Example usage for java.io DataInput readInt

Introduction

In this page you can find the example usage for java.io DataInput readInt.

Prototype

int readInt() throws IOException;

Source Link

Document

Reads four input bytes and returns an int value.

Usage

From source file:com.ibm.bi.dml.runtime.matrix.data.MatrixBlock.java

/**
 * /*from   w  w w  . ja  v a  2 s  . com*/
 * @param in
 * @throws IOException
 */
private void readSparseBlock(DataInput in) throws IOException {
    allocateSparseRowsBlock(false);
    resetSparse(); //reset all sparse rows

    if (in instanceof MatrixBlockDataInput) //fast deserialize
    {
        MatrixBlockDataInput mbin = (MatrixBlockDataInput) in;
        nonZeros = mbin.readSparseRows(rlen, sparseRows);
    } else if (in instanceof DataInputBuffer && MRJobConfiguration.USE_BINARYBLOCK_SERIALIZATION) {
        //workaround because sequencefile.reader.next(key, value) does not yet support serialization framework
        DataInputBuffer din = (DataInputBuffer) in;
        MatrixBlockDataInput mbin = new FastBufferedDataInputStream(din);
        nonZeros = mbin.readSparseRows(rlen, sparseRows);
        ((FastBufferedDataInputStream) mbin).close();
    } else //default deserialize
    {
        for (int r = 0; r < rlen; r++) {
            int nr = in.readInt();
            if (nr == 0) {
                if (sparseRows[r] != null)
                    sparseRows[r].reset(estimatedNNzsPerRow, clen);
                continue;
            }
            if (sparseRows[r] == null)
                sparseRows[r] = new SparseRow(nr);
            else
                sparseRows[r].reset(nr, clen);
            for (int j = 0; j < nr; j++)
                sparseRows[r].append(in.readInt(), in.readDouble());
        }
    }
}