Unable to add custom check for non-java files to Checker module

Hi,

I am trying to create a custom check for non-java files. 

This is my check:

package com.mycompany.checks;

import com.puppycrawl.tools.checkstyle.api.Check;

	public class EmptyLineCheck extends Check {

	private int maxLines = 0;

	public void setMaxLines(int maxLines) { 
		this.maxLines = maxLines; 
	}

	public int[] getDefaultTokens() {
		return new int[0];
	}

  	public void beginTree(DetailAST detailAst) {
		String[] lines = getLines();
		int count = 0;
		for (int i=0; i= maxLines){
				    int l = i-count;
					log(l, "Too many empty lines: Line "+l);					
				}
			}
		}
	}

}


and my config file:


	
	
	



When this check is added as a submodule of TreeWalker module in the config
file, it works fine (for java files of course).

In order to apply it to non-java files, when I try to define it as a
submodule of Checker module (i.e outside the Treewalker), I am getting the
following exception:

Unable to create Checker: cannot initialize module
com.mycompany.checks.EmptyLineC
heck - com.mycompany.checks.EmptyLineCheck is not allowed as a child in
Checker
com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize
modul
e com.mycompany.checks.EmptyLineCheck - com.mycompany.checks.EmptyLineCheck
is not a
llowed as a child in Checker
        at
com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:177)
        at
com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(Automatic
Bean.java:207)
        at com.puppycrawl.tools.checkstyle.Main.createChecker(Main.java:138)
        at com.puppycrawl.tools.checkstyle.Main.main(Main.java:115)
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException:
com.mycompany.
checks.EmptyLineCheck is not allowed as a child in Checker
        at
com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:171)

Is it not allowed to add custom modules directly to Checker module? If not,
how to add this module so that it can be used for any file?


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