org.deeplearning4j.models.word2vec.Word2Vec Maven / Gradle / Ivy
package org.deeplearning4j.models.word2vec;
import lombok.Getter;
import lombok.NonNull;
import org.deeplearning4j.models.embeddings.WeightLookupTable;
import org.deeplearning4j.models.embeddings.learning.ElementsLearningAlgorithm;
import org.deeplearning4j.models.embeddings.loader.VectorsConfiguration;
import org.deeplearning4j.models.embeddings.reader.ModelUtils;
import org.deeplearning4j.models.embeddings.wordvectors.WordVectors;
import org.deeplearning4j.models.sequencevectors.SequenceVectors;
import org.deeplearning4j.models.sequencevectors.interfaces.SequenceIterator;
import org.deeplearning4j.models.sequencevectors.interfaces.VectorsListener;
import org.deeplearning4j.models.sequencevectors.iterators.AbstractSequenceIterator;
import org.deeplearning4j.models.sequencevectors.transformers.impl.SentenceTransformer;
import org.deeplearning4j.models.word2vec.wordstore.VocabCache;
import org.deeplearning4j.text.documentiterator.DocumentIterator;
import org.deeplearning4j.text.invertedindex.InvertedIndex;
import org.deeplearning4j.text.sentenceiterator.SentenceIterator;
import org.deeplearning4j.text.sentenceiterator.StreamLineIterator;
import org.deeplearning4j.text.tokenization.tokenizerfactory.DefaultTokenizerFactory;
import org.deeplearning4j.text.tokenization.tokenizerfactory.TokenizerFactory;
import java.util.Collection;
import java.util.List;
/**
* This is Word2Vec implementation based on SequenceVectors
*
* @author [email protected]
*/
public class Word2Vec extends SequenceVectors {
protected transient SentenceIterator sentenceIter;
@Getter protected transient TokenizerFactory tokenizerFactory;
/**
* This method defines TokenizerFactory instance to be using during model building
*
* @param tokenizerFactory TokenizerFactory instance
*/
public void setTokenizerFactory(@NonNull TokenizerFactory tokenizerFactory) {
this.tokenizerFactory = tokenizerFactory;
if (sentenceIter != null) {
SentenceTransformer transformer = new SentenceTransformer.Builder()
.iterator(sentenceIter)
.tokenizerFactory(this.tokenizerFactory)
.build();
this.iterator = new AbstractSequenceIterator.Builder<>(transformer).build();
}
}
/**
* This method defines SentenceIterator instance, that will be used as training corpus source
*
* @param iterator SentenceIterator instance
*/
public void setSentenceIter(@NonNull SentenceIterator iterator) {
//if (tokenizerFactory == null) throw new IllegalStateException("Please call setTokenizerFactory() prior to setSentenceIter() call.");
if (tokenizerFactory != null) {
SentenceTransformer transformer = new SentenceTransformer.Builder()
.iterator(iterator)
.tokenizerFactory(tokenizerFactory)
.build();
this.iterator = new AbstractSequenceIterator.Builder<>(transformer).build();
}
}
public static class Builder extends SequenceVectors.Builder {
protected SentenceIterator sentenceIterator;
protected TokenizerFactory tokenizerFactory;
public Builder() {
}
/**
* This method has no effect for Word2Vec
*
* @param vec existing WordVectors model
* @return
*/
@Override
protected Builder useExistingWordVectors(@NonNull WordVectors vec) {
return this;
}
public Builder(@NonNull VectorsConfiguration configuration) {
super(configuration);
}
public Builder iterate(@NonNull DocumentIterator iterator) {
this.sentenceIterator = new StreamLineIterator.Builder(iterator)
.setFetchSize(100)
.build();
return this;
}
/**
* This method used to feed SentenceIterator, that contains training corpus, into ParagraphVectors
*
* @param iterator
* @return
*/
public Builder iterate(@NonNull SentenceIterator iterator) {
this.sentenceIterator = iterator;
return this;
}
/**
* This method defines TokenizerFactory to be used for strings tokenization during training
* PLEASE NOTE: If external VocabCache is used, the same TokenizerFactory should be used to keep derived tokens equal.
