[jira] [Updated] (LANG-1190) TypeUtils.isAssignable throws NullPointerException when fromType has type variables and toType generic superclass specifies type variable

[Yuhau Lin (JIRA)]

     [ 
https://issues.apache.org/jira/browse/LANG-1190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Yuhau Lin updated LANG-1190:
----------------------------
    Description: 
import static org.apache.commons.lang3.reflect.TypeUtils.*; 
 
import java.lang.reflect.InvocationTargetException; 
import java.lang.reflect.Type; 
import java.util.ArrayList; 
 
public class Demonstration { 
 
    public static <U> Iterable<U> someMethod() { return null; } 
     
    public static class WorkingClass extends ArrayList { } 
    public static class FailingClass extends ArrayList<Object> { } 
     
     
    public static void main(String[] args) throws NoSuchMethodException, 
SecurityException, IllegalAccessException, IllegalArgumentException, 
InvocationTargetException { 
        Type fromType = 
Demonstration.class.getDeclaredMethod("someMethod").getGenericReturnType(); 
        Type workingToType = 
wildcardType().withLowerBounds(WorkingClass.class).build(); 
        Type failingToType = 
wildcardType().withLowerBounds(FailingClass.class).build(); 
         
        System.out.println(fromType); 
        System.out.println(workingToType); 
        System.out.println(failingToType); 
         
        System.out.println(isAssignable(fromType, workingToType)); 
        System.out.println(isAssignable(fromType, failingToType)); 
    } 
} 

  was:
import static org.apache.commons.lang3.reflect.TypeUtils.*;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Type;
import java.util.ArrayList;

public class Demonstration {

    public static <U> Iterable<U> someMethod() { return null; }
    
    public static class WorkingClass extends ArrayList { }
    public static class FailingClass extends ArrayList<Object> { }
    
    
    public static void main(String[] args) throws NoSuchMethodException, 
SecurityException, IllegalAccessException, IllegalArgumentException, 
InvocationTargetException {
        Type fromType = 
Demonstration.class.getDeclaredMethod("someMethod").getGenericReturnType();
        Type workingToType = 
wildcardType().withLowerBounds(WorkingClass.class).build();
        Type failingToType = 
wildcardType().withLowerBounds(FailingClass.class).build();
        
        System.out.println(fromType);
        System.out.println(workingToType);
        System.out.println(failingToType);
        
        System.out.println(isAssignable(fromType, workingToType));
        System.out.println(isAssignable(fromType, failingToType));
    }
}


> TypeUtils.isAssignable throws NullPointerException when fromType has type 
> variables and toType generic superclass specifies type variable
> -----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LANG-1190
>                 URL: https://issues.apache.org/jira/browse/LANG-1190
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.reflect.*
>    Affects Versions: 3.4
>            Reporter: Yuhau Lin
>
> import static org.apache.commons.lang3.reflect.TypeUtils.*; 
>  
> import java.lang.reflect.InvocationTargetException; 
> import java.lang.reflect.Type; 
> import java.util.ArrayList; 
>  
> public class Demonstration { 
>  
>     public static <U> Iterable<U> someMethod() { return null; } 
>      
>     public static class WorkingClass extends ArrayList { } 
>     public static class FailingClass extends ArrayList<Object> { } 
>      
>      
>     public static void main(String[] args) throws NoSuchMethodException, 
> SecurityException, IllegalAccessException, IllegalArgumentException, 
> InvocationTargetException { 
>         Type fromType = 
> Demonstration.class.getDeclaredMethod("someMethod").getGenericReturnType(); 
>         Type workingToType = 
> wildcardType().withLowerBounds(WorkingClass.class).build(); 
>         Type failingToType = 
> wildcardType().withLowerBounds(FailingClass.class).build(); 
>          
>         System.out.println(fromType); 
>         System.out.println(workingToType); 
>         System.out.println(failingToType); 
>          
>         System.out.println(isAssignable(fromType, workingToType)); 
>         System.out.println(isAssignable(fromType, failingToType)); 
>     } 
> } 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)