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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.
 */
package org.codehaus.groovy.control.messages;

import org.codehaus.groovy.control.Janitor;
import org.codehaus.groovy.control.ProcessingUnit;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.syntax.SyntaxException;

import java.io.PrintWriter;



/**
 *  A base class for compilation messages.
 *
 *  @author Chris Poirier
 */

public abstract class Message
{
    
    
   /**
    *  Writes the message to the specified PrintWriter.  The supplied
    *  ProcessingUnit is the unit that holds this Message.
    */
    
    public abstract void write( PrintWriter writer, Janitor janitor );
    
    
   /**
    *  A synonym for write( writer, owner, null ).
    */
    
    public final void write( PrintWriter writer)
    {
        write( writer,  null );
    }
    
    
    
  //---------------------------------------------------------------------------
  // FACTORY METHODS
    
    
   /**
    *  Creates a new Message from the specified text.
    */
    
    public static Message create( String text, ProcessingUnit owner )
    {
        return new SimpleMessage( text, owner );
    }
    
    
          
   /**
    *  Creates a new Message from the specified text.
    */
     
    public static Message create( String text, Object data, ProcessingUnit owner  )
    {
        return new SimpleMessage( text, data, owner);
    }
     
     
           
   /**
    *  Creates a new Message from the specified SyntaxException.
    */
      
    public static Message create( SyntaxException error, SourceUnit owner )
    {
        return new SyntaxErrorMessage( error, owner );
    }
      
    
      
    
}