Feature that allows you to use SpEL in @NamePattern of entity

[rushan-zagidullin]

One more convinient way to specify NamePattern. Using SpEL allows you to invoke bean methods like a charm.

The expression language supports the following functionality:

Literal expressions
Boolean and relational operators
Regular expressions
Class expressions
Accessing properties, arrays, lists, maps
Method invocation
Relational operators
Assignment
Calling constructors
Bean references
Array construction
Inline lists
Inline maps
Ternary operator
Variables
User defined functions
Collection projection
Collection selection
Templated expressions

More information: https://docs.spring.io/spring/docs/4.3.14.RELEASE/spring-framework-reference/html/expressions.html

[jreznot]

Relates to #306

[jreznot]

What are the implications of this expression engine for application performance?

[jreznot]

It would be better if we introduce separate annotation attribute instead of the String format

[rushan-zagidullin]

About performance:
"In an example micro benchmark run of 50000 iterations, it was taking 75ms to evaluate using only the interpreter"
https://docs.spring.io/spring/docs/4.2.x/spring-framework-reference/html/expressions.html#expressions-spel-compilation

[rushan-zagidullin]

I also think that a separate attribute will be better. But there is a question about what to do with the list of minimal view attributes

[knstvk]

What about SpEL compilation? Could we have it depending on some app property?