code: /**
   *   Copyright (c) Rich Hickey. All rights reserved.
   *   The use and distribution terms for this software are covered by the
   *   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
   *   which can be found in the file epl-v10.html at the root of this distribution.
   *   By using this software in any fashion, you are agreeing to be bound by
   * 	 the terms of this license.
   *   You must not remove this notice, or any other, from this software.
   **/
  
  /* rich May 25, 2009 */
  
  package clojure.lang;
  
  final public class ChunkedCons extends ASeq implements IChunkedSeq{
  
  private static final long serialVersionUID = 2773920188566401743L;
  
  final IChunk chunk;
  final ISeq _more;
  
  ChunkedCons(IPersistentMap meta, IChunk chunk, ISeq more){
  	super(meta);
  	this.chunk = chunk;
  	this._more = more;
  }
  
  public ChunkedCons(IChunk chunk, ISeq more){
  	this(null,chunk, more);
  }
  
  public Obj withMeta(IPersistentMap meta){
  	if(meta != _meta)
  		return new ChunkedCons(meta, chunk, _more);
  	return this;
  }
  
  public Object first(){
  	return chunk.nth(0);
  }
  
  public ISeq next(){
  	if(chunk.count() > 1)
  		return new ChunkedCons(chunk.dropFirst(), _more);
  	return chunkedNext();
  }
  
  public ISeq more(){
  	if(chunk.count() > 1)
  		return new ChunkedCons(chunk.dropFirst(), _more);
  	if(_more == null)
  		return PersistentList.EMPTY;
  	return _more;
  }
  
  public IChunk chunkedFirst(){
  	return chunk;
  }
  
  public ISeq chunkedNext(){
  	return chunkedMore().seq();	
  }
  
  public ISeq chunkedMore(){
  	if(_more == null)
  		return PersistentList.EMPTY;
  	return _more;
  }
  }
  