@Override public boolean canConvert(TypeDescriptor sourceTypeDescriptor, TypeDescriptor targetTypeDescriptor) { if (conversionService.canConvert(sourceTypeDescriptor, targetTypeDescriptor)) { return true; } // TODO: what does this mean? This method is not used in SpEL so probably ignorable? Class<?> sourceType = sourceTypeDescriptor.getObjectType(); Class<?> targetType = targetTypeDescriptor.getObjectType(); return canConvert(sourceType, targetType); }
@Ignore @Test public void repro() throws Exception { AlwaysTrueReleaseStrategy target = new AlwaysTrueReleaseStrategy(); BeanFactoryTypeConverter converter = new BeanFactoryTypeConverter(); StandardEvaluationContext context = new StandardEvaluationContext(); context.setTypeConverter(converter); List<Foo> arguments = new ArrayList<>(); // !!!! With the below line commented you'll get NPE. Uncomment and everything is OK! //arguments.add(new Foo()); List<TypeDescriptor> paramDescriptors = new ArrayList<>(); Method method = AlwaysTrueReleaseStrategy.class.getMethod("checkCompleteness", List.class); paramDescriptors.add(new TypeDescriptor(new MethodParameter(method, 0))); List<TypeDescriptor> argumentTypes = new ArrayList<>(); argumentTypes.add(TypeDescriptor.forObject(arguments)); ReflectiveMethodResolver resolver = new ReflectiveMethodResolver(); MethodExecutor executor = resolver.resolve(context, target, "checkCompleteness", argumentTypes); Object result = executor.execute(context, target, arguments); System.out.println("Result: " + result); }