*
* @param tokenizerFactory
* @return
*/
public Builder tokenizerFactory(@NonNull TokenizerFactory tokenizerFactory) {
this.tokenizerFactory = tokenizerFactory;
return this;
}
@Deprecated
public Builder index(@NonNull InvertedIndex index) {
return this;
}
/**
* This method used to feed SequenceIterator, that contains training corpus, into ParagraphVectors
*
* @param iterator
* @return
*/
@Override
public Builder iterate(@NonNull SequenceIterator iterator) {
super.iterate(iterator);
return this;
}
/**
* This method defines mini-batch size
* @param batchSize
* @return
*/
@Override
public Builder batchSize(int batchSize) {
super.batchSize(batchSize);
return this;
}
/**
* This method defines number of iterations done for each mini-batch during training
* @param iterations
* @return
*/
@Override
public Builder iterations(int iterations) {
super.iterations(iterations);
return this;
}
/**
* This method defines number of epochs (iterations over whole training corpus) for training
* @param numEpochs
* @return
*/
@Override
public Builder epochs(int numEpochs) {
super.epochs(numEpochs);
return this;
}
/**
* This method defines number of dimensions for output vectors
* @param layerSize
* @return
*/
@Override
public Builder layerSize(int layerSize) {
super.layerSize(layerSize);
return this;
}
/**
* This method defines initial learning rate for model training
*
* @param learningRate
* @return
*/
@Override
public Builder learningRate(double learningRate) {
super.learningRate(learningRate);
return this;
}
/**
* This method defines minimal word frequency in training corpus. All words below this threshold will be removed prior model training
*
* @param minWordFrequency
* @return
*/
@Override
public Builder minWordFrequency(int minWordFrequency) {
super.minWordFrequency(minWordFrequency);
return this;
}
/**
* This method defines minimal learning rate value for training
*
* @param minLearningRate
* @return
*/
@Override
public Builder minLearningRate(double minLearningRate) {
super.minLearningRate(minLearningRate);
return this;
}
/**
* This method defines whether model should be totally wiped out prior building, or not
*
* @param reallyReset
* @return
*/
@Override
public Builder resetModel(boolean reallyReset) {
super.resetModel(reallyReset);
return this;
}
/**
* This method allows to define external VocabCache to be used
*
* @param vocabCache
* @return
*/
@Override
public Builder vocabCache(@NonNull VocabCache vocabCache) {
super.vocabCache(vocabCache);
return this;
}
/**
* This method allows to define external WeightLookupTable to be used
*
* @param lookupTable
* @return
*/
@Override
public Builder lookupTable(@NonNull WeightLookupTable lookupTable) {
super.lookupTable(lookupTable);
return this;
}
/**
* This method defines whether subsampling should be used or not
*
* @param sampling set > 0 to subsampling argument, or 0 to disable
* @return
*/
@Override
public Builder sampling(double sampling) {
super.sampling(sampling);
return this;
}
/**
* This method defines whether adaptive gradients should be used or not
*
* @param reallyUse
* @return
*/
@Override
public Builder useAdaGrad(boolean reallyUse) {
super.useAdaGrad(reallyUse);
return this;
}
/**
* This method defines whether negative sampling should be used or not
*
* @param negative set > 0 as negative sampling argument, or 0 to disable
* @return
*/
@Override
public Builder negativeSample(double negative) {
super.negativeSample(negative);
return this;
}
/**
* This method defines stop words that should be ignored during training
*
* @param stopList
* @return
*/
@Override
public Builder stopWords(@NonNull List stopList) {
super.stopWords(stopList);
return this;
}
/**
* This method is hardcoded to TRUE, since that's whole point of Word2Vec
*
* @param trainElements
* @return
*/
@Override
public Builder trainElementsRepresentation(boolean trainElements) {
throw new IllegalStateException("You can't change this option for Word2Vec");
}
/**
* This method is hardcoded to FALSE, since that's whole point of Word2Vec
*
* @param trainSequences
* @return
*/
@Override
public Builder trainSequencesRepresentation(boolean trainSequences) {
throw new IllegalStateException("You can't change this option for Word2Vec");
}
/**
* This method defines stop words that should be ignored during training
*
* @param stopList
* @return
*/
@Override
public Builder stopWords(@NonNull Collection stopList) {
super.stopWords(stopList);
return this;
}
/**
* This method defines context window size
*
* @param windowSize
* @return
*/
