groovy

Discovery mechanism for customizing metaclasses with a script using ExpandoMetaClass

Details

  • Type: Sub-task Sub-task
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: None
  • Fix Version/s: 3.0
  • Component/s: None
  • Labels:
    None
  • Number of attachments :
    0

Description

Currently, it is possible to define custom MetaClasses at load time by following the convention:

groovy.runtime.metaclass.java.lang.StringMetaClass

Creating this StringMetaClass in this specific place will use this metaclass in lieu of the default metaclass.

By adding ExpandoMetaClass back in Groovy, we should provide a mechanism for customizing metaclasses.
For instance, we could create an expandoMetaClassScript.groovy in the package groovy.runtim.metaclass.
And in this script, we would use ExpandoMetaClasses to customize classes behaviour further.

Issue Links

relates to

Improvement - An improvement or enhancement to an existing feature or task. GROOVY-3944 Add a META-INF/services mechanism (similar to global ast transformations) that allows custom ExpandoMetaClass code to be run when a class is loaded

  • Major - Major loss of function.
  • Open - The issue is open and ready for the assignee to start work on it.

Activity

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Alex Tkachman added a comment -

This should go to 2.0 or at least 1.2

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Alex Tkachman added a comment - This should go to 2.0 or at least 1.2

People

  • Assignee:
    Unassigned
    Reporter:
    Guillaume Laforge
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Dates

  • Created:
    Updated: