public void save()

in src/main/java/org/apache/commons/configuration2/PropertiesConfigurationLayout.java [479:521]
33 lines of code
11 McCabe index (conditional complexity)

    public void save(final PropertiesConfiguration config, final Writer writer) throws ConfigurationException {
        try {
            @SuppressWarnings("resource") // createPropertiesReader wraps the writer.
            final PropertiesConfiguration.PropertiesWriter pWriter = config.getIOFactory().createPropertiesWriter(writer, config.getListDelimiterHandler());
            pWriter.setGlobalSeparator(getGlobalSeparator());
            if (getLineSeparator() != null) {
                pWriter.setLineSeparator(getLineSeparator());
            }

            if (headerComment != null) {
                writeComment(pWriter, getCanonicalHeaderComment(true));
            }

            boolean firstKey = true;
            for (final String key : getKeys()) {
                if (config.containsKeyInternal(key)) {
                    // preset header comment needs to be separated from key
                    if (firstKey && headerComment != null && getBlankLinesBefore(key) == 0) {
                        pWriter.writeln(null);
                    }

                    // Output blank lines before property
                    for (int i = 0; i < getBlankLinesBefore(key); i++) {
                        pWriter.writeln(null);
                    }

                    // Output the comment
                    writeComment(pWriter, getCanonicalComment(key, true));

                    // Output the property and its value
                    final boolean singleLine = isForceSingleLine() || isSingleLine(key);
                    pWriter.setCurrentSeparator(getSeparator(key));
                    pWriter.writeProperty(key, config.getPropertyInternal(key), singleLine);
                }
                firstKey = false;
            }

            writeComment(pWriter, getCanonicalFooterCooment(true));
            pWriter.flush();
        } catch (final IOException ioex) {
            throw new ConfigurationException(ioex);
        }
    }