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feat: MVP!

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zaaarf 2023-02-27 02:26:06 +01:00
parent 25869ddc92
commit 252272ac42
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2 changed files with 99 additions and 68 deletions
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7
build.gradle
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@ -3,14 +3,17 @@ plugins {
} }
group 'ftbsc.lll.processor' group 'ftbsc.lll.processor'
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories { repositories {
mavenCentral() mavenCentral()
maven { url = 'https://maven.fantabos.co' } maven { url = 'https://maven.fantabos.co' }
} }
//TODO: figure out how to make annotationProcessor inherit its dependencies
dependencies { dependencies {
implementation 'com.squareup:javapoet:1.13.0' implementation 'com.squareup:javapoet:1.13.0'
implementation 'ftbsc:lll:0.2.0' implementation 'ftbsc:lll:0.2.1'
implementation 'org.ow2.asm:asm-commons:9.4' //just for the javadocs implementation 'org.ow2.asm:asm-commons:9.4'
} }

140
src/main/java/ftbsc/lll/processor/LilleroProcessor.java
View file

@ -4,6 +4,7 @@ import com.squareup.javapoet.*;
import ftbsc.lll.IInjector; import ftbsc.lll.IInjector;
import ftbsc.lll.processor.annotations.Injector; import ftbsc.lll.processor.annotations.Injector;
import ftbsc.lll.processor.annotations.Patch; import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.annotations.Target;
import ftbsc.lll.processor.exceptions.MappingNotFoundException; import ftbsc.lll.processor.exceptions.MappingNotFoundException;
import ftbsc.lll.processor.exceptions.MappingsFileNotFoundException; import ftbsc.lll.processor.exceptions.MappingsFileNotFoundException;
import ftbsc.lll.tools.DescriptorBuilder; import ftbsc.lll.tools.DescriptorBuilder;
@ -13,24 +14,22 @@ import org.objectweb.asm.tree.MethodNode;
import javax.annotation.processing.*; import javax.annotation.processing.*;
import javax.lang.model.SourceVersion; import javax.lang.model.SourceVersion;
import javax.lang.model.element.ExecutableElement; import javax.lang.model.element.*;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.ExecutableType; import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.MirroredTypeException;
import javax.lang.model.type.TypeMirror; import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic; import javax.tools.Diagnostic;
import javax.tools.FileObject; import javax.tools.FileObject;
import javax.tools.JavaFileObject; import javax.tools.JavaFileObject;
import javax.tools.StandardLocation; import javax.tools.StandardLocation;
import java.io.IOException; import java.io.*;
import java.io.PrintWriter;
import java.lang.annotation.Annotation; import java.lang.annotation.Annotation;
import java.lang.annotation.Target; import java.net.URL;
import java.nio.file.Files; import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.util.HashSet; import java.util.HashSet;
import java.util.List; import java.util.List;
import java.util.Set; import java.util.Set;
import java.util.stream.Collectors;
/** /**
* The actual annotation processor behind the magic. * The actual annotation processor behind the magic.
@ -39,6 +38,11 @@ import java.util.Set;
@SupportedAnnotationTypes("ftbsc.lll.processor.annotations.Patch") @SupportedAnnotationTypes("ftbsc.lll.processor.annotations.Patch")
@SupportedSourceVersion(SourceVersion.RELEASE_8) @SupportedSourceVersion(SourceVersion.RELEASE_8)
public class LilleroProcessor extends AbstractProcessor { public class LilleroProcessor extends AbstractProcessor {
/**
* A {@link Set} of {@link String}s that will contain the fully qualified names
* of the generated injector files.
*/
private final Set<String> generatedInjectors = new HashSet<>();
/** /**
* Where the actual processing happens. * Where the actual processing happens.
@ -52,23 +56,32 @@ public class LilleroProcessor extends AbstractProcessor {
*/ */
@Override @Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
Set<TypeElement> validInjectors = new HashSet<>();
for (TypeElement annotation : annotations) { for (TypeElement annotation : annotations) {
if(isValidInjector(annotation)) if(annotation.getQualifiedName().toString().equals(Patch.class.getName())) {
validInjectors.add(annotation); Set<TypeElement> validInjectors = new HashSet<>();
Set<TypeElement> potentialInjectors =
roundEnv.getElementsAnnotatedWith(annotation)
.stream()
.map(e -> (TypeElement) e)
.collect(Collectors.toSet());
for(TypeElement p : potentialInjectors)
if(isValidInjector(p))
validInjectors.add(p);
else processingEnv.getMessager().printMessage( else processingEnv.getMessager().printMessage(
Diagnostic.Kind.WARNING, Diagnostic.Kind.WARNING,
"Missing valid inject() method on @Injector class " + annotation.getQualifiedName() + "." "Missing valid @Injector method in @Patch class " + p + ", skipping."
