/****************************************************************************
* Copyright (C) 2012 ecsec GmbH.
* All rights reserved.
* Contact: ecsec GmbH (info@ecsec.de)
*
* This file is part of the Open eCard App.
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License version 3.0 as published by the Free Software Foundation
* and appearing in the file LICENSE.GPL included in the packaging of
* this file. Please review the following information to ensure the
* GNU General Public License version 3.0 requirements will be met:
* http://www.gnu.org/copyleft/gpl.html.
*
* Other Usage
* Alternatively, this file may be used in accordance with the terms
* and conditions contained in a signed written agreement between
* you and ecsec GmbH.
*
***************************************************************************/
package org.openecard.common.tlv.iso7816;
import java.util.Arrays;
import org.openecard.common.tlv.TLV;
import org.openecard.common.tlv.TLVException;
import org.openecard.common.tlv.Tag;
/**
*
* @author Tobias Wich <tobias.wich@ecsec.de>
*/
public class TLVBitString {
private TLV tlv;
private byte[] data;
public TLVBitString(TLV tlv, long tagNumWithClass) throws TLVException {
if (tlv.getTagNumWithClass() != tagNumWithClass) {
throw new TLVException("Type numbers don't match.");
}
this.tlv = tlv;
this.data = tlv.getValue();
this.data = Arrays.copyOfRange(data, 1, data.length);
}
public TLVBitString(TLV tlv) throws TLVException {
this(tlv, Tag.BITSTRING_TAG.getTagNumWithClass());
}
public boolean isSet(int pos) {
int i = pos / 8;
int j = 1 << 7 - pos % 8;
if ((this.data != null) && (this.data.length > i)) {
int k = this.data[i];
return (k & j) != 0;
} else {
return false;
}
}
}