package org.apache.lucene.misc;
/**
* 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.io.File;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiFields;
/*
* Utility to get document frequency and total number of occurrences (sum of the tf for each doc) of a term.
*/
public class GetTermInfo {
public static void main(String[] args) throws Exception {
FSDirectory dir = null;
String inputStr = null;
String field = null;
if (args.length == 3) {
dir = FSDirectory.open(new File(args[0]));
field = args[1];
inputStr = args[2];
} else {
usage();
System.exit(1);
}
getTermInfo(dir,field, new BytesRef(inputStr));
}
public static void getTermInfo(Directory dir, String field, BytesRef termtext) throws Exception {
IndexReader reader = IndexReader.open(dir);
Terms terms =MultiFields.getTerms(reader, field);
long totalTF = HighFreqTerms.getTotalTermFreq(reader, field, termtext);
System.out.printf("%s:%s \t totalTF = %,d \t doc freq = %,d \n",
field, termtext.utf8ToString(), totalTF, terms.docFreq(termtext));
}
private static void usage() {
System.out
.println("\n\nusage:\n\t"
+ "java org.apache.lucene.index.GetTermInfo <index dir> field term \n\n");
}
}