query(MAIN_COLUMN_LOCALE + "=?", new String[] { mLocale });
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if (null == cursor) return;
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try {
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// TODO: Call SQLiteDataBase.beginTransaction / SQLiteDataBase.endTransaction
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if (cursor.moveToFirst()) {
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final int word1Index = cursor.getColumnIndex(MAIN_COLUMN_WORD1);
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final int word2Index = cursor.getColumnIndex(MAIN_COLUMN_WORD2);
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final int fcIndex = cursor.getColumnIndex(COLUMN_FORGETTING_CURVE_VALUE);
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while (!cursor.isAfterLast()) {
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final String word1 = cursor.getString(word1Index);
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final String word2 = cursor.getString(word2Index);
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final int fc = cursor.getInt(fcIndex);
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "--- Load user history: " + word1 + ", " + word2 + ","
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+ mLocale + "," + this);
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}
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// Safeguard against adding really long words. Stack may overflow due
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// to recursive lookup
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if (null == word1) {
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super.addWord(word2, null /* shortcut */, fc);
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} else if (word1.length() < BinaryDictionary.MAX_WORD_LENGTH
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&& word2.length() < BinaryDictionary.MAX_WORD_LENGTH) {
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super.setBigramAndGetFrequency(
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word1, word2, initializing ? new ForgettingCurveParams(true)
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: new ForgettingCurveParams(fc, now, last));
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}
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mBigramList.addBigram(word1, word2, (byte)fc);
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cursor.moveToNext();
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}
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} finally {
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cursor.close();
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if (PROFILE_SAVE_RESTORE) {
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final long diff = System.currentTimeMillis() - now;
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Log.w(TAG, "PROF: Load User HistoryDictionary: "
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+ mLocale + ", " + diff + "ms.");
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}
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}
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} finally {
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cursor.close();
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if (PROFILE_SAVE_RESTORE) {
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final long diff = System.currentTimeMillis() - now;
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Log.w(TAG, "PROF: Load User HistoryDictionary: "
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+ mLocale + ", " + diff + "ms.");
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}
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}
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}
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@ -388,146 +404,167 @@ public class UserHistoryDictionary extends ExpandableDictionary {
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}
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@Override
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protected void onPreExecute() {
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sUpdatingDB = true;
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protected Void doInBackground(Void... v) {
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SQLiteDatabase db = null;
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if (mUserHistoryDictionary.mBigramListLock.tryLock()) {
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try {
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try {
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db = mDbHelper.getWritableDatabase();
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} catch (android.database.sqlite.SQLiteCantOpenDatabaseException e) {
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// If we can't open the db, don't do anything. Exit through the next test
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// for non-nullity of the db variable.
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}
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if (null == db) {
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// Not much we can do. Just exit.
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return null;
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}
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db.beginTransaction();
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return doLoadTaskLocked(db);
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} finally {
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if (db != null) {
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db.endTransaction();
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}
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mUserHistoryDictionary.mBigramListLock.unlock();
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}
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}
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return null;
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}
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@Override
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protected Void doInBackground(Void... v) {
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synchronized(mBigramList) {
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final long now = PROFILE_SAVE_RESTORE ? System.currentTimeMillis() : 0;
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int profTotal = 0;
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int profInsert = 0;
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int profDelete = 0;
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SQLiteDatabase db = null;
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private Void doLoadTaskLocked(SQLiteDatabase db) {
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if (DBG_STRESS_TEST) {
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try {
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db = mDbHelper.getWritableDatabase();
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} catch (android.database.sqlite.SQLiteCantOpenDatabaseException e) {
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// If we can't open the db, don't do anything. Exit through the next test
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// for non-nullity of the db variable.
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Log.w(TAG, "Start stress in closing: " + mLocale);
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Thread.sleep(15000);
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Log.w(TAG, "End stress in closing");
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} catch (InterruptedException e) {
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}
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if (null == db) {
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// Not much we can do. Just exit.
