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Make ProbabilityEntry immutable. 

Bug: 11073222
Change-Id: Ia3c0eb2d8cac00f0d82a72b27a08ad13eb095e8a
main
Keisuke Kuroyanagi 2013-12-04 19:50:59 +09:00
parent ef7409bfaa
commit d7a179f437
6 changed files with 58 additions and 52 deletions
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18
native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.cpp
View File

@ -23,12 +23,10 @@
namespace latinime {
void ProbabilityDictContent::getProbabilityEntry(const int terminalId,
ProbabilityEntry *const outProbabilityEntry) const {
const ProbabilityEntry ProbabilityDictContent::getProbabilityEntry(const int terminalId) const {
if (terminalId < 0 || terminalId >= mSize) {
// This method can be called with invalid terminal id during GC.
outProbabilityEntry->setProbability(0 /* flags */, NOT_A_PROBABILITY);
return;
return ProbabilityEntry(0 /* flags */, NOT_A_PROBABILITY);
}
const BufferWithExtendableBuffer *const buffer = getBuffer();
int entryPos = getEntryPos(terminalId);
@ -43,10 +41,9 @@ void ProbabilityDictContent::getProbabilityEntry(const int terminalId,
Ver4DictConstants::WORD_LEVEL_FIELD_SIZE, &entryPos);
const int count = buffer->readUintAndAdvancePosition(
Ver4DictConstants::WORD_COUNT_FIELD_SIZE, &entryPos);
outProbabilityEntry->setProbabilityWithHistricalInfo(flags, probability, timestamp, level,
count);
return ProbabilityEntry(flags, probability, timestamp, level, count);
} else {
outProbabilityEntry->setProbability(flags, probability);
return ProbabilityEntry(flags, probability);
}
}
@ -76,9 +73,8 @@ bool ProbabilityDictContent::setProbabilityEntry(const int terminalId,
bool ProbabilityDictContent::flushToFile(const char *const dictDirPath) const {
if (getEntryPos(mSize) < getBuffer()->getTailPosition()) {
ProbabilityDictContent probabilityDictContentToWrite(mHasHistoricalInfo);
ProbabilityEntry probabilityEntry;
for (int i = 0; i < mSize; ++i) {
getProbabilityEntry(i, &probabilityEntry);
const ProbabilityEntry probabilityEntry = getProbabilityEntry(i);
if (!probabilityDictContentToWrite.setProbabilityEntry(i, &probabilityEntry)) {
AKLOGE("Cannot set probability entry in flushToFile. terminalId: %d", i);
return false;
@ -95,10 +91,10 @@ bool ProbabilityDictContent::runGC(
const TerminalPositionLookupTable::TerminalIdMap *const terminalIdMap,
const ProbabilityDictContent *const originalProbabilityDictContent) {
mSize = 0;
ProbabilityEntry probabilityEntry;
for (TerminalPositionLookupTable::TerminalIdMap::const_iterator it = terminalIdMap->begin();
it != terminalIdMap->end(); ++it) {
originalProbabilityDictContent->getProbabilityEntry(it->first, &probabilityEntry);
const ProbabilityEntry probabilityEntry =
originalProbabilityDictContent->getProbabilityEntry(it->first);
if (!setProbabilityEntry(it->second, &probabilityEntry)) {
AKLOGE("Cannot set probability entry in runGC. terminalId: %d", it->second);
return false;

3
native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_dict_content.h
View File

@ -38,8 +38,7 @@ class ProbabilityDictContent : public SingleDictContent {
ProbabilityDictContent(const bool hasHistoricalInfo)
: mHasHistoricalInfo(hasHistoricalInfo), mSize(0) {}
void getProbabilityEntry(const int terminalId,
ProbabilityEntry *const outProbabilityEntry) const;
const ProbabilityEntry getProbabilityEntry(const int terminalId) const;
bool setProbabilityEntry(const int terminalId, const ProbabilityEntry *const probabilityEntry);

45
native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/probability_entry.h
View File

@ -24,25 +24,29 @@ namespace latinime {
class ProbabilityEntry {
public:
ProbabilityEntry(const ProbabilityEntry &probabilityEntry)
: mFlags(probabilityEntry.mFlags), mProbability(probabilityEntry.mProbability),
mTimestamp(probabilityEntry.mTimestamp), mLevel(probabilityEntry.mLevel),
mCount(probabilityEntry.mCount) {}
// Dummy entry
ProbabilityEntry()
: mFlags(0), mProbability(NOT_A_PROBABILITY),
mTimestamp(Ver4DictConstants::NOT_A_TIME_STAMP), mLevel(0), mCount(0) {}
void setProbability(const int flags, const int probability) {
mFlags = flags;
mProbability = probability;
mTimestamp = Ver4DictConstants::NOT_A_TIME_STAMP;
mLevel = 0;
mCount = 0;
}
// Entry without historical information
ProbabilityEntry(const int flags, const int probability)
: mFlags(flags), mProbability(probability),
mTimestamp(Ver4DictConstants::NOT_A_TIME_STAMP), mLevel(0), mCount(0) {}
void setProbabilityWithHistricalInfo(const int flags, const int probability,
const int timestamp, const int level, const int count) {
mFlags = flags;
mProbability = probability;
mTimestamp = timestamp;
mLevel = level;
mCount = count;
// Entry with historical information.
ProbabilityEntry(const int flags, const int probability, const int timestamp,
const int level, const int count)
: mFlags(flags), mProbability(probability), mTimestamp(timestamp), mLevel(level),
mCount(count) {}
const ProbabilityEntry createEntryWithUpdatedProbability(const int probability) const {
return ProbabilityEntry(mFlags, probability, mTimestamp, mLevel, mCount);
}
int getFlags() const {
@ -66,13 +70,14 @@ class ProbabilityEntry {
}
private:
DISALLOW_COPY_AND_ASSIGN(ProbabilityEntry);
// Copy constructor is public to use this class as a type of return value.
DISALLOW_ASSIGNMENT_OPERATOR(ProbabilityEntry);
int mFlags;
int mProbability;
int mTimestamp;
int mLevel;
int mCount;
const int mFlags;
const int mProbability;
const int mTimestamp;
const int mLevel;
const int mCount;
};
} // namespace latinime
#endif /* LATINIME_PROBABILITY_ENTRY_H */

