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/*
* Copyright 2017 gitblit.com.
*
* 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 com.gitblit.utils;
import java.io.File;
import java.nio.file.Path;
/**
* @author Florian Zschocke
*
* @since 1.9.0
*/
public class LuceneIndexStore
{
public static final int LUCENE_CODEC_VERSION = 54;
protected File indexFolder;
/**
* Constructor for a base folder that contains the version specific index folders
* and an index version.
*
* @param luceneFolder
* Path to the base folder for the Lucene indices, i.e. the common "lucene" directory.
* @param indexVersion
* Version of the index definition
*/
public LuceneIndexStore(File luceneFolder, int indexVersion)
{
this.indexFolder = new File(luceneFolder, indexVersion + "_" + LUCENE_CODEC_VERSION);
}
/**
* Create the Lucene index directory for this index version and Lucene codec version
*/
public void create()
{
if (! indexFolder.exists()) {
indexFolder.mkdirs();
}
}
/**
* Delete the Lucene index directory for this index version and Lucene codec version
*
* @return True if the directory could successfully be deleted.
*/
public boolean delete()
{
if (indexFolder.exists()) {
return FileUtils.delete(indexFolder);
}
return true;
}
/**
* @return The Path to the index folder
*/
public Path getPath()
{
return indexFolder.toPath();
}
/**
* Check if an index of the respective version, or compatible, already exists.
*
* @return True if an index exists, False otherwise
*/
public boolean hasIndex()
{
return indexFolder.exists() &&
indexFolder.isDirectory() &&
(indexFolder.list().length > 1);
}
}
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