Filter with TokenFilter.DeleteCharacters produces Invalid filter specification

Old Forum Archive
1

Let’s imagine we have properties file with jdbc.url=${jdbc.url} As far as ReplaceTokens can’t operate on any tokens longer than 1 char ( {jdb.url} will work. Same with ${…} will not) we have to strip ‘$’ somehow. DeleteCharacters looks suitable but then I do

filter(TokenFilter.DeleteCharacters, chars: '\$')

it leads to

Caused by: org.gradle.api.InvalidUserDataException: Error - Invalid filter specification for org.apache.tools.ant.filters.TokenFilter$DeleteCharacters

Any ideas what is going on? Thanks

Ofc, I can replace this call by filter {line -> line.replace ‘abc’, ‘’} but looking for explanation.

2

TokenFilter.DeleteCharacters implements TokenFilter.Filter and gradle does not support this kind of filter. I think the expand() method can solve your problem. here’s an example:

task myCopy(type:Copy){
 from("test.properties")
 into("build")
 expand(jdbcUrl: "http://myCompany:8081/...")
}

regards, René

3

Thanks for answer, your approach works fine, just like mine.

4

maybe I phrased it badly. The problem is not that TokenFilter.DeleteCharacters implements TokenFilter.Filter, but that it does not extend from java.io.FilterReader. Have a look at the javadoc of the filter method for the details:

http://gradle.org/docs/current/javadoc/org/gradle/api/tasks/AbstractCopyTask.html#filter(java.lang.Class)

regards, René

5

Most stupid question ever. I read that FilterReader about 5 times, I knew that DeleteCharacter doesn’t inherit it and checked hierachy about 7 times but I was looking for interfaces only. It even didn’t came into my head that someone can use particular classes and not the interface to distinct the classes…

Thanks for explanation.

6

Can the TokenFilter class be used as wrapper???

Can someone help with the syntax? filter(TokenFilter (TokenFilter.ReplaceRegex , pattern: ~/lib/store/store/, replace: ‘lib/store/store.min’))