Dynamic instantiation variables (reflection)

[2006 IR Open Dicussion]

By: Alex - elninyomelon

Dynamic instantiation variables (reflection)

2006-05-04 02:03

Hello

 

I want to instantiate one variable or another of report in Textfield expression depending on a parameter value. For example:

 

I have thre variables in my report:

var1

var2

var3

 

I have one parameter "num_var" in my report.

If num_var=1 I want to instantiate var1

If num_var=2 I want to instantiate var2

If num_var=3 I want to instantiate var3

 

I want to do it without conditionals expressions (...?...:...) because report contains a lot of variables.

 

Is it possible?

 

 

Thanks in advance

 

 

 

 

 

 

 

 

By: Alex - elninyomelon

please help me!!!!

2006-05-09 13:35

please help me!!!!

 

 

 

 

 

 

By: Lucian Chirita - lucianc

RE: Dynamic instantiation variables (reflecti

2006-05-10 05:21

You can achieve reflection via the scriptlet object:

$P{REPORT_SCRIPTLET}.getVariableValue("var" + $P{num_var})

 

Note that you would need to cast the value back to the varx type as getVariableValue() returns Object.

 

HTH,

Lucian

 

 

 

 

By: Alex - elninyomelon

RE: Dynamic instantiation variables (reflection)

2006-05-10 13:39

Thanks a lot Lucian.