intdecoder.java

Java Communicating Agents是一个用于开发网络反应式信息agent的框架

/*
 * $Source: /home/data/cvsroot/src/jacomma/icm/io/imp/IntDecoder.java,v $
 * $Revision: 1.3 $
 * $Date: 2000/10/28 20:09:07 $
 *
 * This file is part of the jacomma framework
 * Copyright (c) 2000 	Dimitrios Vyzovitis
 *			mailto:[e-mail]
 *			
 *
 *			
 *			
 *			
 *
 *	This library is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU Library General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This library is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU Library General Public License for more details.
 *
 *	You should have received a copy of the GNU Library General Public License
 *	along with this library; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, 
 *	Boston, MA  02111-1307  USA
 */

package jacomma.icm.io.imp;

import jacomma.icm.io.EncObject;
import jacomma.icm.io.EncObjectType;
import jacomma.icm.io.EncObjectDecoder;
import jacomma.icm.io.EncObjectSignature;

/**
 * TBA
 **/
public class IntDecoder extends DecoderTemplate {

	public IntDecoder() {
		all_.add( EncObjectType.Int );
	}

	public Object decode( EncObject obj, Object hint ) {
		// Expected hint: a string representing the type to use
		// Correspond to the *value() methods of java.lang.Number

		CacheKey key = new CacheKey( obj, hint );
		Number num = (Number)cache_.get( key );		
		if ( num == null ) {
			num = new java.math.BigInteger( (byte[])obj.getValue() );
			if ( hint != null ) try {
				num = (Number)num.getClass().getMethod( (String)hint + "Value", null )
					.invoke( num, null );
			} catch ( Exception exc ) {
				System.err.println( "Warning: " + toString() + ": Bad Hint" );
			}

			num = (Number)cache_.try_put( key, num );
		}
		
		return num;
		
	}

}