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Java example source code file (BaseWord2VecFunction.java)

This example Java source code file (BaseWord2VecFunction.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

baseword2vecfunction, illegalstateexception, indarray, serializable, string, syn0, syn1, syn1_negative

The BaseWord2VecFunction.java Java example source code

 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.

package org.deeplearning4j.spark.models.embeddings.common;

import org.deeplearning4j.models.embeddings.inmemory.InMemoryLookupTable;
import org.nd4j.linalg.api.ndarray.INDArray;

import java.io.Serializable;

 * Base word2vec function for hazelcast.
 * Stores how the lookup table should be accessed
 * @author Adam Gibson
public class BaseWord2VecFunction implements Serializable {
    protected int fromIndex = 0,toIndex = 0;
    protected String from,to;
    public final static String SYN1 = "syn1";
    public final static String SYN0 = "syn0";
    public final static String SYN1_NEGATIVE = "syn1negative";

    public BaseWord2VecFunction(int fromIndex, int toIndex, String from, String to) {
        this.fromIndex = fromIndex;
        this.toIndex = toIndex;
        this.from = from;
        this.to = to;

    protected INDArray getFrom(InMemoryLookupTable inMemoryLookupTable) {
        switch(from) {
            case SYN0: return inMemoryLookupTable.getSyn0().slice(fromIndex).ravel();
            case SYN1 : return inMemoryLookupTable.getSyn1().slice(fromIndex).ravel();
            case SYN1_NEGATIVE: return inMemoryLookupTable.getSyn1Neg().slice(fromIndex).ravel();
            default: throw new IllegalStateException("Illegal from type " + from);

    protected INDArray getTo(InMemoryLookupTable inMemoryLookupTable) {
        switch(to) {
            case SYN0: return inMemoryLookupTable.getSyn0().slice(toIndex).ravel();
            case SYN1 : return inMemoryLookupTable.getSyn1().slice(toIndex).ravel();
            case SYN1_NEGATIVE: return inMemoryLookupTable.getSyn1Neg().slice(toIndex).ravel();
            default: throw new IllegalStateException("Illegal to type " + to);

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