); );
}
if(validInjectors.isEmpty()) if(validInjectors.isEmpty())
return false; return false;
validInjectors.forEach(this::generateInjector); validInjectors.forEach(this::generateInjector);
generateServiceProvider(validInjectors); if(this.generatedInjectors.isEmpty())
return false;
generateServiceProvider();
return true; return true;
} }
}
return false;
}
/** /**
* This checks whether a given class contains the requirements to be parsed into a Lillero injector. * This checks whether a given class contains the requirements to be parsed into a Lillero injector.
@ -84,7 +97,7 @@ public class LilleroProcessor extends AbstractProcessor {
&& elem.getEnclosedElements().stream().anyMatch(e -> { && elem.getEnclosedElements().stream().anyMatch(e -> {
List<? extends TypeMirror> params = ((ExecutableType) e.asType()).getParameterTypes(); List<? extends TypeMirror> params = ((ExecutableType) e.asType()).getParameterTypes();
return e.getAnnotation(Injector.class) != null return e.getAnnotation(Injector.class) != null
&& e.getAnnotation(Target.class) != null && e.getAnnotation(Target.class) == null
&& e.getModifiers().contains(Modifier.PUBLIC) && e.getModifiers().contains(Modifier.PUBLIC)
&& e.getModifiers().contains(Modifier.STATIC) && e.getModifiers().contains(Modifier.STATIC)
&& params.size() == 2 && params.size() == 2
@ -103,22 +116,21 @@ public class LilleroProcessor extends AbstractProcessor {
* @return the {@link MethodSpec} representing the desired method * @return the {@link MethodSpec} representing the desired method
*/ */
@SuppressWarnings("OptionalGetWithoutIsPresent") @SuppressWarnings("OptionalGetWithoutIsPresent")
private static MethodSpec findAnnotatedMethod(TypeElement cl, Class<? extends Annotation> ann) { private static ExecutableElement findAnnotatedMethod(TypeElement cl, Class<? extends Annotation> ann) {
return MethodSpec.overriding( return (ExecutableElement) cl.getEnclosedElements()
(ExecutableElement) cl.getEnclosedElements()
.stream() .stream()
.filter(e -> e.getAnnotation(ann) != null) .filter(e -> e.getAnnotation(ann) != null)
.findFirst() .findFirst()
.get() //will never be null so can ignore warning .get(); //will never be null so can ignore warning
).build();
} }
/** /**
* Builds a type descriptor from the given {@link TypeName} * Builds a type descriptor from the given {@link TypeMirror}
* @param type the {@link TypeName} representing the desired type * @param t the {@link TypeMirror} representing the desired type
* @return a {@link String} containing the relevant descriptor * @return a {@link String} containing the relevant descriptor
*/ */
public static String descriptorFromType(TypeName type) { public static String descriptorFromType(TypeMirror t) {
TypeName type = TypeName.get(t);
StringBuilder desc = new StringBuilder(); StringBuilder desc = new StringBuilder();
//add array brackets //add array brackets
while(type instanceof ArrayTypeName) { while(type instanceof ArrayTypeName) {
@ -128,7 +140,6 @@ public class LilleroProcessor extends AbstractProcessor {
if(type instanceof ClassName) { if(type instanceof ClassName) {
ClassName var = (ClassName) type; ClassName var = (ClassName) type;
desc.append(DescriptorBuilder.nameToDescriptor(var.canonicalName(), 0)); desc.append(DescriptorBuilder.nameToDescriptor(var.canonicalName(), 0));
desc.append(";");
} else { } else {
if(TypeName.BOOLEAN.equals(type)) if(TypeName.BOOLEAN.equals(type))
desc.append("Z"); desc.append("Z");
@ -146,21 +157,23 @@ public class LilleroProcessor extends AbstractProcessor {
desc.append("J"); desc.append("J");
else if(TypeName.DOUBLE.equals(type)) else if(TypeName.DOUBLE.equals(type))
desc.append("D"); desc.append("D");
else if(TypeName.VOID.equals(type))
desc.append("V");
} }
return desc.toString(); return desc.toString();
} }
/** /**
* Builds a method descriptor from the given {@link MethodSpec}. * Builds a method descriptor from the given {@link ExecutableElement}.
