[SPARK-45501] Use pattern matching for type checking and conversion

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Spark Core, SQL
• Labels: pull-request-available
• Assignee: Yang Jie
• Reporter: Yang Jie
• Created: 11/Oct/23 07:08
• Updated: 12/Oct/23 15:53
• Resolved: 12/Oct/23 15:53

Description

Refer to JEP 394

Example:

if (obj instanceof String) {
    String str = (String) obj;
    System.out.println(str);
} 

Can be replaced with

 

if (obj instanceof String str) {
    System.out.println(str);
} 

The new code look more compact

Issue Links

• links to: GitHub Pull Request #43327