feat: translate HEX to Unicode String and ByteArray String

Signed-off-by: Andreas Reichel <andreas@manticore-projects.com>

src/main/java/net/sf/jsqlparser/expression/HexValue.java

@@ -11,6 +11,8 @@
 
 import net.sf.jsqlparser.parser.ASTNodeAccessImpl;
 
+import java.nio.charset.StandardCharsets;
+
 public class HexValue extends ASTNodeAccessImpl implements Expression {
 
  private String value;
@@ -61,4 +63,31 @@ public Long getLong() {
  public LongValue getLongValue() {
  return new LongValue(getLong());
  }
+
+ public static byte[] hexStringToByteArray(String s) {
+ int len = s.length();
+ byte[] data = new byte[len / 2];
+ for (int i = 0; i < len; i += 2) {
+ data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ + Character.digit(s.charAt(i + 1), 16));
+ }
+ return data;
+ }
+
+ // `X'C3BC'` --> `'ü'`
+ public StringValue getStringValue() {
+ return new StringValue(
+ new String(hexStringToByteArray(getDigits()), StandardCharsets.UTF_8));
+ }
+
+ // `X'C3BC'` --> `\xC3\xBC`
+ public StringValue getBlob() {
+ StringBuilder builder = new StringBuilder();
+ String digits = getDigits();
+ int len = digits.length();
+ for (int i = 0; i < len; i += 2) {
+ builder.append("\\x").append(digits.charAt(i)).append(digits.charAt(i + 1));
+ }
+ return new StringValue(builder.toString());
+ }
 }

src/test/java/net/sf/jsqlparser/expression/HexValueTest.java

@@ -19,7 +19,7 @@ class HexValueTest {
 
  @Test
  void testHexCode() throws JSQLParserException {
- String sqlString = "SELECT 0xF001, X'00A1'";
+ String sqlString = "SELECT 0xF001, X'00A1', X'C3BC'";
  PlainSelect select = (PlainSelect) CCJSqlParserUtil.parse(sqlString);
 
  HexValue hex1 = (HexValue) select.getSelectItem(0).getExpression();
@@ -31,5 +31,12 @@ void testHexCode() throws JSQLParserException {
  Assertions.assertEquals("00A1", hex2.getDigits());
  Assertions.assertEquals(161, hex2.getLong());
  Assertions.assertEquals(161, hex2.getLongValue().getValue());
+
+ HexValue hex3 = (HexValue) select.getSelectItem(2).getExpression();
+ Assertions.assertEquals("C3BC", hex3.getDigits());
+ Assertions.assertEquals("'ü'", hex3.getStringValue().toString());
+ Assertions.assertEquals("ü", hex3.getStringValue().getValue());
+
+ Assertions.assertEquals("'\\xC3\\xBC'", hex3.getBlob().toString());
  }
 }