HHH-15745 Change string literal handling in HQL lexer

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlLexer.g4

@@ -75,9 +75,12 @@ HEX_LITERAL : '0' [xX] HEX_DIGIT+ LONG_SUFFIX?;
 fragment SINGLE_QUOTE : '\'';
 fragment DOUBLE_QUOTE : '"';
 
-STRING_LITERAL
-	: DOUBLE_QUOTE ( ESCAPE_SEQUENCE | DOUBLE_QUOTE DOUBLE_QUOTE | ~('"') )* DOUBLE_QUOTE
-	| SINGLE_QUOTE ( ESCAPE_SEQUENCE | SINGLE_QUOTE SINGLE_QUOTE | ~('\'') )* SINGLE_QUOTE
+STRING_LITERAL : SINGLE_QUOTE ( SINGLE_QUOTE SINGLE_QUOTE | ~('\'') )* SINGLE_QUOTE;
+
+JAVA_STRING_LITERAL
+	: DOUBLE_QUOTE ( ESCAPE_SEQUENCE | ~('"') )* DOUBLE_QUOTE
+ 	| [jJ] SINGLE_QUOTE ( ESCAPE_SEQUENCE | ~('\'') )* SINGLE_QUOTE
+ 	| [jJ] DOUBLE_QUOTE ( ESCAPE_SEQUENCE | ~('\'') )* DOUBLE_QUOTE
  	;
 
 fragment BACKSLASH : '\\';
@@ -96,6 +99,7 @@ UNICODE_ESCAPE
 
 BINARY_LITERAL
 	: [xX] SINGLE_QUOTE (HEX_DIGIT HEX_DIGIT)* SINGLE_QUOTE
+	| [xX] DOUBLE_QUOTE (HEX_DIGIT HEX_DIGIT)* DOUBLE_QUOTE
 	;
 
 // ESCAPE start tokens

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlParser.g4

@@ -665,7 +665,7 @@ inList
  * A single character used to escape the '_' and '%' wildcards in a 'like' pattern
  */
 likeEscape
-	: ESCAPE (STRING_LITERAL | parameter)
+	: ESCAPE (STRING_LITERAL | JAVA_STRING_LITERAL | parameter)
 	;
 
 
@@ -823,6 +823,7 @@ searchedCaseWhen
  */
 literal
 	: STRING_LITERAL
+	| JAVA_STRING_LITERAL
 	| NULL
 	| booleanLiteral
 	| numericLiteral

hibernate-core/src/main/java/org/hibernate/internal/util/QuotingHelper.java

@@ -74,7 +74,7 @@ public final class QuotingHelper {
 		final int end = text.length() - 1;
 		final char delimiter = text.charAt( 0 );
 		assert delimiter == text.charAt( end );
-		// Unescape the parsed literal and handle escape sequences
+		// Unescape the parsed literal
 		final StringBuilder sb = new StringBuilder( text.length() - 2 );
 		for ( int i = 1; i < end; i++ ) {
 			char c = text.charAt( i );
@@ -89,8 +89,26 @@ public final class QuotingHelper {
 						i++;
 					}
 					break;
-				case '\\':
-					if ( ( i + 1 ) < end ) {
+				default:
+					break;
+			}
+			sb.append( c );
+		}
+		return sb.toString();
+	}
+
+	public static String unquoteJavaStringLiteral(String text) {
+		assert text.length() > 1;
+		final char firstChar = text.charAt( 0 );
+		final int start = firstChar == 'j' || firstChar == 'J' ? 1 : 0;
+		final int end = text.length() - 1;
+		final char delimiter = text.charAt( start );
+		assert delimiter == text.charAt( end );
+		// Handle escape sequences
+		final StringBuilder sb = new StringBuilder( text.length() - ( start + 2 ) );
+		for ( int i = start + 1; i < end; i++ ) {
+			char c = text.charAt( i );
+			if ( c == '\\' && ( i + 1 ) < end ) {
 				char nextChar = text.charAt( ++i );
 				switch ( nextChar ) {
 					case 'b':
@@ -130,10 +148,6 @@ public final class QuotingHelper {
 						break;
 				}
 			}
-					break;
-				default:
-					break;
-			}
 			sb.append( c );
 		}
 		return sb.toString();

hibernate-core/src/main/java/org/hibernate/query/hql/internal/SemanticQueryBuilder.java

@@ -3275,6 +3275,8 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 		switch ( node.getSymbol().getType() ) {
 			case HqlParser.STRING_LITERAL:
 				return stringLiteral( node.getText() );
+			case HqlParser.JAVA_STRING_LITERAL:
+				return javaStringLiteral( node.getText() );
 			case HqlParser.INTEGER_LITERAL:
 				return integerOrLongLiteral( node.getText() );
 			case HqlParser.LONG_LITERAL:
@@ -3587,6 +3589,15 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 		);
 	}
 
+	private SqmLiteral<String> javaStringLiteral(String text) {
+		String unquoted = QuotingHelper.unquoteJavaStringLiteral( text );
+		return new SqmLiteral<>(
+				unquoted,
+				resolveExpressibleTypeBasic( String.class ),
+				creationContext.getNodeBuilder()
+		);
+	}
+
 	private SqmLiteral<byte[]> binaryLiteral(String text) {
 		return new SqmLiteral<>(
 				PrimitiveByteArrayJavaType.INSTANCE.fromString(

hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/LiteralTests.java

@@ -60,6 +60,17 @@ public class LiteralTests {
 		);
 	}
 
+	@Test
+	public void testJavaString(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					assertThat( session.createQuery( "select \"\\n\"" ).getSingleResult(), is( "\n" ) );
+					assertThat( session.createQuery( "select J'\\n'" ).getSingleResult(), is( "\n" ) );
+					assertThat( session.createQuery( "select J'\\''" ).getSingleResult(), is( "'" ) );
+				}
+		);
+	}
+
 	@Test
 	public void testJdbcTimeLiteral(SessionFactoryScope scope) {
 		scope.inTransaction(
@@ -315,6 +326,4 @@ public class LiteralTests {
 				}
 		);
 	}
-
-
 }