Re: Having TemplateException or NumberFormatException

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
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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