Created
November 20, 2015 00:59
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Event Filtering Idea
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| package filter; | |
| import java.util.Collection; | |
| import filter.CauseFilters.All; | |
| import filter.CauseFilters.First; | |
| import filter.DataFilters.HasDouble; | |
| import filter.DataFilters.HasInt; | |
| import filter.SubtypeFilters.Exclude; | |
| public class Example { | |
| //The Current methods | |
| @Listener | |
| public void onSubEvent(SubEvent event) { | |
| // Fairly typical pattern | |
| Optional<Player> player = event.getCause().first(Player.class); | |
| if(player.isPresent()) { | |
| //do something | |
| } | |
| } | |
| //========================================================================== | |
| //The proposed methods | |
| @Listener | |
| public void onSubEvent2(SubEvent event, @First Player player) { | |
| //will only be called if there is a player | |
| } | |
| @Listener | |
| public void onSubEvent2(SubEvent event, @First(name=NamedCause.NOTIFIER) Player player) { | |
| //will only be called if there is a player notifier present | |
| } | |
| @Listener | |
| public void onSubEvent3(SubEvent event, @First @HasDouble(key="health", value=5.0) Player player) { | |
| //will only be called if there is a player and they have 5 health | |
| // (at least thats the idea, still working on how to make data based filtering sane) | |
| } | |
| @Listener | |
| public void onSubEvent3(SubEvent event, @First @HasString(key="displayName", value="gabizou") Player player) { | |
| //will only be called if its gabizou | |
| } | |
| @Listener | |
| public void onSubEvent3(SubEvent event, @First @Supports(HealthData.class) Entity entity) { | |
| //will only be called if there is an entity and it has health | |
| // (sure you could just use '@First Living entity' but its an example damn it) | |
| } | |
| @Listener | |
| public void onSubEvent3(SubEvent event, @First @Has(ChargedData.class) Creeper entity) { | |
| //will only be called if there is a creeper and its charged | |
| // (this will be a bit of special handling to check the boolean state of the data as well as its existance) | |
| } | |
| @Listener | |
| public void onSubEvent2(SubEvent event, @All Player[] players) { | |
| //do something with all players | |
| //this will not be called if there are no players | |
| } | |
| @Listener | |
| public void onSubEvent2(SubEvent event, @All(allowEmpty=true) Collection<Player> players) { | |
| //do something with all players | |
| //this will be called regardless of if there are any players | |
| } | |
| @Listener | |
| public void onSubSub2And3(@Exclude(SubSubEvent1.class) SubEvent event) { | |
| // runs for SubSubEvent2 and SubSubEvent3 but not SubSubEvent1 | |
| } | |
| @Listener | |
| public void onSubSub2And3(@Include({SubSubEvent1.class, SubSubEvent2.class}) SubEvent event) { | |
| // runs for SubSubEvent1 and SubSubEvent2 but not SubSubEvent3 | |
| } | |
| @Listener | |
| public void onCancelled(@IsCancelled SubEvent event) { | |
| // will only run if the event has been cancelled by a previous listener | |
| } | |
| static interface Event { } | |
| static interface SubEvent extends Event { } | |
| static interface SubSubEvent1 extends SubEvent { } | |
| static interface SubSubEvent2 extends SubEvent { } | |
| static interface SubSubEvent3 extends SubEvent { } | |
| } |
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