[TAMAYA-212] Make predefined comparators singletons.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3-incubating
• Component/s: Core, Modules
• Assignee: Anatole Tresch
• Reporter: Anatole Tresch
• Created: 21/Dec/16 15:48
• Updated: 18/Sep/17 19:34
• Resolved: 22/Dec/16 21:20

Description

Core as well as the spi-support module provide public Comparator classes for property sources, filters and converters. They should be implemented as singleton with a getInstance() method each to prevent other usages.