Java example source code file (BaseWord2VecFunction.java)

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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);
        }
    }
}