从Struts Action（Liferay 6.2）的钩子中更改表单值

Question

我只是想更改来自表单的值。我已经钩住一个Struts Action，以更改该值，然后继续使用默认的processAction。但是它没有应用更改。

这是我的摘机代码：

public class EditRecordDisplayPortletAction extends BaseStrutsPortletAction {
    ...

    public void processAction(
            StrutsPortletAction originalStrutsPortletAction,
            PortletConfig portletConfig, ActionRequest actionRequest,
            ActionResponse actionResponse)
        throws Exception {
        ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

        ...
        //Stuff that is working here ...
        ...

        //Here I change the value that is comming from the form that should be used later:
        DynamicActionRequest dynamicActionRequest = null;
        Map<String, String[]> params = new HashMap();

        String observationInputKey = getObservationInputKey();
        params.put(observationInputKey, new String[]{"Here goes some text I have calculated in the hook."});
            dynamicActionRequest = new DynamicActionRequest(actionRequest, params, false);
        //Continues with the normal operation, but it's not using the new values:
        originalStrutsPortletAction.processAction(
            originalStrutsPortletAction, portletConfig, dynamicActionRequest,
            actionResponse);
    }
    ...

由于我无法更改DynamicActionRequest，因此我正在使用__actionRequest__。寻找更多信息，这里有人解释类似的东西，应该起作用： Wrap actionRequest with a DynamicActionRequest

Answer 1

按照您链接的论坛帖子的示例，您可以简化创建DynamicActionRequest的过程。请尝试：

public void processAction(
        StrutsPortletAction originalStrutsPortletAction,
        PortletConfig portletConfig, ActionRequest actionRequest,
        ActionResponse actionResponse)
    throws Exception {
    ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

    ...
    //Stuff that is working here ...
    ...

    DynamicActionRequest dynamicActionRequest = new DynamicActionRequest(actionRequest);

    String observationInputKey = getObservationInputKey();
    dynamicActionRequest.setParameter(observationInputKey, "Here goes some text I have calculated in the hook.");

    //Continues with the normal operation, but it's not using the new values:
    originalStrutsPortletAction.processAction(
        originalStrutsPortletAction, portletConfig, dynamicActionRequest,
        actionResponse);
}
...

诚然，javadoc for DynamicActionRequest所包含的方法名称不多，但您要为构造函数指定布尔参数inherit作为false。那可能是您唯一的问题。