Replacing a text in Apache POI XWPF

Question

I just found Apache POI library very useful for editing Word files using Java. Specifically, I want to edit a DOCX file using Apache POI\'s XWPF classes. I

Answer 1

There is the replaceParagraph implementation that replaces ${key} with value (the fieldsForReport parameter) and saves format by merging runs contents ${key}.

private void replaceParagraph(XWPFParagraph paragraph, Map fieldsForReport) throws POIXMLException {
    String find, text, runsText;
    List runs;
    XWPFRun run, nextRun;
    for (String key : fieldsForReport.keySet()) {
        text = paragraph.getText();
        if (!text.contains("${"))
            return;
        find = "${" + key + "}";
        if (!text.contains(find))
            continue;
        runs = paragraph.getRuns();
        for (int i = 0; i < runs.size(); i++) {
            run = runs.get(i);
            runsText = run.getText(0);
            if (runsText.contains("${") || (runsText.contains("$") && runs.get(i + 1).getText(0).substring(0, 1).equals("{"))) {
                //As the next run may has a closed tag and an open tag at 
                //the same time, we have to be sure that our building string 
                //has a fully completed tags 
                while (!openTagCountIsEqualCloseTagCount(runsText))) {
                    nextRun = runs.get(i + 1);
                    runsText = runsText + nextRun.getText(0);
                    paragraph.removeRun(i + 1);
                }
                run.setText(runsText.contains(find) ?
                        runsText.replace(find, fieldsForReport.get(key)) :
                        runsText, 0);
            }
        }
    }
}

private boolean openTagCountIsEqualCloseTagCount(String runText) {
    int openTagCount = runText.split("\\$\\{", -1).length - 1;
    int closeTagCount = runText.split("}", -1).length - 1;
    return openTagCount == closeTagCount;
}

Implementation replaceParagraph

Unit test