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Java file server with SMB, FTP/FTPS and NFS support, virtual filesystems, database filesystems
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/*
 * Copyright (C) 2006-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see .
 */

package org.filesys.smb;

import java.util.Date;

/**
 * NT 64bit Time Conversion Class
 *
 * Convert an NT 64bit time value to a Java Date value and vice versa.
 *
 * @author gkspencer
 */
public class NTTime {

    //	NT time value indicating infinite time
    public static final long InfiniteTime = 0x7FFFFFFFFFFFFFFFL;

    //	Time conversion constant, difference between NT 64bit base date of 1-1-1601 00:00:00 and
    //	Java base date of 1-1-1970 00:00:00. In 100ns units.
    private static final long TIME_CONVERSION = 116444736000000000L;

    /**
     * Convert a Java Date value to an NT 64bit time
     *
     * @param jdate Date
     * @return long
     */
    public final static long toNTTime(Date jdate) {

        //	Add the conversion constant to the Java date raw value, convert the Java milliseconds to
        //	100ns units
        long ntDate = (jdate.getTime() * 10000L) + TIME_CONVERSION;
        return ntDate;
    }

    /**
     * Convert a Java Date value to an NT 64bit time
     *
     * @param jdate long
     * @return long
     */
    public final static long toNTTime(long jdate) {

        //	Add the conversion constant to the Java date raw value, convert the Java milliseconds to
        //	100ns units
        long ntDate = (jdate * 10000L) + TIME_CONVERSION;
        return ntDate;
    }

    /**
     * Convert an NT 64bit time value to a Java date value
     *
     * @param ntDate long
     * @return SMBDate
     */
    public final static SMBDate toSMBDate(long ntDate) {

        //	Convert the NT 64bit 100ns time value to a Java milliseconds value
        long jDate = (ntDate - TIME_CONVERSION) / 10000L;
        return new SMBDate(jDate);
    }

    /**
     * Convert an NT 64bit time value to a Java date value
     *
     * @param ntDate long
     * @return long
     */
    public final static long toJavaDate(long ntDate) {

        // Do not convert zero values
        if (ntDate == 0L)
            return 0L;

        //	Convert the NT 64bit 100ns time value to a Java milliseconds value
        long jDate = (ntDate - TIME_CONVERSION) / 10000L;
        return jDate;
    }
}