FileTime.java

/*
 * This file is part of Fim - File Integrity Manager
 *
 * Copyright (C) 2017  Etienne Vrignaud
 *
 * Fim is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Fim 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Fim.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fim.model;

import com.google.common.base.Charsets;
import com.google.common.base.MoreObjects;
import com.google.common.hash.Hasher;

import java.nio.file.attribute.BasicFileAttributes;
import java.util.Objects;

public class FileTime implements Comparable<FileTime>, Hashable {
    private long creationTime;
    private long lastModified;

    public FileTime() {
        // Empty constructor for Jackson
    }

    public FileTime(long creationTime, long lastModified) {
        setCreationTime(creationTime);
        setLastModified(lastModified);
    }

    public FileTime(BasicFileAttributes attributes) {
        this(attributes.creationTime().toMillis(), attributes.lastModifiedTime().toMillis());
    }

    public FileTime(long timestamp) {
        this(timestamp, timestamp);
    }

    public FileTime(FileTime fileTime) {
        this(fileTime.getCreationTime(), fileTime.getLastModified());
    }

    public long getCreationTime() {
        return creationTime;
    }

    public void setCreationTime(long creationTime) {
        this.creationTime = creationTime;
    }

    public long getLastModified() {
        return lastModified;
    }

    public void setLastModified(long lastModified) {
        this.lastModified = lastModified;
    }

    public void reset(long timestamp) {
        setCreationTime(timestamp);
        setLastModified(timestamp);
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) {
            return true;
        }

        if (other == null || !(other instanceof FileTime)) {
            return false;
        }

        FileTime otherFileTime = (FileTime) other;

        return Objects.equals(this.creationTime / 1000, otherFileTime.creationTime / 1000)
            && Objects.equals(this.lastModified / 1000, otherFileTime.lastModified / 1000);
    }

    @Override
    public int hashCode() {
        return Objects.hash(creationTime, lastModified);
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
            .add("creationTime", creationTime)
            .add("lastModified", lastModified)
            .toString();
    }

    @Override
    public int compareTo(FileTime other) {
        long ct = creationTime / 1000;
        long oct = other.creationTime / 1000;
        if (ct != oct) {
            return Long.compare(ct, oct);
        }

        return Long.compare(lastModified / 1000, other.lastModified / 1000);
    }

    @Override
    public void hashObject(Hasher hasher) {
        hashObject(hasher, false);
    }

    public void hashObject(Hasher hasher, boolean millisecondsRemoved) {
        hasher
            .putString("FileTime", Charsets.UTF_8)
            .putChar(HASH_FIELD_SEPARATOR)
            .putLong(millisecondsRemoved ? creationTime / 1000 : creationTime)
            .putChar(HASH_FIELD_SEPARATOR)
            .putLong(millisecondsRemoved ? lastModified / 1000 : lastModified);
    }
}