Hi Friends,
I am having a problem with empty strings. I have this simple build file:
<project name="test" default="test_iteration">
<taskdef resource="net/sf/antcontrib/antlib.xml" />
<target name="test_iteration">
<var name="counter" value="0"/>
<for list="parameter1,parameter2,parameter3" param="arg" >
<sequential>
<math result="counter" operand1="${counter}" operation="+"
operand2="1" datatype="int"/>
<var name="output.property" unset="true"/>
<java classname="GeneratePassword" fork="true">
<arg value="@{arg}" />
<redirector outputproperty="output.property" />
</java>
<if>
<equals arg1="${counter}" arg2="1"/>
<then>
<property name="property1" value="${output.property}" />
<echo>1:${property1}</echo>
</then>
<elseif>
<equals arg1="${counter}" arg2="2"/>
<then>
<property name="property2" value="${output.property}" />
<echo>2:${property2}</echo>
</then>
</elseif>
<elseif>
<equals arg1="${counter}" arg2="3"/>
<then>
<property name="property3" value="${output.property}" />
<echo>3:${property3}</echo>
</then>
</elseif>
</if>
</sequential>
</for>
</target>
</project>
output:
test_iteration:
[echo] 1:PARAMETER1
[echo] 2:PARAMETER2
[echo] 3:PARAMETER3
Now,if I pass the second parameter as EMPTY STRING i.e:
.....
<for list="parameter1,,parameter3" param="arg" >
....
Actual Output I get:
test_iteration:
[echo] 1:PARAMETER1
[echo] 2:PARAMETER3
Expected Output I get:
test_iteration:
[echo] 1:PARAMETER1
[echo] 3:PARAMETER3
So,can someone explain me when I pass in an empty string, why the second
loop runs instead of third.I think this "unset" is the cause of the error:
<var name="output.property" unset="true"/>
But can someone please tell me how to resolve this.My test java class is
very simple,it takes a argument and returns the uppercase of that...so when
so argument is specified,it returns nothing.
Thanks
