pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / contrib / spellchecker / src / java / org / apache / lucene / search / spell / JaroWinklerDistance.java

diff --git a/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/JaroWinklerDistance.java b/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/JaroWinklerDistance.java
deleted file mode 100644 (file)
index 3818173..0000000
--- a/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/JaroWinklerDistance.java
+++ /dev/null
@@ -1,112 +0,0 @@
-package org.apache.lucene.search.spell;
-
-/**
- * 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 java.util.Arrays;
-
-public class JaroWinklerDistance implements StringDistance {
-
-  private float threshold = 0.7f;
-
-  private int[] matches(String s1, String s2) {
-    String max, min;
-    if (s1.length() > s2.length()) {
-      max = s1;
-      min = s2;
-    } else {
-      max = s2;
-      min = s1;
-    }
-    int range = Math.max(max.length() / 2 - 1, 0);
-    int[] matchIndexes = new int[min.length()];
-    Arrays.fill(matchIndexes, -1);
-    boolean[] matchFlags = new boolean[max.length()];
-    int matches = 0;
-    for (int mi = 0; mi < min.length(); mi++) {
-      char c1 = min.charAt(mi);
-      for (int xi = Math.max(mi - range, 0), xn = Math.min(mi + range + 1, max
-          .length()); xi < xn; xi++) {
-        if (!matchFlags[xi] && c1 == max.charAt(xi)) {
-          matchIndexes[mi] = xi;
-          matchFlags[xi] = true;
-          matches++;
-          break;
-        }
-      }
-    }
-    char[] ms1 = new char[matches];
-    char[] ms2 = new char[matches];
-    for (int i = 0, si = 0; i < min.length(); i++) {
-      if (matchIndexes[i] != -1) {
-        ms1[si] = min.charAt(i);
-        si++;
-      }
-    }
-    for (int i = 0, si = 0; i < max.length(); i++) {
-      if (matchFlags[i]) {
-        ms2[si] = max.charAt(i);
-        si++;
-      }
-    }
-    int transpositions = 0;
-    for (int mi = 0; mi < ms1.length; mi++) {
-      if (ms1[mi] != ms2[mi]) {
-        transpositions++;
-      }
-    }
-    int prefix = 0;
-    for (int mi = 0; mi < min.length(); mi++) {
-      if (s1.charAt(mi) == s2.charAt(mi)) {
-        prefix++;
-      } else {
-        break;
-      }
-    }
-    return new int[] { matches, transpositions / 2, prefix, max.length() };
-  }
-
-  public float getDistance(String s1, String s2) {
-    int[] mtp = matches(s1, s2);
-    float m = mtp[0];
-    if (m == 0) {
-      return 0f;
-    }
-    float j = ((m / s1.length() + m / s2.length() + (m - mtp[1]) / m)) / 3;
-    float jw = j < getThreshold() ? j : j + Math.min(0.1f, 1f / mtp[3]) * mtp[2]
-        * (1 - j);
-    return jw;
-  }
-
-  /**
-   * Sets the threshold used to determine when Winkler bonus should be used.
-   * Set to a negative value to get the Jaro distance.
-   * @param threshold the new value of the threshold
-   */
-  public void setThreshold(float threshold) {
-    this.threshold = threshold;
-  }
-
-  /**
-   * Returns the current value of the threshold used for adding the Winkler bonus.
-   * The default value is 0.7.
-   * @return the current value of the threshold
-   */
-  public float getThreshold() {
-    return threshold;
-  }
-}