private boolean processMetadataForHtml()

in doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java [181:215]

30 lines of code
5 McCabe index (conditional complexity)


    private boolean processMetadataForHtml(StringBuilder html, StringBuilder source) {
        final Map<String, List<String>> metadata;
        final int endOffset; // end of metadata within source
        // support two types of metadata:
        if (source.toString().startsWith("---")) {
            // 1. YAML front matter (https://github.com/vsch/flexmark-java/wiki/Extensions#yaml-front-matter)
            Node documentRoot = FLEXMARK_METADATA_PARSER.parse(source.toString());
            YamlFrontMatterVisitor visitor = new YamlFrontMatterVisitor();
            visitor.visit(documentRoot);
            metadata = visitor.getData();
            endOffset = visitor.getEndOffset();
        } else {
            // 2. Multimarkdown metadata (https://fletcher.github.io/MultiMarkdown-5/metadata.html), not yet supported
            // by Flexmark (https://github.com/vsch/flexmark-java/issues/550)
            metadata = new LinkedHashMap<>();
            Matcher metadataMatcher = METADATA_SECTION_PATTERN.matcher(source);
            if (metadataMatcher.find()) {
                String entry = metadataMatcher.group(0) + EOL;
                Matcher entryMatcher = METADATA_ENTRY_PATTERN.matcher(entry);
                while (entryMatcher.find()) {
                    String key = entryMatcher.group(1);
                    String value = normalizeMultilineValue(entryMatcher.group(2));
                    metadata.put(key, Collections.singletonList(value));
                }
                endOffset = metadataMatcher.end(0);
            } else {
                endOffset = 0;
            }
        }
        if (endOffset > 0) {
            // Trim the metadata from the source
            source.delete(0, endOffset);
        }
        return writeHtmlMetadata(html, metadata);
    }