Mirror von
https://github.com/PaperMC/Velocity.git
synchronisiert 2024-11-16 21:10:30 +01:00
Add annotation processor for @Subscribe
Dieser Commit ist enthalten in:
Andrew Steinborn
Ursprung
e6e35d3754
Commit
ee2870aafb
@ -0,0 +1,8 @@
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package com.velocitypowered.annotationprocessor;
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class AnnotationProcessorConstants {
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static final String PLUGIN_ANNOTATION_CLASS = "com.velocitypowered.api.plugin.Plugin";
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static final String SUBSCRIBE_ANNOTATION_CLASS = "com.velocitypowered.api.event.Subscribe";
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static final String EVENTTASK_CLASS = "com.velocitypowered.api.event.EventTask";
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}
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@ -0,0 +1,167 @@
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/*
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* Copyright (C) 2018 Velocity Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.velocitypowered.annotationprocessor;
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import static com.velocitypowered.annotationprocessor.AnnotationProcessorConstants.EVENTTASK_CLASS;
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import static com.velocitypowered.annotationprocessor.AnnotationProcessorConstants.PLUGIN_ANNOTATION_CLASS;
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import static com.velocitypowered.annotationprocessor.AnnotationProcessorConstants.SUBSCRIBE_ANNOTATION_CLASS;
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import com.google.gson.Gson;
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import com.velocitypowered.api.event.Subscribe;
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import com.velocitypowered.api.plugin.Plugin;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.List;
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import java.util.Objects;
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import java.util.Set;
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import javax.annotation.Nullable;
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import javax.annotation.processing.AbstractProcessor;
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import javax.annotation.processing.Messager;
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import javax.annotation.processing.ProcessingEnvironment;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ElementKind;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.Modifier;
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import javax.lang.model.element.Name;
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import javax.lang.model.element.TypeElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.util.Elements;
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import javax.lang.model.util.Types;
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import javax.tools.Diagnostic;
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import javax.tools.Diagnostic.Kind;
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import javax.tools.FileObject;
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import javax.tools.StandardLocation;
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@SupportedAnnotationTypes({PLUGIN_ANNOTATION_CLASS, SUBSCRIBE_ANNOTATION_CLASS})
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public class ApiAnnotationProcessor extends AbstractProcessor {
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private @Nullable String pluginClassFound;
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private boolean warnedAboutMultiplePlugins;
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@Override
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public SourceVersion getSupportedSourceVersion() {
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return SourceVersion.latestSupported();
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}
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@Override
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public synchronized boolean process(Set<? extends TypeElement> annotations,
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RoundEnvironment roundEnv) {
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if (ProcessorUtils.contains(annotations, Subscribe.class)) {
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for (final Element e : roundEnv.getElementsAnnotatedWith(Subscribe.class)) {
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if (e.getKind() != ElementKind.METHOD) {
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this.processingEnv.getMessager().printMessage(
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Kind.ERROR, "Invalid element of type " + e.getKind()
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+ " annotated with @Subscribe", e);
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continue;
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}
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final ExecutableElement method = (ExecutableElement) e;
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final Messager msg = this.processingEnv.getMessager();
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if (method.getModifiers().contains(Modifier.STATIC)) {
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msg.printMessage(Diagnostic.Kind.ERROR, "method must not be static", method);
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}
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if (!method.getModifiers().contains(Modifier.PUBLIC)) {
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msg.printMessage(Diagnostic.Kind.ERROR, "method must be public", method);
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}
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if (method.getModifiers().contains(Modifier.ABSTRACT)) {
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msg.printMessage(Diagnostic.Kind.ERROR,
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"method must not be abstract", method);
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}
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if (method.getEnclosingElement().getKind().isInterface()) {
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msg.printMessage(Diagnostic.Kind.ERROR,
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"interfaces cannot declare listeners", method);
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}
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if (method.getReturnType().getKind() != TypeKind.VOID
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&& !this.isTypeSubclass(method.getReturnType(), EVENTTASK_CLASS)) {
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msg.printMessage(Kind.ERROR, "method must return void or EventTask", method);
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}
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final List<? extends VariableElement> parameters = method.getParameters();
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if (parameters.isEmpty() || !this.isTypeSubclass(parameters.get(0), SUBSCRIBE_ANNOTATION_CLASS)) {
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msg.printMessage(Diagnostic.Kind.ERROR,
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"method must have an Event as its first parameter", method);
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}
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}
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} else if (ProcessorUtils.contains(annotations, Plugin.class)) {
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for (Element element : roundEnv.getElementsAnnotatedWith(Plugin.class)) {
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if (element.getKind() != ElementKind.CLASS) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.ERROR, "Only classes can be annotated with "
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+ Plugin.class.getCanonicalName());
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return false;
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}
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Name qualifiedName = ((TypeElement) element).getQualifiedName();
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if (Objects.equals(pluginClassFound, qualifiedName.toString())) {
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if (!warnedAboutMultiplePlugins) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.WARNING, "Velocity does not yet currently support "
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+ "multiple plugins. We are using " + pluginClassFound
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+ " for your plugin's main class.");
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warnedAboutMultiplePlugins = true;
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}
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return false;
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}
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Plugin plugin = element.getAnnotation(Plugin.class);
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if (!SerializedPluginDescription.ID_PATTERN.matcher(plugin.id()).matches()) {
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processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Invalid ID for plugin "
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+ qualifiedName
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+ ". IDs must start alphabetically, have alphanumeric characters, and can "
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+ "contain dashes or underscores.");
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return false;
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}
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// All good, generate the velocity-plugin.json.
