* 
     * @param delimiter
     * @param elements
     * @return elements separated by delimiter
     */
    public static String join ( CharSequence delimiter, CharSequence... elements ) {
        StringBuilder sb = new StringBuilder();
        for ( CharSequence element : elements ) {
            if ( sb.length() > 0 ) {
                if ( delimiter != null ) {
                    sb.append(delimiter);
                }

         */
        public static CharSequence bbb() {
            return createCharSequence("bbb");
        }

        /**
         * @return CharSequence
         */
        public static CharSequence ccc() {
            return createCharSequence("ccc");
        }

        /**
         * @return CharSequence
         */
        public static CharSequence hoge() {

    public CopyOptions numberConverter(final String pattern, final CharSequence... propertyNames) {
        assertArgumentNotEmpty("pattern", pattern);

        return converter(new NumberConverter(pattern), propertyNames);
    }

    /**
     * {@literal CharSequence}の配列を{@literal String}の{@literal List}に変換します。
     *
     * @param array
     *            {@literal CharSequence}の配列
     * @return {@literal String}の{@literal List}

import org.codelibs.fess.util.ComponentUtil;
import org.hibernate.validator.constraintvalidation.HibernateConstraintValidatorContext;

public class CustomSizeValidator implements ConstraintValidator<CustomSize, CharSequence> {
    private int min = 0;
    private int max = Integer.MAX_VALUE;
    private String message;

    @Override
    public void initialize(final CustomSize constraintAnnotation) {

            }
        }
        return input;
    }

    public boolean hasUAMathcer() {
        return StringUtil.isNotBlank(getUserAgent());
    }

    public Matcher getUAMatcher(final CharSequence input) {
        if (!hasUAMathcer()) {
            return null;
        }

        if (userAgentPattern == null) {
            userAgentPattern = Pattern.compile(getUserAgent());
        }

         * @return CharSequence
         */
        public static CharSequence bbb() {
            return createCharSequence("bbb");
        }

        /**
         * @return CharSequence
         */
        public static CharSequence ccc() {
            return createCharSequence("ccc");
        }

        /**
         * @return CharSequence
         */
        public static CharSequence hoge() {

     * @param argValue
     *            引数の値
     * @throws EmptyArgumentException
     *             引数が<code>null</code>または空文字列の場合。
     */
    public static void assertArgumentNotEmpty(final String argName, final CharSequence argValue) {
        if (argValue == null || argValue.length() == 0) {
            throw new EmptyArgumentException(argName, "ECL0010", asArray(argName));
        }
    }

    /**

     *
     * @param propertyNames
     *            プロパティ名の配列。{@literal null}や空配列であってはいけません
     * @return 操作の対象に含めるプロパティ名を指定した{@link CopyOptions}
     * @see CopyOptions#include(CharSequence...)
     */
    public static CopyOptions include(final CharSequence... propertyNames) {
        return new CopyOptions().include(propertyNames);
    }

    /**
     * 操作の対象に含めないプロパティ名を指定した{@link CopyOptions}を返します。
     *

        return str == null ? defaultStr : str;
    }

    /**
     * <p>Checks if the CharSequence contains only ASCII printable characters.</p>
     *
     * <p>{@code null} will return {@code false}.
     * An empty CharSequence (length()=0) will return {@code true}.</p>
     *
     * <pre>
     * StringUtils.isAsciiPrintable(null)     = false