public CallbackWriter(Component bean,
    Writer writer) 
{
         
        this.bean = bean;
        this.writer = writer;
        if (bean.usesBody()) {
            this.body = new StringWriter();
        }
}

 public int afterBody() throws IOException, TemplateModelException 
{
        afterBody = true;
        boolean result = bean.end(this, bean.usesBody() ? body.toString() : "");
        if (result) {
            return REPEAT_EVALUATION;
        } else {
            return END_EVALUATION;
        }
}

 public  void close() throws IOException 
{
        if (bean.usesBody()) {
            body.close();
        }
}

 public  void flush() throws IOException 
{
        writer.flush();
        if (bean.usesBody()) {
            body.flush();
        }
}

 public Component getBean() 
{
        return bean;
}

 public  void onError(Throwable throwable) throws Throwable 
{
        throw throwable;
}

 public int onStart() throws IOException, TemplateModelException 
{
        boolean result = bean.start(this);
        if (result) {
            return EVALUATE_BODY;
        } else {
            return SKIP_BODY;
        }
}

 public  void write(char[] cbuf,
    int off,
    int len) throws IOException 
{
        if (bean.usesBody() && !afterBody) {
            body.write(cbuf, off, len);
        } else {
            writer.write(cbuf, off, len);
        }
}