Pentaho水壶的Java表达式

Question

I m in a precarious situation. I am looking for a 'JAVA EXPRESSION' for replacing a defined 'place-holder' in kettle.

My incoming string A is

<consumers>
 ?place-holder?
</consumers>

My incoming string Y is

<consumer>
   <info>X</info> 
 </consumer> 

After substitution the final output must be

<consumers>
   <consumer>
     <info>X</info>
   </consumer>  
</consumers>

Basically I am substituting ?place-holder? in 'String A' with 'String B'.

Actually the data's volume is extremely high and hence 'javascript', 'calculator' & 'replace in string' and all other options that I have tried is pathetic in performance.

I have read that 'Java expressions' are high in performance. Somehow, I am not able to come up with the expression.

Any help!

Answer 1

Try it out. Self explained picture below

Don't forget to check with java doc to string what expression does actually.

Replaces each substring of this string that matches the