Use of boolean variables in BPEL switch statements

I have a workflow with a single boolean input parameter:
<element name="input" type="boolean"/>
I wish to use a switch statement within the workflow, based on the value of that boolean parameter.
When I use the following XPath expression:
bpws:getVariableData("input","payload","/tns:BooleanRequest/tns:input")
I get the correct functionality, although I get the following BPEL compiler warning:
" [bpelc] [Warning ORABPEL-10078]: return value of this expression may not be a boolean
[bpelc] [Description]: in line 35 of "C:\eclipse\workspace\Boolean\Boolean.bpel", xpath expression "bpws:getVariableData("input","payload","/tns:BooleanRequest/tns:input")" used in <switch> may not return boolean type value, the xpath engine would automatically try to convert the return value to boolean..
[bpelc] [Potential fix]: Please use one of the built-in boolean functions from xpath http://www.w3.org/TR/xpath#section-Boolean-Functions to convert the return value to boolean.."
However, the boolean functions referenced do not appear to be relevant to a variable which is already of a boolean type. If I attempt to use the boolean() function in my XPath expression, I get rid of the compiler error, but the workflow now does not work as required.
How can I get rid of the compiler warning and still get the required functionality, and/or am I doing the wrong thing?
I am currently running on JBoss, with BPEL release 2.1.2 [build #1226].
Thanks for any help or ideas.

Hi Marlon,
Thanks for that - I guess we have to accept the vagaries of XPath and the absence of type-checking for variables.
I hadn't fully understood until I started investigating that I can assign ANY string to variable of type xsd:boolean, which has been the cause of some of the confusion for me - whether that value is then considered true or false depends on how you write your test condition.
I tried with your condition, and it didn't seem to work (evaluated to true if the variable data was the string "true()", but otherwise it seemed to always evaluate to false.
I also tried the following:
condition="bpws:getVariableData('booleanVariable')=true()"
but that evaluates to true for any string of length > 0.
The only one I can get to consistently work is:
condition="bpws:getVariableData('booleanVariable')=string(true())"
although that means that variable data of "TRUE" will evaluate to false (may well be the correct behaviour, depending on how you're setting the boolean variable in the first place).

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I have a Boolean button set to "Switch When Released" operation. When I press this button (now it's in the On state) I want to run a loop that does something continupously (for now, let's say it displays a simulated sine wave) until I press the button again (now the button is in the Off state) in which case, I want to end the loop. I am wiring my button to the loop condition that's set to "Continue if true" and have a "Wait Until Next ms Multiple" of 200 ms (I tried up to 500 ms). When I run the VI and press the button the first time, I see the sine wave displayed. But when I press the button again, nothing happens. It looks like it does not respond to the user interface. What's happening. What am I doing wrong? I'm using an Event Handler design pattern. I've also tried the Producer/Consumer (Events) design pattern. But I don't imagine the particular design pattern should make a difference. I've attached my code. Thanx.
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A simple solution would be to harness the timeout event, where you would put your data simulation. No need for parallel loops and local variables.
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Hi,
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Greetings;
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that shouldn't compile. don't you see an error message about your boolean being assigned an int? you are publishing for as3, correct?

USING MULTIPLE SELECT VARIABLE IN A SQL STATEMENT

In HTMLDB, the value of the parameter of a multiple select box is colon delimited(ie P6_Name = Smith:Jones:Burke). Is there an easy way to use this parameter in a SQL statement?
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Select *
from names
where
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Select *
from names
where
Name IN ('Smith','Jones','Burke')
Thank you

Thank you for your response! I'm an idiot. It didn't make sense to me because your talking about a multi-select variable and I was thinking about a select-list variable. My problem is that I need to assign a list of values to one select list item.
 
For example:
 
SELECT * FROM EMPLOYEE
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With the select list as
 
Display value = All Types, Some Types, One Specific Type 
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Try this: '@{Fscl_Qtr_Var}'

How to use bind variable in this select statement

Hi,
I have created this procedure where table name and fieldname is variable as they vary, therefore i passed them as parameter. This procedure will trim leading (.) if first five char is '.THE''. The procedure performs the required task. I want to make select statement with bind variable is there any possibility to use a bind variable in this select statement.
the procedure is given below:
create or replace procedure test(tablename in varchar2, fieldname IN varchar2)
authid current_user
is
type poicurtype is ref cursor;
poi_cur poicurtype;
sqlst varchar2(250);
THEVALUE NUMBER;
begin
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Best Regards,

So you want to amend each row individually? Is there some reason you're trying to make this procedure run as slow as possible?
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authid current_user
is
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Continue in a switch statement

What is the difference between using unlabelled continue and break in a switch statement?
Looks like there is the same effect but I didn't found anything about using continue in switch in any documentation.
Here's a typical explanation of using switch statement:
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Is it a good practise to use continue instead of break in such case?

