I am also trying to learn Groovy and I tried this thing and for me both the things worked -
1) setting this.metaClass = null in the MyGroovyClassImpl constructor in MyGroovyClassImpl.groovy
2) setting MyGroovyClassImpl.metaClass.getNext in a static block so that it happens only once.
Can you please take out a few moments and explain the effect "this.metaClass = null" internally has? Does setting it null make the instance use the global metaclass that has been affected by setting "MyGroovyClassImpl.metaClass.getNext"?
Regards,
Roshan
On Fri, Aug 22, 2008 at 9:59 PM, Setya
<jsetya@...> wrote:
Hi blackdrag,
Thanks for quick response.
I've tried your suggestions, but none of them works.
Regarding ExpandoMetaClass.enableGlobally(), If I put it in
MyGroovyClassImpl.groovy than the GroovyClassLoader won't parse the file as
instance of MyJavaInterface. If I add it when evaluating the script, it
doesn't take effect.
But If I put those scripts in 1 file it works as expected as follows:
class MyGroovyClassImpl
{
MyGroovyClassImpl()
{
MyGroovyClassImpl.metaClass.getNext = {->println 'This is next
command.';};
}
}
ExpandoMetaClass.enableGlobally();
def context = new MyGroovyClassImpl();
context.next;
Regards,
Setya
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