se.vandmo.textchecker.maven.fixers.RemoveTrailingWhitespaceOnNonBlankLines Maven / Gradle / Ivy

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Maven plugin that checks that text files adheres to certain rules.

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package se.vandmo.textchecker.maven.fixers;

import static se.vandmo.textchecker.maven.rules.NoTrailingWhitespaceOnNonBlankLines.ENDS_WITH_WHITESPACE;
import static se.vandmo.textchecker.maven.rules.NoTrailingWhitespaceOnNonBlankLines.isOk;

import java.util.regex.Matcher;

import se.vandmo.textchecker.maven.Content;
import se.vandmo.textchecker.maven.ContentType;
import se.vandmo.textchecker.maven.Fixer;


public final class RemoveTrailingWhitespaceOnNonBlankLines implements Fixer {

  @Override
  public void fix(Content content) {
    content.modifyLines((line) -> {
      return possiblyFixLine(line, content.type());
    });
  }

  private String possiblyFixLine(String line, ContentType contentType) {
    if (isOk(line, contentType)) {
      return line;
    }
    Matcher matcher = ENDS_WITH_WHITESPACE.matcher(line);
    if (!matcher.matches()) {
      return line;
    }
    return matcher.group("beforetrailing");
  }

}