pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / contrib / analyzers / common / src / java / org / apache / lucene / analysis / bg / BulgarianStemmer.java

diff --git a/lucene-java-3.4.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/bg/BulgarianStemmer.java b/lucene-java-3.4.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/bg/BulgarianStemmer.java
deleted file mode 100644 (file)
index 2aa23cd..0000000
--- a/lucene-java-3.4.0/lucene/contrib/analyzers/common/src/java/org/apache/lucene/analysis/bg/BulgarianStemmer.java
+++ /dev/null
@@ -1,143 +0,0 @@
-package org.apache.lucene.analysis.bg;
-
-/**
- * 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.
- */
-
-import static org.apache.lucene.analysis.util.StemmerUtil.*;
-
-/**
- * Light Stemmer for Bulgarian.
- * <p>
- * Implements the algorithm described in:  
- * <i>
- * Searching Strategies for the Bulgarian Language
- * </i>
- * http://members.unine.ch/jacques.savoy/Papers/BUIR.pdf
- */
-public class BulgarianStemmer {
-  
-  /**
-   * Stem an input buffer of Bulgarian text.
-   * 
-   * @param s input buffer
-   * @param len length of input buffer
-   * @return length of input buffer after normalization
-   */
-  public int stem(final char s[], int len) {
-    if (len < 4) // do not stem
-      return len;
-    
-    if (len > 5 && endsWith(s, len, "ища"))
-      return len - 3;
-    
-    len = removeArticle(s, len);
-    len = removePlural(s, len);
-    
-    if (len > 3) {
-      if (endsWith(s, len, "я"))
-        len--;
-      if (endsWith(s, len, "а") ||
-          endsWith(s, len, "о") ||
-          endsWith(s, len, "е"))
-        len--;
-    }
-    
-    // the rule to rewrite ен -> н is duplicated in the paper.
-    // in the perl implementation referenced by the paper, this is fixed.
-    // (it is fixed here as well)
-    if (len > 4 && endsWith(s, len, "ен")) {
-      s[len - 2] = 'н'; // replace with н
-      len--;
-    }
-    
-    if (len > 5 && s[len - 2] == 'ъ') {
-      s[len - 2] = s[len - 1]; // replace ъN with N
-      len--;
-    }
-
-    return len;
-  }
-  
-  /**
-   * Mainly remove the definite article
-   * @param s input buffer
-   * @param len length of input buffer
-   * @return new stemmed length
-   */
-  private int removeArticle(final char s[], final int len) {
-    if (len > 6 && endsWith(s, len, "ият"))
-      return len - 3;
-    
-    if (len > 5) {
-      if (endsWith(s, len, "ът") ||
-          endsWith(s, len, "то") ||
-          endsWith(s, len, "те") ||
-          endsWith(s, len, "та") ||
-          endsWith(s, len, "ия"))
-        return len - 2;
-    }
-    
-    if (len > 4 && endsWith(s, len, "ят"))
-      return len - 2;
-
-    return len;
-  }
-  
-  private int removePlural(final char s[], final int len) {
-    if (len > 6) {
-      if (endsWith(s, len, "овци"))
-        return len - 3; // replace with о
-      if (endsWith(s, len, "ове"))
-        return len - 3;
-      if (endsWith(s, len, "еве")) {
-        s[len - 3] = 'й'; // replace with й
-        return len - 2;
-      }
-    }
-    
-    if (len > 5) {
-      if (endsWith(s, len, "ища"))
-        return len - 3;
-      if (endsWith(s, len, "та"))
-        return len - 2;
-      if (endsWith(s, len, "ци")) {
-        s[len - 2] = 'к'; // replace with к
-        return len - 1;
-      }
-      if (endsWith(s, len, "зи")) {
-        s[len - 2] = 'г'; // replace with г
-        return len - 1;
-      }
-      
-      if (s[len - 3] == 'е' && s[len - 1] == 'и') {
-        s[len - 3] = 'я'; // replace е with я, remove и
-        return len - 1;
-      }
-    }
-    
-    if (len > 4) {
-      if (endsWith(s, len, "си")) {
-        s[len - 2] = 'х'; // replace with х
-        return len - 1;
-      }
-      if (endsWith(s, len, "и"))
-        return len - 1;
-    }
-    
-    return len;
-  }
-}