pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / contrib / misc / src / java / org / apache / lucene / index / FieldNormModifier.java

diff --git a/lucene-java-3.4.0/lucene/contrib/misc/src/java/org/apache/lucene/index/FieldNormModifier.java b/lucene-java-3.4.0/lucene/contrib/misc/src/java/org/apache/lucene/index/FieldNormModifier.java
deleted file mode 100644 (file)
index 5805b42..0000000
--- a/lucene-java-3.4.0/lucene/contrib/misc/src/java/org/apache/lucene/index/FieldNormModifier.java
+++ /dev/null
@@ -1,159 +0,0 @@
-package org.apache.lucene.index;
-
-/**
- * Copyright 2006 The Apache Software Foundation
- *
- * Licensed 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.io.IOException;
-import java.io.File;
-import java.util.Date;
-
-import org.apache.lucene.search.Similarity;
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.store.FSDirectory;
-import org.apache.lucene.util.StringHelper;
-
-/**
- * Given a directory and a list of fields, updates the fieldNorms in place for every document.
- * 
- * If Similarity class is specified, uses its computeNorm method to set norms.
- * If -n command line argument is used, removed field norms, as if 
- * {@link org.apache.lucene.document.Field.Index}.NO_NORMS was used.
- *
- * <p>
- * NOTE: This will overwrite any length normalization or field/document boosts.
- * </p>
- *
- */
-public class FieldNormModifier {
-
-  /**
-   * Command Line Execution method.
-   *
-   * <pre>
-   * Usage: FieldNormModifier /path/index &lt;package.SimilarityClassName | -n&gt; field1 field2 ...
-   * </pre>
-   */
-  public static void main(String[] args) throws IOException {
-    if (args.length < 3) {
-      System.err.println("Usage: FieldNormModifier <index> <package.SimilarityClassName | -n> <field1> [field2] ...");
-      System.exit(1);
-    }
-
-    Similarity s = null;
-    if (!args[1].equals("-n")) {
-      try {
-        s = Class.forName(args[1]).asSubclass(Similarity.class).newInstance();
-      } catch (Exception e) {
-        System.err.println("Couldn't instantiate similarity with empty constructor: " + args[1]);
-        e.printStackTrace(System.err);
-        System.exit(1);
-      }
-    }
-
-    Directory d = FSDirectory.open(new File(args[0]));
-    FieldNormModifier fnm = new FieldNormModifier(d, s);
-
-    for (int i = 2; i < args.length; i++) {
-      System.out.print("Updating field: " + args[i] + " " + (new Date()).toString() + " ... ");
-      fnm.reSetNorms(args[i]);
-      System.out.println(new Date().toString());
-    }
-    
-    d.close();
-  }
-  
-  
-  private Directory dir;
-  private Similarity sim;
-  
-  /**
-   * Constructor for code that wishes to use this class programmatically
-   * If Similarity is null, kill the field norms.
-   *
-   * @param d the Directory to modify
-   * @param s the Similarity to use (can be null)
-   */
-  public FieldNormModifier(Directory d, Similarity s) {
-    dir = d;
-    sim = s;
-  }
-
-  /**
-   * Resets the norms for the specified field.
-   *
-   * <p>
-   * Opens a new IndexReader on the Directory given to this instance,
-   * modifies the norms (either using the Similarity given to this instance, or by using fake norms,
-   * and closes the IndexReader.
-   * </p>
-   *
-   * @param field the field whose norms should be reset
-   */
-  public void reSetNorms(String field) throws IOException {
-    String fieldName = StringHelper.intern(field);
-    int[] termCounts = new int[0];
-    
-    IndexReader reader = null;
-    TermEnum termEnum = null;
-    TermDocs termDocs = null;
-    try {
-      reader = IndexReader.open(dir, true);
-      termCounts = new int[reader.maxDoc()];
-      try {
-        termEnum = reader.terms(new Term(field));
-        try {
-          termDocs = reader.termDocs();
-          do {
-            Term term = termEnum.term();
-            if (term != null && term.field().equals(fieldName)) {
-              termDocs.seek(termEnum.term());
-              while (termDocs.next()) {
-                termCounts[termDocs.doc()] += termDocs.freq();
-              }
-            }
-          } while (termEnum.next());
-          
-        } finally {
-          if (null != termDocs) termDocs.close();
-        }
-      } finally {
-        if (null != termEnum) termEnum.close();
-      }
-    } finally {
-      if (null != reader) reader.close();
-    }
-    
-    try {
-      reader = IndexReader.open(dir, false); 
-      final FieldInvertState invertState = new FieldInvertState();
-      invertState.setBoost(1.0f);
-      for (int d = 0; d < termCounts.length; d++) {
-        if (! reader.isDeleted(d)) {
-          if (sim == null)
-            reader.setNorm(d, fieldName, Similarity.encodeNorm(1.0f));
-          else {
-            invertState.setLength(termCounts[d]);
-            reader.setNorm(d, fieldName, sim.encodeNormValue(sim.computeNorm(fieldName, invertState)));
-          }
-        }
-      }
-      
-    } finally {
-      if (null != reader) reader.close();
-    }
-  }
-  
-}