Re: Having TemplateException or NumberFormatException

Hi Daniel,

On 11 Sep 2014, at 00:16, Daniel Dekany wrote:

> XML stores string values, not numbers or dates or such (OK, not
> exactly since Schema, but still). So you have to tell FreeMarker to
> convert that string to a number, if you want to treat it as a number,
> or else it's just a string, no mater how it looks.
> 
>  <#local level = doc["XPath..../@level"]?number>.
> 
> However, I guess "number(XPath..../@level)" should work too, and the

How will it work?

>> <#local level = doc["number(XPath..../@level)"]>

the result of number() is used as index

I think ?number is the correct answer.

-- Denis.

> resulting arithmetic exception is odd. What number is that, that
> BigDecimal can't parse? A NaN maybe? (BTW FreeMarker 2.3.21 RC1 will
> show the problematic number in the error message.)
> 
> -- 
> Thanks,
> Daniel Dekany
> 
> 
> Thursday, September 11, 2014, 12:23:29 AM, ven12344 wrote:
> 
>> Hi, All
>> 
>> Need help with Freemarker local variable comparison with a constant or local
>> constant variable, tried both but did not work
>> 
>> *FIRST APPROACH*
>> 
>> I have code like this
>> 
>> <#local level = doc["XPath..../@level"]>
>> 
>> "doc" here is the passed in XML document to freemarker and I am getting the
>> level (this is attribute in XML which will give the level of the element
>> like 1,2,3...) info using XPath and comparing to a constant local variable
>> like this 
>> 
>> <#if (symbolLevel > levelTest)><#t>
>> 
>> where
>> 
>> <#local levelTest = 4>
>> 
>> For this bit of code I got this exception
>> 
>> freemarker.template.TemplateException: The only legal comparisons are
>> between two numbers, two strings, or two dates.
>> Left  hand operand is a freemarker.ext.dom.AttributeNodeModel
>> Right hand operand is a freemarker.template.SimpleNumber
>> 
>> 
>> *SECOND APPROACH*
>> 
>> I have code like this
>> 
>> <#local level = doc["number(XPath..../@level)"]>
>> 
>> and I am getting the level info using XPath's *number function* and
>> comparing to a constant local variable like this 
>> 
>> <#if (symbolLevel > 4)><#t>
>> 
>> For this bit of code I got the same exception as the third approach.
>> 
>> 
>> *THIRD APPROACH*
>> 
>> I have code like this
>> 
>> <#local level = doc["number(XPath..../@level)"]>
>> 
>> and I am getting the level info using XPath's *number function* and
>> comparing to a constant local variable like this 
>> 
>> <#if (symbolLevel > levelTest)><#t>
>> 
>> For this bit of code I got this exception
>> 
>> java.lang.NumberFormatException
>>        at java.math.BigDecimal.<init>(BigDecimal.java:459)
>>        at java.math.BigDecimal.<init>(BigDecimal.java:728)
>>        at
>> freemarker.core.ArithmeticEngine.toBigDecimal(ArithmeticEngine.java:529)
>>        at
>> freemarker.core.ArithmeticEngine.access$000(ArithmeticEngine.java:68)
>>        at
>> freemarker.core.ArithmeticEngine$BigDecimalEngine.compareNumbers(ArithmeticEngine.java:142)
>>        at
>> freemarker.core.ComparisonExpression.isTrue(ComparisonExpression.java:131)
>>        at
>> freemarker.core.ParentheticalExpression.isTrue(ParentheticalExpression.java:66)
>>        at freemarker.core.IfBlock.accept(IfBlock.java:80)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.MixedContent.accept(MixedContent.java:92)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at
>> freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179)
>>        at freemarker.core.Environment.visit(Environment.java:415)
>>        at
>> freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.MixedContent.accept(MixedContent.java:92)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.Environment.visit(Environment.java:297)
>>        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:130)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.Macro$Context.runMacro(Macro.java:163)
>>        at freemarker.core.Environment.visit(Environment.java:601)
>>        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.MixedContent.accept(MixedContent.java:92)
>>        at freemarker.core.Environment.visit(Environment.java:208)
>>        at freemarker.core.Environment.process(Environment.java:188)
>>        at freemarker.template.Template.process(Template.java:237)


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