/**
* Invokes all {@link ResourceProcessor} instances registered for the type of the given value and
* reference type.
*
* @param value must not be {@literal null}.
* @param referenceType must not be {@literal null}.
* @return
*/
@SuppressWarnings("unchecked")
public <T extends ResourceSupport> T invokeProcessorsFor(T value, ResolvableType referenceType) {
Assert.notNull(value, "Value must not be null!");
Assert.notNull(referenceType, "Reference type must not be null!");
// For Resources implementations, process elements first
if (ResourceProcessorHandlerMethodReturnValueHandler.RESOURCES_TYPE.isAssignableFrom(
referenceType)) {
Resources<?> resources = (Resources<?>) value;
ResolvableType elementTargetType =
ResolvableType.forClass(Resources.class, referenceType.getRawClass()).getGeneric(0);
List<Object> result = new ArrayList<Object>(resources.getContent().size());
for (Object element : resources) {
ResolvableType elementType = ResolvableType.forClass(element.getClass());
if (!getRawType(elementTargetType).equals(elementType.getRawClass())) {
elementTargetType = elementType;
}
result.add(invokeProcessorsFor(element, elementTargetType));
}
ReflectionUtils.setField(
ResourceProcessorHandlerMethodReturnValueHandler.CONTENT_FIELD, resources, result);
}
return (T) invokeProcessorsFor((Object) value, referenceType);
}
/*
* (non-Javadoc)
* @see org.springframework.data.rest.webmvc.ResourceProcessorHandlerMethodReturnValueHandler.DefaultProcessorWrapper#supports(org.springframework.core.ResolvableType, java.lang.Object)
*/
@Override
public boolean supports(ResolvableType type, Object value) {
if (!ResourceProcessorHandlerMethodReturnValueHandler.RESOURCES_TYPE.isAssignableFrom(type)) {
return false;
}
return super.supports(type, value) && isValueTypeMatch((Resources<?>) value, getTargetType());
}
