[GROOVY-1222] Object[] as List causes ClassCastException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-JSR-5
• Fix Version/s: 1.0
• Environment: Ubuntu 5.10 Breezy Badger; Java SE 5 -- JDK 1.5.0_06-b05; Groovy CVS Head 2006-01-23 11:30
• Assignee: Paul King
• Reporter: Dr. Russel Winder
• Created: 23/Jan/06 07:00
• Updated: 09/Dec/06 02:22
• Resolved: 08/Dec/06 18:29

Description

The script:

#! /usr/bin/env groovy

def x = ( new File ( "." ) ).list ( )
assert x instanceof String[]

def y = x as List
assert y instanceof List

when executed, results in:

Caught: java.lang.ClassCastException: [Ljava.lang.String;
at testfile.run(testfile.groovy:6)
at testfile.main(testfile.groovy)

Clearly Groovy does not have direct support for coercion of Object[] to List using this syntax.

replacing

def y = x as List

with

def y = x.toList ( )

makes the script work so the functionality is there. The issue is one of consistency of use of the "as List" type syntax.