Regular Expression Problem in EventListener

Help / Discuss
1

Hello,

I have a problem when I tried to write an event listener(for DocumentCreatingEvent(), DocumentUpdatingEvent()) using Wiki Components.

method name: onEvent

The code is as follows

{{groovy}}

import java.util.regex.Pattern
import java.util.regex.Matcher

def docSource = xcontext.method.input.get(1)
def pattern = ~/\S+er\b/
def matcher = "My code is groovier and better when I use Groovy there" =~ pattern

docSource.setContent(matcher.find())

{{/groovy}}

When I updated my testing page, there was nothing printed in the page. However “true” should be expected.

Are there any suggestions?

2

Hello, what’s the desired outcome for you here? Do you want to update document with True statement as new content? If so - I don’t see the saving process - applying changes inside the provided code.

The patter from what I see is working, I added if/else statement for quick test and it returns Match found for me.

def pattern = ~/\S+er\b/
def matcher = "My code is groovier and better when I use Groovy there" =~ pattern

if (matcher.find()) {
   println("Match found.")
} else {
   println("No match found.")
}
3

As said, the “true” should be printed in my testing page, but it is not.

Saving follows the action of the event listener. It is not required here.

4

I knew why. It should be setContent(""+matcher.find()).

1 Like
5

Then why are using pattern.find()? You’re calling find method on string value, and if you look into official methods for String class StringGroovyMethods (Groovy 4.0.17) (groovy-lang.org), it expects either character, regex or pattern expression. If you want to find matches to your string it should be like this

def myPattern = ~/\S+er\b/
def myString = "My code is groovier and better when I use Groovy there"
println myString.find(myPattern)

Which will return groovier. If you expect a boolean statement, you shall use matcher.find()

6

The code above is just for testing. Before I begin to implement using regular expressions, I would like to know if it works.

As you pointed out, it should be matcher.find(). Thank you very much. I corrected the code above.

1 Like