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This module provides the TFile* classes for simple, uniform, transparent, thread-safe, read/write access to archive files as if they were virtual directories in a file system path. This module also provides Swing GUI classes for viewing file trees and choosing entries in archive files.

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/*
 * Copyright (C) 2005-2015 Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package de.schlichtherle.truezip.file;

import java.io.File;
import java.io.Serializable;
import java.text.Collator;
import java.util.Comparator;
import javax.annotation.concurrent.Immutable;

/**
 * Compares two files by their status and path name so that directories
 * are always ordered before other files.
 *
 * @author Christian Schlichtherle
 */
@Immutable
public final class TFileComparator implements Comparator, Serializable {

    private static final long serialVersionUID = 1234567890123456789L;

    /**
     * A collator for file names which considers case according to the
     * platform's standard.
     */
    private static final Collator COLLATOR = Collator.getInstance();
    static {
        // Set minimum requirements for maximum performance.
        COLLATOR.setDecomposition(Collator.NO_DECOMPOSITION);
        COLLATOR.setStrength(File.separatorChar == '\\'
                ? Collator.SECONDARY
                : Collator.TERTIARY);
    }

    @Override
    public int compare(File f1, File f2) {
        return f1.isDirectory()
            ? f2.isDirectory()
                    ? COLLATOR.compare(f1.getName(), f2.getName())
                    : -1
            : f2.isDirectory()
                    ? 1
                    : COLLATOR.compare(f1.getName(), f2.getName());
    }
}