Fixed toString so it prints something more meaningful. [27678515]

src/main/java/edu/cmu/sv/arinc838/util/Converter.java

@@ -14,4 +14,16 @@ public class Converter {
 	public static byte[] hexToBytes(String hexString) {
 		return new HexBinaryAdapter().unmarshal(hexString);
 	}
-}
+
+	/**
+	 * Converts the byte array into a hexadecimal string representation. The
+	 * output string will not include the common "0x" prefix.
+	 * 
+	 * @param bytes
+	 *            The byte array to be converted
+	 * @return The hexadecimal string representation
+	 */
+	public static String bytesToHex(byte[] bytes) {
+		return new HexBinaryAdapter().marshal(bytes);
+	}
+}

src/main/java/edu/cmu/sv/arinc838/validation/DataValidator.java

@@ -21,6 +21,7 @@
 import edu.cmu.sv.arinc838.dao.IntegrityDefinitionDao.IntegrityType;
 import edu.cmu.sv.arinc838.dao.SoftwareDefinitionFileDao;
 import edu.cmu.sv.arinc838.dao.SoftwareDescriptionDao;
+import edu.cmu.sv.arinc838.util.Converter;
 
 /**
  * <p>
@@ -242,10 +243,10 @@ public byte[] validateFileFormatVersion(byte[] version) {
 		if (!Arrays.equals(version,
 				SoftwareDefinitionFileDao.DEFAULT_FILE_FORMAT_VERSION)) {
 			throw new IllegalArgumentException(
-					"File format version was set to "
-							+ version
-							+ ", expected "
-							+ SoftwareDefinitionFileDao.DEFAULT_FILE_FORMAT_VERSION);
+					"File format version was set to 0x"
+							+ Converter.bytesToHex(version)
+							+ ", expected 0x"
+							+ Converter.bytesToHex(SoftwareDefinitionFileDao.DEFAULT_FILE_FORMAT_VERSION));
 		}
 		return version;
 	}

src/test/java/edu/cmu/sv/arinc838/util/ConverterTest.java

@@ -10,5 +10,11 @@ public void hexToBytes() {
 		assertEquals(Converter.hexToBytes("DEADBEEF"), new byte[] { (byte) 222,
 				(byte) 173, (byte) 190, (byte) 239 });
 	}
+
+	@Test
+	public void bytesToHex() {
+		assertEquals(Converter.bytesToHex(new byte[] { (byte) 222,
+				(byte) 173, (byte) 190, (byte) 239 }), "DEADBEEF");
+	}
 
 }