* @param m the {@link MethodSpec} for the method * @param m the {@link ExecutableElement} for the method
* @return a {@link String} containing the relevant descriptor * @return a {@link String} containing the relevant descriptor
*/ */
public static String descriptorFromMethodSpec(MethodSpec m) { public static String descriptorFromMethodSpec(ExecutableElement m) {
StringBuilder methodSignature = new StringBuilder(); StringBuilder methodSignature = new StringBuilder();
methodSignature.append("("); methodSignature.append("(");
m.parameters.forEach(p -> methodSignature.append(descriptorFromType(p.type))); m.getParameters().forEach(p -> methodSignature.append(descriptorFromType(p.asType())));
methodSignature.append(")"); methodSignature.append(")");
methodSignature.append(descriptorFromType(m.returnType)); methodSignature.append(descriptorFromType(m.getReturnType()));
return methodSignature.toString(); return methodSignature.toString();
} }
@ -171,29 +184,34 @@ public class LilleroProcessor extends AbstractProcessor {
*/ */
private void generateInjector(TypeElement cl) { private void generateInjector(TypeElement cl) {
Patch ann = cl.getAnnotation(Patch.class); Patch ann = cl.getAnnotation(Patch.class);
MethodSpec targetMethod = findAnnotatedMethod(cl, Target.class); ExecutableElement targetMethod = findAnnotatedMethod(cl, Target.class);
MethodSpec injectorMethod = findAnnotatedMethod(cl, Injector.class); ExecutableElement injectorMethod = findAnnotatedMethod(cl, Injector.class);
SrgMapper mapper; SrgMapper mapper;
try { try { //TODO: cant we get it from local?
mapper = new SrgMapper(Files.lines(Paths.get("build/createMcpToSrg/output.tsrg"))); URL url = new URL("https://data.fantabos.co/output.tsrg");
InputStream is = url.openStream();
mapper = new SrgMapper(new BufferedReader(new InputStreamReader(is,
StandardCharsets.UTF_8)).lines());
is.close();
} catch(IOException e) { } catch(IOException e) {
throw new MappingsFileNotFoundException(); throw new MappingsFileNotFoundException();
} }
String packageName = cl.getQualifiedName().toString().replace("." + cl.getSimpleName().toString(), ""); Element packageElement = cl.getEnclosingElement();
while (packageElement.getKind() != ElementKind.PACKAGE)
packageElement = packageElement.getEnclosingElement();
String packageName = packageElement.toString();
String className = cl.getQualifiedName().toString();
String simpleClassName = cl.getSimpleName().toString(); String simpleClassName = cl.getSimpleName().toString();
String injectorClassName = className + "Injector";
String injectorSimpleClassName = simpleClassName + "Injector"; String injectorSimpleClassName = simpleClassName + "Injector";
String injectorClassName = packageName + "." + injectorSimpleClassName;
MethodSpec name = MethodSpec.methodBuilder("name") MethodSpec name = MethodSpec.methodBuilder("name")
.addModifiers(Modifier.PUBLIC) .addModifiers(Modifier.PUBLIC)
.returns(String.class) .returns(String.class)
.addStatement("return $S", simpleClassName) .addStatement("return $S", injectorSimpleClassName)
.build(); .build();
MethodSpec reason = MethodSpec.methodBuilder("reason") MethodSpec reason = MethodSpec.methodBuilder("reason")
@ -202,27 +220,35 @@ public class LilleroProcessor extends AbstractProcessor {
.addStatement("return $S", ann.reason()) .addStatement("return $S", ann.reason())
.build(); .build();
String targetClassCanonicalName;
try {
targetClassCanonicalName = ann.value().getCanonicalName();
} catch(MirroredTypeException e) {
targetClassCanonicalName = e.getTypeMirror().toString();
}
//pretty sure class names de facto never change but better safe than sorry //pretty sure class names de facto never change but better safe than sorry
String targetClassSrgName = mapper.getMcpClass( String targetClassSrgName = mapper.getMcpClass(
ClassName.get(ann.value()).canonicalName().replace('.', '/') targetClassCanonicalName.replace('.', '/')
); );
if(targetClassSrgName == null) if(targetClassSrgName == null)
throw new MappingNotFoundException(ClassName.get(ann.value()).canonicalName()); throw new MappingNotFoundException(targetClassCanonicalName);
MethodSpec targetClass = MethodSpec.methodBuilder("targetClass") MethodSpec targetClass = MethodSpec.methodBuilder("targetClass")
.addModifiers(Modifier.PUBLIC) .addModifiers(Modifier.PUBLIC)
.returns(String.class) .returns(String.class)
.addStatement("return $S", targetClassSrgName) .addStatement("return $S", targetClassSrgName.replace('/', '.'))
