| /* |
| * 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.sv; |
| |
| |
| /* |
| * 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. |
| */ |
| |
| import static org.apache.lucene.analysis.util.StemmerUtil.*; |
| |
| /** |
| * Light Stemmer for Swedish. |
| * <p> |
| * This stemmer implements the algorithm described in: |
| * <i>Report on CLEF-2003 Monolingual Tracks</i> |
| * Jacques Savoy |
| */ |
| public class SwedishLightStemmer { |
| |
| public int stem(char s[], int len) { |
| if (len > 4 && s[len-1] == 's') |
| len--; |
| |
| if (len > 7 && |
| (endsWith(s, len, "elser") || |
| endsWith(s, len, "heten"))) |
| return len - 5; |
| |
| if (len > 6 && |
| (endsWith(s, len, "arne") || |
| endsWith(s, len, "erna") || |
| endsWith(s, len, "ande") || |
| endsWith(s, len, "else") || |
| endsWith(s, len, "aste") || |
| endsWith(s, len, "orna") || |
| endsWith(s, len, "aren"))) |
| return len - 4; |
| |
| if (len > 5 && |
| (endsWith(s, len, "are") || |
| endsWith(s, len, "ast") || |
| endsWith(s, len, "het"))) |
| return len - 3; |
| |
| if (len > 4 && |
| (endsWith(s, len, "ar") || |
| endsWith(s, len, "er") || |
| endsWith(s, len, "or") || |
| endsWith(s, len, "en") || |
| endsWith(s, len, "at") || |
| endsWith(s, len, "te") || |
| endsWith(s, len, "et"))) |
| return len - 2; |
| |
| if (len > 3) |
| switch(s[len-1]) { |
| case 't': |
| case 'a': |
| case 'e': |
| case 'n': return len - 1; |
| } |
| |
| return len; |
| } |
| } |