Handle non supported JOOQ dialect

This commit uses a fallback translator if the JOOQ Dialect in use is not
one we support.

Closes spring-projectsgh-8521

Author: snicoll

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jooq/JooqExceptionTranslator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@
  * @author Lukas Eder
  * @author Andreas Ahlenstorf
  * @author Phillip Webb
+ * @author Stephane Nicoll
  */
 class JooqExceptionTranslator extends DefaultExecuteListener {
 
@@ -58,8 +59,10 @@ public void exception(ExecuteContext context) {
 	private SQLExceptionTranslator getTranslator(ExecuteContext context) {
 		SQLDialect dialect = context.configuration().dialect();
 		if (dialect != null && dialect.thirdParty() != null) {
-			return new SQLErrorCodeSQLExceptionTranslator(
-					dialect.thirdParty().springDbName());
+			String dbName = dialect.thirdParty().springDbName();
+			if (dbName != null) {
+				return new SQLErrorCodeSQLExceptionTranslator(dbName);
+			}
 		}
 		return new SQLStateSQLExceptionTranslator();
 	}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jooq/JooqExceptionTranslatorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -58,7 +58,8 @@ public static Object[] parameters() {
 				new Object[] { SQLDialect.POSTGRES, sqlException("03000") },
 				new Object[] { SQLDialect.POSTGRES_9_3, sqlException("03000") },
 				new Object[] { SQLDialect.POSTGRES_9_4, sqlException("03000") },
-				new Object[] { SQLDialect.POSTGRES_9_5, sqlException("03000") } };
+				new Object[] { SQLDialect.POSTGRES_9_5, sqlException("03000") },
+				new Object[] { SQLDialect.SQLITE, sqlException("21000") }};
 	}
 
 	private static SQLException sqlException(String sqlState) {