[#1744] Fix bug when updating with RowId

Related to Hibernate ORM issue [HHH-17045](https://hibernate.atlassian.net/browse/HHH-17045):
Unable to locate parameter for RESTRICT - UPDATE error when updating entity with RowId

Author: DavideD

hibernate-reactive-core/src/main/java/org/hibernate/reactive/adaptor/impl/PreparedStatementAdaptor.java

@@ -275,7 +275,7 @@ public ParameterMetaData getParameterMetaData() {
 
 	@Override
 	public void setRowId(int parameterIndex, RowId x) {
-		throw new UnsupportedOperationException();
+		put( parameterIndex, Buffer.buffer( x.getBytes() ) );
 	}
 
 	@Override

hibernate-reactive-core/src/main/java/org/hibernate/reactive/adaptor/impl/ResultSetAdaptor.java

@@ -30,6 +30,7 @@
 import java.util.Calendar;
 import java.util.Map;
 import java.util.NoSuchElementException;
+import java.util.Objects;
 import java.util.function.Function;
 
 import org.hibernate.engine.jdbc.BlobProxy;
@@ -847,12 +848,31 @@ public SQLXML getSQLXML(String columnLabel) {
 
 	@Override
 	public RowId getRowId(int columnIndex) {
-		throw new UnsupportedOperationException();
+		Buffer buffer = row.getBuffer( columnIndex - 1 );
+		wasNull = buffer == null;
+		return wasNull ? null : new RowIdAdaptor( buffer );
 	}
 
 	@Override
 	public RowId getRowId(String columnLabel) {
-		throw new UnsupportedOperationException();
+		Buffer buffer = row.getBuffer( columnLabel );
+		wasNull = buffer == null;
+		return wasNull ? null : new RowIdAdaptor( buffer );
+	}
+
+	private static class RowIdAdaptor implements RowId {
+
+		private final Buffer buffer;
+
+		private RowIdAdaptor(Buffer buffer) {
+			Objects.requireNonNull( buffer );
+			this.buffer = buffer;
+		}
+
+		@Override
+		public byte[] getBytes() {
+			return buffer.getBytes();
+		}
 	}
 
 	@Override

hibernate-reactive-core/src/main/java/org/hibernate/reactive/sql/results/graph/entity/internal/ReactiveEntityFetchJoinedImpl.java

@@ -29,6 +29,7 @@ protected Initializer buildEntityJoinedFetchInitializer(
 			LockMode lockMode,
 			NotFoundAction notFoundAction,
 			DomainResult<?> keyResult,
+			DomainResult<Object> rowIdResult,
 			Fetch identifierFetch,
 			Fetch discriminatorFetch,
 			AssemblerCreationState creationState) {
@@ -39,6 +40,7 @@ protected Initializer buildEntityJoinedFetchInitializer(
 				lockMode,
 				notFoundAction,
 				keyResult,
+				rowIdResult,
 				identifierFetch,
 				discriminatorFetch,
 				creationState

hibernate-reactive-core/src/main/java/org/hibernate/reactive/sql/results/graph/entity/internal/ReactiveEntityJoinedFetchInitializer.java

@@ -46,6 +46,7 @@ public ReactiveEntityJoinedFetchInitializer(
 			LockMode lockMode,
 			NotFoundAction notFoundAction,
 			DomainResult<?> keyResult,
+			DomainResult<Object> rowIdResult,
 			Fetch identifierFetch,
 			Fetch discriminatorFetch,
 			AssemblerCreationState creationState) {
@@ -55,7 +56,7 @@ public ReactiveEntityJoinedFetchInitializer(
 				lockMode,
 				identifierFetch,
 				discriminatorFetch,
-				null,
+				rowIdResult,
 				creationState
 		);
 		this.referencedFetchable = referencedFetchable;