Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

recreate MapDB files if the data is corrupted #8

Merged
merged 1 commit into from
Aug 9, 2019
Merged

recreate MapDB files if the data is corrupted #8

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
54 changes: 29 additions & 25 deletions src/main/kotlin/com/github/pemistahl/lingua/internal/model/LanguageModelDeserializer.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ import com.google.gson.JsonDeserializer
import com.google.gson.JsonElement
import com.google.gson.JsonObject
import it.unimi.dsi.fastutil.objects.Object2DoubleOpenHashMap
import org.mapdb.DBException
import org.mapdb.Serializer
import org.mapdb.SortedTableMap
import org.mapdb.volume.MappedFileVol
Expand Down Expand Up @@ -68,36 +69,39 @@ internal class LanguageModelDeserializer<T : Ngram>(
Files.createDirectories(mapdbDirectoryPath)
}

return if (Files.exists(mapdbFilePath)) {
val volume = MappedFileVol.FACTORY.makeVolume(mapdbFilePath.toString(), true)
SortedTableMap.open(volume, Serializer.STRING, Serializer.DOUBLE)
}
else {
val volume = MappedFileVol.FACTORY.makeVolume(mapdbFilePath.toString(), false)
val sink: SortedTableMap.Sink<String, Double> = SortedTableMap
.create(volume, Serializer.STRING, Serializer.DOUBLE)
.pageSize(1*1024) // page size of 1KB
.nodeSize(1)
.createFromSink()

val ngramsJsonObj = jsonObj["ngrams"].asJsonObject
val tempMap = hashMapOf<String, Double>()

for ((fractionLiteral, ngramsJsonElem) in ngramsJsonObj.entrySet()) {
val fractionParts = fractionLiteral.split('/').map { it.toInt() }
val probability = fractionParts[0].toDouble() / fractionParts[1]

for (ngramJsonElem in ngramsJsonElem.asString.split(' ')) {
tempMap[ngramJsonElem] = probability
}
if (Files.exists(mapdbFilePath)) {
try {
val volume = MappedFileVol.FACTORY.makeVolume(mapdbFilePath.toString(), true)
return SortedTableMap.open(volume, Serializer.STRING, Serializer.DOUBLE)
} catch (e: DBException.DataCorruption) {
// try to recreate the database
Files.delete(mapdbFilePath)
}
}
val volume = MappedFileVol.FACTORY.makeVolume(mapdbFilePath.toString(), false)
val sink: SortedTableMap.Sink<String, Double> = SortedTableMap
.create(volume, Serializer.STRING, Serializer.DOUBLE)
.pageSize(1 * 1024) // page size of 1KB
.nodeSize(1)
.createFromSink()

val ngramsJsonObj = jsonObj["ngrams"].asJsonObject
val tempMap = hashMapOf<String, Double>()

for ((key, value) in tempMap.toList().sortedBy { it.first }) {
sink.put(key, value)
for ((fractionLiteral, ngramsJsonElem) in ngramsJsonObj.entrySet()) {
val fractionParts = fractionLiteral.split('/').map { it.toInt() }
val probability = fractionParts[0].toDouble() / fractionParts[1]

for (ngramJsonElem in ngramsJsonElem.asString.split(' ')) {
tempMap[ngramJsonElem] = probability
}
}

sink.create()
for ((key, value) in tempMap.toList().sortedBy { it.first }) {
sink.put(key, value)
}

return sink.create()
}

internal fun loadNgramsIntoMemory(jsonObj: JsonObject): Map<String, Double> {
Expand Down