Filters

Filters

You can create filters, that can cancel the command execution:

@Component(position = FilterPosition.BEFORE_ROUTING)
public class ExampleFilter implements Filter {

    @Override
    public void apply(@NotNull CommandContext context) {
        if (condition) {
            context.setCancelled(true);
            context.setErrorMessage(new MessageBuilder().append("Error Message").build());
            return;
        }
    }
}

The following positions are available:

• BEFORE_ROUTING - Filter will be executed before command routing. The command will not be present in the CommandContext

• BEFORE_ADAPTING - Filter will be executed before type adapting. The command will be present in the CommandContext but not the type adapted input.

• BEFORE_EXECUTION - Filter will be executed just before the command execution.