Richfaces自定义组件渲染器问题

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, FacesContext context,
            UIComponent component) throws IOException {
        writer.endElement(\"div\");
    }
}