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sUpdatingDB = false;
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return null;
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}
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db.execSQL("PRAGMA foreign_keys = ON;");
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final boolean addLevel0Bigram = mBigramList.size() <= sMaxHistoryBigrams;
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}
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final long now = PROFILE_SAVE_RESTORE ? System.currentTimeMillis() : 0;
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int profTotal = 0;
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int profInsert = 0;
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int profDelete = 0;
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db.execSQL("PRAGMA foreign_keys = ON;");
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final boolean addLevel0Bigram = mBigramList.size() <= sMaxHistoryBigrams;
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// Write all the entries to the db
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for (String word1 : mBigramList.keySet()) {
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final HashMap<String, Byte> word1Bigrams = mBigramList.getBigrams(word1);
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for (String word2 : word1Bigrams.keySet()) {
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if (PROFILE_SAVE_RESTORE) {
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++profTotal;
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// Write all the entries to the db
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for (String word1 : mBigramList.keySet()) {
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final HashMap<String, Byte> word1Bigrams = mBigramList.getBigrams(word1);
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for (String word2 : word1Bigrams.keySet()) {
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if (PROFILE_SAVE_RESTORE) {
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++profTotal;
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}
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// Get new frequency. Do not insert unigrams/bigrams which freq is "-1".
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final int freq; // -1, or 0~255
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if (word1 == null) { // unigram
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freq = FREQUENCY_FOR_TYPED;
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final byte prevFc = word1Bigrams.get(word2);
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if (prevFc == FREQUENCY_FOR_TYPED) {
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// No need to update since we found no changes for this entry.
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// Just skip to the next entry.
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "Skip update user history: " + word1 + "," + word2
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+ "," + prevFc);
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}
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if (!DBG_ALWAYS_WRITE) {
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continue;
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}
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}
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// Get new frequency. Do not insert unigrams/bigrams which freq is "-1".
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final int freq; // -1, or 0~255
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if (word1 == null) { // unigram
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freq = FREQUENCY_FOR_TYPED;
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} else { // bigram
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final NextWord nw = mUserHistoryDictionary.getBigramWord(word1, word2);
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if (nw != null) {
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final ForgettingCurveParams fcp = nw.getFcParams();
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final byte prevFc = word1Bigrams.get(word2);
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if (prevFc == FREQUENCY_FOR_TYPED) {
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final byte fc = (byte)fcp.getFc();
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final boolean isValid = fcp.isValid();
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if (prevFc > 0 && prevFc == fc) {
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// No need to update since we found no changes for this entry.
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// Just skip to the next entry.
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "Skip update user history: " + word1 + "," + word2
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+ "," + prevFc);
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Log.d(TAG, "Skip update user history: " + word1 + ","
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+ word2 + "," + prevFc);
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}
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continue;
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}
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} else { // bigram
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final NextWord nw = mUserHistoryDictionary.getBigramWord(word1, word2);
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if (nw != null) {
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final ForgettingCurveParams fcp = nw.getFcParams();
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final byte prevFc = word1Bigrams.get(word2);
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final byte fc = (byte)fcp.getFc();
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final boolean isValid = fcp.isValid();
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if (prevFc > 0 && prevFc == fc) {
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// No need to update since we found no changes for this entry.
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// Just skip to the next entry.
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "Skip update user history: " + word1 + ","
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+ word2 + "," + prevFc);
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}
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if (!DBG_ALWAYS_WRITE) {
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continue;
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} else if (UserHistoryForgettingCurveUtils.
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needsToSave(fc, isValid, addLevel0Bigram)) {
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freq = fc;
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} else {
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freq = -1;
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freq = fc;
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}
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} else if (UserHistoryForgettingCurveUtils.
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needsToSave(fc, isValid, addLevel0Bigram)) {
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freq = fc;
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} else {
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freq = -1;
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}
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} else {
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freq = -1;
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}
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}
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// TODO: this process of making a text search for each pair each time
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// is terribly inefficient. Optimize this.
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// Find pair id
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Cursor c = null;
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try {
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if (null != word1) {
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c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
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MAIN_COLUMN_WORD1 + "=? AND " + MAIN_COLUMN_WORD2 + "=? AND "
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+ MAIN_COLUMN_LOCALE + "=?",
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new String[] { word1, word2, mLocale }, null, null,
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null);
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} else {
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c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
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MAIN_COLUMN_WORD1 + " IS NULL AND " + MAIN_COLUMN_WORD2
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+ "=? AND " + MAIN_COLUMN_LOCALE + "=?",
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new String[] { word2, mLocale }, null, null, null);
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}
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// TODO: this process of making a text search for each pair each time
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// is terribly inefficient. Optimize this.
