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Company类结构图

JXPathContext context = JXPathContext.newContext(company);
Company c = (Company)context.getValue(".");

Employee emp = (Employee)context.getValue("/departmentList/employees[name='Johnny']");

Employee emp = 
   (Employee)context.getValue("/departmentList/employees[name='Susan' and age=27]");

context.getVariables().declareVariable("name", "Susan");
context.getVariables().declareVariable("age", new Integer(27));
Employee emp = 
   (Employee)context.getValue("/departmentList/employees[name=$name and age=$age]");

for(Iterator iter = context.iterate("/departmentList"); iter.hasNext();){
   Department d = (Department)iter.next();
   //...
}

for(Iterator iter = context.iterate("/departmentList/employees"); iter.hasNext();){
   Employee emp = (Employee)iter.next();
   //...
}

 for(Iterator iter = context.iterate
     ("/departmentList[name='Sales']/employees[age>30]"); iter.hasNext();){
   Employee emp = (Employee)iter.next();
   //...
}

context.getVariables().declareVariable("deptName", "Sales");
context.getVariables().declareVariable("minAge", new Integer(30));
for(Iterator iter = context.iterate("/departmentList
     [name=$deptName]/employees[age>$minAge]"); iter.hasNext();){
   Employee emp = (Employee)iter.next();
   //...
}

JXPathContext context = JXPathContext.newContext(company);
Pointer empPtr = context.getPointer("/departmentList[name='Sales']/employees[age>40]");

System.out.println(empPtr);
//output: /departmentList[1]/employees[1]

System.out.println(((Employee)empPtr.getValue()).getName());
//output: Johnny

for(Iterator iter = context.iteratePointers("/departmentList[name='Sales']
     /employees[age>30]"); iter.hasNext();){
   Pointer empPtr = (Pointer)iter.next();
   //...
}

for(Iterator iter = context.iteratePointers("/departmentList[name='Sales']
     /employees[age>30]"); iter.hasNext();){
   Pointer empPtr = (Pointer)iter.next();
   JXPathContext relativeContext = context.getRelativeContext(empPtr);
}

//Current employee
Employee emp = (Employee)relativeContext.getValue(".");

//Employee name
String name = (String)relativeContext.getValue("./name");

//Name of the Department this Employee belongs to (a parent object)
String deptName = (String)relativeContext.getValue("../name");

//Name of the Company this Employee belongs to (a 'grandparent' object)
String compName = (String)relativeContext.getValue("../../name");

//All coworkers of this Employee (sibling objects)
for(Iterator empIter = relativeContext.iterate("../employees"); empIter.hasNext();){
   Employee colleague = (Employee)empIter.next();
   //...
}

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二十分钟Ruby入门

作者：cleverpig

• 搜狐网站诚聘Java、PHP和C++工程师
• 北京: 千橡集团暨校内网诚聘软件研发工程师

AJAX真的不安全？！

作者：cleverpig

http://websiteA/proxy?url=http://websitesB/ 

我们如何吃下这袋中甜点？

• 北京: 千橡集团暨校内网诚聘软件研发工程师
• 搜狐网站诚聘Java、PHP和C++工程师

Think in Pushlet

作者：cleverpig

极富生活韵味的“Urban Stream”把我们Connecting Together

java 代码
 
<%   
  int i = 1;  
      
  try {  
    while (true) {  
       out.print("
"+(i++)+"
");  
       out.flush();  
        
       try {  
            Thread.sleep(3000);  
       } catch (InterruptedException e) {  
       out.print("
"+e+"
");  
        }  
     }  
   } catch (Exception e) {  
       out.print("
"+e+"
");  
   }  
%>  

java 代码
 
 7: <%   
 8:   /** Start a line of JavaScript with a function call to parent frame. */  
 9:   String jsFunPre = "parent.push('";  
10:     
11:   /** End the line of JavaScript */  
12:   String jsFunPost = "') ";  
13:     
14:   int i = 1;  
15:   try {  
16:     
17:     // Every three seconds a line of JavaScript is pushed to the client  
18:     while (true) {  
19:       
20:        // Push a line of JavaScript to the client   
21:        out.print(jsFunPre+"Page "+(i++)+jsFunPost);  
22:        out.flush();  
23:          
24:        // Sleep three secs  
25:        try {  
26:             Thread.sleep(3000);  
27:        } catch (InterruptedException e) {  
28:             // Let client display exception   
29:             out.print(jsFunPre+"InterruptedException: "+e+jsFunPost);  
30:        }  
31:      }  
32:    } catch (Exception e) {  
33:             // Let client display exception   
34:             out.print(jsFunPre+"Exception: "+e+jsFunPost);  
35:    }  
36: %>   

js 代码
 
"JavaScript">  
var pageStart="
Server pushes: 
";  
var pageEnd="";  
  // Callback function with message from server.  
  // This function is called from within the hidden JSP pushlet frame  
  function push(content) {  
   
    // Refresh the display frame with the content received  
    window.frames['displayFrame'].document.writeln(pageStart+content+pageEnd);  
    window.frames['displayFrame'].document.close();  
  }  
  
  
  
  
  
       
       
       
       
       
  

WAIT...

Pushlet框架Java类UML图

js 代码
 
http://www.fluidiom.com:8080/servlet/pushlet?subject="/stocks/aex"  

浏览器client订阅程序图

事件发布程序图

js 代码
parent.push('subject', '/stocks/aex', 'philips', '123.45')   

js 代码
 
/* Object to represent nl.justobjects.pushlet.Event in JavaScript.  
   Arguments are an array where args[i] is name and args[i+1] is value  
*/  
function PushletEvent(args) {  
   // Map存放Name/Value pairs  
   this.map = new Map();  
     
   // 设置成员方法  
   this.getSubject = PushletEventGetSubject  
   this.put = PushletEventPut  
   this.get = PushletEventGet  
   this.toString = PushletEventToString  
   this.toTable = PushletEventToTable  
  
   // 将传入的参数值放入到map中  
   for (var i=0; i < args.length; i++) {  
     this.put(args[i], args[++i] );  
   }  
}  
  
// 获取事件主题  
function PushletEventGetSubject() {  
  return this.map.get('subject')  
}  
  
// 获取事件属性  
function PushletEventGet(name) {  
  return this.map.get(name)  
}  
  
// 存放事件属性  
function PushletEventPut(name, value) {  
  return this.map.put(name, value)  
}  
  
function PushletEventToString() {  
  return this.map.toString();  
}  
  
// 将map内容转化为HTML Table  
function PushletEventToTable() {  
  return this.map.toTable();  
}