[GROOVY-3632] Cannot overload/override setter with mutliple methods

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.6.3
• Assignee: Jochen Theodorou
• Reporter: Aaron Zeckoski
• Created: 22/Jul/09 07:35
• Updated: 22/Jul/09 13:41
• Resolved: 22/Jul/09 13:40

Description

It does not seem possible to overload a setter with multiple methods.
Groovy seems to randomly decide to fail with cast exceptions
rather than actually calling the correct setter. Here is the code:
public class Person {
// id is added by grails
String name
String email
Date birthdate
int age = 0
PersonSex sex = PersonSex.unknown
boolean active = true

void setBirthdate(String date)

{ // try to convert from string def df = new SimpleDateFormat("yyyy/MM/dd") birthdate = df.parse(date); }

void setBirthdate(Number date)

{ birthdate = new Date(date) }

}

I have a few tests to verify that I can create a user with a Date, String, or Long

With the code above it is not possible to set the bithdate to a Date
anymore as I always get a cast exception.
If I change "Number" to "Long" or "long" then the String test passes
but the number test fails. If I leave it as shown above then the
String test fails with this exception:
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot
cast object '1975/10/29' with class 'java.lang.String' to class
'java.lang.Number'
at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToNumber(DefaultTypeTransformation.java:132)
at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:261)
at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2392)
at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:3307)
at groovy.lang.MetaClassImpl.setProperties(MetaClassImpl.java:1506)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1483)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1404)
at org.codehaus.groovy.runtime.InvokerHelper.invokeConstructorOf(InvokerHelper.java:775)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeNewN(ScriptBytecodeAdapter.java:220)
at PersonTest.testPersonStringDate(PersonTests.groovy:32)

It seems like groovy is only able to work with a single setter method but it should be able to handle overloaded methods and properly call the one which matches the type.

Issue Links

• duplicates: GROOVY-2500 Assignment calls the wrong setter, depending on order of declaration