Java BitSet hex2BitSet(byte[] b, int offset, int maxBits)

Description

Converts an ASCII representation of a Bitmap field into a Java BitSet

License

Open Source License

Parameter

Parameter	Description
b	- hex representation
offset	- starting offset
maxBits	- max number of bits (supports 8, 16, 24, 32, 48, 52, 64,.. 128 or 192)

Return

java BitSet object

Declaration

public static BitSet hex2BitSet(byte[] b, int offset, int maxBits) 

Method Source Code

//package com.java2s;
/*//from  www  . j  a  va  2 s. c om
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2012 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.BitSet;

public class Main {
    /**
     * Converts an ASCII representation of a Bitmap field into a Java BitSet
     * 
     * @param b - hex representation
     * @param offset - starting offset
     * @param bitZeroMeansExtended - true for ISO-8583
     * @return java BitSet object
     */
    public static BitSet hex2BitSet(byte[] b, int offset, boolean bitZeroMeansExtended) {
        int len = bitZeroMeansExtended ? ((Character.digit((char) b[offset], 16) & 0x08) == 8 ? 128 : 64) : 64;
        BitSet bmap = new BitSet(len);
        for (int i = 0; i < len; i++) {
            int digit = Character.digit((char) b[offset + (i >> 2)], 16);
            if ((digit & (0x08 >> (i % 4))) > 0)
                bmap.set(i + 1);
        }
        return bmap;
    }

    /**
     * Converts an ASCII representation of a Bitmap field into a Java BitSet
     * 
     * @param b - hex representation
     * @param offset - starting offset
     * @param maxBits - max number of bits (supports 8, 16, 24, 32, 48, 52,
     *        64,.. 128 or 192)
     * @return java BitSet object
     */
    public static BitSet hex2BitSet(byte[] b, int offset, int maxBits) {
        int len = maxBits > 64 ? ((Character.digit((char) b[offset], 16) & 0x08) == 8 ? 128 : 64) : maxBits;
        BitSet bmap = new BitSet(len);
        for (int i = 0; i < len; i++) {
            int digit = Character.digit((char) b[offset + (i >> 2)], 16);
            if ((digit & (0x08 >> (i % 4))) > 0) {
                bmap.set(i + 1);
                if (i == 65 && maxBits > 128)
                    len = 192;
            }
        }
        return bmap;
    }

    /**
     * Converts an ASCII representation of a Bitmap field into a Java BitSet
     * 
     * @param bmap - BitSet
     * @param b - hex representation
     * @param bitOffset - (i.e. 0 for primary bitmap, 64 for secondary)
     * @return java BitSet object
     */
    public static BitSet hex2BitSet(BitSet bmap, byte[] b, int bitOffset) {
        int len = b.length << 2;
        for (int i = 0; i < len; i++) {
            int digit = Character.digit((char) b[i >> 2], 16);
            if ((digit & (0x08 >> (i % 4))) > 0)
                bmap.set(bitOffset + i + 1);
        }
        return bmap;
    }
}

Related

1. getBitSetFromBooleanArray(boolean[] buf)
2. getLemma(String[] tokens, BitSet bits, String delimiter)
3. getSetBitIndices(BitSet bitSet)
4. hammingDistance(BitSet bs1, BitSet bs2)
5. hasAtLeastOneBitSet(BitSet bitSet, Iterable indexes)
6. hexToBits(String s, BitSet ba, int length)
7. increment(BitSet bits, int size)
8. insertBits(BitSet fromSet, int insertBefore, int count)
9. intArrToBitSet(ArrayList integerArray)