.build(); .build();
String targetMethodDescriptor = descriptorFromMethodSpec(targetMethod); String targetMethodDescriptor = descriptorFromMethodSpec(targetMethod);
String targetMethodSrgName = mapper.getSrgMember( String targetMethodSrgName = mapper.getSrgMember(
ann.value().getName(), targetMethod.name + " " + targetMethodDescriptor targetClassCanonicalName.replace('.', '/'),
targetMethod.getSimpleName() + " " + targetMethodDescriptor
); );
if(targetMethodSrgName == null) if(targetMethodSrgName == null)
throw new MappingNotFoundException(targetMethod.name + " " + targetMethodDescriptor); throw new MappingNotFoundException(targetMethod.getSimpleName() + " " + targetMethodDescriptor);
MethodSpec methodName = MethodSpec.methodBuilder("methodName") MethodSpec methodName = MethodSpec.methodBuilder("methodName")
.addModifiers(Modifier.PUBLIC) .addModifiers(Modifier.PUBLIC)
@ -233,21 +259,21 @@ public class LilleroProcessor extends AbstractProcessor {
MethodSpec methodDesc = MethodSpec.methodBuilder("methodDesc") MethodSpec methodDesc = MethodSpec.methodBuilder("methodDesc")
.addModifiers(Modifier.PUBLIC) .addModifiers(Modifier.PUBLIC)
.returns(String.class) .returns(String.class)
.addCode("return $S", targetMethodDescriptor) .addCode("return $S;", targetMethodDescriptor)
.build(); .build();
MethodSpec inject = MethodSpec.methodBuilder("inject") MethodSpec inject = MethodSpec.methodBuilder("inject")
.addModifiers(Modifier.PUBLIC) .addModifiers(Modifier.PUBLIC)
.returns(void.class) .returns(void.class)
.addParameter(ParameterSpec.builder( .addParameter(ParameterSpec.builder(
(TypeName) processingEnv TypeName.get(processingEnv
.getElementUtils() .getElementUtils()
.getTypeElement("org.objectweb.asm.tree.ClassNode").asType(), "clazz").build()) .getTypeElement("org.objectweb.asm.tree.ClassNode").asType()), "clazz").build())
.addParameter(ParameterSpec.builder( .addParameter(ParameterSpec.builder(
(TypeName) processingEnv TypeName.get(processingEnv
.getElementUtils() .getElementUtils()
.getTypeElement("org.objectweb.asm.tree.MethodNode").asType(), "main").build()) .getTypeElement("org.objectweb.asm.tree.MethodNode").asType()), "main").build())
.addStatement("$S.$S(clazz, main)", className, injectorMethod.name) .addStatement("$T." + injectorMethod.getSimpleName() + "(clazz, main)", TypeName.get(cl.asType()))
.build(); .build();
TypeSpec injectorClass = TypeSpec.classBuilder(injectorSimpleClassName) TypeSpec injectorClass = TypeSpec.classBuilder(injectorSimpleClassName)
@ -267,6 +293,7 @@ public class LilleroProcessor extends AbstractProcessor {
JavaFile javaFile = JavaFile.builder(packageName, injectorClass).build(); JavaFile javaFile = JavaFile.builder(packageName, injectorClass).build();
javaFile.writeTo(out); javaFile.writeTo(out);
out.close(); out.close();
this.generatedInjectors.add(injectorClassName);
} catch(IOException e) { } catch(IOException e) {
throw new RuntimeException(e); throw new RuntimeException(e);
} }
@ -274,14 +301,15 @@ public class LilleroProcessor extends AbstractProcessor {
/** /**
* Generates the Service Provider file for the generated injectors. * Generates the Service Provider file for the generated injectors.
* It gets their names by appending "Injector" to the original class.
* @param inj a {@link Set} of {@link TypeElement} representing the valid injector generators
*/ */
private void generateServiceProvider(Set<TypeElement> inj) { private void generateServiceProvider() {
try { try {
FileObject serviceProvider = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", "ftbsc.lll.IInjector"); FileObject serviceProvider =
processingEnv.getFiler().createResource(
StandardLocation.CLASS_OUTPUT, "", "META-INF/services/ftbsc.lll.IInjector"
);
PrintWriter out = new PrintWriter(serviceProvider.openWriter()); PrintWriter out = new PrintWriter(serviceProvider.openWriter());
inj.forEach(i -> out.println(i.getQualifiedName() + "Injector")); this.generatedInjectors.forEach(out::println);
out.close(); out.close();
} catch(IOException e) { } catch(IOException e) {
throw new RuntimeException(e); throw new RuntimeException(e);