Create a JPQL parser.

Introduce a grammar that supports JPQL as defined by JPA 3.1 and allow us to leverage it for query handling.

Related: #2814.

pom.xml

@@ -30,6 +30,7 @@
 		<source.level>16</source.level>
     <!-- AspectJ maven plugin can't handle 17 yet -->
 
+		<antlr>4.11.1</antlr>
 		<eclipselink>3.0.3</eclipselink>
 		<hibernate>6.1.4.Final</hibernate>
 		<hsqldb>2.7.1</hsqldb>

spring-data-jpa/pom.xml

@@ -73,6 +73,12 @@
 			</exclusions>
 		</dependency>
 
+		<dependency>
+			<groupId>org.antlr</groupId>
+			<artifactId>antlr4-runtime</artifactId>
+			<version>${antlr}</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.aspectj</groupId>
 			<artifactId>aspectjweaver</artifactId>
@@ -247,8 +253,8 @@
 		<plugins>
 
 			<!--
-			     Jacoco plugin redeclared to make sure it's downloaded and
-			     the agents can be explicitly added to the test executions.
+				 Jacoco plugin redeclared to make sure it's downloaded and
+				 the agents can be explicitly added to the test executions.
 			-->
 			<plugin>
 				<groupId>org.jacoco</groupId>
@@ -344,6 +350,45 @@
 				</executions>
 			</plugin>
 
+			<plugin>
+				<groupId>org.antlr</groupId>
+				<artifactId>antlr4-maven-plugin</artifactId>
+				<version>${antlr}</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>antlr4</goal>
+						</goals>
+						<phase>generate-sources</phase>
+						<configuration>
+							<visitor>true</visitor>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+
+			<plugin>
+				<groupId>com.google.code.maven-replacer-plugin</groupId>
+				<artifactId>maven-replacer-plugin</artifactId>
+				<version>1.4.1</version>
+				<executions>
+					<execution>
+						<phase>process-sources</phase>
+						<goals>
+							<goal>replace</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<includes>
+						<include>target/generated-sources/antlr4/**/*.java</include>
+					</includes>
+					<variableTokenValueMap>
+						public class=class,public interface=interface
+					</variableTokenValueMap>
+				</configuration>
+			</plugin>
+
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<executions>