}
                    reading = transliterator.transliterate(reading);

                    final int pos = text.indexOf(term, offset);
                    if (pos > 0) {
                        final String tmp = text.substring(offset, pos);
                        readingBuf.append(transliterator.transliterate(tmp));
                        offset = pos;

 * </pre>
 *
 * @see com.ibm.icu.text.Transliterator
 */
public class ICUNormalizer implements Normalizer {
    /** The transliterator used for normalization. */
    private final Transliterator transliterator;

    /**
     * Constructor for ICUNormalizer.
     * @param transliteratorId The ID of the transliterator to use.
     * @throws IllegalArgumentException if transliteratorId is null or invalid

    /** Transliterator for full-width to half-width conversion. */
    protected Transliterator fullWidthHalfWidth;

    /** Transliterator for any-lower. */
    protected Transliterator anyLower;

    /**
     * Constructor for KatakanaToAlphabetConverter.
     */
    public KatakanaToAlphabetConverter() {
        fullWidthHalfWidth = Transliterator.getInstance("Fullwidth-Halfwidth");

        }
    }

    public void test_invalidTransliteratorId() {
        try {
            new ICUNormalizer("Invalid-Transliterator-ID-12345");
            fail("Expected IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            assertTrue(e.getMessage().contains("Invalid transliterator ID"));
        }
    }