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Posted to users@groovy.apache.org by Schalk Cronjé <ys...@gmail.com> on 2015/05/01 16:48:54 UTC
respondsTo and constructors
I cannot figure out how to check for a constructor using respondsTo. If
I had the following
class ABC {
ABC(String s, File f) {}
}
How can I use respondsTo to see if the constructor exists?
--
Schalk W. Cronjé
Twitter / Ello / Toeter : @ysb33r
Re: respondsTo and constructors
Posted by Schalk Cronjé <ys...@gmail.com>.
Thank you Dinko.
On 06/05/2015 09:25, Dinko Srkoč wrote:
> How about this:
>
> static IDownload createDownloader(Logger logger) {
> Download.constructors.findResult { ctor ->
> ctor.parameterTypes == [Logger, String, String] as Class[] ?
> ctor.newInstance(logger, 'GradleTestPlugin','1.0') :
> ctor.newInstance('GradleTestPlugin','1.0')
> }
> }
>
> Cheers,
> Dinko
>
> On 5 May 2015 at 19:41, Schalk Cronjé <ys...@gmail.com> wrote:
>> I did this for the time being. It works, but I'm not happy about it.
>>
>> https://github.com/ysb33r/gradleTest/blob/master/src/main/groovy/org/ysb33r/gradle/gradletest/internal/Unpacker.groovy#L37
>>
>> Lines 37-43.
>>
>>
>> On 03/05/2015 15:56, Dinko Srkoč wrote:
>>> On 1 May 2015 at 16:48, Schalk Cronjé <ys...@gmail.com> wrote:
>>>> I cannot figure out how to check for a constructor using respondsTo. If I
>>>> had the following
>>>>
>>>> class ABC {
>>>> ABC(String s, File f) {}
>>>> }
>>>>
>>>> How can I use respondsTo to see if the constructor exists?
>>> It appears that you cannot. There's a
>>> `MetaClassImpl#retrieveConstructor(Class[])` that may help, or one can
>>> always fallback to Java reflection API.
>>>
>>> Cheers,
>>> Dinko
>>>
>>>> --
>>>> Schalk W. Cronjé
>>>> Twitter / Ello / Toeter : @ysb33r
>>
>>
>> --
>> Schalk W. Cronjé
>> Twitter / Ello / Toeter : @ysb33r
>>
--
Schalk W. Cronjé
Twitter / Ello / Toeter : @ysb33r
Re: respondsTo and constructors
Posted by Dinko Srkoč <di...@gmail.com>.
How about this:
static IDownload createDownloader(Logger logger) {
Download.constructors.findResult { ctor ->
ctor.parameterTypes == [Logger, String, String] as Class[] ?
ctor.newInstance(logger, 'GradleTestPlugin','1.0') :
ctor.newInstance('GradleTestPlugin','1.0')
}
}
Cheers,
Dinko
On 5 May 2015 at 19:41, Schalk Cronjé <ys...@gmail.com> wrote:
> I did this for the time being. It works, but I'm not happy about it.
>
> https://github.com/ysb33r/gradleTest/blob/master/src/main/groovy/org/ysb33r/gradle/gradletest/internal/Unpacker.groovy#L37
>
> Lines 37-43.
>
>
> On 03/05/2015 15:56, Dinko Srkoč wrote:
>>
>> On 1 May 2015 at 16:48, Schalk Cronjé <ys...@gmail.com> wrote:
>>>
>>> I cannot figure out how to check for a constructor using respondsTo. If I
>>> had the following
>>>
>>> class ABC {
>>> ABC(String s, File f) {}
>>> }
>>>
>>> How can I use respondsTo to see if the constructor exists?
>>
>> It appears that you cannot. There's a
>> `MetaClassImpl#retrieveConstructor(Class[])` that may help, or one can
>> always fallback to Java reflection API.
>>
>> Cheers,
>> Dinko
>>
>>> --
>>> Schalk W. Cronjé
>>> Twitter / Ello / Toeter : @ysb33r
>
>
>
> --
> Schalk W. Cronjé
> Twitter / Ello / Toeter : @ysb33r
>
Re: respondsTo and constructors
Posted by Schalk Cronjé <ys...@gmail.com>.
I did this for the time being. It works, but I'm not happy about it.
https://github.com/ysb33r/gradleTest/blob/master/src/main/groovy/org/ysb33r/gradle/gradletest/internal/Unpacker.groovy#L37
Lines 37-43.
On 03/05/2015 15:56, Dinko Srkoč wrote:
> On 1 May 2015 at 16:48, Schalk Cronjé <ys...@gmail.com> wrote:
>> I cannot figure out how to check for a constructor using respondsTo. If I
>> had the following
>>
>> class ABC {
>> ABC(String s, File f) {}
>> }
>>
>> How can I use respondsTo to see if the constructor exists?
> It appears that you cannot. There's a
> `MetaClassImpl#retrieveConstructor(Class[])` that may help, or one can
> always fallback to Java reflection API.
>
> Cheers,
> Dinko
>
>> --
>> Schalk W. Cronjé
>> Twitter / Ello / Toeter : @ysb33r
--
Schalk W. Cronjé
Twitter / Ello / Toeter : @ysb33r
Re: respondsTo and constructors
Posted by Dinko Srkoč <di...@gmail.com>.
On 1 May 2015 at 16:48, Schalk Cronjé <ys...@gmail.com> wrote:
> I cannot figure out how to check for a constructor using respondsTo. If I
> had the following
>
> class ABC {
> ABC(String s, File f) {}
> }
>
> How can I use respondsTo to see if the constructor exists?
It appears that you cannot. There's a
`MetaClassImpl#retrieveConstructor(Class[])` that may help, or one can
always fallback to Java reflection API.
Cheers,
Dinko
>
> --
> Schalk W. Cronjé
> Twitter / Ello / Toeter : @ysb33r