package net.sf.logdistiller.util;
   
   /*
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import java.text.ParseException;
  
  import net.sf.logdistiller.LogEvent;
  
  /**
   * A helper to build log events and properly report parsing errors.
   * 
   * @since 1.2
   */
  public abstract class LogEventBuilder
  {
      protected abstract LogEvent newEvent( LogEvent.Factory factory, String curLine, Object... objects )
          throws ParseException;
  
      public LogEvent buildLogEvent( LogEvent.Factory factory, int lineNumber, String curLine, Object... objects )
      {
          try
          {
              return newEvent( factory, curLine, objects );
          }
          catch ( ParseException pe )
          {
              throw newRuntimeException( lineNumber, curLine, pe );
          }
          catch ( RuntimeException re )
          {
              throw newRuntimeException( lineNumber, curLine, re );
          }
      }
  
      private RuntimeException newRuntimeException( int lineNumber, String curLine, Throwable t )
      {
          String message;
          if ( lineNumber > 0 )
          {
              message = "error while parsing line #" + lineNumber + " '" + curLine + "'";
          }
          else
          {
              message = "error while parsing '" + curLine + "'";
          }
  
          return new RuntimeException( message, t );
      }
  }