Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, 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.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, 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/**
 * 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.
Params:
a – 
b – 
Throws:
Exception – 
Returns:
/**
     * 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);
        }
    }
}