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SerializedPluginDescription description = SerializedPluginDescription
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.from(plugin, qualifiedName.toString());
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try {
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FileObject object = processingEnv.getFiler()
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.createResource(StandardLocation.CLASS_OUTPUT, "", "velocity-plugin.json");
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try (Writer writer = new BufferedWriter(object.openWriter())) {
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new Gson().toJson(description, writer);
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}
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pluginClassFound = qualifiedName.toString();
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} catch (IOException e) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.ERROR, "Unable to generate plugin file");
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}
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}
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}
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return false;
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}
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private boolean isTypeSubclass(final Element typedElement, final String subclass) {
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return isTypeSubclass(typedElement.asType(), subclass);
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}
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private boolean isTypeSubclass(final TypeMirror typeMirror, final String subclass) {
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final Elements elements = this.processingEnv.getElementUtils();
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final Types types = this.processingEnv.getTypeUtils();
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final TypeMirror event = types.getDeclaredType(elements.getTypeElement(subclass));
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return types.isAssignable(typeMirror, event);
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}
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}
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@ -1,107 +0,0 @@
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/*
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* Copyright (C) 2018 Velocity Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation, either version 3 of the License, or
|
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
|
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.velocitypowered.annotationprocessor;
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import com.google.gson.Gson;
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import com.velocitypowered.api.plugin.Plugin;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.Objects;
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import java.util.Set;
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import javax.annotation.Nullable;
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import javax.annotation.processing.AbstractProcessor;
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import javax.annotation.processing.ProcessingEnvironment;
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import javax.annotation.processing.RoundEnvironment;
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import javax.annotation.processing.SupportedAnnotationTypes;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ElementKind;
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import javax.lang.model.element.Name;
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import javax.lang.model.element.TypeElement;
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import javax.tools.Diagnostic;
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import javax.tools.FileObject;
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import javax.tools.StandardLocation;
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@SupportedAnnotationTypes({"com.velocitypowered.api.plugin.Plugin"})
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public class PluginAnnotationProcessor extends AbstractProcessor {
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private @Nullable String pluginClassFound;
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private boolean warnedAboutMultiplePlugins;
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@Override
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public SourceVersion getSupportedSourceVersion() {
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return SourceVersion.latestSupported();
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}
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@Override
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public synchronized boolean process(Set<? extends TypeElement> annotations,
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RoundEnvironment roundEnv) {
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if (roundEnv.processingOver()) {
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return false;
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}
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for (Element element : roundEnv.getElementsAnnotatedWith(Plugin.class)) {
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if (element.getKind() != ElementKind.CLASS) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.ERROR, "Only classes can be annotated with "
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+ Plugin.class.getCanonicalName());
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return false;
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}
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Name qualifiedName = ((TypeElement) element).getQualifiedName();
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if (Objects.equals(pluginClassFound, qualifiedName.toString())) {
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if (!warnedAboutMultiplePlugins) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.WARNING, "Velocity does not yet currently support "
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+ "multiple plugins. We are using " + pluginClassFound
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+ " for your plugin's main class.");
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warnedAboutMultiplePlugins = true;
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}
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return false;
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}
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Plugin plugin = element.getAnnotation(Plugin.class);
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if (!SerializedPluginDescription.ID_PATTERN.matcher(plugin.id()).matches()) {
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processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Invalid ID for plugin "
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+ qualifiedName
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+ ". IDs must start alphabetically, have alphanumeric characters, and can "
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+ "contain dashes or underscores.");
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return false;
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}
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// All good, generate the velocity-plugin.json.
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SerializedPluginDescription description = SerializedPluginDescription
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.from(plugin, qualifiedName.toString());
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try {
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FileObject object = processingEnv.getFiler()
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.createResource(StandardLocation.CLASS_OUTPUT, "", "velocity-plugin.json");
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try (Writer writer = new BufferedWriter(object.openWriter())) {
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new Gson().toJson(description, writer);
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}
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pluginClassFound = qualifiedName.toString();
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} catch (IOException e) {
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processingEnv.getMessager()
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.printMessage(Diagnostic.Kind.ERROR, "Unable to generate plugin file");
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}
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}
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return false;
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}
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}
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@ -0,0 +1,70 @@
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/*
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* Copyright (C) 2018 Velocity Contributors
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*
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* This program is free software: you can redistribute it and/or modify
|
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation, either version 3 of the License, or
|
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* (at your option) any later version.
|
||||
*
|
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* This program is distributed in the hope that it will be useful,
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
|
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*
|
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.velocitypowered.annotationprocessor;
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import java.util.Collection;
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import javax.lang.model.element.TypeElement;
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/*
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* This file is derived from the Sponge API. The original copyright notice is reproduced below:
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*
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* This file is part of SpongeAPI, licensed under the MIT License (MIT).
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*
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* Copyright (c) SpongePowered <https://www.spongepowered.org>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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final class ProcessorUtils {
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private ProcessorUtils() {
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}
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static boolean contains(final Collection<? extends TypeElement> elements, final Class<?> clazz) {
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if (elements.isEmpty()) {
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return false;
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}
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final String name = clazz.getName();
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for (final TypeElement element : elements) {
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if (element.getQualifiedName().contentEquals(name)) {
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return true;
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}
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}
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return false;
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}
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}
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@ -1 +1 @@
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com.velocitypowered.annotationprocessor.PluginAnnotationProcessor
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com.velocitypowered.annotationprocessor.ApiAnnotationProcessor
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