I don't know of any, and neither does Google CodeSearch: http://www.google.com/codesearch?q=getAdditionalProductIdentification
Anyway, writing your own isn't that difficult. This one took me less than an hour:
package so5685964;
import java.util.Map;
import org.joda.time.DateMidnight;
import com.google.common.collect.Maps;
public class GS1Code128Data {
/** Maps the AI to the corresponding data from the barcode. */
private final Map<String, String> data = Maps.newHashMap();
private static final Map<String, AII> aiinfo = Maps.newHashMap();
static class AII {
final int minLength;
final int maxLength;
public AII(String id, int minLength, int maxLength) {
this.minLength = minLength;
this.maxLength = maxLength;
}
}
private static void ai(String id, int minLength, int maxLength) {
aiinfo.put(id, new AII(id, minLength, maxLength));
}
private static void ai(String id, int length) {
aiinfo.put(id, new AII(id, length, length));
}
static {
ai("00", 18, 18);
ai("01", 14);
ai("02", 14);
ai("10", 1, 20);
ai("11", 6);
ai("12", 6);
// TODO: continue according to http://en.wikipedia.org/wiki/GS1-128
}
/**
* Decodes a Unicode string from a Code128-like encoding.
*
* @param fnc1 The character that represents FNC1.
*/
public GS1Code128Data(String s, char fnc1) {
StringBuilder ai = new StringBuilder();
int index = 0;
while (index < s.length()) {
ai.append(s.charAt(index++));
AII info = aiinfo.get(ai.toString());
if (info != null) {
StringBuilder value = new StringBuilder();
for (int i = 0; i < info.maxLength && index < s.length(); i++) {
char c = s.charAt(index++);
if (c == fnc1) {
break;
}
value.append(c);
}
if (value.length() < info.minLength) {
throw new IllegalArgumentException("Short field for AI \"" + ai + "\": \"" + value + "\".");
}
data.put(ai.toString(), value.toString());
ai.setLength(0);
}
}
if (ai.length() > 0) {
throw new IllegalArgumentException("Unknown AI \"" + ai + "\".");
}
}
private static DateMidnight asDate(String s) {
if (s == null) {
return null;
}
String century = s.compareTo("500000") < 0 ? "20" : "19";
return new DateMidnight(century + s);
}
public DateMidnight getDueDate() {
return asDate(data.get("12"));
}
}
And some demonstration code:
package so5685964;
public class BarcodeDemo {
public static void main(String[] args) {
String barcode = "12110416";
GS1Code128Data data = new GS1Code128Data(barcode, '\f');
System.out.println(data.getDueDate());
}
}
When you assume that your input is already a String, pay attention to encoding issues. The FNC1 code does not have a corresponding Unicode Code Point, so it has to be encoded in some other way.
