package com.jmatio.types; import java.nio.ByteBuffer; /** * Class represents Int64 (long) array (matrix) * * @author Wojciech Gradkowski */ public class MLInt64 extends MLNumericArray { /** * Normally this constructor is used only by MatFileReader and MatFileWriter * * @param name - array name * @param dims - array dimensions * @param type - array type: here mxDOUBLE_CLASS * @param attributes - array flags */ public MLInt64( String name, int[] dims, int type, int attributes ) { super( name, dims, type, attributes ); } /** * Create a {@link MLInt64} array with given name, * and dimensions. * * @param name - array name * @param dims - array dimensions */ public MLInt64(String name, int[] dims) { super(name, dims, MLArray.mxINT64_CLASS, 0); } /** * Jama [math.nist.gov] style: * construct a 2D real matrix from a one-dimensional packed array * * @param name - array name * @param vals - One-dimensional array of doubles, packed by columns (ala Fortran). * @param m - Number of rows */ public MLInt64(String name, Long[] vals, int m ) { super(name, MLArray.mxINT64_CLASS, vals, m ); } /** * Jama [math.nist.gov] style: * construct a 2D real matrix from byte[][] * * Note: array is converted to Byte[] * * @param name - array name * @param vals - two-dimensional array of values */ public MLInt64( String name, long[][] vals ) { this( name, long2DToLong(vals), vals.length ); } /** * Jama [math.nist.gov] style: * construct a matrix from a one-dimensional packed array * * @param name - array name * @param vals - One-dimensional array of doubles, packed by columns (ala Fortran). * @param m - Number of rows */ public MLInt64(String name, long[] vals, int m) { this(name, castToLong( vals ), m ); } /** * Gets two-dimensional real array. * * @return - 2D real array */ public long[][] getArray() { long[][] result = new long[getM()][]; for ( int m = 0; m < getM(); m++ ) { result[m] = new long[ getN() ]; for ( int n = 0; n < getN(); n++ ) { result[m][n] = getReal(m,n); } } return result; } /** * Casts Double[] to byte[] * * @param - source Long[] * @return - result long[] */ private static Long[] castToLong( long[] d ) { Long[] dest = new Long[d.length]; for ( int i = 0; i < d.length; i++ ) { dest[i] = (long)d[i]; } return dest; } /** * Converts byte[][] to Long[] * * @param dd * @return */ private static Long[] long2DToLong ( long[][] dd ) { Long[] d = new Long[ dd.length*dd[0].length ]; for ( int n = 0; n < dd[0].length; n++ ) { for ( int m = 0; m < dd.length; m++ ) { d[ m+n*dd.length ] = dd[m][n]; } } return d; } public Long buldFromBytes(byte[] bytes) { if ( bytes.length != getBytesAllocated() ) { throw new IllegalArgumentException( "To build from byte array I need array of size: " + getBytesAllocated() ); } return ByteBuffer.wrap( bytes ).getLong(); } public int getBytesAllocated() { return Long.SIZE >> 3; } public Class getStorageClazz() { return Long.class; } public byte[] getByteArray(Long value) { int byteAllocated = getBytesAllocated(); ByteBuffer buff = ByteBuffer.allocate( byteAllocated ); buff.putLong( value ); return buff.array(); } }