/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.core.rolling.helper;
import ch.qos.logback.core.rolling.RolloverFailure;
import java.io.File;
import java.lang.reflect.Method;
/**
* A utility class using functionality available since JDK 1.7.
*
* @author ceki
* @since 1.0.10
*/
public class FileStoreUtil {
static final String PATH_CLASS_STR = "java.nio.file.Path";
static final String FILES_CLASS_STR = "java.nio.file.Files";
/**
* This method assumes that both files a and b exists.
*
* @param a
* @param b
* @return
* @throws Exception
*/
static public boolean areOnSameFileStore(File a, File b) throws RolloverFailure {
if (!a.exists()) {
throw new IllegalArgumentException("File [" + a + "] does not exist.");
}
if (!b.exists()) {
throw new IllegalArgumentException("File [" + b + "] does not exist.");
}
// Implements the following by reflection
// Path pathA = a.toPath();
// Path pathB = b.toPath();
//
// FileStore fileStoreA = Files.getFileStore(pathA);
// FileStore fileStoreB = Files.getFileStore(pathB);
//
// return fileStoreA.equals(fileStoreB);
try {
Class pathClass = Class.forName(PATH_CLASS_STR);
Class filesClass = Class.forName(FILES_CLASS_STR);
Method toPath = File.class.getMethod("toPath");
Method getFileStoreMethod = filesClass.getMethod("getFileStore", pathClass);
Object pathA = toPath.invoke(a);
Object pathB = toPath.invoke(b);
Object fileStoreA = getFileStoreMethod.invoke(null, pathA);
Object fileStoreB = getFileStoreMethod.invoke(null, pathB);
return fileStoreA.equals(fileStoreB);
} catch (Exception e) {
throw new RolloverFailure("Failed to check file store equality for [" + a + "] and [" + b + "]", e);
}
}
}