public void doExecute()

in core/src/main/java/org/apache/struts2/views/freemarker/FreemarkerResult.java [117:191]
63 lines of code
14 McCabe index (conditional complexity)

    public void doExecute(String locationArg, ActionInvocation invocation) throws IOException, TemplateException {
        this.location = locationArg;
        this.invocation = invocation;
        this.configuration = getConfiguration();
        this.wrapper = getObjectWrapper();

        ActionContext ctx = invocation.getInvocationContext();
        HttpServletRequest req = ctx.getServletRequest();

        String absoluteLocation;
        if (location.startsWith("/")) {
            absoluteLocation = location;
        } else {
            String namespace = invocation.getProxy().getNamespace();
            if (namespace == null || namespace.isEmpty() || namespace.equals("/")) {
                absoluteLocation = "/" + location;
            } else if (namespace.startsWith("/")) {
                absoluteLocation = namespace + "/" + location;
            } else {
                absoluteLocation = "/" + namespace + "/" + location;
            }
        }

        Template template = configuration.getTemplate(absoluteLocation, deduceLocale());
        TemplateModel model = createModel();

        // Give subclasses a chance to hook into preprocessing
        if (preTemplateProcess(template, model)) {
            try {
                final boolean willWriteIfCompleted;
                if (writeIfCompleted != null) {
                    willWriteIfCompleted = isWriteIfCompleted();
                } else {
                    willWriteIfCompleted = template.getTemplateExceptionHandler() == TemplateExceptionHandler.RETHROW_HANDLER;
                }

                // Process the template
                Writer writer = getWriter();
                if (willWriteIfCompleted) {
                    CharArrayWriter parentCharArrayWriter = (CharArrayWriter) req.getAttribute(PARENT_TEMPLATE_WRITER);
                    boolean isTopTemplate;
                    if (isTopTemplate = (parentCharArrayWriter == null)) {
                        //this is the top template
                        parentCharArrayWriter = new CharArrayWriter();
                        //set it in the request because when the "action" tag is used a new VS and ActionContext is created
                        req.setAttribute(PARENT_TEMPLATE_WRITER, parentCharArrayWriter);
                    }

                    try {
                        template.process(model, parentCharArrayWriter);

                        if (isTopTemplate) {
                            parentCharArrayWriter.flush();
                            parentCharArrayWriter.writeTo(writer);
                        }
                    } catch (TemplateException | IOException e) {
                        if (LOG.isErrorEnabled()) {
                            LOG.error("Error processing Freemarker result!", e);
                        }
                        throw e;
                    } finally {
                        if (isTopTemplate) {
                            req.removeAttribute(PARENT_TEMPLATE_WRITER);
                            parentCharArrayWriter.close();
                        }
                    }
                } else {
                    template.process(model, writer);
                }
            } finally {
                // Give subclasses a chance to hook into postprocessing
                postTemplateProcess(template, model);
            }
        }
    }