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