[jira] [Created] (GROOVY-8416) Map-based constructor generated by @Immutable works only with HashMap

["Andreas Mayer (JIRA)" <ji...@apache.org>]

Andreas Mayer created GROOVY-8416:
-------------------------------------

             Summary: Map-based constructor generated by @Immutable works only with HashMap
                 Key: GROOVY-8416
                 URL: https://issues.apache.org/jira/browse/GROOVY-8416
             Project: Groovy
          Issue Type: Bug
    Affects Versions: 2.4.13
            Reporter: Andreas Mayer


If you call the map-based constructor of an {{@Immutable}} class with a non-{{HashMap}}, it will try to set the properties via setters, which causes a {{ReadOnlyPropertyException}}. Somehow it works with {{HashMap}} or subclasses like {{LinkedHashMap}}. Why?

{code}
import groovy.transform.Immutable

@Immutable
class Point {
	int x
	int y
}

def coordinates = [x: 1, y: 2]
assert coordinates instanceof LinkedHashMap

def p1 = new Point(coordinates)
assert p1.x == 1

def p2 = new Point(new HashMap(coordinates))
assert p2.x == 1

try {
	new Point(new TreeMap(coordinates))
} catch (e) {
	assert e instanceof ReadOnlyPropertyException
}

try {
	new Point(coordinates.asImmutable())
} catch (e) {
	assert e instanceof ReadOnlyPropertyException
}
{code}



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