/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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 */
package com.sun.appserv.management.util.stringifier;

/**
	Stringifies an object based on specified interfaces.
 */
public class InterfacesStringifier implements Stringifier
{
	private final StringifierRegistry	mRegistry;
	private final Class<?>[]				mInterfaces;
	
		public 
	InterfacesStringifier( Class[] interfaces  )
	{
		this( StringifierRegistryImpl.DEFAULT, interfaces );
	}
	
		public 
	InterfacesStringifier( StringifierRegistry registry, Class[] interfaces)
	{
		mRegistry	= registry;
		mInterfaces	= interfaces;
	}
	
		private <T> String
	stringifyAs( Object o, Class<T> theClass )
	{
		String	result	= null;
		if ( theClass.isAssignableFrom( o.getClass() ) )
		{
			final Stringifier	stringifier	= mRegistry.lookup( theClass );
			if ( stringifier != null )
			{
				result	= stringifier.stringify( o );
			}
		}
		return( result );
	}
	
		public String
	stringify( Object o )
	{
		String	result	= "";
		
		for( int i = 0; i < mInterfaces.length; ++i )
		{
			final Class<?> intf	= mInterfaces[ i ];
			
			final String s	= stringifyAs( o, intf );
			if ( s != null )
			{
				result	= result + intf.getName() + ": " + s + "\n";
			}
		}
		
		if ( result == null || result.length() == 0)
		{
			result	= o.toString();
		}
	
		return( result );
	}
}