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package org.bukkit.plugin.java.annotation;
import org.bukkit.plugin.PluginLoadOrder;
import org.bukkit.plugin.java.JavaPlugin;
import org.yaml.snakeyaml.Yaml;
import javax.annotation.processing.*;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
@SupportedAnnotationTypes("org.bukkit.plugin.java.annotation.*")
@SupportedSourceVersion(SourceVersion.RELEASE_6)
public class PluginAnnotationProcessor extends AbstractProcessor {
private boolean hasMainBeenFound = false;
private static final DateFormat dFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
@Override
public boolean process(Set<? extends TypeElement> annots, RoundEnvironment rEnv) {
Element main = null;
for(Element el : rEnv.getElementsAnnotatedWith(Main.class)) {
if(main != null){
raiseError("More than one class with @Main found, aborting!");
return false;
}
main = el;
}
if(main == null) return false;
if(hasMainBeenFound){
raiseError("More than one class with @Main found, aborting!");
return false;
}
hasMainBeenFound = true;
TypeElement mainType;
if(main instanceof TypeElement){
mainType = (TypeElement) main;
} else {
raiseError("Element annotated with @Main is not a type!");
return false;
}
if(!(mainType.getEnclosingElement() instanceof PackageElement) && !mainType.getModifiers().contains(Modifier.STATIC)){
raiseError("Element annotated with @Main is not top-level or static nested!");
return false;
}
if(!processingEnv.getTypeUtils().isSubtype(mainType.asType(), fromClass(JavaPlugin.class))){
raiseError("Class annotated with @Main is not an subclass of JavaPlugin!");
}
Map<String, Object> yml = new HashMap<String, Object>();
final String mainName = mainType.getQualifiedName().toString();
yml.put("main", mainName);
processAndPut(yml, "name", mainType, mainName.substring(mainName.lastIndexOf('.') + 1), Name.class, String.class);
processAndPut(yml, "version", mainType, Version.DEFAULT_VERSION, Version.class, String.class);
processAndPut(yml, "description", mainType, null, Description.class, String.class);
processAndPut(yml, "load", mainType, null, LoadOn.class, String.class);
{
String[] authors = process(mainType, new String[0], Author.class, String[].class);
switch(authors.length) {
case 0: break;
case 1: yml.put("author", authors[0]); break;
default: yml.put("authors", authors); break;
}
}
processAndPut(yml, "website", mainType, null, Website.class, String.class);
if(mainType.getAnnotation(UsesDatabase.class) != null) yml.put("database", true);
processAndPut(yml, "depend", mainType, null, DependsOn.class, String[].class);
processAndPut(yml, "softdepend", mainType, null, SoftDependsOn.class, String[].class);
processAndPut(yml, "prefix", mainType, null, LogPrefix.class, String.class);
processAndPut(yml, "loadbefore", mainType, null, LoadBefore.class, String[].class);
Commands.Cmd[] commands = process(mainType, new Commands.Cmd[0], Commands.class, Commands.Cmd[].class);
Map<String, Object> commandMap = new HashMap<String, Object>();
for(Commands.Cmd cmd : commands) {
String name = cmd.value();
Map<String, Object> desc = new HashMap<String, Object>();
if(!cmd.desc().isEmpty()) desc.put("description", cmd.desc());
if(cmd.aliases().length != 0) desc.put("aliases", cmd.aliases());
if(!cmd.permission().isEmpty()) desc.put("permission", cmd.permission());
if(!cmd.permissionMessage().isEmpty()) desc.put("permission-message", cmd.permissionMessage());
if(!cmd.usage().isEmpty()) desc.put("usage", cmd.usage());
commandMap.put(name, desc);
}
if(!commandMap.isEmpty()) yml.put("commands", commandMap);
Permissions.Perm[] perms = process(mainType, new Permissions.Perm[0], Permissions.class, Permissions.Perm[].class);
Map<String, Object> permMap = new HashMap<String, Object>();
for(Permissions.Perm perm : perms) {
String name = perm.value();
Map<String, Object> desc = new HashMap<String, Object>();
if(!perm.desc().isEmpty()) desc.put("description", perm.desc());
desc.put("default", perm.defaultValue().toString());
Map<String, Object> children = new HashMap<String, Object>();
for(String p : perm.children()) children.put(p, true);
for(String p : perm.antichildren()) children.put(p, false);
if(!children.isEmpty()) desc.put("children", children);
permMap.put(name, desc);
}
if(!permMap.isEmpty()) yml.put("permissions", permMap);
Yaml yaml = new Yaml();
try {
FileObject file = this.processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", "plugin.yml");
Writer w = file.openWriter();
try{
w.append("# Auto-generated plugin.yml, generated at ").append(dFormat.format(new Date())).append(" by ").append(this.getClass().getName()).append("\n\n");
yaml.dump(yml, w);
} finally {
w.flush();
w.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING, "NOTE: You are using org.bukkit.plugin.java.annotation, an experimental API!");
return true;
}
private void raiseError(String message) {
this.processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, message);
}
private TypeMirror fromClass(Class<?> clazz) {
return processingEnv.getElementUtils().getTypeElement(clazz.getName()).asType();
}
private <A extends Annotation, R> R processAndPut(
Map<String, Object> map, String name, Element el, R defaultVal, Class<A> annotationType, Class<R> returnType) {
R result = process(el, defaultVal, annotationType, returnType);
if(result != null)
map.put(name, result);
return result;
}
private <A extends Annotation, R> R process(Element el, R defaultVal, Class<A> annotationType, Class<R> returnType) {
R result;
A ann = el.getAnnotation(annotationType);
if(ann == null) result = defaultVal;
else {
try {
Method value = annotationType.getMethod("value");
Object res = value.invoke(ann);
result = (R) (returnType == String.class ? res.toString() : returnType.cast(res));
} catch (Exception e) {
throw new RuntimeException(e); // shouldn't happen in theory
}
}
return result;
}
}
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