Richfaces自定义组件渲染器问题

问题描述

| 我已经创建了一个自定义组件，下面是该组件的渲染器，一开始该组件就可以渲染，但是AjaxOuputPanel永远不会在每个ajax请求中再次渲染...所以代码是什么问题呢 同样在添加了HtmlAjaxOutputPanel类型的子组件的任何组件上重复这种情况，该组件在开始时呈现OK，但是ajax out面板再也没有呈现...组件代码： 包eg.com.etisalat.web.rich.components.inputtext;

import java.io.IOException;

import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.html.HtmlGraphicImage;
import javax.faces.component.html.HtmlInputText;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import org.ajax4jsf.component.UIAjaxOutputPanel;
import org.ajax4jsf.component.html.HtmlAjaxOutputPanel;
import org.ajax4jsf.renderkit.AjaxComponentRendererBase;

public class InputTextRenderer extends AjaxComponentRendererBase {

    @SuppressWarnings({ \"rawtypes\",\"unchecked\" })
    @Override
    protected Class getComponentClass() {
        return eg.com.etisalat.web.rich.components.inputtext.HtmlInputText.class;
    }

    public void doEncodeBegin(ResponseWriter writer,FacesContext context,UIComponent component) throws IOException {

        ELContext elContext = context.getELContext();
        Application app = context.getApplication();
        ExpressionFactory exprFactory = app.getExpressionFactory();

        String clientId = component.getClientId(context);
        String componentId = component.getId();
        component.getChildren().clear();

        String readonly = (String) component.getAttributes().get(Constants.ATT_READ_ONLY);
        String styleClass = (String) component.getAttributes().get(Constants.ATT_STYLE_CLASS);
        String required = (String) component.getAttributes().get(Constants.ATT_required);
        String requiredMessage = (String) component.getAttributes().get(Constants.ATT_required_MESSAGE);

        writer.startElement(\"div\",component);
        getUtils().writeAttribute(writer,\"id\",clientId);

        String inputFieldId = componentId + \"InputField\";

        javax.faces.component.html.HtmlInputText inputTextCom = new HtmlInputText();
        inputTextCom.setId(inputFieldId);

        inputTextCom.setonchange(inputFieldId + \"StoredValue = this.value\");

        if (null != readonly) inputTextCom.setReadonly(Boolean.parseBoolean(readonly));
        if (null != styleClass) inputTextCom.setStyleClass(styleClass);
        if (null != required) inputTextCom.setrequired(Boolean.parseBoolean(required));
        if (null != requiredMessage) inputTextCom.setrequiredMessage(requiredMessage);

        component.getChildren().add(inputTextCom);

        if(null != required && Boolean.parseBoolean(required)) {
            HtmlAjaxOutputPanel outpanel = new HtmlAjaxOutputPanel();
            outpanel.setId(componentId + \"InputFieldValidation\");
            outpanel.setAjaxRendered(true);

            HtmlGraphicImage icon = new HtmlGraphicImage();
            icon.setUrl((String)exprFactory.createValueExpression(elContext,\"\" +
                    \"#{(not empty webUtil.messagesMap[\'\" + inputFieldId + \"\']) ? \'/images/info_red_16_16_.png\' : \" +
                            \"\'/images/info_yellow_16_16_.png\'}\",String.class).getValue(elContext));
            icon.setStyleClass(\"errorIcon\");
            icon.setTitle(requiredMessage);

            outpanel.getChildren().add(icon);
            component.getChildren().add(outpanel);
        }

        String elementId = inputTextCom.getClientId(context);

        writer.startElement(\"script\",component);
        writer.writeAttribute(\"type\",\"text/javascript\",null);
        writer.write(\"if(typeof \" + inputFieldId + \"StoredValue != \\\"undefined\\\") document.getElementById(\'\" + 
                elementId + \"\').value = \" + inputFieldId + \"StoredValue;\");
        writer.endElement(\"script\");
    }

    @Override
    protected void doEncodeEnd(ResponseWriter writer,UIComponent component) throws IOException {
        writer.endElement(\"div\");
    }
}

    

解决方法

好的，我发现了问题所在，它是facelets.REFRESH_PERIOD的问题，如果此属性为正值，将使ui树可以使用原始文档中的每个请求进行重建（调用facelets刷新方法） 所以解决方案是通过将该属性设置为-1来禁用该属性