package org.apache.lucene.analysis.fr;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2004 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 apache@apache.org.
 *
 * 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
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * 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 org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import java.io.IOException;
import java.util.Hashtable;
import java.util.HashSet;
import java.util.Set;

/**
 * A filter that stemms french words. It supports a table of words that should
 * not be stemmed at all. The used stemmer can be changed at runtime after the
 * filter object is created (as long as it is a FrenchStemmer).
 *
 * @author    Patrick Talbot (based on Gerhard Schwarz work for German)
 */
public final class FrenchStemFilter extends TokenFilter {

	/**
	 * The actual token in the input stream.
	 */
	private Token token = null;
	private FrenchStemmer stemmer = null;
	private Set exclusions = null;

	public FrenchStemFilter( TokenStream in ) {
    super(in);
		stemmer = new FrenchStemmer();
	}

	/**
	 * Builds a FrenchStemFilter that uses an exclusiontable.
   *
   * @deprecated
	 */
	public FrenchStemFilter( TokenStream in, Hashtable exclusiontable ) {
		this( in );
		exclusions = new HashSet(exclusiontable.keySet());
	}

	public FrenchStemFilter( TokenStream in, Set exclusiontable ) {
		this( in );
		exclusions = exclusiontable;
	}

	/**
	 * @return  Returns the next token in the stream, or null at EOS
	 */
	public final Token next()
		throws IOException {
		if ( ( token = input.next() ) == null ) {
			return null;
		}
		// Check the exclusiontable
		else if ( exclusions != null && exclusions.contains( token.termText() ) ) {
			return token;
		}
		else {
			String s = stemmer.stem( token.termText() );
			// If not stemmed, dont waste the time creating a new token
			if ( !s.equals( token.termText() ) ) {
				return new Token( s, 0, s.length(), token.type() );
			}
			return token;
		}
	}
	/**
	 * Set a alternative/custom FrenchStemmer for this filter.
	 */
	public void setStemmer( FrenchStemmer stemmer ) {
		if ( stemmer != null ) {
			this.stemmer = stemmer;
		}
	}
	/**
	 * Set an alternative exclusion list for this filter.
	 */
	public void setExclusionTable( Hashtable exclusiontable ) {
		exclusions = new HashSet(exclusiontable.keySet());
	}
}



@@ -4389,17 +4389,19 @@
  ) %7B%0A%09%09%09
-%09
+   
 return n
@@ -4417,19 +4417,44 @@
  s, 
-0, s.length
+token.startOffset(), token.endOffset
 (), 
@@ -4465,17 +4465,16 @@
 n.type()
- 
 );%0A%09%09%09%7D%0A

Fix token offsets. Contributed by boblannoy <at> tiscali <dot> be