FileNameGenerator.java

package de.danoeh.antennapodsp.util;

import java.util.Arrays;

/**
 * Generates valid filenames for a given string.
 */
public class FileNameGenerator {

    private static final char[] ILLEGAL_CHARACTERS = {'/', '\\', '?', '%',
            '*', ':', '|', '"', '<', '>'};

    static {
        Arrays.sort(ILLEGAL_CHARACTERS);
    }

    private FileNameGenerator() {

    }

    /**
     * This method will return a new string that doesn't contain any illegal
     * characters of the given string.
     */
    public static String generateFileName(String string) {
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < string.length(); i++) {
            char c = string.charAt(i);
            if (Arrays.binarySearch(ILLEGAL_CHARACTERS, c) < 0) {
                builder.append(c);
            }
        }
        return builder.toString().replaceFirst("  *$", "");
    }

    public static long generateLong(final String str) {
        return str.hashCode();
    }
}