private boolean parseCustomTag()

in src/main/java/org/apache/sling/scripting/jsp/jasper/compiler/Parser.java [1173:1266]
65 lines of code
12 McCabe index (conditional complexity)

    private boolean parseCustomTag(Node parent) throws JasperException {

        if (reader.peekChar() != '<') {
            return false;
        }

        // Parse 'CustomAction' production (tag prefix and custom action name)
        reader.nextChar(); // skip '<'
        String tagName = reader.parseToken(false);
        int i = tagName.indexOf(':');
        if (i == -1) {
            reader.reset(start);
            return false;
        }

        String prefix = tagName.substring(0, i);
        String shortTagName = tagName.substring(i + 1);

        // Check if this is a user-defined tag.
        String uri = pageInfo.getURI(prefix);
        if (uri == null) {
            reader.reset(start);
            // Remember the prefix for later error checking
            pageInfo.putNonCustomTagPrefix(prefix, reader.mark());
            return false;
        }

        TagLibraryInfo tagLibInfo = pageInfo.getTaglib(uri);
        TagInfo tagInfo = tagLibInfo.getTag(shortTagName);
        TagFileInfo tagFileInfo = tagLibInfo.getTagFile(shortTagName);
        if (tagInfo == null && tagFileInfo == null) {
            err.jspError(start, "jsp.error.bad_tag", shortTagName, prefix);
        }
        Class tagHandlerClass = null;
        if (tagInfo != null) {
            // Must be a classic tag, load it here.
            // tag files will be loaded later, in TagFileProcessor
            String handlerClassName = tagInfo.getTagClassName();
            try {
                tagHandlerClass = ctxt.getClassLoader().loadClass(
                        handlerClassName);
            } catch (Exception e) {
                err.jspError(start, "jsp.error.loadclass.taghandler",
                        handlerClassName, tagName);
            }
        }

        // Parse 'CustomActionBody' production:
        // At this point we are committed - if anything fails, we produce
        // a translation error.

        // Parse 'Attributes' production:
        Attributes attrs = parseAttributes();
        reader.skipSpaces();

        // Parse 'CustomActionEnd' production:
        if (reader.matches("/>")) {
            if (tagInfo != null) {
                new Node.CustomTag(tagName, prefix, shortTagName, uri, attrs,
                        start, parent, tagInfo, tagHandlerClass);
            } else {
                new Node.CustomTag(tagName, prefix, shortTagName, uri, attrs,
                        start, parent, tagFileInfo);
            }
            return true;
        }

        // Now we parse one of 'CustomActionTagDependent',
        // 'CustomActionJSPContent', or 'CustomActionScriptlessContent'.
        // depending on body-content in TLD.

        // Looking for a body, it still can be empty; but if there is a
        // a tag body, its syntax would be dependent on the type of
        // body content declared in the TLD.
        String bc;
        if (tagInfo != null) {
            bc = tagInfo.getBodyContent();
        } else {
            bc = tagFileInfo.getTagInfo().getBodyContent();
        }

        Node tagNode = null;
        if (tagInfo != null) {
            tagNode = new Node.CustomTag(tagName, prefix, shortTagName, uri,
                    attrs, start, parent, tagInfo, tagHandlerClass);
        } else {
            tagNode = new Node.CustomTag(tagName, prefix, shortTagName, uri,
                    attrs, start, parent, tagFileInfo);
        }

        parseOptionalBody(tagNode, tagName, bc);

        return true;
    }