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am 84d858ed: Use BinaryDictInputOutput to save UserHistoryDictionary.

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* commit '84d858ed5e187eb9d4b56b593e1d9287f762bbca':
  Use BinaryDictInputOutput to save UserHistoryDictionary.
This commit is contained in:
Yuichiro Hanada 2012-09-26 20:17:22 -07:00 committed by Android Git Automerger
commit 6c2d7cde0a
4 changed files with 271 additions and 355 deletions
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28
java/src/com/android/inputmethod/latin/UserHistoryDictIOUtils.java
View file

@ -115,11 +115,10 @@ public class UserHistoryDictIOUtils {
public static void writeDictionaryBinary(final OutputStream destination,
final BigramDictionaryInterface dict, final UserHistoryDictionaryBigramList bigrams,
final FormatOptions formatOptions) {
final FusionDictionary fusionDict = constructFusionDictionary(dict, bigrams);
try {
BinaryDictInputOutput.writeDictionaryBinary(destination, fusionDict, formatOptions);
Log.d(TAG, "end writing");
} catch (IOException e) {
Log.e(TAG, "IO exception while writing file: " + e);
} catch (UnsupportedFormatException e) {
@ -132,16 +131,18 @@ public class UserHistoryDictIOUtils {
*/
/* packages for test */ static FusionDictionary constructFusionDictionary(
final BigramDictionaryInterface dict, final UserHistoryDictionaryBigramList bigrams) {
final FusionDictionary fusionDict = new FusionDictionary(new Node(),
new FusionDictionary.DictionaryOptions(
new HashMap<String,String>(), false, false));
new FusionDictionary.DictionaryOptions(new HashMap<String, String>(), false,
false));
int profTotal = 0;
for (final String word1 : bigrams.keySet()) {
final HashMap<String, Byte> word1Bigrams = bigrams.getBigrams(word1);
for (final String word2 : word1Bigrams.keySet()) {
final int freq = dict.getFrequency(word1, word2);
if (freq == -1) {
// don't add this bigram.
continue;
}
if (DEBUG) {
if (word1 == null) {
Log.d(TAG, "add unigram: " + word2 + "," + Integer.toString(freq));
@ -149,17 +150,22 @@ public class UserHistoryDictIOUtils {
Log.d(TAG, "add bigram: " + word1
+ "," + word2 + "," + Integer.toString(freq));
}
profTotal++;
}
if (word1 == null) { // unigram
fusionDict.add(word2, freq, null, false /* isNotAWord */);
} else { // bigram
if (FusionDictionary.findWordInTree(fusionDict.mRoot, word1) == null) {
fusionDict.add(word1, 2, null, false /* isNotAWord */);
}
fusionDict.setBigram(word1, word2, freq);
}
bigrams.updateBigram(word1, word2, (byte)freq);
}
}
if (DEBUG) {
Log.d(TAG, "add " + profTotal + "words");
}
return fusionDict;
}
@ -171,7 +177,6 @@ public class UserHistoryDictIOUtils {
final Map<Integer, String> unigrams = CollectionUtils.newTreeMap();
final Map<Integer, Integer> frequencies = CollectionUtils.newTreeMap();
final Map<Integer, ArrayList<PendingAttribute>> bigrams = CollectionUtils.newTreeMap();
try {
BinaryDictIOUtils.readUnigramsAndBigramsBinary(buffer, unigrams, frequencies,
bigrams);
@ -189,14 +194,11 @@ public class UserHistoryDictIOUtils {
/* package for test */ static void addWordsFromWordMap(final Map<Integer, String> unigrams,
final Map<Integer, Integer> frequencies,
final Map<Integer, ArrayList<PendingAttribute>> bigrams, final OnAddWordListener to) {
for (Map.Entry<Integer, String> entry : unigrams.entrySet()) {
final String word1 = entry.getValue();
final int unigramFrequency = frequencies.get(entry.getKey());
to.setUnigram(word1, null, unigramFrequency);
final ArrayList<PendingAttribute> attrList = bigrams.get(entry.getKey());
if (attrList != null) {
for (final PendingAttribute attr : attrList) {
to.setBigram(word1, unigrams.get(attr.mAddress),

484
java/src/com/android/inputmethod/latin/UserHistoryDictionary.java
