/**
* Copyright 2005 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.
*/
package org.creativecommons.nutch;
import org.apache.nutch.io.*;
import org.apache.nutch.util.LogFormatter;
import org.apache.nutch.indexer.IndexSegment;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.document.Document;
import java.io.*;
import java.util.Vector;
import java.util.logging.Logger;
/** Deletes documents in a set of Lucene indexes that do not have a Creative
* Commons license. */
public class CCDeleteUnlicensedTool {
private static final Logger LOG =
LogFormatter.getLogger("org.creativecommons.nutch.CCDeleteUnlicensedTool");
private IndexReader[] readers;
/** Constructs a duplicate detector for the provided indexes. */
public CCDeleteUnlicensedTool(IndexReader[] readers) {
this.readers = readers;
}
/** Closes the indexes, saving changes. */
public void close() throws IOException {
for (int i = 0; i < readers.length; i++)
readers[i].close();
}
/** Delete pages without CC licenes. */
public int deleteUnlicensed() throws IOException {
int deleteCount = 0;
for (int index = 0; index < readers.length; index++) {
IndexReader reader = readers[index];
int readerMax = reader.maxDoc();
for (int doc = 0; doc < readerMax; doc++) {
if (!reader.isDeleted(doc)) {
Document document = reader.document(doc);
if (document.get(CCIndexingFilter.FIELD)==null){ // no CC fields
reader.delete(doc); // delete it
deleteCount++;
}
}
}
}
return deleteCount;
}
/** Delete duplicates in the indexes in the named directory. */
public static void main(String[] args) throws Exception {
String usage = "CCDeleteUnlicensedTool <segmentsDir>";
if (args.length != 1) {
System.err.println("Usage: " + usage);
return;
}
String segmentsDir = args[0];
File[] directories = new File(segmentsDir).listFiles();
Vector vReaders=new Vector();
int maxDoc = 0;
for (int i = 0; i < directories.length; i++) {
File indexDone = new File(directories[i], IndexSegment.DONE_NAME);
if (indexDone.exists() && indexDone.isFile()){
File indexDir = new File(directories[i], "index");
IndexReader reader = IndexReader.open(indexDir);
maxDoc += reader.maxDoc();
vReaders.add(reader);
}
}
IndexReader[] readers=new IndexReader[vReaders.size()];
for(int i = 0; vReaders.size()>0; i++) {
readers[i]=(IndexReader)vReaders.remove(0);
}
CCDeleteUnlicensedTool dd = new CCDeleteUnlicensedTool(readers);
int count = dd.deleteUnlicensed();
LOG.info("CC: deleted "+count+" out of "+maxDoc);
dd.close();
}
}