if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == java.sql.Date.class;
    }

    public String getAsString(final Object value) {
        if (value == null) {
            return null;
        }
        return new DecimalFormat(pattern).format(value);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return Number.class.isAssignableFrom(clazz);
    }

        if (value == null) {
            return null;
        }
        return StringConversionUtil.toString((Date) value, pattern);
    }

    @Override
    public boolean isTarget(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);
        return clazz == java.sql.Timestamp.class;
    }

     * @return a DictionaryFile instance if the path matches, null otherwise
     */
    public DictionaryFile<? extends DictionaryItem> create(final String path, final Date timestamp) {
        if (!isTarget(path)) {
            return null;
        }

        return newDictionaryFile(encodePath(path), path, timestamp);
    }

    /**
     * Encodes a file path using Base64 URL-safe encoding.
     *

     * Checks if this generator can handle the given document.
     * @param docMap The document map containing metadata.
     * @return True if this generator can handle the document, false otherwise.
     */
    boolean isTarget(Map<String, Object> docMap);

    /**
     * Checks if this thumbnail generator is available for use.
     * @return True if available, false otherwise.
     */
    boolean isAvailable();

    /**

        final int m = cal.get(Calendar.MINUTE);
        final int d = cal.get(Calendar.DAY_OF_WEEK); // SUN(1) - SAT(7)
        for (final IntervalRule rule : ruleList) {
            if (rule.isTarget(h, m, d)) {
                return rule.getDelay();
            }
        }
        return 0;
    }

    /**
     * Gets the current calendar instance set to the system time.
     *

        if (StringUtil.isBlank(value)) {
            conditionMap.put(key, regex);
        } else {
            conditionMap.put(key, value + "|" + regex);
        }
    }

    @Override
    public boolean isTarget(final Map<String, Object> docMap) {
        final String thumbnailFieldName = ComponentUtil.getFessConfig().getIndexFieldThumbnail();
        if (logger.isDebugEnabled()) {

            return generateResult;
        }

        @Override
        public boolean isAvailable() {
            return available;
        }

        @Override
        public boolean isTarget(Map<String, Object> docMap) {
            return target;
        }

        @Override
        public Tuple3<String, String, String> createTask(String path, Map<String, Object> docMap) {
            return task;

     * @param clazz
     *            The class
     * @return The converter
     */
    protected Converter findConverter(final Class<?> clazz) {
        for (final Converter c : converters) {
            if (c.isTarget(clazz)) {
                return c;
            }
        }
        return null;
    }

    /**
     * Finds the default converter corresponding to the class.
     *
     * @param clazz

     */
    public boolean offer(final Map<String, Object> docMap) {
        for (final ThumbnailGenerator generator : generatorList) {
            if (generator.isTarget(docMap)) {
                final String path = getImageFilename(docMap);
                final Tuple3<String, String, String> task = generator.createTask(path, docMap);
                if (task != null) {