View file

@ -16,24 +16,25 @@
package com.android.inputmethod.latin;
import android.content.ContentValues;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.os.AsyncTask;
import android.provider.BaseColumns;
import android.util.Log;
import com.android.inputmethod.keyboard.ProximityInfo;
import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
import com.android.inputmethod.latin.UserHistoryDictIOUtils.BigramDictionaryInterface;
import com.android.inputmethod.latin.UserHistoryDictIOUtils.OnAddWordListener;
import com.android.inputmethod.latin.UserHistoryForgettingCurveUtils.ForgettingCurveParams;
import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.ref.SoftReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReentrantLock;
@ -43,45 +44,27 @@ import java.util.concurrent.locks.ReentrantLock;
*/
public class UserHistoryDictionary extends ExpandableDictionary {
private static final String TAG = UserHistoryDictionary.class.getSimpleName();
private static final String NAME = UserHistoryDictionary.class.getSimpleName();
public static final boolean DBG_SAVE_RESTORE = false;
public static final boolean DBG_STRESS_TEST = false;
public static final boolean DBG_ALWAYS_WRITE = false;
public static final boolean PROFILE_SAVE_RESTORE = LatinImeLogger.sDBG;
private static final FormatOptions VERSION3 = new FormatOptions(3,
true /* supportsDynamicUpdate */);
/** Any pair being typed or picked */
private static final int FREQUENCY_FOR_TYPED = 2;
/** Maximum number of pairs. Pruning will start when databases goes above this number. */
public static final int sMaxHistoryBigrams = 10000;
public static final int MAX_HISTORY_BIGRAMS = 10000;
/**
* When it hits maximum bigram pair, it will delete until you are left with
* only (sMaxHistoryBigrams - sDeleteHistoryBigrams) pairs.
* Do not keep this number small to avoid deleting too often.
*/
public static final int sDeleteHistoryBigrams = 1000;
/**
* Database version should increase if the database structure changes
*/
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "userbigram_dict.db";
/** Name of the words table in the database */
private static final String MAIN_TABLE_NAME = "main";
// TODO: Consume less space by using a unique id for locale instead of the whole
// 2-5 character string.
private static final String MAIN_COLUMN_ID = BaseColumns._ID;
private static final String MAIN_COLUMN_WORD1 = "word1";
private static final String MAIN_COLUMN_WORD2 = "word2";
private static final String MAIN_COLUMN_LOCALE = "locale";
/** Name of the frequency table in the database */
private static final String FREQ_TABLE_NAME = "frequency";
private static final String FREQ_COLUMN_ID = BaseColumns._ID;
private static final String FREQ_COLUMN_PAIR_ID = "pair_id";
private static final String COLUMN_FORGETTING_CURVE_VALUE = "freq";
public static final int DELETE_HISTORY_BIGRAMS = 1000;
/** Locale for which this user history dictionary is storing words */
private final String mLocale;
@ -91,29 +74,13 @@ public class UserHistoryDictionary extends ExpandableDictionary {
private final ReentrantLock mBigramListLock = new ReentrantLock();
private final SharedPreferences mPrefs;
private final static HashMap<String, String> sDictProjectionMap;
private final static ConcurrentHashMap<String, SoftReference<UserHistoryDictionary>>
// Should always be false except when we use this class for test
/* package for test */ boolean isTest = false;
private static final ConcurrentHashMap<String, SoftReference<UserHistoryDictionary>>
sLangDictCache = CollectionUtils.newConcurrentHashMap();
static {
sDictProjectionMap = CollectionUtils.newHashMap();
sDictProjectionMap.put(MAIN_COLUMN_ID, MAIN_COLUMN_ID);
