Method parseCustomTag

java/org/apache/jasper/compiler/Parser.java:1043–1139

(Node parent)

     * CustomActionScriptlessContent ::= ScriptlessOptionalBody
     */
    @SuppressWarnings("null") // tagFileInfo can't be null after initial test
    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) {
            if (pageInfo.isErrorOnUndeclaredNamespace()) {
                err.jspError(start, "jsp.error.undeclared_namespace", prefix);
            } else {
                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();