DataStructuresHomogenTensor.java

/* file: DataStructuresHomogenTensor.java */
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* Copyright 2014-2019 Intel Corporation.
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/*
 //  Content:
 //     Java example of using homogeneous data structures
 */

package com.intel.daal.examples.datasource;

import java.nio.FloatBuffer;
import com.intel.daal.data_management.data.HomogenTensor;
import com.intel.daal.examples.utils.Service;
import com.intel.daal.services.DaalContext;


class DataStructuresHomogenTensor {
    private static DaalContext context = new DaalContext();

    public static void main(String[] args) {
        int readFeatureIdx;

        float[] data = {1,2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,21,22,23,24,25,26,27,28,29};

        long[] dims = {3,3,3};

        System.out.println("Initial data:");
        for(int i= 0;i<dims[0]*dims[1]*dims[2];i++)
        {
            System.out.format("% 5.1f ", data[i]);
        }
        System.out.println("");

        HomogenTensor dataTensor = new HomogenTensor(context, dims, data);

        long fDims[] = {0,1};

        FloatBuffer dataFloatSubtensor = FloatBuffer.allocate(2);

        dataTensor.getSubtensor(fDims, 1, 2, dataFloatSubtensor);

        int sub_demension = dataFloatSubtensor.arrayOffset() + 1;
        int sub_size = dataFloatSubtensor.capacity();

        System.out.format("Subtensor dimensions: % 5.1f\n", (float)sub_demension);
        System.out.format("Subtensor size: % 5.1f\n", (float)sub_size);
        System.out.println("Subtensor data:");
        for(int i= 0;i<sub_size;i++)
        {
            System.out.format("% 5.1f ", dataFloatSubtensor.get(i));
        }
        System.out.println("");

        dataFloatSubtensor.put(-1);

        dataTensor.releaseSubtensor(fDims, 1, 2, dataFloatSubtensor);

        System.out.println("Data after modification:");
        for(int i= 0;i<dims[0]*dims[1]*dims[2];i++)
        {
            System.out.format("% 5.1f ", data[i]);
        }
        System.out.println("");

        context.dispose();
    }

    private static void printFloatBuffer(FloatBuffer buf, long nColumns, long nRows, String message) {
        int step = (int) nColumns;
        System.out.println(message);
        for (int i = 0; i < nRows; i++) {
            for (int j = 0; j < nColumns; j++) {
                System.out.format("%6.3f   ", buf.get(i * step + j));
            }
            System.out.println("");
        }
        System.out.println("");
    }

    private static void printFloatArray(float[] buf, long nColumns, long nRows, String message) {
        int step = (int) nColumns;
        System.out.println(message);
        for (int i = 0; i < nRows; i++) {
            for (int j = 0; j < nColumns; j++) {
                System.out.format("%6.3f   ", buf[i * step + j]);
            }
            System.out.println("");
        }
        System.out.println("");
    }
}
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