Method parseAttributeValue

java/org/apache/jasper/compiler/Parser.java:254–285

AttributeValueDouble ::= (QuotedChar - '"') ('"' | <TRANSLATION_ERROR>) RTAttributeValueDouble ::= ((QuotedChar - '"') - ((QuotedChar-'"')'%>"') ('%>"' | TRANSLATION_ERROR)

(String qName, String watch, boolean ignoreEL)

     * ((QuotedChar - '"')* - ((QuotedChar-'"')'%>"') ('%>"' | TRANSLATION_ERROR)
     */
    private String parseAttributeValue(String qName, String watch, boolean ignoreEL) throws JasperException {
        boolean quoteAttributeEL = ctxt.getOptions().getQuoteAttributeEL();
        Mark start = reader.mark();
        // In terms of finding the end of the value, quoting EL is equivalent to
        // ignoring it.
        Mark stop = reader.skipUntilIgnoreEsc(watch, ignoreEL || quoteAttributeEL);
        if (stop == null) {
            err.jspError(start, "jsp.error.attribute.unterminated", qName);
        }

        String ret = null;
        try {
            char quote = watch.charAt(watch.length() - 1);

            // If watch is longer than 1 character this is a scripting
            // expression and EL is always ignored
            boolean isElIgnored = pageInfo.isELIgnored() || watch.length() > 1;

            ret = AttributeParser.getUnquoted(reader.getText(start, stop), quote, isElIgnored,
                    pageInfo.isDeferredSyntaxAllowedAsLiteral(), ctxt.getOptions().getStrictQuoteEscaping(),
                    quoteAttributeEL);
        } catch (IllegalArgumentException iae) {
            err.jspError(start, iae.getMessage());
        }
        if (watch.length() == 1) {
            return ret;
        }

        // Put back delimiter '<%=' and '%>', since they are needed if the
        // attribute does not allow RTexpression.
        return "<%=" + ret + "%>";
    }

    private String parseScriptText(String tx) {
        CharArrayWriter cw = new CharArrayWriter();