[FLINK-6248] Make the optional() available to all offered patterns.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Component/s: Library / CEP
• Assignee: Kostas Kloudas
• Reporter: Kostas Kloudas
• Created: 03/Apr/17 14:48
• Updated: 26/Apr/17 12:08
• Resolved: 26/Apr/17 12:08

Description

Currently the optional() quantifier is available as a separate pattern. This issue proposes to make it available as a flag to all patterns.

This implies that:
1) a singleton pattern with optional=true will become the current OPTIONAL,
2) a oneToMany will become zeroToMany,
3) the zeroToMany will not exist as a direct option in the Pattern class, and
4) the times() will require some changes in the NFACompiler.