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// Find pair id
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Cursor c = null;
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try {
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if (null != word1) {
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c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
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MAIN_COLUMN_WORD1 + "=? AND " + MAIN_COLUMN_WORD2 + "=? AND "
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+ MAIN_COLUMN_LOCALE + "=?",
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new String[] { word1, word2, mLocale }, null, null,
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null);
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} else {
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c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
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MAIN_COLUMN_WORD1 + " IS NULL AND " + MAIN_COLUMN_WORD2
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+ "=? AND " + MAIN_COLUMN_LOCALE + "=?",
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new String[] { word2, mLocale }, null, null, null);
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}
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final int pairId;
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if (c.moveToFirst()) {
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if (PROFILE_SAVE_RESTORE) {
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++profDelete;
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}
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// Delete existing pair
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pairId = c.getInt(c.getColumnIndex(MAIN_COLUMN_ID));
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db.delete(FREQ_TABLE_NAME, FREQ_COLUMN_PAIR_ID + "=?",
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new String[] { Integer.toString(pairId) });
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} else {
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// Create new pair
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Long pairIdLong = db.insert(MAIN_TABLE_NAME, null,
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getContentValues(word1, word2, mLocale));
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pairId = pairIdLong.intValue();
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final int pairId;
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if (c.moveToFirst()) {
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if (PROFILE_SAVE_RESTORE) {
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++profDelete;
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}
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if (freq > 0) {
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if (PROFILE_SAVE_RESTORE) {
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++profInsert;
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}
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if (DBG_SAVE_RESTORE) {
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Log.d(TAG, "--- Save user history: " + word1 + ", " + word2
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+ mLocale + "," + this);
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}
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// Insert new frequency
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||||
db.insert(FREQ_TABLE_NAME, null,
|
||||
getFrequencyContentValues(pairId, freq));
|
||||
// Update an existing bigram entry in mBigramList too in order to
|
||||
// synchronize the SQL DB and mBigramList.
|
||||
mBigramList.updateBigram(word1, word2, (byte)freq);
|
||||
// Delete existing pair
|
||||
pairId = c.getInt(c.getColumnIndex(MAIN_COLUMN_ID));
|
||||
db.delete(FREQ_TABLE_NAME, FREQ_COLUMN_PAIR_ID + "=?",
|
||||
new String[] { Integer.toString(pairId) });
|
||||
} else {
|
||||
// Create new pair
|
||||
Long pairIdLong = db.insert(MAIN_TABLE_NAME, null,
|
||||
getContentValues(word1, word2, mLocale));
|
||||
pairId = pairIdLong.intValue();
|
||||
}
|
||||
if (freq > 0) {
|
||||
if (PROFILE_SAVE_RESTORE) {
|
||||
++profInsert;
|
||||
}
|
||||
} finally {
|
||||
if (c != null) {
|
||||
c.close();
|
||||
if (DBG_SAVE_RESTORE) {
|
||||
Log.d(TAG, "--- Save user history: " + word1 + ", " + word2
|
||||
+ mLocale + "," + this);
|
||||
}
|
||||
// Insert new frequency
|
||||
db.insert(FREQ_TABLE_NAME, null,
|
||||
getFrequencyContentValues(pairId, freq));
|
||||
// Update an existing bigram entry in mBigramList too in order to
|
||||
// synchronize the SQL DB and mBigramList.
|
||||
mBigramList.updateBigram(word1, word2, (byte)freq);
|
||||
}
|
||||
} finally {
|
||||
if (c != null) {
|
||||
c.close();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
checkPruneData(db);
|
||||
// Save the timestamp after we finish writing the SQL DB.
|
||||
SettingsValues.setLastUserHistoryWriteTime(mPrefs, mLocale);
|
||||
sUpdatingDB = false;
|
||||
if (PROFILE_SAVE_RESTORE) {
|
||||
final long diff = System.currentTimeMillis() - now;
|
||||
Log.w(TAG, "PROF: Write User HistoryDictionary: " + mLocale + ", "+ diff
|
||||
+ "ms. Total: " + profTotal + ". Insert: " + profInsert + ". Delete: "
|
||||
+ profDelete);
|
||||
}
|
||||
return null;
|
||||
} // synchronized
|
||||
checkPruneData(db);
|
||||
// Save the timestamp after we finish writing the SQL DB.
|
||||
SettingsValues.setLastUserHistoryWriteTime(mPrefs, mLocale);
|
||||
if (PROFILE_SAVE_RESTORE) {
|
||||
final long diff = System.currentTimeMillis() - now;
|
||||
Log.w(TAG, "PROF: Write User HistoryDictionary: " + mLocale + ", "+ diff
|
||||
+ "ms. Total: " + profTotal + ". Insert: " + profInsert + ". Delete: "
|
||||
+ profDelete);
|
||||
}
|
||||
db.setTransactionSuccessful();
|
||||
return null;
|
||||
}
|
||||
|
||||
private static ContentValues getContentValues(String word1, String word2, String locale) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue