topic Re: Switch on String in tJava in Talend Studio

Switch on String in tJava

Anonymous — Thu, 22 Jan 2015 14:11:09 GMT

Hello,
While using the tJava component we have an error when switching on a String:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
	Cannot switch on a value of type String. Only convertible int values or enum constants are permitted

Talend is however configured to use a Java 7 JRE:

How is that possible ?
Kind regards,
Ivan.

Re: Switch on String in tJava

Anonymous — Thu, 22 Jan 2015 14:15:57 GMT

Hi
It is a compilation error, can you show us the Java code on tJava component?
Shong

Re: Switch on String in tJava

Anonymous — Fri, 23 Jan 2015 09:03:01 GMT

Hi,
Here is the code.
I can't seem to add a screenshot though. It shows on my upload list and the editor but not in the final post.

switch (input_row.TYPE) {
	case "A" :
		context.table = "a";
		break;
	case "B" :
		context.table = "b";
		break;
	case "C" :
		context.table = "b";
		break;
	case "D" :
		context.table = "c";
		break;
	case "E" :
		context.table = "d";
		break;
	default :
		throw new IllegalArgumentException("Unknown truncate action !");
}

And the error message :

Starting job a at 09:53 23/01/2015.
 connecting to socket on port 3837
 connected
Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
	Cannot switch on a value of type String. Only convertible int values or enum constants are permitted
	at a.b.c.tFileInputDelimited_1Process(c.java:589)
	at a.b.c.runJobInTOS(c.java:914)
	at a.b.c.main(c.java:757)
Job a ended at 09:53 23/01/2015.

Kind regards,
Ivan.

Re: Switch on String in tJava

Anonymous — Mon, 26 Jan 2015 02:20:23 GMT

Hi
It is a basic Java issue, you can't use string type in switch statement expression with your JDK version, see
http://stackoverflow.com/questions/6231907/java-7-switch-statement-with-strings-not-working
http://stackoverflow.com/questions/338206/why-cant-i-switch-on-a-string
Best regards
Shong