HHH-18754 improve HQLParser's error listener usage in StandardHqlTranslator

Author: nathan.xu

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

@@ -4,8 +4,6 @@
  */
 package org.hibernate.query.hql.internal;
 
-import java.util.BitSet;
-
 import org.antlr.v4.runtime.CommonToken;
 import org.antlr.v4.runtime.InputMismatchException;
 import org.antlr.v4.runtime.NoViableAltException;
@@ -29,13 +27,11 @@
 
 import org.antlr.v4.runtime.ANTLRErrorListener;
 import org.antlr.v4.runtime.BailErrorStrategy;
+import org.antlr.v4.runtime.BaseErrorListener;
 import org.antlr.v4.runtime.DefaultErrorStrategy;
-import org.antlr.v4.runtime.Parser;
 import org.antlr.v4.runtime.RecognitionException;
 import org.antlr.v4.runtime.Recognizer;
-import org.antlr.v4.runtime.atn.ATNConfigSet;
 import org.antlr.v4.runtime.atn.PredictionMode;
-import org.antlr.v4.runtime.dfa.DFA;
 import org.antlr.v4.runtime.misc.ParseCancellationException;
 
 import static java.util.stream.Collectors.toList;
@@ -50,7 +46,6 @@ public class StandardHqlTranslator implements HqlTranslator {
 	private final SqmCreationContext sqmCreationContext;
 	private final SqmCreationOptions sqmCreationOptions;
 
-
 	public StandardHqlTranslator(
 			SqmCreationContext sqmCreationContext,
 			SqmCreationOptions sqmCreationOptions) {
@@ -101,30 +96,9 @@ private HqlParser.StatementContext parseHql(String hql) {
 		// Build the parse tree
 		final HqlParser hqlParser = HqlParseTreeBuilder.INSTANCE.buildHqlParser( hql, hqlLexer );
 
-		ANTLRErrorListener errorListener = new ANTLRErrorListener() {
-			@Override
-			public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
-				throw new SyntaxException( prettifyAntlrError( offendingSymbol, line, charPositionInLine, msg, e, hql, true ), hql );
-			}
-
-			@Override
-			public void reportAmbiguity(Parser recognizer, DFA dfa, int startIndex, int stopIndex, boolean exact, BitSet ambigAlts, ATNConfigSet configs) {
-			}
-
-			@Override
-			public void reportAttemptingFullContext(Parser recognizer, DFA dfa, int startIndex, int stopIndex, BitSet conflictingAlts, ATNConfigSet configs) {
-			}
-
-			@Override
-			public void reportContextSensitivity(Parser recognizer, DFA dfa, int startIndex, int stopIndex, int prediction, ATNConfigSet configs) {
-			}
-		};
-
 		// try to use SLL(k)-based parsing first - its faster
-		hqlLexer.addErrorListener( errorListener );
 		hqlParser.getInterpreter().setPredictionMode( PredictionMode.SLL );
 		hqlParser.removeErrorListeners();
-		hqlParser.addErrorListener( errorListener );
 		hqlParser.setErrorHandler( new BailErrorStrategy() );
 
 		try {
@@ -139,6 +113,14 @@ public void reportContextSensitivity(Parser recognizer, DFA dfa, int startIndex,
 			hqlParser.getInterpreter().setPredictionMode( PredictionMode.LL );
 			hqlParser.setErrorHandler( new DefaultErrorStrategy() );
 
+			final ANTLRErrorListener errorListener = new BaseErrorListener() {
+				@Override
+				public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
+					throw new SyntaxException( prettifyAntlrError( offendingSymbol, line, charPositionInLine, msg, e, hql, true ), hql );
+				}
+			};
+			hqlParser.addErrorListener( errorListener );
+
 			return hqlParser.statement();
 		}
 		catch ( ParsingException ex ) {

tooling/metamodel-generator/src/main/java/org/hibernate/processor/validation/Validation.java

@@ -120,10 +120,10 @@ private static SemanticQueryBuilder<?> createSemanticQueryBuilder(
 	private static HqlParser.StatementContext parseAndCheckSyntax(String hql, Handler handler) {
 		final HqlLexer hqlLexer = HqlParseTreeBuilder.INSTANCE.buildHqlLexer( hql );
 		final HqlParser hqlParser = HqlParseTreeBuilder.INSTANCE.buildHqlParser( hql, hqlLexer );
-		hqlLexer.addErrorListener( handler );
+
 		hqlParser.getInterpreter().setPredictionMode( PredictionMode.SLL );
 		hqlParser.removeErrorListeners();
-		hqlParser.addErrorListener( handler );
+
 		hqlParser.setErrorHandler( new BailErrorStrategy() );
 
 		try {
@@ -137,6 +137,7 @@ private static HqlParser.StatementContext parseAndCheckSyntax(String hql, Handle
 			// fall back to LL(k)-based parsing
 			hqlParser.getInterpreter().setPredictionMode( PredictionMode.LL );
 			hqlParser.setErrorHandler( new DefaultErrorStrategy() );
+			hqlParser.addErrorListener( handler );
 
 			return hqlParser.statement();
 		}