Books are right again :))
Thanks everybody who wrote here.
As I found out continue is only for use in the loop statements. I just use continue inside both for and switch statements and that's why I thought that it's appropriate to use it inside switch. No way!! In this way continue will affect only loop, not switch statement.
For example:
class BreakTest {
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          int count_in_for = 0;
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               count_in_for++;
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               count_in_for++;
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count_in_switch=1 count_in_for=*1*
count_in_switch=1 count_in_for=*7*
In case of using continue you won't get to count_in_for++; - you'll jump to the next iteration of for loop.
In case of using break you'll go out of switch and go to next statement, that goes after switch block

Switch statement loops

Hi,
I was just wondering if there is any way to make a switch statement loop back on itself, for example if you want to use the default part of the switch statement check the validity of the inputs themselves and ask for a replacement input should the data not meet the criteria?
Thanks,
Luke.

I was just wondering if there is any way to make a
switch statement loop back on itself, for example if
you want to use the default part of the switch
statement check the validity of the inputs themselves
and ask for a replacement input should the data not
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Compiler error when useing switch statements in an inner class

I have defined several constants in a class and want to use this constans also in an inner class.
All the constants are defined as private static final int.
All works fine except when useing the switch statement in the inner class. I get the compiler error ""constant expression required". If I change the definition from private static final to protected static final it works, but why?
What's the difference?
Look at an example:
public class Switchtest
 private static final int AA = 0;
 protected static final int BB = 1;
 private static int i = 0;
 public Switchtest()
 i = 0; // <- OK
 switch(i)
 case AA: break; //<- OK, funny no problem
 case BB: break; //<- OK
 default: break;
private class InnerClass
 public InnerClass()
 i = 0; // <- OK: is accessible
 if (AA == i) // <- OK: AA is seen by the inner class; i is also accessible
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 case AA: break; // <- STRANGE?! Fail: Constant expression required
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}Thank's a lot for an explanation.

Just a though:
Maybe some subclass of Switchtest could decalare its own variable AA that is not final, but it can not declare its own BB because it is visible from the superclass. Therefore the compiler can not know for sure that AA is final.

Using a Switch statement for Infix to Prefix Expressions

I am stuck on the numeric and operator portion of the switch statement...I have the problem also figured out in an if/else if statement and it works fine, but the requirements were for the following algorithm:
while not end of expression
switch next token of expression
case space:
case left parenthesis:
skip it
case numeric:
push the string onto the stack of operands
case operator:
push the operator onto the stack of operators
case right parenthesis:
pop two operands from operand stack
pop one operator from operator stack
form a string onto operand stack
push the string onto operand stack
pop the final result off the operand stack
I know that typically case/switch statement's can only be done via char and int's. As I said I am stuck and hoping to get some pointers. This is for a homework assignment but I am really hoping for a few pointers. I am using a linked stack class as that was also the requirements. Here is the code that I have:
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   import java.util.*;
   import java.lang.*;
/*--------------------------- PUBLIC CLASS INFIXTOPREFIX --------------------------------------*/
/*-------------------------- INFIX TO PREFIX EXPRESSIONS --------------------------------------*/
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   /*------------- CONVERSION OF AN INFIX EXPRESSION TO A PREFIX EXPRESSION ------------*/
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                  break;
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                  operators.push(symbol);                                             // push the operator onto the stack of operators
                  break;
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                  operandB = (String)operands.pop();     // pop off second operand
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         outcome = (String)operands.pop();     // pop off the outcome
         return outcome;     // return outcome
      }     // end method prefix
   }     // end class infixToPrefixAny help would be greatly appreciated!

so, i did what flounder suggested:
         char e = expression.charAt(0);
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               case ' ':
                  break;     // accounting for spaces
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                  break;     // skipping the left parenthesis
               case '0':
               case '1':
               case '2':
               case '3':
               case '4':
               case '5':
               case '6':
               case '7':
               case '8':
               case '9':
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                  break;                               // case numeric
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               case '-':
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Exception in thread "main" java.lang.NullPointerException
     at LinkedStack$Node.access$100(LinkedStack.java:11)
     at LinkedStack.pop(LinkedStack.java:44)
     at infixToPrefix.prefix(infixToPrefix.java:119)
     at infixToPrefix.main(infixToPrefix.java:59)
Any ideas as to why? I am still looking through seeing if I can't figure it out, but any suggestions? Here is the linked stack code:
    public class LinkedStack {
   /*--------------- LINKED LIST NODE ---------------*/
       private class Node {
         private Object data;
         private Node previous;
      }     // end class node
   /*-------------- VARIABLES --------------*/
      private Node top;
/*-- Push Method: pushes object onto LinkedStack --*/
       public void push(Object data) {
         Node newTop = new Node();
         newTop.data = data;
         newTop.previous = top;
         top = newTop;
      }     // end function push
   /*--- Pop Method: pop obejct off of LinkedStack ---*/
       public Object pop()      {
         Object data = top.data;
         top = top.previous;
         return data;
      }     // end function pop
   } // end class linked stackEdited by: drmsndrgns on Mar 12, 2008 8:10 AM
Edited by: drmsndrgns on Mar 12, 2008 8:14 AM
Edited by: drmsndrgns on Mar 12, 2008 8:26 AM

