CODEWITHSUNDEEP
templatesgroovy
BTakacs
BTakacs

Reputation: 2427

Parsing properties files in groovy where keys contain dot (.) and use as templating binding

This is pretty common in Java-world having properties files with dot (.) in the key. Maven and Gradle solves this problem naturally but now I need to do this in plain groovy:

def propertiesFileContent = 'a.b=http://my.com/test'
def templateContent = 'Testing ${a.b} '

def props = new Properties()
props.load(new StringReader(propertiesFileContent))
def template = new groovy.text.SimpleTemplateEngine().createTemplate(templateContent)
println template.make(props)

The above code throws exception because the template engine threats ${a.b} as 'b' field of the 'a' object and do not accept 'a.b=http://my.com/test' to substitute. First I thought it is a bug in groovy templating but now it seems that this is a well-known limitation, and everybody suggests solutions that needs the modification of the template:

I'm in a situation where I should do this without the chance to modify the properties file or the template itself: they are in TAGged and released version of the application :-( Is there a solution or workaround if those are not possible? (I tried to use FreeMarker templating but facing the same issue)

Upvotes: 1

Views: 1148

Answers (1)

Dany
Dany

Reputation: 1530

Take a look at groovy.util.ConfigSlurper#parse(java.util.Properties). Usage: 

template.make(new ConfigSlurper().parse(props))

template.make() expects an object containing template properties, for example: 

[a: [b: 'http://my.com/test']]

ConfigSlurper does exactly what is needed converting Properties instance to such an object.

Upvotes: 3

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