package org.apache.lucene.demo;
/**
* 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 org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.Term;
//import org.apache.lucene.index.Term;
/** Deletes documents from an index that do not contain a term. */
public class DeleteFiles {
private DeleteFiles() {} // singleton
/** Deletes documents from an index that do not contain a term. */
public static void main(String[] args) {
String usage = "java org.apache.lucene.demo.DeleteFiles <unique_term>";
if (args.length == 0) {
System.err.println("Usage: " + usage);
System.exit(1);
}
try {
Directory directory = FSDirectory.getDirectory("index");
IndexReader reader = IndexReader.open(directory);
Term term = new Term("path", args[0]);
int deleted = reader.deleteDocuments(term);
System.out.println("deleted " + deleted +
" documents containing " + term);
// one can also delete documents by their internal id:
/*
for (int i = 0; i < reader.maxDoc(); i++) {
System.out.println("Deleting document with id " + i);
reader.delete(i);
}*/
reader.close();
directory.close();
} catch (Exception e) {
System.out.println(" caught a " + e.getClass() +
"\n with message: " + e.getMessage());
}
}
}
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