sDictProjectionMap.put(MAIN_COLUMN_WORD1, MAIN_COLUMN_WORD1);
sDictProjectionMap.put(MAIN_COLUMN_WORD2, MAIN_COLUMN_WORD2);
sDictProjectionMap.put(MAIN_COLUMN_LOCALE, MAIN_COLUMN_LOCALE);
sDictProjectionMap.put(FREQ_COLUMN_ID, FREQ_COLUMN_ID);
sDictProjectionMap.put(FREQ_COLUMN_PAIR_ID, FREQ_COLUMN_PAIR_ID);
sDictProjectionMap.put(COLUMN_FORGETTING_CURVE_VALUE, COLUMN_FORGETTING_CURVE_VALUE);
}
private static DatabaseHelper sOpenHelper = null;
public String getLocale() {
return mLocale;
}
public synchronized static UserHistoryDictionary getInstance(
public static synchronized UserHistoryDictionary getInstance(
final Context context, final String locale, final SharedPreferences sp) {
if (sLangDictCache.containsKey(locale)) {
final SoftReference<UserHistoryDictionary> ref = sLangDictCache.get(locale);
@ -136,9 +103,6 @@ public class UserHistoryDictionary extends ExpandableDictionary {
super(context, Dictionary.TYPE_USER_HISTORY);
mLocale = locale;
mPrefs = sp;
if (sOpenHelper == null) {
sOpenHelper = new DatabaseHelper(getContext());
}
if (mLocale != null && mLocale.length() > 1) {
loadDictionary();
}
@ -190,6 +154,7 @@ public class UserHistoryDictionary extends ExpandableDictionary {
try {
super.addWord(
word2, null /* the "shortcut" parameter is null */, FREQUENCY_FOR_TYPED);
mBigramList.addBigram(null, word2, (byte)FREQUENCY_FOR_TYPED);
// Do not insert a word as a bigram of itself
if (word2.equals(word1)) {
return 0;
@ -227,11 +192,8 @@ public class UserHistoryDictionary extends ExpandableDictionary {
* Schedules a background thread to write any pending words to the database.
*/
private void flushPendingWrites() {
if (mBigramListLock.isLocked()) {
return;
}
// Create a background thread to write the pending entries
new UpdateDbTask(sOpenHelper, mBigramList, mLocale, this, mPrefs).execute();
new UpdateBinaryTask(mBigramList, mLocale, this, mPrefs, getContext()).execute();
}
@Override
@ -245,6 +207,8 @@ public class UserHistoryDictionary extends ExpandableDictionary {
}
}
private int profTotal;
private void loadDictionaryAsyncLocked() {
if (DBG_STRESS_TEST) {
try {
@ -257,343 +221,181 @@ public class UserHistoryDictionary extends ExpandableDictionary {
final long last = SettingsValues.getLastUserHistoryWriteTime(mPrefs, mLocale);
final boolean initializing = last == 0;
final long now = System.currentTimeMillis();
// Load the words that correspond to the current input locale
final Cursor cursor = query(MAIN_COLUMN_LOCALE + "=?", new String[] { mLocale });
if (null == cursor) return;
try {
// TODO: Call SQLiteDataBase.beginTransaction / SQLiteDataBase.endTransaction
if (cursor.moveToFirst()) {
final int word1Index = cursor.getColumnIndex(MAIN_COLUMN_WORD1);
final int word2Index = cursor.getColumnIndex(MAIN_COLUMN_WORD2);
final int fcIndex = cursor.getColumnIndex(COLUMN_FORGETTING_CURVE_VALUE);
while (!cursor.isAfterLast()) {
final String word1 = cursor.getString(word1Index);
final String word2 = cursor.getString(word2Index);
final int fc = cursor.getInt(fcIndex);
profTotal = 0;
final String fileName = NAME + "." + mLocale + ".dict";
final ExpandableDictionary dictionary = this;
final OnAddWordListener listener = new OnAddWordListener() {
@Override
public void setUnigram(String word, String shortcutTarget, int frequency) {
profTotal++;
if (DBG_SAVE_RESTORE) {
Log.d(TAG, "load unigram: " + word + "," + frequency);
}
dictionary.addWord(word, shortcutTarget, frequency);
mBigramList.addBigram(null, word, (byte)frequency);
}
@Override
public void setBigram(String word1, String word2, int frequency) {
if (word1.length() < BinaryDictionary.MAX_WORD_LENGTH
&& word2.length() < BinaryDictionary.MAX_WORD_LENGTH) {
profTotal++;
if (DBG_SAVE_RESTORE) {
