/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.lucene.analysis.it;


/* 
 * This algorithm is updated based on code located at:
 * http://members.unine.ch/jacques.savoy/clef/
 * 
 * Full copyright for that code follows:
 */

/*
 * Copyright (c) 2005, Jacques Savoy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this 
 * list of conditions and the following disclaimer. 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. Neither the name of the author nor the names 
 * of its contributors may be used to endorse or promote products derived from 
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS 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 COPYRIGHT HOLDER OR 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.
 */

Light Stemmer for Italian.

This stemmer implements the algorithm described in: Report on CLEF-2001 Experiments Jacques Savoy

/** * Light Stemmer for Italian. * <p> * This stemmer implements the algorithm described in: * <i>Report on CLEF-2001 Experiments</i> * Jacques Savoy */
public class ItalianLightStemmer { public int stem(char s[], int len) { if (len < 6) return len; for (int i = 0; i < len; i++) switch(s[i]) { case 'à': case 'á': case 'â': case 'ä': s[i] = 'a'; break; case 'ò': case 'ó': case 'ô': case 'ö': s[i] = 'o'; break; case 'è': case 'é': case 'ê': case 'ë': s[i] = 'e'; break; case 'ù': case 'ú': case 'û': case 'ü': s[i] = 'u'; break; case 'ì': case 'í': case 'î': case 'ï': s[i] = 'i'; break; } switch(s[len-1]) { case 'e': if (s[len-2] == 'i' || s[len-2] == 'h') return len - 2; else return len - 1; case 'i': if (s[len-2] == 'h' || s[len-2] == 'i') return len - 2; else return len - 1; case 'a': if (s[len-2] == 'i') return len - 2; else return len - 1; case 'o': if (s[len-2] == 'i') return len - 2; else return len - 1; } return len; } }