net.sf.jvifm.util.FileComprator.java Source code

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Here is the source code for net.sf.jvifm.util.FileComprator.java

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/*
* Jvifm - Java vifm (File Manager with vi like key binding)
*
* Copyright (C) 2006 wsn <shrek.wang@gmail.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package net.sf.jvifm.util;

import java.io.*;
import java.util.*;
import org.apache.commons.io.*;

public class FileComprator {

    public static Comparator<File> getFileComprator(String field, boolean isReverse) {
        if (field.equals("size")) {
            return new CompratorBySize(isReverse);
        } else if (field.equals("name")) {
            return new CompratorByName(isReverse);
        } else if (field.equals("date")) {
            return new CompratorByLastModified(isReverse);
        } else if (field.equals("ext")) {
            return new CompratorByExt(isReverse);
        }
        return null;
    }
}

class CompratorByLastModified implements Comparator<File> {
    private boolean isReverse = false;

    public CompratorByLastModified(boolean isReverse) {
        this.isReverse = isReverse;
    }

    public int compare(File file1, File file2) {

        long diff = file1.lastModified() - file2.lastModified();
        int result;

        if (diff >= 0)
            result = 1;
        else
            result = -1;
        if (isReverse)
            return 0 - result;
        return result;

    }

    public boolean equals(Object obj) {
        return true;
    }

}

class CompratorBySize implements Comparator<File> {
    private boolean isReverse = false;

    public CompratorBySize(boolean isReverse) {
        this.isReverse = isReverse;
    }

    public int compare(File file1, File file2) {
        long diff = file1.length() - file2.length();
        int result;

        if (diff >= 0)
            result = 1;
        else
            result = -1;
        if (isReverse)
            return 0 - result;
        return result;

    }

    public boolean equals(Object obj) {
        return true;
    }

}

class CompratorByName implements Comparator<File> {
    private boolean isReverse = false;

    public CompratorByName(boolean isReverse) {
        this.isReverse = isReverse;
    }

    public int compare(File file1, File file2) {
        boolean file1IsFile = file1.isDirectory() ? false : true;
        boolean file2IsFile = file2.isDirectory() ? false : true;

        if (file1IsFile && !file2IsFile) {
            if (isReverse)
                return -1;
            return 1;
        }
        if (!file1IsFile && file2IsFile) {
            if (isReverse)
                return 1;
            return -1;
        }
        if (isReverse)
            return file2.getName().compareTo(file1.getName());
        return file1.getName().compareTo(file2.getName());

    }

    public boolean equals(Object obj) {
        return true;
    }

}

class CompratorByExt implements Comparator<File> {
    private boolean isReverse = false;

    public CompratorByExt(boolean isReverse) {
        this.isReverse = isReverse;
    }

    public int compare(File file1, File file2) {
        String file1Ext = FilenameUtils.getExtension(file1.getName());
        String file2Ext = FilenameUtils.getExtension(file2.getName());
        if (file1.isFile() && file2.isDirectory()) {
            if (isReverse)
                return -1;
            return 1;
        }
        if (file1.isDirectory() && file2.isFile()) {
            if (isReverse)
                return 1;
            return -1;
        }
        int result = 0;
        if (isReverse) {
            result = file2Ext.compareTo(file1Ext);
        } else {
            result = file1Ext.compareTo(file2Ext);
        }
        if (result == 0)
            result = 1;
        return result;
    }

    public boolean equals(Object obj) {
        return true;
    }
}