BBjJettyContext::containsAttribute


Description

In BBj 15.0 and higher, this method checks for the existence of a named attribute.

Syntax

Return Value

Method

boolean

containsAttribute(string name)

Parameters

Variable

Description

name

the name of the attribute

Return Value

return true if the attribute exists otherwise false.

Remarks

The BBjJettyContext provides a repository for run-time attributes which are stored as a name - value pair.

Example

declare BBjServletData data!
data! = BBjAPI().getServletData()

declare MyServlet myServlet!
myServlet! = new MyServlet()
data!.setCallback(data!.ON_WEB_CONNECTION, myServlet!, "myMethod")

PROCESS_EVENTS

class public MyServlet

  field private BBjNumber chan
  field private BBjHttpSession session!
  field private BBjHttpRequest request!
  field private BBjHttpResponse response!
  field private BBjJettyContext context!
  
  method public void myMethod(BBjServletEvent p_event!)
    #chan = UNT
    #request! = cast(BBjHttpRequest,p_event!.getHttpRequest())
    #session! = cast(BBjHttpSession,#request!.getSession())
    #context! = cast(BBjJettyContext,#session!.getContext())
    
    #response! = p_event!.getHttpResponse()
    #response!.setContentType("text/html")
    open (#chan)"JSERVLET"
    
    print (#chan)"<html>"
    print (#chan)"<body>"
    print (#chan)"<h1>>BBj Context Test</h1>"
    print (#chan)"<h3>Running in context<b>"
    print (#chan)#context!.getContextName()
    print (#chan)"</b></h3>"
    print (#chan)"<hr>"
    #renderAttributes()
    print (#chan)"</body>"
    print (#chan)"</html>"
    close (#chan)
  methodend

  method public void renderAttributes()
    vectAttribNames! = #context!.getAttributeNames()
    print (#chan)"<table>"
    print (#chan)"<tr>"
    print (#chan)"<td>Attribute Name</td>"
    print (#chan)"<td> </td>"
    print (#chan)"<td>value</td>"
    print (#chan)"</tr>"
    if vectAttribNames!.size() then
      for i = 0 to vectAttribNames!.size() -1
        n$ = vectAttribNames!.get(i)
        o! = #context!.getAttribute(n$)
        isMyClass = 0
        mc! = cast(MyClass,o!, err = *next); isMyClass = 1
        if isMyClass then
            v$ = mc!.getFirstName() + " " + mc!.getLastName()
        else
            v$ = str(o!)
        endif
        print (#chan)"<tr>"
        print (#chan)"<td>" + n$ + "</td>"
        print (#chan)"<td />"
        print (#chan)"<td>" + v$ +"</td>"
        print (#chan)"</form>"
        print (#chan)"</tr>"
      next i
    endif
    print (#chan)"</form>"
    print (#chan)"</table>"
  methodend

classend

See Also

BBjAPI

BBjServletEvent

BBjJettyContext