Log.d(TAG, "--- Load user history: " + word1 + ", " + word2 + ","
+ mLocale + "," + this);
Log.d(TAG, "load bigram: " + word1 + "," + word2 + "," + frequency);
}
// Safeguard against adding really long words. Stack may overflow due
// to recursive lookup
if (null == word1) {
super.addWord(word2, null /* shortcut */, fc);
} else if (word1.length() < BinaryDictionary.MAX_WORD_LENGTH
&& word2.length() < BinaryDictionary.MAX_WORD_LENGTH) {
super.setBigramAndGetFrequency(
word1, word2, initializing ? new ForgettingCurveParams(true)
: new ForgettingCurveParams(fc, now, last));
}
mBigramList.addBigram(word1, word2, (byte)fc);
cursor.moveToNext();
dictionary.setBigramAndGetFrequency(
word1, word2, initializing ? new ForgettingCurveParams(true)
: new ForgettingCurveParams(frequency, now, last));
}
mBigramList.addBigram(word1, word2, (byte)frequency);
}
};
// Load the dictionary from binary file
FileInputStream inStream = null;
try {
final File file = new File(getContext().getFilesDir(), fileName);
final byte[] buffer = new byte[(int)file.length()];
inStream = new FileInputStream(file);
inStream.read(buffer);
UserHistoryDictIOUtils.readDictionaryBinary(
new UserHistoryDictIOUtils.ByteArrayWrapper(buffer), listener);
} catch (FileNotFoundException e) {
Log.e(TAG, "when loading: file not found" + e);
} catch (IOException e) {
Log.e(TAG, "IOException when open bytebuffer: " + e);
} finally {
if (inStream != null) {
try {
inStream.close();
} catch (IOException e) {
// do nothing
}
}
} finally {
cursor.close();
if (PROFILE_SAVE_RESTORE) {
final long diff = System.currentTimeMillis() - now;
Log.w(TAG, "PROF: Load User HistoryDictionary: "
+ mLocale + ", " + diff + "ms.");
Log.d(TAG, "PROF: Load UserHistoryDictionary: "
+ mLocale + ", " + diff + "ms. load " + profTotal + "entries.");
}
}
}
/**
* Query the database
* Async task to write pending words to the binarydicts.
*/
private static Cursor query(String selection, String[] selectionArgs) {
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
// main INNER JOIN frequency ON (main._id=freq.pair_id)
qb.setTables(MAIN_TABLE_NAME + " INNER JOIN " + FREQ_TABLE_NAME + " ON ("
+ MAIN_TABLE_NAME + "." + MAIN_COLUMN_ID + "=" + FREQ_TABLE_NAME + "."
+ FREQ_COLUMN_PAIR_ID +")");
qb.setProjectionMap(sDictProjectionMap);
// Get the database and run the query
try {
SQLiteDatabase db = sOpenHelper.getReadableDatabase();
Cursor c = qb.query(db,
new String[] {
MAIN_COLUMN_WORD1, MAIN_COLUMN_WORD2, COLUMN_FORGETTING_CURVE_VALUE },
selection, selectionArgs, null, null, null);
return c;
} catch (android.database.sqlite.SQLiteCantOpenDatabaseException e) {
// Can't open the database : presumably we can't access storage. That may happen
// when the device is wedged; do a best effort to still start the keyboard.
return null;
}
}
/**
* This class helps open, create, and upgrade the database file.
*/
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("PRAGMA foreign_keys = ON;");
db.execSQL("CREATE TABLE " + MAIN_TABLE_NAME + " ("
+ MAIN_COLUMN_ID + " INTEGER PRIMARY KEY,"
+ MAIN_COLUMN_WORD1 + " TEXT,"
+ MAIN_COLUMN_WORD2 + " TEXT,"
+ MAIN_COLUMN_LOCALE + " TEXT"
+ ");");
db.execSQL("CREATE TABLE " + FREQ_TABLE_NAME + " ("
+ FREQ_COLUMN_ID + " INTEGER PRIMARY KEY,"
+ FREQ_COLUMN_PAIR_ID + " INTEGER,"
+ COLUMN_FORGETTING_CURVE_VALUE + " INTEGER,"
+ "FOREIGN KEY(" + FREQ_COLUMN_PAIR_ID + ") REFERENCES " + MAIN_TABLE_NAME
+ "(" + MAIN_COLUMN_ID + ")" + " ON DELETE CASCADE"
+ ");");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + MAIN_TABLE_NAME);
db.execSQL("DROP TABLE IF EXISTS " + FREQ_TABLE_NAME);
onCreate(db);
}
}
/**
* Async task to write pending words to the database so that it stays in sync with
* the in-memory trie.
