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feat: static listeners, parameterzied IEventDispatcher

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zaaarf 2024-09-01 12:54:05 +02:00
parent 3238cf5fe8
commit 22a60c7ed3
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1 changed files with 42 additions and 26 deletions
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48
src/main/java/ftbsc/geb/processor/GEBProcessor.java
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@ -56,9 +56,9 @@ public class GEBProcessor extends AbstractProcessor {
private TypeMirror cancelableEventInterface;
/**
* A {@link TypeMirror} representing the {@link IEventDispatcher} interface.
* A {@link TypeElement} representing the {@link IEventDispatcher} interface.
*/
private TypeMirror dispatcherInterface;
private TypeElement dispatcherInterface;
/**
* Initializes the processor with the given environment.
@ -73,7 +73,7 @@ public class GEBProcessor extends AbstractProcessor {
this.eventInterface = env.getElementUtils()
.getTypeElement("ftbsc.geb.api.IEvent").asType();
this.dispatcherInterface = env.getElementUtils()
.getTypeElement("ftbsc.geb.api.IEventDispatcher").asType();
.getTypeElement("ftbsc.geb.api.IEventDispatcher");
this.cancelableEventInterface = env.getElementUtils()
.getTypeElement("ftbsc.geb.api.IEventCancelable").asType();
}
@ -123,14 +123,16 @@ public class GEBProcessor extends AbstractProcessor {
private void processListener(Element target) {
ExecutableElement listener = (ExecutableElement) target; //this cast will never fail
//ensure the parent is instance of IListener
// if the method is not static, ensure the parent is an instance of IListener
if(!listener.getModifiers().contains(Modifier.STATIC)) {
TypeMirror parentType = listener.getEnclosingElement().asType();
if(!this.processingEnv.getTypeUtils().isAssignable(parentType, this.listenerInterface))
throw new MissingInterfaceException(
listener.getEnclosingElement().getSimpleName().toString(),
listener.getSimpleName().toString());
}
//ensure the listener method has only one parameter
// ensure the listener method has only one parameter
List<? extends VariableElement> params = listener.getParameters();
if(listener.getParameters().size() != 1)
throw new BadListenerArgumentsException.Count(
@ -138,7 +140,7 @@ public class GEBProcessor extends AbstractProcessor {
listener.getSimpleName().toString(),
params.size());
//ensure said parameter implements IEvent
// ensure said parameter implements IEvent
TypeMirror event = params.get(0).asType();
if(!this.processingEnv.getTypeUtils().isAssignable(event, this.eventInterface))
throw new BadListenerArgumentsException.Type(
@ -146,7 +148,7 @@ public class GEBProcessor extends AbstractProcessor {
listener.getSimpleName().toString(),
params.get(0).getSimpleName().toString());
//warn about return type
// warn about return type
if(!listener.getReturnType().getKind().equals(TypeKind.VOID))
this.processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING, String.format(
"The method %s::%s has a return type: please note that it will be ignored.",
@ -164,8 +166,9 @@ public class GEBProcessor extends AbstractProcessor {
this.listenerMap.forEach((event, listeners) -> {
TypeElement eventClass = (TypeElement) this.processingEnv.getTypeUtils().asElement(event);
boolean cancelable = this.processingEnv.getTypeUtils().isAssignable(event, this.cancelableEventInterface);
ClassName setName = ClassName.get("java.util", "Set");
ParameterSpec eventParam = ParameterSpec.builder(TypeName.get(this.eventInterface), "event").build();
ParameterSpec eventParam = ParameterSpec.builder(TypeName.get(event), "event").build();
ParameterSpec listenersParam = ParameterSpec.builder(
ParameterizedTypeName.get(
ClassName.get("java.util", "Map"),
@ -174,7 +177,7 @@ public class GEBProcessor extends AbstractProcessor {
WildcardTypeName.subtypeOf(TypeName.get(this.listenerInterface))
),
ParameterizedTypeName.get(
ClassName.get("java.util", "Set"),
setName,
ClassName.get(this.listenerInterface)
)
),
@ -203,7 +206,8 @@ public class GEBProcessor extends AbstractProcessor {
done.put(listener.parent, i);
String varName = String.format("listener%d", i);
callListenersBuilder.addStatement(
"java.util.Set<$T> $L = $N.get($T.class)",
"$T<$T> $L = $N.get($T.class)", // Set is already imported per the parameters
setName,
this.listenerInterface,
varName,
listenersParam,
@ -213,18 +217,28 @@ public class GEBProcessor extends AbstractProcessor {
}
for(ListenerContainer listener : ordered) {
if(listener.method.getModifiers().contains(Modifier.STATIC)) {
// if static call it directly
callListenersBuilder.addStatement(
"$T.$L($N);",
listener.parent,
listener.method.getSimpleName().toString(),
eventParam
);
} else {
// else iterate over its listeners
String varName = String.format("listener%d", done.get(listener.parent));
callListenersBuilder
.addStatement("if($L != null) { for($T l : $L) {", varName, this.listenerInterface, varName)
.addStatement(
"if(l != null) (($T) l).$L(($T) $N); } }",
"if(l != null) (($T) l).$L($N); } }",
listener.parent,
listener.method.getSimpleName().toString(),
event,
eventParam
);
}
if(cancelable) callListenersBuilder
.addStatement("if((($T) $N).isCanceled()) return false", this.cancelableEventInterface, eventParam);
.addStatement("if($N.isCanceled()) return false", eventParam);
}
callListenersBuilder.addStatement("return true");
@ -232,15 +246,17 @@ public class GEBProcessor extends AbstractProcessor {
MethodSpec eventType = MethodSpec.methodBuilder("eventType")
.addModifiers(Modifier.PUBLIC)
.addAnnotation(Override.class)
.returns(Class.class)
.returns(ParameterizedTypeName.get(ClassName.get(Class.class), TypeName.get(event)))
.addStatement("return $T.class", event)
.build();
String clazzName = String.format("%sDispatcher", eventClass.getSimpleName());
TypeSpec clazz = TypeSpec.classBuilder(clazzName)
.addModifiers(Modifier.PUBLIC)
.addSuperinterface(this.dispatcherInterface)
.addMethod(callListenersBuilder.build())
.addSuperinterface(ParameterizedTypeName.get(
ClassName.get(this.dispatcherInterface),
TypeName.get(event)
)).addMethod(callListenersBuilder.build())
.addMethod(eventType)
.build();