4
native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_node_reader.cpp
View File

@ -60,8 +60,8 @@ const PtNodeParams Ver4PatriciaTrieNodeReader::fetchPtNodeInfoFromBufferAndProce
terminalIdFieldPos += mBuffer->getOriginalBufferSize();
}
terminalId = Ver4PatriciaTrieReadingUtils::getTerminalIdAndAdvancePosition(dictBuf, &pos);
ProbabilityEntry probabilityEntry;
mProbabilityDictContent->getProbabilityEntry(terminalId, &probabilityEntry);
const ProbabilityEntry probabilityEntry =
mProbabilityDictContent->getProbabilityEntry(terminalId);
probability = probabilityEntry.getProbability();
}
int childrenPosFieldPos = pos;

33
native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_node_writer.cpp
View File

@ -112,12 +112,11 @@ bool Ver4PatriciaTrieNodeWriter::updatePtNodeProbability(
if (!toBeUpdatedPtNodeParams->isTerminal()) {
return false;
}
const int probabilityToWrite = getUpdatedProbability(toBeUpdatedPtNodeParams->getProbability(),
newProbability);
ProbabilityEntry probabilityEntry;
mBuffers->getProbabilityDictContent()->getProbabilityEntry(
toBeUpdatedPtNodeParams->getTerminalId(), &probabilityEntry);
probabilityEntry.setProbability(probabilityEntry.getFlags(), probabilityToWrite);
const ProbabilityEntry originalProbabilityEntry =
mBuffers->getProbabilityDictContent()->getProbabilityEntry(
toBeUpdatedPtNodeParams->getTerminalId());
const ProbabilityEntry probabilityEntry = createUpdatedEntryFrom(&originalProbabilityEntry,
newProbability, timestamp);
return mBuffers->getUpdatableProbabilityDictContent()->setProbabilityEntry(
toBeUpdatedPtNodeParams->getTerminalId(), &probabilityEntry);
}
@ -150,12 +149,11 @@ bool Ver4PatriciaTrieNodeWriter::writeNewTerminalPtNodeAndAdvancePosition(
return false;
}
// Write probability.
const int probabilityToWrite = getUpdatedProbability(NOT_A_PROBABILITY,
ptNodeParams->getProbability());
ProbabilityEntry probabilityEntry;
probabilityEntry.setProbability(0 /* flags */, probabilityToWrite);
ProbabilityEntry newProbabilityEntry;
const ProbabilityEntry probabilityEntryToWrite = createUpdatedEntryFrom(
&newProbabilityEntry, ptNodeParams->getProbability(), timestamp);
return mBuffers->getUpdatableProbabilityDictContent()->setProbabilityEntry(terminalId,
&probabilityEntry);
&probabilityEntryToWrite);
}
bool Ver4PatriciaTrieNodeWriter::addNewBigramEntry(
@ -283,13 +281,16 @@ bool Ver4PatriciaTrieNodeWriter::writePtNodeAndGetTerminalIdAndAdvancePosition(
return true;
}
int Ver4PatriciaTrieNodeWriter::getUpdatedProbability(const int originalProbability,
const int newProbability) const {
const ProbabilityEntry Ver4PatriciaTrieNodeWriter::createUpdatedEntryFrom(
const ProbabilityEntry *const originalProbabilityEntry, const int newProbability,
const int timestamp) const {
if (mNeedsToDecayWhenUpdating) {
return ForgettingCurveUtils::getUpdatedEncodedProbability(originalProbability,
newProbability);
// TODO: Update historical information.
const int updatedProbability = ForgettingCurveUtils::getUpdatedEncodedProbability(
originalProbabilityEntry->getProbability(), newProbability);
return originalProbabilityEntry->createEntryWithUpdatedProbability(updatedProbability);
} else {
return newProbability;
return originalProbabilityEntry->createEntryWithUpdatedProbability(newProbability);
}
}

7
native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_node_writer.h
View File

@ -23,6 +23,7 @@
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_params.h"
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_writer.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_reading_helper.h"
#include "suggest/policyimpl/dictionary/structure/v4/content/probability_entry.h"
#include "suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_node_reader.h"
namespace latinime {
@ -89,7 +90,11 @@ class Ver4PatriciaTrieNodeWriter : public PtNodeWriter {
const PtNodeParams *const ptNodeParams, int *const outTerminalId,
int *const ptNodeWritingPos);
int getUpdatedProbability(const int originalProbability, const int newProbability) const;
// Create updated probability entry using given probability and timestamp. In addition to the
// probability, this method updates historical information if needed.
const ProbabilityEntry createUpdatedEntryFrom(
const ProbabilityEntry *const originalProbabilityEntry, const int newProbability,
const int timestamp) const;
static const int CHILDREN_POSITION_FIELD_SIZE;