*/
private static class UpdateDbTask extends AsyncTask<Void, Void, Void> {
private static class UpdateBinaryTask extends AsyncTask<Void, Void, Void>
implements BigramDictionaryInterface {
private final UserHistoryDictionaryBigramList mBigramList;
private final DatabaseHelper mDbHelper;
private final boolean mAddLevel0Bigrams;
private final String mLocale;
private final UserHistoryDictionary mUserHistoryDictionary;
private final SharedPreferences mPrefs;
private final Context mContext;
public UpdateDbTask(
DatabaseHelper openHelper, UserHistoryDictionaryBigramList pendingWrites,
String locale, UserHistoryDictionary dict, SharedPreferences prefs) {
public UpdateBinaryTask(UserHistoryDictionaryBigramList pendingWrites, String locale,
UserHistoryDictionary dict, SharedPreferences prefs, Context context) {
mBigramList = pendingWrites;
mLocale = locale;
mDbHelper = openHelper;
mUserHistoryDictionary = dict;
mPrefs = prefs;
}
/** Prune any old data if the database is getting too big. */
private static void checkPruneData(SQLiteDatabase db) {
db.execSQL("PRAGMA foreign_keys = ON;");
Cursor c = db.query(FREQ_TABLE_NAME, new String[] { FREQ_COLUMN_PAIR_ID },
null, null, null, null, null);
try {
int totalRowCount = c.getCount();
// prune out old data if we have too much data
if (totalRowCount > sMaxHistoryBigrams) {
int numDeleteRows = (totalRowCount - sMaxHistoryBigrams)
+ sDeleteHistoryBigrams;
int pairIdColumnId = c.getColumnIndex(FREQ_COLUMN_PAIR_ID);
c.moveToFirst();
int count = 0;
while (count < numDeleteRows && !c.isAfterLast()) {
String pairId = c.getString(pairIdColumnId);
// Deleting from MAIN table will delete the frequencies
// due to FOREIGN KEY .. ON DELETE CASCADE
db.delete(MAIN_TABLE_NAME, MAIN_COLUMN_ID + "=?",
new String[] { pairId });
c.moveToNext();
count++;
}
}
} finally {
c.close();
}
mContext = context;
mAddLevel0Bigrams = mBigramList.size() <= MAX_HISTORY_BIGRAMS;
}
@Override
protected Void doInBackground(Void... v) {
SQLiteDatabase db = null;
if (mUserHistoryDictionary.mBigramListLock.tryLock()) {
if (mUserHistoryDictionary.isTest) {
// If isTest == true, wait until the lock is released.
mUserHistoryDictionary.mBigramListLock.lock();
try {
try {
db = mDbHelper.getWritableDatabase();
} catch (android.database.sqlite.SQLiteCantOpenDatabaseException e) {
// If we can't open the db, don't do anything. Exit through the next test
// for non-nullity of the db variable.
}
if (null == db) {
// Not much we can do. Just exit.
return null;
}
db.beginTransaction();
return doLoadTaskLocked(db);
doWriteTaskLocked();
} finally {
if (db != null) {
db.endTransaction();
}
mUserHistoryDictionary.mBigramListLock.unlock();
}
} else if (mUserHistoryDictionary.mBigramListLock.tryLock()) {
doWriteTaskLocked();
}
return null;
}
private Void doLoadTaskLocked(SQLiteDatabase db) {
private void doWriteTaskLocked() {
if (DBG_STRESS_TEST) {
try {
Log.w(TAG, "Start stress in closing: " + mLocale);
Thread.sleep(15000);
Log.w(TAG, "End stress in closing");
} catch (InterruptedException e) {
Log.e(TAG, "In stress test: " + e);
}
}
final long now = PROFILE_SAVE_RESTORE ? System.currentTimeMillis() : 0;
int profTotal = 0;
int profInsert = 0;
int profDelete = 0;
db.execSQL("PRAGMA foreign_keys = ON;");
final boolean addLevel0Bigram = mBigramList.size() <= sMaxHistoryBigrams;
final String fileName = NAME + "." + mLocale + ".dict";
final File file = new File(mContext.getFilesDir(), fileName);
FileOutputStream out = null;
// Write all the entries to the db
for (String word1 : mBigramList.keySet()) {
final HashMap<String, Byte> word1Bigrams = mBigramList.getBigrams(word1);
for (String word2 : word1Bigrams.keySet()) {
if (PROFILE_SAVE_RESTORE) {
++profTotal;
}
// Get new frequency. Do not insert unigrams/bigrams which freq is "-1".
