pylucene 3.5.0-3

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

diff --git a/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/HighFrequencyDictionary.java b/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/HighFrequencyDictionary.java
deleted file mode 100644 (file)
index 7db6ba3..0000000
--- a/lucene-java-3.4.0/lucene/contrib/spellchecker/src/java/org/apache/lucene/search/spell/HighFrequencyDictionary.java
+++ /dev/null
@@ -1,143 +0,0 @@
-/**
- * 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.search.spell;
-
-import java.io.IOException;
-import java.util.Iterator;
-
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.Term;
-import org.apache.lucene.index.TermEnum;
-import org.apache.lucene.search.spell.Dictionary;
-import org.apache.lucene.util.StringHelper;
-
-/**
- * HighFrequencyDictionary: terms taken from the given field
- * of a Lucene index, which appear in a number of documents
- * above a given threshold.
- *
- * When using IndexReader.terms(Term) the code must not call next() on TermEnum
- * as the first call to TermEnum, see: http://issues.apache.org/jira/browse/LUCENE-6
- *
- * Threshold is a value in [0..1] representing the minimum
- * number of documents (of the total) where a term should appear.
- * 
- * Based on LuceneDictionary.
- */
-public class HighFrequencyDictionary implements Dictionary {
-  private IndexReader reader;
-  private String field;
-  private float thresh;
-
-  public HighFrequencyDictionary(IndexReader reader, String field, float thresh) {
-    this.reader = reader;
-    this.field = StringHelper.intern(field);
-    this.thresh = thresh;
-  }
-
-  public final Iterator<String> getWordsIterator() {
-    return new HighFrequencyIterator();
-  }
-
-  final class HighFrequencyIterator implements TermFreqIterator {
-    private TermEnum termEnum;
-    private Term actualTerm;
-    private int actualFreq;
-    private boolean hasNextCalled;
-    private int minNumDocs;
-
-    HighFrequencyIterator() {
-      try {
-        termEnum = reader.terms(new Term(field, ""));
-        minNumDocs = (int)(thresh * (float)reader.numDocs());
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-
-    private boolean isFrequent(Term term) {
-      try {
-        return reader.docFreq(term) >= minNumDocs;
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-
-    public String next() {
-      if (!hasNextCalled) {
-        hasNext();
-      }
-      hasNextCalled = false;
-
-      try {
-        termEnum.next();
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-
-      return (actualTerm != null) ? actualTerm.text() : null;
-    }
-
-    public float freq() {
-      return actualFreq;
-    }
-
-
-    public boolean hasNext() {
-      if (hasNextCalled) {
-        return actualTerm != null;
-      }
-      hasNextCalled = true;
-
-      do {
-        actualTerm = termEnum.term();
-        actualFreq = termEnum.docFreq();
-
-        // if there are no words return false
-        if (actualTerm == null) {
-          return false;
-        }
-
-        String currentField = actualTerm.field();
-
-        // if the next word doesn't have the same field return false
-        if (currentField != field) {   // intern'd comparison
-          actualTerm = null;
-          return false;
-        }
-
-        // got a valid term, does it pass the threshold?
-        if (isFrequent(actualTerm)) {
-          return true;
-        }
-
-        // term not up to threshold
-        try {
-          termEnum.next();
-        } catch (IOException e) {
-          throw new RuntimeException(e);
-        }
-
-      } while (true);
-    }
-
-    public void remove() {
-      throw new UnsupportedOperationException();
-    }
-  }
-}