* @param contentSize the content size to add in bytes
     */
    public void addContentSize(final long contentSize) {
        this.contentSize += contentSize;
    }

    /**
     * Gets the total processing time for all documents in this list.
     *
     * @return the total processing time in milliseconds
     */
    public long getProcessingTime() {
        return processingTime;
    }

    /**

            long contentSize = 0;
            while (entries.hasMoreElements()) {
                final LhaHeader head = entries.nextElement();
                contentSize += head.getOriginalSize();
                if (maxContentSize != -1 && contentSize > maxContentSize) {
                    throw new MaxLengthExceededException("Extracted size is " + contentSize + " > " + maxContentSize);
                }

            ZipArchiveEntry entry = null;
            long contentSize = 0;
            while ((entry = (ZipArchiveEntry) ais.getNextEntry()) != null) {
                contentSize += entry.getSize();
                if (maxContentSize != -1 && contentSize > maxContentSize) {
                    throw new MaxLengthExceededException("Extracted size is " + contentSize + " > " + maxContentSize);
                }

    }

    public void test_toString_empty() {
        DocList docList = new DocList();
        String result = docList.toString();

        assertTrue(result.contains("contentSize=0"));
        assertTrue(result.contains("processingTime=0"));
        assertTrue(result.contains("elementData=[]"));
    }

    public void test_toString_with_data() {
        DocList docList = new DocList();

            TarArchiveEntry entry = null;
            long contentSize = 0;
            while ((entry = (TarArchiveEntry) ais.getNextEntry()) != null) {
                contentSize += entry.getSize();
                if (maxContentSize != -1 && contentSize > maxContentSize) {
                    throw new MaxLengthExceededException("Extracted size is " + contentSize + " > " + maxContentSize);
                }

        final String content = "TEST";
        final File contentFile = createContentFile(".txt", content.getBytes());

        final CommandExtractor extractor = new CommandExtractor();
        extractor.command = getCommand(scriptFile);
        final Map<String, String> params = new HashMap<String, String>();
        final ExtractData text = extractor.getText(new FileInputStream(contentFile), params);
        assertEquals(content, text.getContent());