[GROOVY-9653] SC: ClassCastException on delegate object property set

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.5, 2.5.13
• Fix Version/s: 4.0.0-alpha-1, 3.0.6, 2.5.15
• Component/s: Static compilation
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 23/Jul/20 23:22
• Updated: 01/Jan/21 19:16
• Resolved: 01/Aug/20 23:37

Description

This started to fail in Groovy 2.5.13:

import com.fasterxml.jackson.annotation.JsonInclude
@Grab('com.fasterxml.jackson.core:jackson-databind:2.9.9')
import com.fasterxml.jackson.databind.ObjectMapper
@Grab('org.springframework:spring-web:4.3.14.RELEASE')
import org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean

@groovy.transform.CompileStatic
final class MyObjectMapper extends ObjectMapper
{
    MyObjectMapper()
    {
        super(mimicSpring())
    }

    private static ObjectMapper mimicSpring()
    {
        new Jackson2ObjectMapperFactoryBean().with {
            serializationInclusion = JsonInclude.Include.NON_NULL // ClassCastException: org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean cannot be cast to com.fasterxml.jackson.databind.ObjectMapper
            defaultViewInclusion = true // include w/o view tag
            failOnUnknownProperties = false
            autoDetectGettersSetters = true
            autoDetectFields = false
            afterPropertiesSet()
            return object
        }
    }

    private static final long serialVersionUID = 2643043846851474223L
}

println new MyObjectMapper()

Works fine with default (dynamic) compilation.

In this case, the delegate (Jackson2ObjectMapperFactoryBean) and owner (MyObjectMapper) both supply a setter "setSerializationInclusion" and do not have a field of the same name. StaticCompilationVisitor/StaticTypeCheckingVisitor existsProperty fail to record the receiver type when visiting the setter.