listreader.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/ListReader.java,v $
 * $Revision: 1.7 $
 * $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.EncObjectReader;

import java.util.ArrayList;

public class ListReader extends ReaderTemplate {

	ArrayList elements_;
	EncObjectReader anyrd_;

	public ListReader(){}

	public void start( java.io.InputStream stream ) 
		throws java.io.IOException {
		
		super.start( stream );
		
		anyrd_ = Registry.instance.getReader( EncObjectType.Any );
		elements_ = new ArrayList();
	}

	public void readNext() throws java.io.IOException {
		
		if ( !done_ ) {
			int next;
			if ( ((next = readNextByte()) & 0x0f) == 0x00 )
				done_ = true;
			else {
				for( anyrd_.start( stream_ ); anyrd_.hasNext(); anyrd_.readNext() );
				elements_.add( anyrd_.getObject() );
			}
		}

	}
	
	protected EncObject makeObject() {
		EncObject[] ar = new EncObject[elements_.size()];
		System.arraycopy( elements_.toArray(), 0, ar, 0, ar.length );
		
		return new EncObjectImp( EncObjectType.List, ar );
	}
	
	public boolean canHandle( EncObjectType t ) {
		return EncObjectType.List.equals( t );
	}

}