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Merge "add reconstructBigramFrequency" into jb-mr1-dev

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This commit is contained in:
Ken Wakasa 2012-08-17 03:19:12 -07:00 committed by Android (Google) Code Review
commit 72c0f4de1d
2 changed files with 25 additions and 8 deletions
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15
java/src/com/android/inputmethod/latin/UserHistoryDictionary.java
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@ -52,14 +52,14 @@ public class UserHistoryDictionary extends ExpandableDictionary {
private static final int FREQUENCY_FOR_TYPED = 2;
/** Maximum number of pairs. Pruning will start when databases goes above this number. */
private static int sMaxHistoryBigrams = 10000;
public static final int sMaxHistoryBigrams = 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.
*/
private static int sDeleteHistoryBigrams = 1000;
public static final int sDeleteHistoryBigrams = 1000;
/**
* Database version should increase if the database structure changes
@ -109,12 +109,8 @@ public class UserHistoryDictionary extends ExpandableDictionary {
private static DatabaseHelper sOpenHelper = null;
public void setDatabaseMax(int maxHistoryBigram) {
sMaxHistoryBigrams = maxHistoryBigram;
}
public void setDatabaseDelete(int deleteHistoryBigram) {
sDeleteHistoryBigrams = deleteHistoryBigram;
public String getLocale() {
return mLocale;
}
public synchronized static UserHistoryDictionary getInstance(
@ -502,9 +498,11 @@ public class UserHistoryDictionary extends ExpandableDictionary {
needsToSave(fc, isValid, addLevel0Bigram)) {
freq = fc;
} else {
// Delete this entry
freq = -1;
}
} else {
// Delete this entry
freq = -1;
}
}
@ -541,6 +539,7 @@ public class UserHistoryDictionary extends ExpandableDictionary {
getContentValues(word1, word2, mLocale));
pairId = pairIdLong.intValue();
}
// Eliminate freq == 0 because that word is profanity.
if (freq > 0) {
if (PROFILE_SAVE_RESTORE) {
++profInsert;

18
java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
View File

@ -1410,4 +1410,22 @@ public class BinaryDictInputOutput {
return false;
}
}
/**
* Calculate bigram frequency from compressed value
*
* @see #makeBigramFlags
*
* @param unigramFrequency
* @param bigramFrequency compressed frequency
* @return approximate bigram frequency
*/
public static int reconstructBigramFrequency(final int unigramFrequency,
final int bigramFrequency) {
final float stepSize = (MAX_TERMINAL_FREQUENCY - unigramFrequency)
/ (1.5f + MAX_BIGRAM_FREQUENCY);
final float resultFreqFloat = (float)unigramFrequency
+ stepSize * (bigramFrequency + 1.0f);
return (int)resultFreqFloat;
}
}