com.github.ktools1000.io.BackupCreator Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2017 Alexander Kerner. All rights reserved.
*
* 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.github.ktools1000.io;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class BackupCreator {
private static final Logger logger = LoggerFactory.getLogger(BackupCreator.class);
/**
* Copies given file to a new file with file name suffix '.bak'.
*
* @param file
* the file to make a backup of
* @return the new file, or {@code null} in case of error
*/
public File makeBackup(final File file) {
if (file.exists())
try {
final File backupFile = new File(file.getParentFile(), file.getName() + ".bak");
FileUtils.copyFile(file, backupFile);
if (logger.isDebugEnabled())
logger.debug("Backup created as " + backupFile);
return backupFile;
} catch (final IOException e) {
if (logger.isErrorEnabled())
logger.error(e.getLocalizedMessage(), e);
}
return null;
}
public File restoreBackup(final File backupFile) {
if (backupFile.exists() && backupFile.getName().endsWith(".bak"))
try {
final String oldFileName = backupFile.getName().substring(0, backupFile.getName().length() - 4);
final File file = new File(backupFile.getParentFile(), oldFileName);
FileUtils.copyFile(backupFile, file);
if (logger.isDebugEnabled())
logger.debug("Backup restored to " + file);
return file;
} catch (final IOException e) {
if (logger.isErrorEnabled())
logger.error(e.getLocalizedMessage(), e);
}
return null;
}
}