xfileiterator.java

Abstract The Lucene Server project is an attempt to extend the Jakarta Lucene tool with server ca

package org.apache.lucene.server;
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache Lucene" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    "Apache Lucene", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import java.util.Iterator;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.lucene.server.exceptions.XFileException;

/**
 * @author rcocula
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
class XFileIterator implements Iterator 
{
	private Vector files = new Vector();
	private Vector directories = new Vector();
	
	/**
	 * 
	 * @param xf
	 * @throws XFileException
	 */
	public XFileIterator(XFile xf) throws XFileException
	{
		addFiles(xf);
	}
	
	public XFileIterator(XFile path,Pattern pat) throws XFileException
	{
		XFile[] list = path.listXFiles();
		try 
		{
			for (int i=0;;i++)
			{
				Matcher m = pat.matcher(list[i].getName());
				if (m.matches())
				{
					if (list[i].isXFile())
					{
						addFiles(list[i]);
					}
				}
			}
		} 
		catch (ArrayIndexOutOfBoundsException e) 
		{
		}
	}
	
	
	/**
	 * 
	 */
	
	private void addFiles(XFile xf) throws XFileException
	{
		if (xf.isXDirectory())
		{
			XFile[] list = xf.listXFiles();
			try 
			{
			for (int i=0;;i++)
				{
					if (list[i].isXDirectory())
					{
						directories.add(list[i]);
					}
					else
					{
						files.add(list[i]);						
					}
				}
			}
			catch (ArrayIndexOutOfBoundsException e)
			{
			}
		}
		else 
		{
			files.add(xf);
		}		
	}
	
	/* (non-Javadoc)
	 * @see java.util.Iterator#remove()
	 */
	public void remove() 
	{
		// TODO Auto-generated method stub
	}
	/* (non-Javadoc)
	 * @see java.util.Iterator#hasNext()
	 */
	public boolean hasNext() 
	{
		return (files.size()+directories.size() != 0);
	}
	/* (non-Javadoc)
	 * @see java.util.Iterator#next()
	 */
	public Object next()
	{
		while (files.size() == 0)
		{
			try 
			{
				addFiles((XFile)directories.remove(0));
			} 
			catch (XFileException e) 
			{
				e.printStackTrace();
			}
		}
		return files.remove(0);
		
	}
}