/**
* @return
* @throws NumberFormatException
* @throws IOException
* @throws FileNotFoundException
*/
private static Word2Vec readBinaryModel(File modelFile)
throws NumberFormatException, IOException {
InMemoryLookupTable lookupTable;
VocabCache cache;
INDArray syn0;
int words, size;
try (BufferedInputStream bis =
new BufferedInputStream(
GzipUtils.isCompressedFilename(modelFile.getName())
? new GZIPInputStream(new FileInputStream(modelFile))
: new FileInputStream(modelFile));
DataInputStream dis = new DataInputStream(bis)) {
words = Integer.parseInt(readString(dis));
size = Integer.parseInt(readString(dis));
syn0 = Nd4j.create(words, size);
cache = new InMemoryLookupCache(false);
lookupTable =
(InMemoryLookupTable)
new InMemoryLookupTable.Builder().cache(cache).vectorLength(size).build();
String word;
for (int i = 0; i < words; i++) {
word = readString(dis);
log.trace("Loading " + word + " with word " + i);
if (word.isEmpty()) {
continue;
}
float[] vector = new float[size];
for (int j = 0; j < size; j++) {
vector[j] = readFloat(dis);
}
syn0.putRow(i, Transforms.unitVec(Nd4j.create(vector)));
cache.addWordToIndex(cache.numWords(), word);
cache.addToken(new VocabWord(1, word));
cache.putVocabWord(word);
}
}
Word2Vec ret = new Word2Vec();
lookupTable.setSyn0(syn0);
ret.setVocab(cache);
ret.setLookupTable(lookupTable);
return ret;
}
/**
* @param modelFile
* @return
* @throws FileNotFoundException
* @throws IOException
* @throws NumberFormatException
*/
private static Word2Vec readTextModel(File modelFile) throws IOException, NumberFormatException {
InMemoryLookupTable lookupTable;
VocabCache cache;
INDArray syn0;
BufferedReader reader = new BufferedReader(new FileReader(modelFile));
String line = reader.readLine();
String[] initial = line.split(" ");
int words = Integer.parseInt(initial[0]);
int layerSize = Integer.parseInt(initial[1]);
syn0 = Nd4j.create(words, layerSize);
cache = new InMemoryLookupCache();
int currLine = 0;
while ((line = reader.readLine()) != null) {
String[] split = line.split(" ");
String word = split[0];
if (word.isEmpty()) {
continue;
}
float[] vector = new float[split.length - 1];
for (int i = 1; i < split.length; i++) {
vector[i - 1] = Float.parseFloat(split[i]);
}
syn0.putRow(currLine, Transforms.unitVec(Nd4j.create(vector)));
cache.addWordToIndex(cache.numWords(), word);
cache.addToken(new VocabWord(1, word));
cache.putVocabWord(word);
}
lookupTable =
(InMemoryLookupTable)
new InMemoryLookupTable.Builder().cache(cache).vectorLength(layerSize).build();
lookupTable.setSyn0(syn0);
Word2Vec ret = new Word2Vec();
ret.setVocab(cache);
ret.setLookupTable(lookupTable);
reader.close();
return ret;
}
/**
* Loads an in memory cache from the given path (sets syn0 and the vocab)
*
* @param vectorsFile the path of the file to load
* @return
* @throws FileNotFoundException
*/
public static Pair<InMemoryLookupTable, VocabCache> loadTxt(File vectorsFile)
throws FileNotFoundException {
BufferedReader write = new BufferedReader(new FileReader(vectorsFile));
VocabCache cache = new InMemoryLookupCache();
InMemoryLookupTable lookupTable;
LineIterator iter = IOUtils.lineIterator(write);
List<INDArray> arrays = new ArrayList<>();
while (iter.hasNext()) {
String line = iter.nextLine();
String[] split = line.split(" ");
String word = split[0];
VocabWord word1 = new VocabWord(1.0, word);
cache.addToken(word1);
cache.addWordToIndex(cache.numWords(), word);
word1.setIndex(cache.numWords());
cache.putVocabWord(word);
INDArray row = Nd4j.create(Nd4j.createBuffer(split.length - 1));
for (int i = 1; i < split.length; i++) {
row.putScalar(i - 1, Float.parseFloat(split[i]));
}
arrays.add(row);
}
INDArray syn = Nd4j.create(new int[] {arrays.size(), arrays.get(0).columns()});
for (int i = 0; i < syn.rows(); i++) {
syn.putRow(i, arrays.get(i));
}
lookupTable =
(InMemoryLookupTable)
new InMemoryLookupTable.Builder()
.vectorLength(arrays.get(0).columns())
.useAdaGrad(false)
.cache(cache)
.build();
Nd4j.clearNans(syn);
lookupTable.setSyn0(syn);
iter.close();
return new Pair<>(lookupTable, cache);
}
