jodd.io.findfile.FileExtensionComparator Maven / Gradle / Ivy

Go to download
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

package jodd.io.findfile;

import jodd.io.FileNameUtil;

import java.io.File;
import java.io.Serializable;
import java.util.Comparator;

public class FileExtensionComparator implements Comparator, Serializable {
	protected final int order;

	public FileExtensionComparator(final boolean ascending) {
		if (ascending) {
			order = 1;
		} else {
			order = -1;
		}
	}

	@Override
	public int compare(final File file1, final File file2) {
		String ext1 = FileNameUtil.getExtension(file1.getName());
		String ext2 = FileNameUtil.getExtension(file2.getName());
		long diff = ext1.compareToIgnoreCase(ext2);
		if (diff == 0) {
			return 0;
		}
		if (diff > 0) {
			return order;
		}
		return -order;
	}
}