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ModelCC is a model-based parser generator (a.k.a. compiler compiler) that decouples language specification from language processing, avoiding some of the problems caused by grammar-driven parser generators. ModelCC receives a conceptual model as input, along with constraints that annotate it. It is then able to create a parser for the desired textual language and the generated parser fully automates the instantiation of the language conceptual model. ModelCC also includes a built-in reference resolution mechanism that results in abstract syntax graphs, rather than mere abstract syntax trees.

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/*
 * ModelCC, distributed under ModelCC Shared Software License, www.modelcc.org
 */
package org.modelcc;

import java.util.Collections;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.modelcc.io.log.Message;
import org.modelcc.io.log.MessageLogger;

/**
 * ModelCC process
 * 
 * @author Fernando Berzal ([email protected])
 */
public abstract class ModelCCProcess 
{
    /**
	 * Logger.
	 */
	private MessageLogger logger;

	/**
	 * Log message
	 * @param level Warning level
	 * @param string Message
	 * @param object Message objects
	 */
	public final void log(Level level, String string, Object[] object) 
	{
		if (logger==null)
			logger = new MessageLogger();
		
	    logger.log(level,string,object);
	    Logger.getLogger(this.getClass().getName()).log(level,string,object);
	}

	/**
	 * Log message
	 * @param level Warning level
	 * @param message Exception message
	 * @param exception Source exception
	 */
	public final void log(Level level, String message, Exception exception) 
	{
		if (logger==null)
			logger = new MessageLogger();
		
	    logger.log(level,message,exception);
	    Logger.getLogger(this.getClass().getName()).log(level,message,exception);
	}

	/**
	 * Retrieve messages
	 * @return the message list
	 */
	public final List getMessages() 
	{
		if (logger!=null)
			return Collections.unmodifiableList(logger.getMessages());
		else
			return Collections.EMPTY_LIST;
	}
	
	
	/**
	 * Clear logged messages
	 */
	public final void clearMessages()
	{
		if (logger!=null)
			logger.clear();
	}
}