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Switch case problem with JvmTypeReference [message #1798927]

Tue, 27 November 2018 14:22

Karsten Wilken

Messages: 59
Registered: August 2016

Member

With the simple parser rule:

Column:
	'column' name=ValidID ':' columnType=JvmTypeReference ';'
;

Depending on the type I want to generate different strings. Sounds easy, but it doesn't seem to be that obvious.

Within the inferrer I use a switch statement:

switch column.columnType {
	Long: {
		list.add("xyz")
	}
	Integer: {
		list.add("abc")
	}
	default: {
		list.add("z")
	}
}

This leads to a obvious "Cannot cast from JvmTypeReference to Long".

How can I convert the jvmreference or the jvmtype of the reference to the corresponding java type?

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Re: Switch case problem with JvmTypeReference [message #1798928 is a reply to message #1798927]

Tue, 27 November 2018 14:30

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

Resolve the 'type' reference of the JvmTypeReference. That returns a JvmType. Use the qualifiedName of it to decide that it's a java.lang.Long. A direct usage of the Long type is not possible here, the JVM types are just a representation of the type system.

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