final int freq; // -1, or 0~255
if (word1 == null) { // unigram
freq = FREQUENCY_FOR_TYPED;
final byte prevFc = word1Bigrams.get(word2);
if (prevFc == FREQUENCY_FOR_TYPED) {
// No need to update since we found no changes for this entry.
// Just skip to the next entry.
if (DBG_SAVE_RESTORE) {
Log.d(TAG, "Skip update user history: " + word1 + "," + word2
+ "," + prevFc);
}
if (!DBG_ALWAYS_WRITE) {
continue;
}
}
} else { // bigram
final NextWord nw = mUserHistoryDictionary.getBigramWord(word1, word2);
if (nw != null) {
final ForgettingCurveParams fcp = nw.getFcParams();
final byte prevFc = word1Bigrams.get(word2);
final byte fc = (byte)fcp.getFc();
final boolean isValid = fcp.isValid();
if (prevFc > 0 && prevFc == fc) {
// No need to update since we found no changes for this entry.
// Just skip to the next entry.
if (DBG_SAVE_RESTORE) {
Log.d(TAG, "Skip update user history: " + word1 + ","
+ word2 + "," + prevFc);
}
if (!DBG_ALWAYS_WRITE) {
continue;
} else {
freq = fc;
}
} else if (UserHistoryForgettingCurveUtils.
needsToSave(fc, isValid, addLevel0Bigram)) {
freq = fc;
} else {
// Delete this entry
freq = -1;
}
} else {
// Delete this entry
freq = -1;
}
}
// TODO: this process of making a text search for each pair each time
// is terribly inefficient. Optimize this.
// Find pair id
Cursor c = null;
try {
out = new FileOutputStream(file);
UserHistoryDictIOUtils.writeDictionaryBinary(out, this, mBigramList, VERSION3);
out.flush();
out.close();
} catch (IOException e) {
Log.e(TAG, "IO Exception while writing file: " + e);
} finally {
if (out != null) {
try {
if (null != word1) {
c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
MAIN_COLUMN_WORD1 + "=? AND " + MAIN_COLUMN_WORD2 + "=? AND "
+ MAIN_COLUMN_LOCALE + "=?",
new String[] { word1, word2, mLocale }, null, null,
null);
} else {
c = db.query(MAIN_TABLE_NAME, new String[] { MAIN_COLUMN_ID },
MAIN_COLUMN_WORD1 + " IS NULL AND " + MAIN_COLUMN_WORD2
+ "=? AND " + MAIN_COLUMN_LOCALE + "=?",
new String[] { word2, mLocale }, null, null, null);
}
final int pairId;
if (c.moveToFirst()) {
if (PROFILE_SAVE_RESTORE) {
++profDelete;
}
// 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();
}
// Eliminate freq == 0 because that word is profanity.
if (freq > 0) {
if (PROFILE_SAVE_RESTORE) {
++profInsert;
}
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();
}
out.close();
} catch (IOException e) {
// ignore
}
}
}
checkPruneData(db);
// Save the timestamp after we finish writing the SQL DB.
// Save the timestamp after we finish writing the binary dictionary.
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);
Log.w(TAG, "PROF: Write User HistoryDictionary: " + mLocale + ", " + diff + "ms.");
}
db.setTransactionSuccessful();
return null;
}
private static ContentValues getContentValues(String word1, String word2, String locale) {
ContentValues values = new ContentValues(3);
values.put(MAIN_COLUMN_WORD1, word1);
values.put(MAIN_COLUMN_WORD2, word2);
values.put(MAIN_COLUMN_LOCALE, locale);
return values;
}
private static ContentValues getFrequencyContentValues(int pairId, int frequency) {
ContentValues values = new ContentValues(2);
values.put(FREQ_COLUMN_PAIR_ID, pairId);
values.put(COLUMN_FORGETTING_CURVE_VALUE, frequency);
return values;
@Override
public int getFrequency(String word1, String word2) {
final int freq;
if (word1 == null) { // unigram
freq = FREQUENCY_FOR_TYPED;
final byte prevFc = mBigramList.getBigrams(word1).get(word2);
} else { // bigram
final NextWord nw = mUserHistoryDictionary.getBigramWord(word1, word2);
if (nw != null) {
final ForgettingCurveParams fcp = nw.getFcParams();
final byte prevFc = mBigramList.getBigrams(word1).get(word2);
final byte fc = fcp.getFc();
final boolean isValid = fcp.isValid();
if (prevFc > 0 && prevFc == fc) {
freq = ((int)fc) & 0xFF;
} else if (UserHistoryForgettingCurveUtils.
