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package com.jpattern.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.Charset;

/**
 * 
 * @author Francesco Cina'
 * 
 *         21/lug/2010
 */
public abstract class FileUtil {

	/**
	 * @param An absolute or relative file path
	 * @return the file name without the full path
	 */
	public static String removePath(String filename) {
		final int pos = filename.lastIndexOf(File.separatorChar);
		if (pos > -1) {
			filename = filename.substring(pos + 1);
		}
		return filename;
	}

	/**
	 * 
	 * @param filename a file name
	 * @return the file name without extension
	 */
	public static String removeExtension(String filename) {
		final int lastindex = filename.lastIndexOf('.');
		if ( lastindex != -1 ) {
			return filename.substring(0, lastindex);
		}
		return filename;
	}

	/**
	 * 
	 * @param filename a file name
	 * @return the extension of the file, an empty String otherwise
	 */
	public static String getExtension(String filename) {
		final int lastindex = filename.lastIndexOf('.');
		if ( (lastindex != -1) && (lastindex