final StringBuilder textBuilder = new StringBuilder();

        // Add headers to text
        if (headers != null) {
            textBuilder.append(String.join(fieldSeparator, headers)).append(lineSeparator);
        }

        // Add rows to text
        for (final String[] row : rows) {
            if (headers != null && headers.length > 0) {

            cmdList.add(StringUtils.join(webConfigIds, ','));
        }
        if (fileConfigIds != null && fileConfigIds.length > 0) {
            cmdList.add("-f");
            cmdList.add(StringUtils.join(fileConfigIds, ','));
        }
        if (dataConfigIds != null && dataConfigIds.length > 0) {
            cmdList.add("-d");
            cmdList.add(StringUtils.join(dataConfigIds, ','));
        }

            final float boost, final String field, final String[] texts) {
        final String text = String.join(" ", texts);

        if (Constants.DEFAULT_FIELD.equals(field)) {
            context.addFieldLog(field, text);
            stream(texts).of(stream -> stream.forEach(t -> context.addHighlightedQuery(t)));

         * Interrupted exceptions are caught and logged at debug level.
         */
        public void awaitTermination() {
            try {
                join();
            } catch (final InterruptedException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupted.", e);
                }
            }
        }

            final InputStreamThread it = jobProcess.getInputStreamThread();
            it.start();

            final Process currentProcess = jobProcess.getProcess();
            currentProcess.waitFor();
            it.join(5000);

            final int exitValue = currentProcess.exitValue();

            if (logger.isInfoEnabled()) {

            final InputStreamThread it = jobProcess.getInputStreamThread();
            it.start();

            final Process currentProcess = jobProcess.getProcess();
            currentProcess.waitFor();
            it.join(5000);

            final int exitValue = currentProcess.exitValue();

            if (logger.isInfoEnabled()) {

                metaDataMap.put(key, values);

                // meta -> content
                if (fessConfig.isCrawlerMetadataContentIncluded(key)) {
                    final String joinedValue = StringUtils.join(values, ' ');
                    if (StringUtil.isNotBlank(joinedValue)) {
                        if (contentMetaBuf.length() > 0) {
                            contentMetaBuf.append(' ');
                        }

        }

        request.getParameterMap().entrySet().stream().forEach(entry -> {
            if (entry.getValue().length > 1) {
                curlRequest.param(entry.getKey(), String.join(",", entry.getValue()));
            } else if (entry.getValue().length == 1) {
                curlRequest.param(entry.getKey(), entry.getValue()[0]);
            }
        });

            final InputStreamThread it = new InputStreamThread(currentProcess.getInputStream(), commandOutputEncoding, maxOutputLine);
            it.start();

            currentProcess.waitFor();
            it.join(5000);

            if (mt.isTeminated()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Command execution timeout for user: username={}", username);
                }

     *
     * @param input the input object (String[], List, or String)
     * @return joined string with elements separated by spaces, or empty string if invalid input
     */
    public static String join(final Object input) {
        String[] values = null;
        if (input instanceof String[]) {
            values = (String[]) input;
        } else if (input instanceof List) {