com.cybermkd.common.util.stream.FileRenamer Maven / Gradle / Ivy

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package com.cybermkd.common.util.stream;

import com.cybermkd.common.Constant;
import com.cybermkd.log.Logger;

import java.io.File;
import java.io.IOException;

/**
 * An interface to provide a pluggable file renaming policy, particularly
 * useful to handle naming conflicts with an existing file.
 *
 * @author Jason Hunter
 * @version 1.0, 2002/04/30, initial revision, thanks to Changshin Lee for
 *          the basic idea
 */
public abstract class FileRenamer {
    public final static FileRenamer RENAMER;
    private final static Logger logger = Logger.getLogger(FileRenamer.class);

    static {
        FileRenamer fileRenamer = null;
        if (Constant.fileRenamer == null) {
            fileRenamer = new DefaultFileRenamer();
        } else {
            try {
                Class renameClass = Class.forName(Constant.fileRenamer);
                fileRenamer = (FileRenamer) renameClass.newInstance();
            } catch (ClassNotFoundException e) {
                logger.error("Could not found FileRenamer Class.", e);
            } catch (InstantiationException e) {
                logger.error("Could not init FileRenamer Class.", e);
            } catch (IllegalAccessException e) {
                logger.error("Could not access FileRenamer Class.", e);
            }
        }
        RENAMER = fileRenamer;
    }

    /**
     * Returns a File object holding a new name for the specified file.
     */
    public abstract File rename(File f);


    protected boolean createNewFile(File f) {
        try {
            return f.createNewFile();
        } catch (IOException ignored) {
            return false;
        }
    }
}