[groovy-user] dynamic loading script file - no such property: error

[prabuinet]

Hi!

I'm loading a groovy script file dynamically with GroovyClassLoader
In the script file I have this code

def var = false;

void run() {
if(var == false) {
...
}
}

though I have declared the variable "var" in the script file I'm getting the
error when call the function run().

Caught: groovy.lang.MissingPropertyException: No such property: var for
class: foo

Thanks.
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[Merlyn Albery-Speyer]

I get that error if I run this script:

def var = false
boolean run() {
return (var == false)
}
assert run() == true

What works for me is:

def var = false
def run = {
return (var == false)
}
assert run() == true

Does that help at all?

On Wed, Dec 9, 2009 at 10:51 PM, prabuinet <prab...@gmail.com> wrote:
>
> Hi!
>
> I'm loading a groovy script file dynamically with GroovyClassLoader
> In the script file I have this code
>
> def var = false;
>
> void run() {
>   if(var == false) {
>       ...
>   }
> }
>
>
> though I have declared the variable "var" in the script file I'm getting the
> error when call the function run().
>
> Caught: groovy.lang.MissingPropertyException: No such property: var for
> class: foo

---------------------------------------------------------------------

[prabuinet]

Now I'm getting a different error:

Caught: groovy.lang.MissingMethodException: No signature of method:
foo.run() is applicable for argument types: () values: {}

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[Roshan Dawrani]

Please refer http://groovy.codehaus.org/Scoping+and+the+Semantics+of+%22def%22 to find out why a variable declared using "def" is not visible in other methods.

[prabuinet]

def var = false;

void run() {
if(var == false) {
...
}
}

Ooh! "var' is not in other module.. it is in the same script file.
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[Andreas Jöcker]

Hi all,

I have the following config file (build.properties) :

target = foo
source = bar-buh

the following code works intentionally:

def props = new Properties()
props.load(new FileInputStream(new File('build.properties')))
def config = new ConfigSlurper().parse(props)
println config.source

the following code fails:

def c = new ConfigSlurper().parse(new File('build.properties').toURL())
println c.target

Exception in thread "main" groovy.lang.MissingMethodException: No
signature of method: groovy.util.ConfigObject.minus() is applicable for
argument types: (groovy.util.ConfigObject) values: {[:]}
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:172)
at script1260439847206.run(script1260439847206.groovy:2)

Shouldn't these two ways of loading a configuration be equal ?

Thx
Andreas

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Andreas Jöcker
GiS - Gesellschaft für integrierte Systemplanung mbH
Junkersstr. 2
69469 Weinheim

E-Mail a.jo...@gis-systemhaus.de
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Fax +49 6201 503-66

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[Andreas Jöcker]

:(
sorry - I guess I respond an existing thread with a new question again...

sorry for messing up someones view

[Jochen Theodorou]

prabuinet schrieb:

> def var = false;
>
> void run() {
> if(var == false) {
> ...
> }
> }
>
>
> Ooh! "var' is not in other module.. it is in the same script file.

the same script file, but not the same method. var is a local variable
to the implicit run method, but then you even overwrite the run method.
So your code cannot work even if you removed the "def" in front of "def
var" and thus making it a value stored in the binding rather than a
local variable that is invisible in other methods.

bye blackdrag

--
Jochen "blackdrag" Theodorou
The Groovy Project Tech Lead (http://groovy.codehaus.org)
http://blackdragsview.blogspot.com/