Switch statement and case variables

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I can't even get this to compile when the value of the case label is obvious at compile time :
public class Switchtest
public static void main(String[] args)
int test = 0;
final int x;
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If jvm can use a hashtable for a switch statement. This hashtable is as constant as the compiled code, i.e., it can be defined at compile- time and it con not be modified runtime. Therefore a switch- case construction is faster than an else-if construction. But the strength of else- if is that it is more flexible. If you want to test on multiple variable values, you must use else-if
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HELP -menu using a switch statement

Hello to all. I'm new to the Java world, but currently taking my first Java class online. Not sure if this is the right place, but I need some help. In short I need to write a program that gives the user a menu to chose from using a switch statement. The switch statement should include a while statement so the user can make more than one selection on the menu and provide an option to exit the program.
With in the program I am to give an output of all counting numbers (6 numbers per line).
Can anyone help me with this?? If I'm not asking the right question please let me know or point me in the direction that can help me out.
Thanks in advance.
Here is what I have so far:
import java.util.*;
public class DoWhileDemo
 public static void main(String[] args)
 int count, number;
 System.out.println("Enter a number");
 Scanner keyboard = new Scanner (System.in);
 number = keyboard.nextInt();
 count = number;
 do
 System.out.print(count +",");
 count++;
 }while (count <= 32);
 System.out.println();
 System.out.println("Buckle my shoe.");
}

Thanks for the reply. I will tk a look at the link that was provided. However, I have started working on the problem, but can't get the 6 numbers per line. I am trying to figure out the problem in parts. Right now I'm working on the numbers, then the menu, and so on.
Should I tk this approach or another?
Again, thanks for the reply.

How do I use a variable within a sql statement

I am trying to use a local variable within an open SQL step but I keep getting an error.
My sql command looks like this "SELECT BoardDetailID FROM BoardDetails WHERE SerialNumber = " + locals.CurrentSerialNo
If I replace the locals.CurrentSerialNo with an actual value such as below the statement works fine.
"SELECT BoardDetailID FROM BoardDetails WHERE SerialNumber = " + " 'ABC001' "
Can someone tell me how to correctly format the statement to use a variable?

Hi,
Thanks for the reply. I have changed the required variable to a string, but with no success. I have reattached my updated sequence file and an image of the error.
When looking at the Data operation step I see that the sql statement is missing everything after the last quotation mark.
Thanks again,
Stuart
Attachments:
Database Test Sequence.seq ‏10 KB
TestStand error.JPG ‏37 KB

Using Variables in a select statement through a Database Adapter

I was wondering how I reference a variable in a select statement through a Database Adapter.
Ex.
1. I have a global variable that stores an employee number
2. I want to select an SSN # from a table based on an employee #
variable.
select ssn from emp where ssn = :input_variable - ????
- how do i reference the variable - I am getting a 'missing IN or OUT parameter error?
Any advice is much appreciated.
~Thanks

I'm just wondering if anyone knows a work around so that I might be able to store a Table's FIELD name in a variable or an array[] so that I can do a query based on the decision of a loop without having to code 10 IF/ELSE statements.For instance, although the above code will not work, this code, although quite lengthy, does:
If DataGrid1.SelStartCol = 0 Then
Adodc1.RecordSource = "Select * from tblReservation order by RES__PUR_DT"
Adodc1.Refresh
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Adodc1.RecordSource = "Select * from tblReservation order by VENDOR"
Adodc1.Refresh
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Adodc1.RecordSource = "Select * from tblReservation order by VEN_LOC"
Adodc1.Refresh
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Adodc1.RecordSource = "Select * from tblReservation order by RES_TYPE"
Adodc1.Refresh
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Adodc1.RecordSource = "Select * from tblReservation order by RES_TO_DT"
Adodc1.Refresh
ElseIf DataGrid1.SelStartCol = 6 Then
Adodc1.RecordSource = "Select * from tblReservation order by MISC_ADJ"
Adodc1.Refresh
ElseIf DataGrid1.SelStartCol = 7 Then
Adodc1.RecordSource = "Select * from tblReservation order by STATE_TAX"
Adodc1.Refresh
ElseIf DataGrid1.SelStartCol = 8 Then
Adodc1.RecordSource = "Select * from tblReservation order by LOC_CHARGE"
Adodc1.Refresh
ElseIf DataGrid1.SelStartCol = 9 Then
Adodc1.RecordSource = "Select * from tblReservation order by RES_ID"
Adodc1.Refresh
ElseIf DataGrid1.SelStartCol = 10 Then
Adodc1.RecordSource = "Select * from tblReservation order by RES_OP"
Adodc1.Refresh
End If
Do you see where i'm going with this?
I simple want to use a variable in the "select * from <Table> Order by <Field>"

Use of boolean variables in BPEL switch statements

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