基于AJAX和JSF打造丰富的互联网组件之应用篇(1)(3)

public void encodeEnd(
FacesContext context，
UIComponent component) throws IOException
{
String valueString = _getValueAsString(context， component);
String clientId = component.getClientId(context);
Map attrs = component.getAttributes();
String title = (String)attrs.get(TITLE_ATTR);
String onchange = (String)attrs.get(ONCHANGE_ATTR);
MethodBinding doSuggest = (MethodBinding)attrs.get(DO_SUGGEST_ATTR);
ResponseWriter out = context.getResponseWriter();
out.startElement("div"， component);
if (title != null)
out.writeAttribute("title"， title， TITLE_ATTR);
// // value="[converted-value]" onchange="[onchange]" />
out.startElement("input"， component);
out.writeAttribute("id"， clientId， null);
out.writeAttribute("name"， clientId， null);
if (valueString != null)
out.writeAttribute("value"， valueString， null);
if (doSuggest != null)
{
//当使用服务器端建议时，禁止浏览器自动完成功能
out.writeAttribute("autocomplete"， "off"， null);
String expression = doSuggest.getExpressionString();
//从表达式中修整#{}
String bindingRef = 
expression.substring(2， expression.length() - 1);
ViewHandler handler = 
context.getApplication().getViewHandler();
String doSuggestURL = 
handler.getResourceURL(context， "mabon:/" + bindingRef);
out.writeAttribute("onkeypress"， 
"return projsf.jdj.doKeyPress(event);"， null);
out.writeAttribute("onkeyup"， 
"return projsf.jdj.doKeyUp(event);"， null);
out.writeAttribute("onchange"， 
"projsf.jdj.doChange(event， '" + doSuggestURL 
+ "');"， null);
out.writeAttribute("onblur"， 
"return projsf.jdj.doBlur(event);"， null);
}
out.endElement("input");
out.startElement("br"， null);
out.endElement("br");
out.startElement("div"， null);
out.writeAttribute("id"， clientId + "$suggest"， null);
out.writeAttribute("class"， "HtmlInputSuggest"， null);
out.endElement("div");
}

http://java.sun.com/JSP/Page" version="1.2"
xmlns:jdj="http://projsf.apress.com/jdj" 
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html" >








title="Input Suggest Component" 
value="#{backingBean.value}"
doSuggest="#{backingBean.doSuggest}" />

package com.apress.projsf.jdj.application;
import java.util.ArrayList;
import java.util.List;
/**
*BackingBean是一个inputSuggest.jspx文档的支持bean。
*/
public class BackingBean{
public void setValue(Object value) { _value = value; }
public Object getValue() { return _value; }

public String[] doSuggest(String initialValue) {
List suggestions = new ArrayList();
for (int i=0; i < _MASTER_LIST.length; i++) {
if (_MASTER_LIST[i].startsWith(initialValue))
suggestions.add(_MASTER_LIST[i]);
}
return suggestions.toArray(new String[0]);
}
private Object _value;
static private final String[] _MASTER_LIST = new String[]
{
"Pro JSF and Ajax"，
"Pro Ajax"，
"Pro JSP 2"，
"Pro Jakarta"，
"Pro J2EE 1.4"
};
}