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/*
 * $Id: SplashScreen.java 19191 2010-08-25 21:05:23Z tcarlson $
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.util;

import org.mule.api.MuleContext;

import java.util.ArrayList;
import java.util.List;

/**
 * Implements singleton pattern to allow different splash-screen implementations
 * following the concept of header, body, and footer. Header and footer are
 * reserved internally to Mule but body can be used to customize splash-screen
 * output. External code can e.g. hook into the start-up splash-screen as follows:
 * 
 *   SplashScreen splashScreen = SplashScreen.getInstance(ServerStartupSplashScreen.class);
 *   splashScreen.addBody("Some extra text");
 * 
 */
public abstract class SplashScreen
{
    protected List header = new ArrayList();
    protected List body = new ArrayList();
    protected List footer = new ArrayList();
    
    /**
     * Setting the header clears body and footer assuming a new
     * splash-screen is built.
     * 
     */
    final public void setHeader(MuleContext context)
    {
        header.clear();
        doHeader(context);
    }
    
    final public void addBody(String line)
    {
        doBody(line);
    }
    
    final public void setFooter(MuleContext context)
    {
        footer.clear();
        doFooter(context);
    }
    
    protected void doHeader(MuleContext context)
    {
        // default reserved for mule core info
    }   
    
    protected void doBody(String line)
    {
        body.add(line);
    }

    protected void doFooter(MuleContext context)
    {
        // default reserved for mule core info
    }    
    
    public String toString()
    {
        List boilerPlate = new ArrayList(header);
        boilerPlate.addAll(body);
        boilerPlate.addAll(footer);
        return StringMessageUtils.getBoilerPlate(boilerPlate, '*', 70);
    }
    
    protected SplashScreen()
    {
        // make sure no one else creates an instance
    }
}