* @return The HTML response.
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse delete(final FileAccessForm form) {
        getTargetFile(form.fileName).ifPresent(file -> {
            if (!file.delete()) {
                logger.error("Failed to delete design file: {}", file.getAbsolutePath());

            throw new IllegalArgumentException(msg);
        }
        final StringBuilder sb = new StringBuilder();
        LaRequestUtil.getOptionalRequest().map(HttpServletRequest::getContextPath).filter(s -> s.length() > 1).ifPresent(s -> sb.append(s));
        sb.append(input);
        if (input.indexOf('?') == -1) {
            try {
                final Long value = resourceHashCache.get(input);
                if (value.longValue() > 0) {

        cmdList.add(fessConfig.getJavaCommandPath());

        // -cp
        cmdList.add("-cp");
        final StringBuilder buf = new StringBuilder(100);
        ResourceUtil.getOverrideConfPath().ifPresent(p -> {
            buf.append(p);
            buf.append(cpSeparator);
        });
        final String confPath = System.getProperty(Constants.FESS_CONF_PATH);
        if (StringUtil.isNotBlank(confPath)) {

                            final String configId = (String) doc.get(fessConfig.getIndexFieldConfigId());
                            crawlingConfigHelper.getPipeline(configId).ifPresent(s -> builder.setPipeline(s));
                        });
                if (response.hasFailures()) {
                    if (logger.isDebugEnabled()) {

            searchHelper
                    .getDocumentByDocId(docId, new String[] { fessConfig.getIndexFieldUrl(), fessConfig.getIndexFieldLang() },
                            OptionalThing.empty())
                    .ifPresent(doc -> {
                        final String favoriteUrl = DocumentUtil.getValue(doc, fessConfig.getIndexFieldUrl(), String.class);
                        final String userCode = userInfoHelper.getUserCode();

        return search(index, condition, (searchRequestBuilder, execTime, searchResponse) -> {
            final List<T> list = new ArrayList<>();
            searchResponse.ifPresent(response -> response.getHits().forEach(hit -> {
                list.add(creator.build(response, hit));
            }));
            return list;
        });
    }

    /**