@Override
public boolean supports(TherianContext context, Add<?, ? extends Collection<?>> add) {
// cannot add to immutable types
if (context.eval(ImmutableCheck.of(add.getTargetPosition())).booleanValue()) {
return false;
}
if (!TypeUtils.isAssignable(add.getTargetPosition().getType(), Collection.class)) {
return false;
}
final Type targetElementType =
TypeUtils.unrollVariables(
TypeUtils.getTypeArguments(add.getTargetPosition().getType(), Collection.class),
Collection.class.getTypeParameters()[0]);
if (targetElementType == null) {
// raw collection
return true;
}
return TypeUtils.isAssignable(add.getSourcePosition().getType(), targetElementType);
}
public boolean supports(Copy<?, ?> operation) {
return operation.getTargetPosition() instanceof Position.Writable
&& TherianContext.getRequiredInstance()
.eval(ImmutableCheck.of(operation.getTargetPosition()))
.booleanValue();
}
public void perform(Copy<?, ?> operation) {
final Convert<?, ?> convert =
Convert.to(
(Position.Writable<?>) operation.getTargetPosition(), operation.getSourcePosition());
TherianContext.getRequiredInstance().forwardTo(convert);
}