@Override
public Builder windowSize(int windowSize) {
super.windowSize(windowSize);
return this;
}
/**
* This method defines random seed for random numbers generator
* @param randomSeed
* @return
*/
@Override
public Builder seed(long randomSeed) {
super.seed(randomSeed);
return this;
}
/**
* This method defines maximum number of concurrent threads available for training
*
* @param numWorkers
* @return
*/
@Override
public Builder workers(int numWorkers) {
super.workers(numWorkers);
return this;
}
/**
* Sets ModelUtils that gonna be used as provider for utility methods: similarity(), wordsNearest(), accuracy(), etc
*
* @param modelUtils model utils to be used
* @return
*/
@Override
public Builder modelUtils(@NonNull ModelUtils modelUtils) {
super.modelUtils(modelUtils);
return this;
}
/**
* This method allows to use variable window size. In this case, every batch gets processed using one of predefined window sizes
*
* @param windows
* @return
*/
@Override
public Builder useVariableWindow(int... windows) {
super.useVariableWindow(windows);
return this;
}
/**
* This method allows you to specify SequenceElement that will be used as UNK element, if UNK is used
*
* @param element
* @return
*/
@Override
public Builder unknownElement(VocabWord element) {
super.unknownElement(element);
return this;
}
/**
* This method allows you to specify, if UNK word should be used internally
*
* @param reallyUse
* @return
*/
@Override
public Builder useUnknown(boolean reallyUse) {
super.useUnknown(reallyUse);
if (this.unknownElement == null) {
this.unknownElement(new VocabWord(1.0, Word2Vec.DEFAULT_UNK));
}
return this;
}
/**
* This method sets VectorsListeners for this SequenceVectors model
*
* @param vectorsListeners
* @return
*/
@Override
public Builder setVectorsListeners(@NonNull Collection> vectorsListeners) {
super.setVectorsListeners(vectorsListeners);
return this;
}
@Override
public Builder elementsLearningAlgorithm(@NonNull String algorithm) {
super.elementsLearningAlgorithm(algorithm);
return this;
}
@Override
public Builder elementsLearningAlgorithm(@NonNull ElementsLearningAlgorithm algorithm) {
super.elementsLearningAlgorithm(algorithm);
return this;
}
public Word2Vec build() {
presetTables();
Word2Vec ret = new Word2Vec();
if (sentenceIterator != null) {
if (tokenizerFactory == null) tokenizerFactory = new DefaultTokenizerFactory();
SentenceTransformer transformer = new SentenceTransformer.Builder()
.iterator(sentenceIterator)
.tokenizerFactory(tokenizerFactory)
.build();
this.iterator = new AbstractSequenceIterator.Builder<>(transformer).build();
}
ret.numEpochs = this.numEpochs;
ret.numIterations = this.iterations;
ret.vocab = this.vocabCache;
ret.minWordFrequency = this.minWordFrequency;
ret.learningRate.set(this.learningRate);
ret.minLearningRate = this.minLearningRate;
ret.sampling = this.sampling;
ret.negative = this.negative;
ret.layerSize = this.layerSize;
ret.batchSize = this.batchSize;
ret.learningRateDecayWords = this.learningRateDecayWords;
ret.window = this.window;
ret.resetModel = this.resetModel;
ret.useAdeGrad = this.useAdaGrad;
ret.stopWords = this.stopWords;
ret.workers = this.workers;
ret.useUnknown = this.useUnknown;
ret.unknownElement = this.unknownElement;
ret.variableWindows = this.variableWindows;
ret.iterator = this.iterator;
ret.lookupTable = this.lookupTable;
ret.tokenizerFactory = this.tokenizerFactory;
ret.modelUtils = this.modelUtils;
ret.elementsLearningAlgorithm = this.elementsLearningAlgorithm;
ret.sequenceLearningAlgorithm = this.sequenceLearningAlgorithm;
this.configuration.setLearningRate(this.learningRate);
this.configuration.setLayersSize(layerSize);
this.configuration.setHugeModelExpected(hugeModelExpected);
this.configuration.setWindow(window);
this.configuration.setMinWordFrequency(minWordFrequency);
this.configuration.setIterations(iterations);
this.configuration.setSeed(seed);
this.configuration.setBatchSize(batchSize);
this.configuration.setLearningRateDecayWords(learningRateDecayWords);
this.configuration.setMinLearningRate(minLearningRate);
this.configuration.setSampling(this.sampling);
this.configuration.setUseAdaGrad(useAdaGrad);
this.configuration.setNegative(negative);
this.configuration.setEpochs(this.numEpochs);
this.configuration.setStopList(this.stopWords);
this.configuration.setVariableWindows(variableWindows);
ret.configuration = this.configuration;
// we hardcode
ret.trainSequenceVectors = false;
ret.trainElementsVectors = true;
ret.eventListeners = this.vectorsListeners;
return ret;
}
}
}