[GROOVY-6584] Cannot use memoize() to cache metaclass method call

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.1
• Fix Version/s: 2.4.8
• Component/s: groovy-runtime
• Assignee: John Wagenleitner
• Reporter: Sargis Harutyunyan
• Created: 17/Feb/14 06:21
• Updated: 01/Feb/17 23:18
• Resolved: 07/Oct/16 04:03

Description

Hi I want to extend my list with new method and cache the result because actually it will query db but I am getting 'java.lang.UnsupportedOperationException', I reproduced it for simple case also using groovy console

def lst = []
lst.metaClass.getTotalCount = {
    println ">>>>>>>>>> 12 <<<<<<<<<<"
    12 // can be some select count(*) from xxx
}.memoize()

println lst.getTotalCount()
println lst.getTotalCount()

I am getting

java.lang.UnsupportedOperationException: org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod$AnonymousMetaMethod
	at ConsoleScript10.run(ConsoleScript10:2)

Issue Links

• links to: GitHub Pull Request #434