[JEXL-222] The ability to declare indexed property getter/setter in customised JexlArithmetic implementation

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0
• Fix Version/s: 3.1
• Assignee: Henri Biestro
• Reporter: Dmitri Blinov
• Created: 12/Mar/17 08:25
• Updated: 29/Jun/21 06:59
• Resolved: 14/Mar/17 14:09

Description

At the moment we have the ability to declare a specific getter/setter method in customized JexlArithmetic class that will be used by Jexl engine when engine tries to get access to a property of some object. This is great extension point of the Jexl but I have come to a situation where I need the same technics to be applied to indexed properties. For example I'm scripting org.w3c.dom.Element object by setting its attributes via its

Element.setAttribute(java.lang.String name, java.lang.String value) 

method. In Jexl I use standard indexed property access syntax like the following:

 node.attribute.id = "12345"; 

The problem lies with the last argument of the setAttribute method which is of String class. And for Jexl standard indexed property setter to work I should always remember that in script I need to cast specified property value to a string, which is error-prone and lacks, in my understanding, scripting easiness. I see the solution as to introduce custom indexed property setter in more generalized form, accepting Object type as a value so it could cast a value to String before calling Element.setAttribute