public void doTag()

in core/src/main/java/org/apache/commons/jelly/impl/DynamicBeanTag.java [107:170]
47 lines of code
12 McCabe index (conditional complexity)

    public void doTag(XMLOutput output) throws JellyTagException {

        // lets find any attributes that are not set and
        for ( Iterator iter = attributes.values().iterator(); iter.hasNext(); ) {
            Attribute attribute = (Attribute) iter.next();
            String name = attribute.getName();
            if ( ! setAttributesSet.contains( name ) ) {
                if ( attribute.isRequired() ) {
                    throw new MissingAttributeException(name);
                }
                // lets get the default value
                Object value = null;
                Expression expression = attribute.getDefaultValue();
                if ( expression != null ) {
                    value = expression.evaluate(context);
                }

                // only set non-null values?
                if ( value != null ) {
                    super.setAttribute(name, value);
                }
            }
        }

        // If the dynamic bean is itself a tag, let it execute itself
        if (bean instanceof Tag)
        {
            Tag tag = (Tag) bean;
            tag.setBody(getBody());
            tag.setContext(getContext());
            tag.setParent(getParent());
            ((Tag) bean).doTag(output);

            return;
        }

        invokeBody(output);

        // export the bean if required
        if ( var != null ) {
            context.setVariable(var, bean);
        }

        // now, I may invoke the 'execute' method if I have one
        if ( method != null ) {
            try {
                method.invoke( bean, emptyArgs );
            }
            catch (IllegalAccessException e) {
                methodInvocationException(bean, method, e);
            }
            catch (IllegalArgumentException e) {
                methodInvocationException(bean, method, e);
            }
            catch (InvocationTargetException e) {
                // methodInvocationError(bean, method, e);

                Throwable inner = e.getTargetException();

                throw new JellyTagException(inner);

            }
        }
    }