code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // This library is free software; you can redistribute it and/or
  // modify it under the terms of the GNU Lesser General Public
  // License as published by the Free Software Foundation; either
  // version 2.1 of the License, or (at your option) any later version.
  //
  // This library is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  // Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public
  // License along with this library; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.puppycrawl.tools.checkstyle.internal.utils;
  
  import com.puppycrawl.tools.checkstyle.AuditEventFormatter;
  import com.puppycrawl.tools.checkstyle.api.AuditEvent;
  
  /**
   * Represents the formatter for log message which is used in UTs.
   * Message format is: filePath:lineNo:columnNo: message.
   */
  public class AuditEventUtFormatter implements AuditEventFormatter {
  
      /** Length of all separators. */
      private static final int LENGTH_OF_ALL_SEPARATORS = 4;
  
      @Override
      public String format(AuditEvent event) {
          final String fileName = event.getFileName();
          final String message = event.getMessage();
  
          // avoid StringBuffer.expandCapacity
          final int bufLen = event.getFileName().length() + event.getMessage().length()
              + LENGTH_OF_ALL_SEPARATORS;
          final StringBuilder sb = new StringBuilder(bufLen);
  
          sb.append(fileName).append(':').append(event.getLine());
          if (event.getColumn() > 0) {
              sb.append(':').append(event.getColumn());
          }
          sb.append(": ").append(message);
  
          return sb.toString();
      }
  
  }
  