return requiredValidator.isValid(value, null);
    }

    String getCrawlerDocumentSpaceChars();

    default int[] getCrawlerDocumentSpaceCharsAsArray() {
        return getCrawlerDocumentCharsAsArray(CRAWLER_DOCUMENT_SPACE_CHARS, getCrawlerDocumentSpaceChars());
    }

    default String[] getCrawlerDocumentSpaces() {

            @Override
            public String getCrawlerDocumentSpaceChars() {
                return "u0020u3000";
            }
        };

        int[] chars = fessConfig.getCrawlerDocumentSpaceCharsAsArray();
        assertEquals(2, chars.length);
        assertEquals(32, chars[0]);
        assertEquals(12288, chars[1]);
    }

    @Test

     * @return array of character codes to be treated as spaces
     */
    protected int[] getSpaceChars() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getCrawlerDocumentSpaceCharsAsArray();
    }

    /**
     * Creates a digest (abbreviated summary) of document content.
     * Truncates and normalizes content to create a summary suitable for display.
     *

Shinsuke Sugaya <******@****.***> 1774681159 +0900