work on #3 - catch IOOBE

src/main/java/com/solab/iso8583/parse/NumericParseInfo.java

@@ -57,10 +57,15 @@ public class NumericParseInfo extends AlphaNumericFieldParseInfo {
 			//Use a BigInteger
 			char[] digits = new char[length];
 			int start = 0;
-			for (int i = pos; i < pos + (length / 2) + (length % 2); i++) {
-				digits[start++] = (char)(((buf[i] & 0xf0) >> 4) + 48);
-				digits[start++] = (char)((buf[i] & 0x0f) + 48);
-			}
+            try {
+                for (int i = pos; i < pos + (length / 2) + (length % 2); i++) {
+                    digits[start++] = (char)(((buf[i] & 0xf0) >> 4) + 48);
+                    digits[start++] = (char)((buf[i] & 0x0f) + 48);
+                }
+            } catch (IndexOutOfBoundsException ex) {
+                throw new ParseException(String.format("Insufficient data for bin %s field of length %d, pos %d",
+             				type, length, pos), pos);
+            }
 			return new IsoValue<Number>(IsoType.NUMERIC, new BigInteger(new String(digits)), length, null);
 		}
 	}