needsToSave(fc, isValid, mAddLevel0Bigrams)) {
freq = ((int)fc) & 0xFF;
} else {
// Delete this entry
freq = -1;
}
} else {
// Delete this entry
freq = -1;
}
}
return freq;
}
}
void forceAddWordForTest(final String word1, final String word2, final boolean isValid) {
mBigramListLock.lock();
try {
addToUserHistory(word1, word2, isValid);
} finally {
mBigramListLock.unlock();
}
}
}

5
java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
View file

@ -77,7 +77,10 @@ public class BinaryDictIOUtils {
p.mAddress += BinaryDictInputOutput.getGroupCountSize(p.mNumOfCharGroup);
p.mPosition = 0;
}
if (p.mNumOfCharGroup == 0) {
stack.pop();
continue;
}
CharGroupInfo info = BinaryDictInputOutput.readCharGroup(buffer,
p.mAddress - headerSize, formatOptions);
for (int i = 0; i < info.mCharacters.length; ++i) {

109
tests/src/com/android/inputmethod/latin/UserHistoryDictionaryTests.java Normal file
View file

@ -0,0 +1,109 @@
/*
* Copyright (C) 2012 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.
*/
package com.android.inputmethod.latin;
import com.android.inputmethod.latin.UserHistoryDictionary;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.test.AndroidTestCase;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Set;
/**
* Unit tests for UserHistoryDictionary
*/
public class UserHistoryDictionaryTests extends AndroidTestCase {
private static final String TAG = UserHistoryDictionaryTests.class.getSimpleName();
private SharedPreferences mPrefs;
private static final String[] CHARACTERS = {
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"
};
@Override
public void setUp() {
mPrefs = PreferenceManager.getDefaultSharedPreferences(getContext());
}
/**
* Generates a random word.
*/
private String generateWord(final int value) {
final int lengthOfChars = CHARACTERS.length;
StringBuilder builder = new StringBuilder();
long lvalue = Math.abs((long)value);
while (lvalue > 0) {
builder.append(CHARACTERS[(int)(lvalue % lengthOfChars)]);
lvalue /= lengthOfChars;
}
return builder.toString();
}
private List<String> generateWords(final int number, final Random random) {
final Set<String> wordSet = CollectionUtils.newHashSet();
while (wordSet.size() < number) {
wordSet.add(generateWord(random.nextInt()));
}
return new ArrayList<String>(wordSet);
}
private void addToDict(final UserHistoryDictionary dict, final List<String> words) {
String prevWord = null;
for (String word : words) {
dict.forceAddWordForTest(prevWord, word, true);
prevWord = word;
}
}
public void testRandomWords() {
Log.d(TAG, "This test can be used for profiling.");
Log.d(TAG, "Usage: please set UserHisotoryDictionary.PROFILE_SAVE_RESTORE to true.");
final int numberOfWords = 1000;
final Random random = new Random(123456);
List<String> words = generateWords(numberOfWords, random);
final String locale = "testRandomWords";
final UserHistoryDictionary dict = UserHistoryDictionary.getInstance(getContext(),
locale, mPrefs);
dict.isTest = true;
addToDict(dict, words);
try {
Log.d(TAG, "waiting for adding the word ...");
Thread.sleep(2000);
} catch (InterruptedException e) {
Log.d(TAG, "InterruptedException: " + e);
}
// write to file
dict.close();
try {
Log.d(TAG, "waiting for writing ...");
Thread.sleep(5000);
} catch (InterruptedException e) {
Log.d(TAG, "InterruptedException: " + e);
}
}
}