com.jadice.barcode.linear.c39.Code39ChecksumVerifier Maven / Gradle / Ivy
/**
* jadice barcode engine - a Java-based barcode decoding engine
*
* Copyright (C) 1995-${year} levigo holding gmbh. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or modify it under the terms of the
* GNU Lesser General Public License as published by the Free Software Foundation; either version
* 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this library;
* if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Contact: [email protected]
*/
package com.jadice.barcode.linear.c39;
import com.jadice.barcode.AbstractDecoder.CodeString;
import com.jadice.barcode.checksum.ChecksumVerifier;
public class Code39ChecksumVerifier implements ChecksumVerifier {
@Override
public boolean verifyChecksum(CodeString result) {
int[] codes = result.getCodes();
if (codes.length > 2) {
int sum = 0;
for (int i = 1; i < codes.length - 2; i++) {
Integer s = Code39Constants.INDEXBYSYMBOL.get((char) codes[i]);
if (null == s)
break;
sum += s;
}
Integer cs = Code39Constants.INDEXBYSYMBOL.get((char) codes[codes.length - 2]);
if (null != cs && (sum % 43) == cs.intValue()) {
result.setChecksumVerificationOK(true);
return true;
}
}
return false;
}
}